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[proxmark3-svn] / armsrc / mifareutil.c
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20f9a2a1 1//-----------------------------------------------------------------------------\r
b62a5a84 2// Merlok, May 2011, 2012\r
8f51ddb0 3// Many authors, whom made it possible\r
20f9a2a1
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4//\r
5// This code is licensed to you under the terms of the GNU GPL, version 2 or,\r
6// at your option, any later version. See the LICENSE.txt file for the text of\r
7// the license.\r
8//-----------------------------------------------------------------------------\r
8f51ddb0 9// Work with mifare cards.\r
20f9a2a1
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10//-----------------------------------------------------------------------------\r
11\r
12#include "proxmark3.h"\r
13#include "apps.h"\r
14#include "util.h"\r
15#include "string.h"\r
16\r
17#include "iso14443crc.h"\r
18#include "iso14443a.h"\r
19#include "crapto1.h"\r
20#include "mifareutil.h"\r
21\r
f397b5cc
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22int MF_DBGLEVEL = MF_DBG_ALL;\r
23\r
8f51ddb0 24// memory management\r
20f9a2a1 25uint8_t* mifare_get_bigbufptr(void) {\r
8f51ddb0
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26 return (((uint8_t *)BigBuf) + MIFARE_BUFF_OFFSET); // was 3560 - tied to other size changes\r
27}\r
28uint8_t* eml_get_bigbufptr_sendbuf(void) {\r
29 return (((uint8_t *)BigBuf) + RECV_CMD_OFFSET); \r
30}\r
31uint8_t* eml_get_bigbufptr_recbuf(void) {\r
32 return (((uint8_t *)BigBuf) + MIFARE_BUFF_OFFSET);\r
33}\r
34uint8_t* eml_get_bigbufptr_cardmem(void) {\r
35 return (((uint8_t *)BigBuf) + CARD_MEMORY);\r
36}\r
37\r
38// crypto1 helpers\r
39void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){\r
40 uint8_t bt = 0;\r
41 int i;\r
42 \r
43 if (len != 1) {\r
44 for (i = 0; i < len; i++)\r
45 data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];\r
46 } else {\r
47 bt = 0;\r
48 for (i = 0; i < 4; i++)\r
49 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i;\r
50 \r
51 data[0] = bt;\r
52 }\r
53 return;\r
54}\r
55\r
56void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, int len, uint32_t *par) {\r
57 uint8_t bt = 0;\r
58 int i;\r
59 uint32_t mltpl = 1 << (len - 1); // for len=18 it=0x20000\r
60 *par = 0;\r
61 for (i = 0; i < len; i++) {\r
62 bt = data[i];\r
63 data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];\r
64 *par = (*par >> 1) | ( ((filter(pcs->odd) ^ oddparity(bt)) & 0x01) * mltpl );\r
65 } \r
66 return;\r
67}\r
68\r
69uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {\r
70 uint8_t bt = 0;\r
71 int i;\r
72\r
73 for (i = 0; i < 4; i++)\r
74 bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;\r
75 \r
76 return bt;\r
20f9a2a1
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77}\r
78\r
8f51ddb0 79// send commands\r
9492e0b0 80int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer, uint32_t *timing)\r
f89c7050 81{\r
981bd429 82 return mifare_sendcmd_shortex(pcs, crypted, cmd, data, answer, NULL, timing);
83}
84
85int mifare_sendcmd_short_special(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer, uint8_t *timing)
86{
87 uint8_t dcmd[8];//, ecmd[4];
88 //uint32_t par=0;
89
90 dcmd[0] = cmd;
91 dcmd[1] = data[0];
92 dcmd[2] = data[1];
93 dcmd[3] = data[2];
94 dcmd[4] = data[3];
95 dcmd[5] = data[4];
96 AppendCrc14443a(dcmd, 6);
97 //Dbprintf("Data command: %02x", dcmd[0]);
98 //Dbprintf("Data R: %02x %02x %02x %02x %02x %02x %02x", dcmd[1],dcmd[2],dcmd[3],dcmd[4],dcmd[5],dcmd[6],dcmd[7]);
99
100 //memcpy(ecmd, dcmd, sizeof(dcmd));
101 ReaderTransmit(dcmd, sizeof(dcmd), NULL);
102 int len = ReaderReceive(answer);
103 if(!len)
104 {
105 if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Card timeout.");
106 return 2;
107 }
108 return len;
109}
110
111int mifare_sendcmd_shortex(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer, uint32_t * parptr, uint32_t *timing)
112{
113 uint8_t dcmd[4], ecmd[4];
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114 uint32_t pos, par, res;\r
115\r
116 dcmd[0] = cmd;\r
117 dcmd[1] = data;\r
118 AppendCrc14443a(dcmd, 2);\r
119 \r
120 memcpy(ecmd, dcmd, sizeof(dcmd));\r
121 \r
122 if (crypted) {\r
123 par = 0;\r
124 for (pos = 0; pos < 4; pos++)\r
125 {\r
126 ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];\r
127 par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) * 0x08 );\r
128 } \r
129\r
9492e0b0 130 ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing);\r
20f9a2a1
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131\r
132 } else {\r
9492e0b0 133 ReaderTransmit(dcmd, sizeof(dcmd), timing);\r
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134 }\r
135\r
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136 int len = ReaderReceivePar(answer, &par);\r
137 \r
138 if (parptr) *parptr = par;\r
20f9a2a1 139\r
4abe4f58 140 if (crypted == CRYPT_ALL) {\r
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141 if (len == 1) {\r
142 res = 0;\r
143 for (pos = 0; pos < 4; pos++)\r
144 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;\r
145 \r
146 answer[0] = res;\r
147 \r
148 } else {\r
149 for (pos = 0; pos < len; pos++)\r
150 {\r
151 answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];\r
152 }\r
153 }\r
154 }\r
155 \r
156 return len;\r
157}\r
158\r
8f51ddb0 159// mifare commands\r
20f9a2a1 160int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested) \r
f89c7050 161{\r
9492e0b0 162 return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL);\r
f89c7050
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163}\r
164\r
9492e0b0 165int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested, uint32_t * ntptr, uint32_t *timing) \r
20f9a2a1
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166{\r
167 // variables\r
4abe4f58 168 int len; \r
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169 uint32_t pos;\r
170 uint8_t tmp4[4];\r
4abe4f58
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171 byte_t par = 0;\r
172 byte_t ar[4];\r
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173 uint32_t nt, ntpp; // Supplied tag nonce\r
174 \r
175 uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };\r
4abe4f58 176 uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1 177\r
4abe4f58 178 // Transmit MIFARE_CLASSIC_AUTH\r
9492e0b0 179 len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, timing);\r
180 if (MF_DBGLEVEL >= 4) Dbprintf("rand nonce len: %x", len); \r
4abe4f58 181 if (len != 4) return 1;\r
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182 \r
183 ar[0] = 0x55;\r
184 ar[1] = 0x41;\r
185 ar[2] = 0x49;\r
186 ar[3] = 0x92; \r
187 \r
188 // Save the tag nonce (nt)\r
189 nt = bytes_to_num(receivedAnswer, 4);\r
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190\r
191 // ----------------------------- crypto1 create\r
4abe4f58
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192 if (isNested)\r
193 crypto1_destroy(pcs);\r
194\r
195 // Init cipher with key\r
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196 crypto1_create(pcs, ui64Key);\r
197\r
4abe4f58
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198 if (isNested == AUTH_NESTED) {\r
199 // decrypt nt with help of new key \r
200 nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;\r
201 } else {\r
202 // Load (plain) uid^nt into the cipher\r
203 crypto1_word(pcs, nt ^ uid, 0);\r
204 }\r
205\r
206 // some statistic\r
f397b5cc 207 if (!ntptr && (MF_DBGLEVEL >= 3))\r
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208 Dbprintf("auth uid: %08x nt: %08x", uid, nt); \r
209 \r
210 // save Nt\r
211 if (ntptr)\r
212 *ntptr = nt;\r
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213\r
214 par = 0;\r
4abe4f58
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215 // Generate (encrypted) nr+parity by loading it into the cipher (Nr)\r
216 for (pos = 0; pos < 4; pos++)\r
217 {\r
218 mf_nr_ar[pos] = crypto1_byte(pcs, ar[pos], 0) ^ ar[pos];\r
20f9a2a1 219 par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(ar[pos])) & 0x01) * 0x80 );\r
4abe4f58 220 } \r
20f9a2a1 221 \r
4abe4f58
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222 // Skip 32 bits in pseudo random generator\r
223 nt = prng_successor(nt,32);\r
20f9a2a1
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224\r
225 // ar+parity\r
4abe4f58
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226 for (pos = 4; pos < 8; pos++)\r
227 {\r
20f9a2a1 228 nt = prng_successor(nt,8);\r
4abe4f58 229 mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);\r
20f9a2a1 230 par = (par >> 1)| ( ((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) * 0x80 );\r
4abe4f58 231 } \r
20f9a2a1 232 \r
4abe4f58 233 // Transmit reader nonce and reader answer\r
9492e0b0 234 ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);\r
20f9a2a1 235\r
4abe4f58 236 // Receive 4 bit answer\r
20f9a2a1 237 len = ReaderReceive(receivedAnswer);\r
4abe4f58
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238 if (!len)\r
239 {\r
f397b5cc 240 if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Card timeout.");\r
20f9a2a1 241 return 2;\r
4abe4f58 242 }\r
20f9a2a1 243 \r
4abe4f58 244 memcpy(tmp4, receivedAnswer, 4);\r
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245 ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);\r
246 \r
247 if (ntpp != bytes_to_num(tmp4, 4)) {\r
f397b5cc 248 if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Error card response.");\r
20f9a2a1
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249 return 3;\r
250 }\r
251\r
252 return 0;\r
253}\r
254\r
255int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) \r
256{\r
257 // variables\r
4abe4f58 258 int len; \r
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259 uint8_t bt[2];\r
260 \r
4abe4f58 261 uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1 262 \r
4abe4f58 263 // command MIFARE_CLASSIC_READBLOCK\r
9492e0b0 264 len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer, NULL);\r
20f9a2a1 265 if (len == 1) {\r
f397b5cc 266 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); \r
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267 return 1;\r
268 }\r
269 if (len != 18) {\r
f397b5cc 270 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: card timeout. len: %x", len); \r
20f9a2a1
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271 return 2;\r
272 }\r
273\r
274 memcpy(bt, receivedAnswer + 16, 2);\r
4abe4f58 275 AppendCrc14443a(receivedAnswer, 16);\r
20f9a2a1 276 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {\r
f397b5cc 277 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd CRC response error."); \r
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278 return 3;\r
279 }\r
280 \r
281 memcpy(blockData, receivedAnswer, 16);\r
981bd429 282 return 0;
283}
284
285int mifare_ultra_readblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
286{
287 // variables
288 int len;
289 uint8_t bt[2];
290
291 uint8_t* receivedAnswer = mifare_get_bigbufptr();
292
293 // command MIFARE_CLASSIC_READBLOCK
294 len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer,NULL);
295 if (len == 1) {
296 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
297 return 1;
298 }
299 if (len != 18) {
300 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: card timeout. len: %x", len);
301 return 2;
302 }
303
304 memcpy(bt, receivedAnswer + 16, 2);
305 AppendCrc14443a(receivedAnswer, 16);
306 if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
307 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd CRC response error.");
308 return 3;
309 }
310
311 memcpy(blockData, receivedAnswer, 14);
312 return 0;
313}
314
315
316int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData)
317{
318 // variables
4abe4f58 319 int len, i; \r
20f9a2a1 320 uint32_t pos;\r
4abe4f58
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321 uint32_t par = 0;\r
322 byte_t res;\r
20f9a2a1
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323 \r
324 uint8_t d_block[18], d_block_enc[18];\r
4abe4f58 325 uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1 326 \r
4abe4f58 327 // command MIFARE_CLASSIC_WRITEBLOCK\r
9492e0b0 328 len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, NULL);\r
20f9a2a1
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329\r
330 if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK\r
f397b5cc 331 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); \r
20f9a2a1
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332 return 1;\r
333 }\r
334 \r
335 memcpy(d_block, blockData, 16);\r
336 AppendCrc14443a(d_block, 16);\r
337 \r
338 // crypto\r
339 par = 0;\r
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340 for (pos = 0; pos < 18; pos++)\r
341 {\r
342 d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];\r
20f9a2a1 343 par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) * 0x20000 );\r
4abe4f58 344 } \r
20f9a2a1 345\r
9492e0b0 346 ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL);\r
20f9a2a1 347\r
4abe4f58 348 // Receive the response\r
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349 len = ReaderReceive(receivedAnswer); \r
350\r
351 res = 0;\r
352 for (i = 0; i < 4; i++)\r
353 res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;\r
354\r
355 if ((len != 1) || (res != 0x0A)) {\r
f397b5cc 356 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd send data2 Error: %02x", res); \r
20f9a2a1
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357 return 2;\r
358 }\r
359 \r
981bd429 360 return 0;
361}
362
363int mifare_ultra_writeblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
364{
365 // variables
366 int len;
367 uint32_t par = 0;
368
369 uint8_t d_block[18];
370 uint8_t* receivedAnswer = mifare_get_bigbufptr();
371
372 // command MIFARE_CLASSIC_WRITEBLOCK
373 len = mifare_sendcmd_short(NULL, 1, 0xA0, blockNo, receivedAnswer,NULL);
374
375 if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK
376 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Addr Error: %02x", receivedAnswer[0]);
377 return 1;
378 }
379
380 memset(d_block,'\0',18);
381 memcpy(d_block, blockData, 16);
382 AppendCrc14443a(d_block, 16);
383
384 ReaderTransmitPar(d_block, sizeof(d_block), par, NULL);
385
386 // Receive the response
387 len = ReaderReceive(receivedAnswer);
388
389 if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK
390 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Data Error: %02x %d", receivedAnswer[0],len);
391 return 2;
392 }
393
394 return 0;
395}
396
397int mifare_ultra_special_writeblock(uint32_t uid, uint8_t blockNo, uint8_t *blockData)
398{
399 // variables
400 int len;
401 //uint32_t par = 0;
402
403 uint8_t d_block[8];
404 uint8_t* receivedAnswer = mifare_get_bigbufptr();
405
406 // command MIFARE_CLASSIC_WRITEBLOCK
407 memset(d_block,'\0',8);
408 d_block[0]= blockNo;
409 memcpy(d_block+1,blockData,4);
410 AppendCrc14443a(d_block, 6);
411
412 //i know the data send here is correct
413 len = mifare_sendcmd_short_special(NULL, 1, 0xA2, d_block, receivedAnswer,NULL);
414
415 if (receivedAnswer[0] != 0x0A) { // 0x0a - ACK
416 if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Send Error: %02x %d", receivedAnswer[0],len);
417 return 1;
418 }
419 return 0;
420}
421
422int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid)
423{
424 // variables
4abe4f58 425 int len; \r
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426 \r
427 // Mifare HALT\r
4abe4f58 428 uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1 429\r
9492e0b0 430 len = mifare_sendcmd_short(pcs, pcs == NULL ? 0:1, 0x50, 0x00, receivedAnswer, NULL);\r
4abe4f58 431 if (len != 0) {\r
f397b5cc 432 if (MF_DBGLEVEL >= 1) Dbprintf("halt error. response len: %x", len); \r
20f9a2a1
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433 return 1;\r
434 }\r
435\r
981bd429 436 return 0;
437}
438
439int mifare_ultra_halt(uint32_t uid)
440{
441 // variables
442 int len;
443
444 // Mifare HALT
445 uint8_t* receivedAnswer = mifare_get_bigbufptr();
446
447 len = mifare_sendcmd_short(NULL, 1, 0x50, 0x00, receivedAnswer, NULL);
448 if (len != 0) {
449 if (MF_DBGLEVEL >= 1) Dbprintf("halt error. response len: %x", len);
450 return 1;
451 }
452
453 return 0;
454}
455
baeaf579 456\r
457// Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards),\r
458// plus evtl. 8 sectors with 16 blocks each (4k cards)\r
459uint8_t NumBlocksPerSector(uint8_t sectorNo) \r
460{\r
461 if (sectorNo < 32) \r
462 return 4;\r
463 else\r
464 return 16;\r
465}\r
466\r
467uint8_t FirstBlockOfSector(uint8_t sectorNo) \r
468{\r
469 if (sectorNo < 32)\r
470 return sectorNo * 4;\r
471 else\r
472 return 32*4 + (sectorNo - 32) * 16;\r
473 \r
474}\r
475\r
476\r
981bd429 477// work with emulator memory
478void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {
479 uint8_t* emCARD = eml_get_bigbufptr_cardmem();
8f51ddb0
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480 \r
481 memcpy(emCARD + blockNum * 16, data, blocksCount * 16);\r
482}\r
483\r
484void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
485 uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
486 \r
487 memcpy(data, emCARD + blockNum * 16, blocksCount * 16);\r
488}\r
489\r
490void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {\r
491 uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
492 \r
493 memcpy(data, emCARD + bytePtr, byteCount);\r
494}\r
495\r
0014cb46
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496int emlCheckValBl(int blockNum) {\r
497 uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
498 uint8_t* data = emCARD + blockNum * 16;\r
499\r
500 if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||\r
501 (data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||\r
502 (data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||\r
503 (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||\r
504 (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||\r
505 (data[12] != (data[15] ^ 0xff))\r
506 ) \r
507 return 1;\r
508 return 0;\r
509}\r
510\r
511int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {\r
512 uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
513 uint8_t* data = emCARD + blockNum * 16;\r
514 \r
515 if (emlCheckValBl(blockNum)) {\r
516 return 1;\r
517 }\r
518 \r
519 memcpy(blReg, data, 4);\r
520 *blBlock = data[12];\r
521 \r
522 return 0;\r
523}\r
524\r
525int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {\r
526 uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
527 uint8_t* data = emCARD + blockNum * 16;\r
528 \r
529 memcpy(data + 0, &blReg, 4);\r
530 memcpy(data + 8, &blReg, 4);\r
531 blReg = blReg ^ 0xffffffff;\r
532 memcpy(data + 4, &blReg, 4);\r
533 \r
534 data[12] = blBlock;\r
535 data[13] = blBlock ^ 0xff;\r
536 data[14] = blBlock;\r
537 data[15] = blBlock ^ 0xff;\r
538 \r
539 return 0;\r
540}\r
541\r
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542uint64_t emlGetKey(int sectorNum, int keyType) {\r
543 uint8_t key[6];\r
544 uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
545 \r
baeaf579 546 memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);\r
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547 return bytes_to_num(key, 6);\r
548}\r
549\r
8f51ddb0 550void emlClearMem(void) {\r
aea4d766 551 int b;\r
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552 \r
553 const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};\r
8f51ddb0 554 const uint8_t uid[] = {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};\r
aea4d766 555 uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
556 \r
557 memset(emCARD, 0, CARD_MEMORY_LEN);\r
558 \r
559 // fill sectors trailer data\r
560 for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {\r
561 emlSetMem((uint8_t *)trailer, b , 1);\r
562 } \r
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563\r
564 // uid\r
565 emlSetMem((uint8_t *)uid, 0, 1);\r
566 return;\r
567}\r
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