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Merge pull request #435 from ytisf/master
[proxmark3-svn] / client / mifarehost.c
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b62a5a84 1// Merlok, 2011, 2012\r
f397b5cc
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2// people from mifare@nethemba.com, 2010\r
3//\r
4// This code is licensed to you under the terms of the GNU GPL, version 2 or,\r
5// at your option, any later version. See the LICENSE.txt file for the text of\r
6// the license.\r
7//-----------------------------------------------------------------------------\r
55acbb2a 8// mifare commands\r
f397b5cc
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9//-----------------------------------------------------------------------------\r
10\r
4cb4b588 11#include "mifarehost.h"\r
12\r
f397b5cc 13#include <stdio.h>\r
7906cb41 14#include <stdlib.h>\r
31b6e9af 15#include <string.h>\r
9492e0b0 16#include <pthread.h>\r
7cb8516c 17\r
33443e7c 18#include "crapto1/crapto1.h"\r
902cb3c0 19#include "proxmark3.h"\r
7cb8516c 20#include "usb_cmd.h"\r
21#include "cmdmain.h"\r
22#include "ui.h"\r
23#include "util.h"\r
24#include "iso14443crc.h"\r
7cb8516c 25\r
7906cb41
F
26#include "mifare.h"\r
27\r
7cb8516c 28// mifare tracer flags used in mfTraceDecode()\r
29#define TRACE_IDLE 0x00\r
30#define TRACE_AUTH1 0x01\r
31#define TRACE_AUTH2 0x02\r
32#define TRACE_AUTH_OK 0x03\r
33#define TRACE_READ_DATA 0x04\r
34#define TRACE_WRITE_OK 0x05\r
35#define TRACE_WRITE_DATA 0x06\r
36#define TRACE_ERROR 0xFF\r
37\r
f397b5cc 38\r
7779d73c 39static int compare_uint64(const void *a, const void *b) {\r
40 // didn't work: (the result is truncated to 32 bits)\r
41 //return (*(int64_t*)b - *(int64_t*)a);\r
42\r
43 // better:\r
44 if (*(uint64_t*)b == *(uint64_t*)a) return 0;\r
45 else if (*(uint64_t*)b < *(uint64_t*)a) return 1;\r
46 else return -1;\r
47}\r
48\r
49\r
50// create the intersection (common members) of two sorted lists. Lists are terminated by -1. Result will be in list1. Number of elements is returned.\r
51static uint32_t intersection(uint64_t *list1, uint64_t *list2)\r
52{\r
53 if (list1 == NULL || list2 == NULL) {\r
54 return 0;\r
55 }\r
56 uint64_t *p1, *p2, *p3;\r
7906cb41 57 p1 = p3 = list1;\r
7779d73c 58 p2 = list2;\r
59\r
60 while ( *p1 != -1 && *p2 != -1 ) {\r
61 if (compare_uint64(p1, p2) == 0) {\r
62 *p3++ = *p1++;\r
63 p2++;\r
64 }\r
65 else {\r
66 while (compare_uint64(p1, p2) < 0) ++p1;\r
67 while (compare_uint64(p1, p2) > 0) ++p2;\r
68 }\r
69 }\r
70 *p3 = -1;\r
71 return p3 - list1;\r
72}\r
73\r
74\r
75// Darkside attack (hf mf mifare)\r
76static uint32_t nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_t ks_info, uint64_t **keys) {\r
77 struct Crypto1State *states;\r
78 uint32_t i, pos, rr; //nr_diff;\r
79 uint8_t bt, ks3x[8], par[8][8];\r
80 uint64_t key_recovered;\r
81 static uint64_t *keylist;\r
82 rr = 0;\r
83\r
84 // Reset the last three significant bits of the reader nonce\r
85 nr &= 0xffffff1f;\r
86\r
87 for (pos=0; pos<8; pos++) {\r
88 ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;\r
89 bt = (par_info >> (pos*8)) & 0xff;\r
90 for (i=0; i<8; i++) {\r
91 par[7-pos][i] = (bt >> i) & 0x01;\r
92 }\r
93 }\r
94\r
95 states = lfsr_common_prefix(nr, rr, ks3x, par, (par_info == 0));\r
96\r
97 if (states == NULL) {\r
98 *keys = NULL;\r
99 return 0;\r
100 }\r
101\r
102 keylist = (uint64_t*)states;\r
7906cb41 103\r
7779d73c 104 for (i = 0; keylist[i]; i++) {\r
105 lfsr_rollback_word(states+i, uid^nt, 0);\r
106 crypto1_get_lfsr(states+i, &key_recovered);\r
107 keylist[i] = key_recovered;\r
108 }\r
109 keylist[i] = -1;\r
110\r
111 *keys = keylist;\r
112 return i;\r
113}\r
114\r
115\r
116int mfDarkside(uint64_t *key)\r
117{\r
118 uint32_t uid = 0;\r
119 uint32_t nt = 0, nr = 0;\r
120 uint64_t par_list = 0, ks_list = 0;\r
121 uint64_t *keylist = NULL, *last_keylist = NULL;\r
122 uint32_t keycount = 0;\r
123 int16_t isOK = 0;\r
124\r
125 UsbCommand c = {CMD_READER_MIFARE, {true, 0, 0}};\r
126\r
127 // message\r
128 printf("-------------------------------------------------------------------------\n");\r
129 printf("Executing command. Expected execution time: 25sec on average\n");\r
130 printf("Press button on the proxmark3 device to abort both proxmark3 and client.\n");\r
131 printf("-------------------------------------------------------------------------\n");\r
132\r
7906cb41 133\r
7779d73c 134 while (true) {\r
135 clearCommandBuffer();\r
136 SendCommand(&c);\r
7906cb41 137\r
7779d73c 138 //flush queue\r
139 while (ukbhit()) {\r
140 int c = getchar(); (void) c;\r
141 }\r
7906cb41 142\r
7779d73c 143 // wait cycle\r
144 while (true) {\r
145 printf(".");\r
146 fflush(stdout);\r
147 if (ukbhit()) {\r
148 return -5;\r
149 break;\r
150 }\r
7906cb41 151\r
7779d73c 152 UsbCommand resp;\r
153 if (WaitForResponseTimeout(CMD_ACK, &resp, 1000)) {\r
154 isOK = resp.arg[0];\r
155 if (isOK < 0) {\r
156 return isOK;\r
157 }\r
158 uid = (uint32_t)bytes_to_num(resp.d.asBytes + 0, 4);\r
159 nt = (uint32_t)bytes_to_num(resp.d.asBytes + 4, 4);\r
160 par_list = bytes_to_num(resp.d.asBytes + 8, 8);\r
161 ks_list = bytes_to_num(resp.d.asBytes + 16, 8);\r
162 nr = bytes_to_num(resp.d.asBytes + 24, 4);\r
163 break;\r
164 }\r
7906cb41 165 }\r
7779d73c 166\r
167 if (par_list == 0 && c.arg[0] == true) {\r
168 PrintAndLog("Parity is all zero. Most likely this card sends NACK on every failed authentication.");\r
169 PrintAndLog("Attack will take a few seconds longer because we need two consecutive successful runs.");\r
170 }\r
171 c.arg[0] = false;\r
172\r
173 keycount = nonce2key(uid, nt, nr, par_list, ks_list, &keylist);\r
174\r
175 if (keycount == 0) {\r
7906cb41 176 PrintAndLog("Key not found (lfsr_common_prefix list is null). Nt=%08x", nt);\r
7779d73c 177 PrintAndLog("This is expected to happen in 25%% of all cases. Trying again with a different reader nonce...");\r
178 continue;\r
179 }\r
180\r
181 qsort(keylist, keycount, sizeof(*keylist), compare_uint64);\r
182 keycount = intersection(last_keylist, keylist);\r
183 if (keycount == 0) {\r
184 free(last_keylist);\r
185 last_keylist = keylist;\r
186 continue;\r
187 }\r
188\r
189 if (keycount > 1) {\r
190 PrintAndLog("Found %u possible keys. Trying to authenticate with each of them ...\n", keycount);\r
191 } else {\r
192 PrintAndLog("Found a possible key. Trying to authenticate...\n");\r
7906cb41 193 }\r
7779d73c 194\r
195 *key = -1;\r
196 uint8_t keyBlock[USB_CMD_DATA_SIZE];\r
197 int max_keys = USB_CMD_DATA_SIZE/6;\r
198 for (int i = 0; i < keycount; i += max_keys) {\r
199 int size = keycount - i > max_keys ? max_keys : keycount - i;\r
200 for (int j = 0; j < size; j++) {\r
201 if (last_keylist == NULL) {\r
202 num_to_bytes(keylist[i*max_keys + j], 6, keyBlock);\r
203 } else {\r
204 num_to_bytes(last_keylist[i*max_keys + j], 6, keyBlock);\r
205 }\r
206 }\r
207 if (!mfCheckKeys(0, 0, false, size, keyBlock, key)) {\r
208 break;\r
209 }\r
7906cb41
F
210 }\r
211\r
7779d73c 212 if (*key != -1) {\r
213 free(last_keylist);\r
214 free(keylist);\r
215 break;\r
216 } else {\r
217 PrintAndLog("Authentication failed. Trying again...");\r
218 free(last_keylist);\r
219 last_keylist = keylist;\r
220 }\r
221 }\r
7906cb41 222\r
7779d73c 223 return 0;\r
224}\r
225\r
226\r
7cb8516c 227int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
228\r
84ca27b3 229 *key = -1;\r
7cb8516c 230\r
275d9e61 231 UsbCommand c = {CMD_MIFARE_CHKKEYS, {((blockNo & 0xff) | ((keyType & 0xff) << 8)), clear_trace, keycnt}}; \r
7cb8516c 232 memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
233 SendCommand(&c);\r
234\r
235 UsbCommand resp;\r
275d9e61 236 if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1; \r
7cb8516c 237 if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
238 *key = bytes_to_num(resp.d.asBytes, 6);\r
239 return 0;\r
240}\r
241\r
275d9e61
OM
242int mfCheckKeysSec(uint8_t sectorCnt, uint8_t keyType, uint8_t timeout14a, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, sector_t * e_sector){\r
243\r
244 uint8_t keyPtr = 0;\r
245\r
246 if (e_sector == NULL)\r
247 return -1;\r
248\r
249 UsbCommand c = {CMD_MIFARE_CHKKEYS, {((sectorCnt & 0xff) | ((keyType & 0xff) << 8)), (clear_trace | 0x02)|((timeout14a & 0xff) << 8), keycnt}}; \r
250 memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
251 SendCommand(&c);\r
252\r
253 UsbCommand resp;\r
254 if (!WaitForResponseTimeoutW(CMD_ACK, &resp, MAX(3000, 1000 + 13 * sectorCnt * keycnt * (keyType == 2 ? 2 : 1)), false)) return 1; // timeout: 13 ms / fail auth\r
255 if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
256 \r
257 bool foundAKey = false;\r
258 for(int sec = 0; sec < sectorCnt; sec++){\r
259 for(int keyAB = 0; keyAB < 2; keyAB++){\r
260 keyPtr = *(resp.d.asBytes + keyAB * 40 + sec);\r
261 if (keyPtr){\r
262 e_sector[sec].foundKey[keyAB] = true;\r
263 e_sector[sec].Key[keyAB] = bytes_to_num(keyBlock + (keyPtr - 1) * 6, 6);\r
264 foundAKey = true;\r
265 }\r
266 }\r
267 }\r
268 return foundAKey ? 0 : 3;\r
269}\r
270\r
9492e0b0 271// Compare 16 Bits out of cryptostate\r
272int Compare16Bits(const void * a, const void * b) {\r
273 if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;\r
274 else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;\r
275 else return -1;\r
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276}\r
277\r
7906cb41 278typedef\r
9492e0b0 279 struct {\r
280 union {\r
281 struct Crypto1State *slhead;\r
282 uint64_t *keyhead;\r
3f7c993d 283 } head;\r
9492e0b0 284 union {\r
285 struct Crypto1State *sltail;\r
286 uint64_t *keytail;\r
3f7c993d 287 } tail;\r
9492e0b0 288 uint32_t len;\r
289 uint32_t uid;\r
290 uint32_t blockNo;\r
291 uint32_t keyType;\r
292 uint32_t nt;\r
293 uint32_t ks1;\r
294 } StateList_t;\r
295\r
296\r
297// wrapper function for multi-threaded lfsr_recovery32\r
298void* nested_worker_thread(void *arg)\r
299{\r
300 struct Crypto1State *p1;\r
301 StateList_t *statelist = arg;\r
302\r
3f7c993d 303 statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);\r
304 for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r
305 statelist->len = p1 - statelist->head.slhead;\r
306 statelist->tail.sltail = --p1;\r
307 qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r
7906cb41 308\r
3f7c993d 309 return statelist->head.slhead;\r
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310}\r
311\r
7906cb41 312int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t *resultKey, bool calibrate)\r
f397b5cc 313{\r
dc8ba239 314 uint16_t i;\r
f397b5cc 315 uint32_t uid;\r
902cb3c0 316 UsbCommand resp;\r
f397b5cc 317\r
9492e0b0 318 StateList_t statelists[2];\r
319 struct Crypto1State *p1, *p2, *p3, *p4;\r
7906cb41 320\r
f397b5cc 321 // flush queue\r
dc8ba239 322 WaitForResponseTimeout(CMD_ACK, NULL, 100);\r
7906cb41 323\r
9492e0b0 324 UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r
f397b5cc 325 memcpy(c.d.asBytes, key, 6);\r
9492e0b0 326 SendCommand(&c);\r
f397b5cc 327\r
dc8ba239 328 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
329 return -1;\r
330 }\r
f397b5cc 331\r
dc8ba239 332 if (resp.arg[0]) {\r
333 return resp.arg[0]; // error during nested\r
334 }\r
7906cb41 335\r
dc8ba239 336 memcpy(&uid, resp.d.asBytes, 4);\r
337 PrintAndLog("uid:%08x trgbl=%d trgkey=%x", uid, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);\r
7906cb41 338\r
dc8ba239 339 for (i = 0; i < 2; i++) {\r
340 statelists[i].blockNo = resp.arg[2] & 0xff;\r
341 statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r
342 statelists[i].uid = uid;\r
343 memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r
344 memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r
f397b5cc 345 }\r
7906cb41 346\r
f397b5cc 347 // calc keys\r
7906cb41 348\r
9492e0b0 349 pthread_t thread_id[2];\r
7906cb41 350\r
9492e0b0 351 // create and run worker threads\r
352 for (i = 0; i < 2; i++) {\r
353 pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r
f397b5cc 354 }\r
7906cb41 355\r
9492e0b0 356 // wait for threads to terminate:\r
357 for (i = 0; i < 2; i++) {\r
3f7c993d 358 pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r
f397b5cc
M
359 }\r
360\r
f397b5cc 361\r
9492e0b0 362 // the first 16 Bits of the cryptostate already contain part of our key.\r
363 // Create the intersection of the two lists based on these 16 Bits and\r
364 // roll back the cryptostate\r
7906cb41 365 p1 = p3 = statelists[0].head.slhead;\r
3f7c993d 366 p2 = p4 = statelists[1].head.slhead;\r
367 while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r
9492e0b0 368 if (Compare16Bits(p1, p2) == 0) {\r
369 struct Crypto1State savestate, *savep = &savestate;\r
370 savestate = *p1;\r
3f7c993d 371 while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r
9492e0b0 372 *p3 = *p1;\r
373 lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);\r
374 p3++;\r
375 p1++;\r
376 }\r
377 savestate = *p2;\r
3f7c993d 378 while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {\r
9492e0b0 379 *p4 = *p2;\r
380 lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);\r
381 p4++;\r
382 p2++;\r
383 }\r
384 }\r
385 else {\r
386 while (Compare16Bits(p1, p2) == -1) p1++;\r
387 while (Compare16Bits(p1, p2) == 1) p2++;\r
388 }\r
f397b5cc 389 }\r
7779d73c 390 *(uint64_t*)p3 = -1;\r
391 *(uint64_t*)p4 = -1;\r
3f7c993d 392 statelists[0].len = p3 - statelists[0].head.slhead;\r
393 statelists[1].len = p4 - statelists[1].head.slhead;\r
394 statelists[0].tail.sltail=--p3;\r
395 statelists[1].tail.sltail=--p4;\r
9492e0b0 396\r
397 // the statelists now contain possible keys. The key we are searching for must be in the\r
398 // intersection of both lists. Create the intersection:\r
7779d73c 399 qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compare_uint64);\r
400 qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compare_uint64);\r
401 statelists[0].len = intersection(statelists[0].head.keyhead, statelists[1].head.keyhead);\r
9492e0b0 402\r
403 memset(resultKey, 0, 6);\r
404 // The list may still contain several key candidates. Test each of them with mfCheckKeys\r
405 for (i = 0; i < statelists[0].len; i++) {\r
406 uint8_t keyBlock[6];\r
407 uint64_t key64;\r
3f7c993d 408 crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r
9492e0b0 409 num_to_bytes(key64, 6, keyBlock);\r
410 key64 = 0;\r
5330f532 411 if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, 1, keyBlock, &key64)) {\r
9492e0b0 412 num_to_bytes(key64, 6, resultKey);\r
413 break;\r
414 }\r
415 }\r
7906cb41 416\r
3f7c993d 417 free(statelists[0].head.slhead);\r
418 free(statelists[1].head.slhead);\r
7906cb41 419\r
f397b5cc
M
420 return 0;\r
421}\r
422\r
55acbb2a
M
423// EMULATOR\r
424\r
8556b852 425int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
545a1f38 426 UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
902cb3c0 427 SendCommand(&c);\r
3a05a1e7
OM
428\r
429 UsbCommand resp;\r
902cb3c0 430 if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\r
431 memcpy(data, resp.d.asBytes, blocksCount * 16);\r
8556b852
M
432 return 0;\r
433}\r
434\r
435int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
545a1f38 436 UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r
7906cb41 437 memcpy(c.d.asBytes, data, blocksCount * 16);\r
545a1f38 438 SendCommand(&c);\r
8556b852
M
439 return 0;\r
440}\r
441\r
55acbb2a
M
442// "MAGIC" CARD\r
443\r
7cb8516c 444int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
445 uint8_t isOK = 0;\r
3bba7dea 446\r
7cb8516c 447 UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};\r
448 SendCommand(&c);\r
3a05a1e7 449\r
14d76577 450 UsbCommand resp;\r
7cb8516c 451 if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
452 isOK = resp.arg[0] & 0xff;\r
453 memcpy(data, resp.d.asBytes, 16);\r
454 if (!isOK) return 2;\r
455 } else {\r
456 PrintAndLog("Command execute timeout");\r
457 return 1;\r
80b1b53f 458 }\r
7cb8516c 459 return 0;\r
f774db95
M
460}\r
461\r
6a1f2d82 462int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {\r
0675f200 463\r
3fe4ff4f 464 uint8_t isOK = 0;\r
465 UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r
7906cb41 466 memcpy(c.d.asBytes, data, 16);\r
545a1f38 467 SendCommand(&c);\r
3a05a1e7 468\r
14d76577 469 UsbCommand resp;\r
3a05a1e7 470 if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
902cb3c0 471 isOK = resp.arg[0] & 0xff;\r
7906cb41 472 if (uid != NULL)\r
80b1b53f 473 memcpy(uid, resp.d.asBytes, 4);\r
7906cb41 474 if (!isOK)\r
80b1b53f 475 return 2;\r
0675f200
M
476 } else {\r
477 PrintAndLog("Command execute timeout");\r
478 return 1;\r
479 }\r
3a05a1e7 480\r
0675f200
M
481 return 0;\r
482}\r
545a1f38 483\r
3a05a1e7
OM
484int mfCWipe(uint32_t numSectors, bool gen1b, bool wantWipe, bool wantFill) {\r
485 uint8_t isOK = 0;\r
486 uint8_t cmdParams = wantWipe + wantFill * 0x02 + gen1b * 0x04;\r
487 UsbCommand c = {CMD_MIFARE_CWIPE, {numSectors, cmdParams, 0}};\r
488 SendCommand(&c);\r
489\r
490 UsbCommand resp;\r
491 WaitForResponse(CMD_ACK,&resp);\r
492 isOK = resp.arg[0] & 0xff;\r
493 \r
494 return isOK;\r
495}\r
496\r
497int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID) {\r
7cb8516c 498 uint8_t oldblock0[16] = {0x00};\r
499 uint8_t block0[16] = {0x00};\r
3a05a1e7 500 int gen = 0, res;\r
7906cb41
F
501\r
502 gen = mfCIdentify();\r
503\r
3a05a1e7
OM
504 /* generation 1a magic card by default */\r
505 uint8_t cmdParams = CSETBLOCK_SINGLE_OPER;\r
7906cb41
F
506 if (gen == 2) {\r
507 /* generation 1b magic card */\r
3a05a1e7 508 cmdParams = CSETBLOCK_SINGLE_OPER | CSETBLOCK_MAGIC_1B;\r
7906cb41 509 }\r
3a05a1e7
OM
510 \r
511 res = mfCGetBlock(0, oldblock0, cmdParams);\r
545a1f38 512\r
3a05a1e7 513 if (res == 0) {\r
7cb8516c 514 memcpy(block0, oldblock0, 16);\r
515 PrintAndLog("old block 0: %s", sprint_hex(block0,16));\r
545a1f38 516 } else {\r
7cb8516c 517 PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");\r
545a1f38 518 }\r
7cb8516c 519\r
520 // fill in the new values\r
521 // UID\r
7906cb41 522 memcpy(block0, uid, 4);\r
7cb8516c 523 // Mifare UID BCC\r
3a05a1e7 524 block0[4] = block0[0] ^ block0[1] ^ block0[2] ^ block0[3];\r
7cb8516c 525 // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)\r
3a05a1e7
OM
526 if (sak != NULL)\r
527 block0[5] = sak[0];\r
528 if (atqa != NULL) {\r
529 block0[6] = atqa[1];\r
530 block0[7] = atqa[0];\r
7cb8516c 531 }\r
3a05a1e7 532 PrintAndLog("new block 0: %s", sprint_hex(block0, 16));\r
7906cb41 533\r
3a05a1e7
OM
534 res = mfCSetBlock(0, block0, oldUID, false, cmdParams);\r
535 if (res) {\r
536 PrintAndLog("Can't set block 0. Error: %d", res);\r
537 return res;\r
7906cb41 538 }\r
3a05a1e7
OM
539 \r
540 return 0;\r
541}\r
542\r
543int mfCIdentify()\r
544{\r
545 UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_CONNECT | ISO14A_NO_DISCONNECT, 0, 0}};\r
546 SendCommand(&c);\r
547\r
548 UsbCommand resp;\r
549 WaitForResponse(CMD_ACK,&resp);\r
550\r
c04a4b60 551 // iso14a_card_select_t card;\r
552 // memcpy(&card, (iso14a_card_select_t *)resp.d.asBytes, sizeof(iso14a_card_select_t));\r
553\r
554 // uint64_t select_status = resp.arg[0]; // 0: couldn't read, 1: OK, with ATS, 2: OK, no ATS, 3: proprietary Anticollision\r
555\r
556 // if(select_status != 0) {\r
557 // uint8_t rats[] = { 0xE0, 0x80 }; // FSDI=8 (FSD=256), CID=0\r
558 // c.arg[0] = ISO14A_RAW | ISO14A_APPEND_CRC | ISO14A_NO_DISCONNECT;\r
559 // c.arg[1] = 2;\r
560 // c.arg[2] = 0;\r
561 // memcpy(c.d.asBytes, rats, 2);\r
562 // SendCommand(&c);\r
563 // WaitForResponse(CMD_ACK,&resp);\r
564 // }\r
3a05a1e7
OM
565\r
566 c.cmd = CMD_MIFARE_CIDENT;\r
567 c.arg[0] = 0;\r
568 c.arg[1] = 0;\r
569 c.arg[2] = 0;\r
570 SendCommand(&c);\r
571 WaitForResponse(CMD_ACK,&resp);\r
572\r
573 uint8_t isGeneration = resp.arg[0] & 0xff;\r
574 switch( isGeneration ){\r
575 case 1: PrintAndLog("Chinese magic backdoor commands (GEN 1a) detected"); break;\r
576 case 2: PrintAndLog("Chinese magic backdoor command (GEN 1b) detected"); break;\r
577 default: PrintAndLog("No chinese magic backdoor command detected"); break;\r
578 }\r
579\r
580 // disconnect\r
581 c.cmd = CMD_READER_ISO_14443a;\r
582 c.arg[0] = 0;\r
583 c.arg[1] = 0;\r
584 c.arg[2] = 0;\r
585 SendCommand(&c);\r
586\r
587 return (int) isGeneration;\r
545a1f38 588}\r
55acbb2a 589\r
3a05a1e7 590\r
55acbb2a
M
591// SNIFFER\r
592\r
e0c635d1
M
593// constants\r
594static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
595\r
55acbb2a 596// variables\r
e4691591 597char logHexFileName[FILE_PATH_SIZE] = {0x00};\r
e0c635d1 598static uint8_t traceCard[4096] = {0x00};\r
e4691591 599static char traceFileName[FILE_PATH_SIZE] = {0x00};\r
55acbb2a
M
600static int traceState = TRACE_IDLE;\r
601static uint8_t traceCurBlock = 0;\r
602static uint8_t traceCurKey = 0;\r
603\r
604struct Crypto1State *traceCrypto1 = NULL;\r
605\r
606struct Crypto1State *revstate;\r
607uint64_t lfsr;\r
608uint32_t ks2;\r
609uint32_t ks3;\r
610\r
611uint32_t uid; // serial number\r
612uint32_t nt; // tag challenge\r
613uint32_t nr_enc; // encrypted reader challenge\r
614uint32_t ar_enc; // encrypted reader response\r
615uint32_t at_enc; // encrypted tag response\r
616\r
e0c635d1
M
617int isTraceCardEmpty(void) {\r
618 return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
619}\r
55acbb2a 620\r
e0c635d1 621int isBlockEmpty(int blockN) {\r
7906cb41 622 for (int i = 0; i < 16; i++)\r
e0c635d1 623 if (traceCard[blockN * 16 + i] != 0) return 0;\r
55acbb2a 624\r
e0c635d1
M
625 return 1;\r
626}\r
627\r
628int isBlockTrailer(int blockN) {\r
3a05a1e7 629 return ((blockN & 0x03) == 0x03);\r
e0c635d1
M
630}\r
631\r
7cb8516c 632int saveTraceCard(void) {\r
633 FILE * f;\r
7906cb41 634\r
7cb8516c 635 if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
7906cb41 636\r
7cb8516c 637 f = fopen(traceFileName, "w+");\r
638 if ( !f ) return 1;\r
7906cb41 639\r
7cb8516c 640 for (int i = 0; i < 64; i++) { // blocks\r
641 for (int j = 0; j < 16; j++) // bytes\r
7906cb41 642 fprintf(f, "%02x", *(traceCard + i * 16 + j));\r
7cb8516c 643 fprintf(f,"\n");\r
644 }\r
645 fclose(f);\r
646 return 0;\r
647}\r
648\r
e0c635d1
M
649int loadTraceCard(uint8_t *tuid) {\r
650 FILE * f;\r
80b1b53f 651 char buf[64] = {0x00};\r
652 uint8_t buf8[64] = {0x00};\r
e0c635d1 653 int i, blockNum;\r
7906cb41
F
654\r
655 if (!isTraceCardEmpty())\r
80b1b53f 656 saveTraceCard();\r
7906cb41 657\r
55acbb2a
M
658 memset(traceCard, 0x00, 4096);\r
659 memcpy(traceCard, tuid + 3, 4);\r
80b1b53f 660\r
e0c635d1
M
661 FillFileNameByUID(traceFileName, tuid, ".eml", 7);\r
662\r
663 f = fopen(traceFileName, "r");\r
e6432f05 664 if (!f) return 1;\r
7906cb41 665\r
e0c635d1 666 blockNum = 0;\r
7906cb41 667\r
e0c635d1 668 while(!feof(f)){\r
7906cb41 669\r
e0c635d1 670 memset(buf, 0, sizeof(buf));\r
759c16b3 671 if (fgets(buf, sizeof(buf), f) == NULL) {\r
ca4714cd
MHS
672 PrintAndLog("File reading error.");\r
673 fclose(f);\r
759c16b3 674 return 2;\r
ca4714cd 675 }\r
e0c635d1
M
676\r
677 if (strlen(buf) < 32){\r
678 if (feof(f)) break;\r
679 PrintAndLog("File content error. Block data must include 32 HEX symbols");\r
ca4714cd 680 fclose(f);\r
e0c635d1
M
681 return 2;\r
682 }\r
683 for (i = 0; i < 32; i += 2)\r
684 sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);\r
685\r
686 memcpy(traceCard + blockNum * 16, buf8, 16);\r
687\r
688 blockNum++;\r
689 }\r
690 fclose(f);\r
3a05a1e7 691\r
e0c635d1
M
692 return 0;\r
693}\r
694\r
e0c635d1
M
695int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r
696\r
7906cb41 697 if (traceCrypto1)\r
80b1b53f 698 crypto1_destroy(traceCrypto1);\r
699\r
e0c635d1
M
700 traceCrypto1 = NULL;\r
701\r
7906cb41 702 if (wantSaveToEmlFile)\r
80b1b53f 703 loadTraceCard(tuid);\r
7906cb41 704\r
55acbb2a
M
705 traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];\r
706 traceCard[5] = sak;\r
707 memcpy(&traceCard[6], atqa, 2);\r
708 traceCurBlock = 0;\r
709 uid = bytes_to_num(tuid + 3, 4);\r
7906cb41 710\r
55acbb2a 711 traceState = TRACE_IDLE;\r
3a05a1e7 712\r
55acbb2a
M
713 return 0;\r
714}\r
715\r
716void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){\r
717 uint8_t bt = 0;\r
718 int i;\r
7906cb41 719\r
55acbb2a
M
720 if (len != 1) {\r
721 for (i = 0; i < len; i++)\r
722 data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r
723 } else {\r
724 bt = 0;\r
725 for (i = 0; i < 4; i++)\r
726 bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;\r
7906cb41 727\r
55acbb2a
M
728 data[0] = bt;\r
729 }\r
730 return;\r
731}\r
732\r
733\r
6a1f2d82 734int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {\r
55acbb2a
M
735 uint8_t data[64];\r
736\r
737 if (traceState == TRACE_ERROR) return 1;\r
738 if (len > 64) {\r
739 traceState = TRACE_ERROR;\r
740 return 1;\r
741 }\r
7906cb41 742\r
55acbb2a
M
743 memcpy(data, data_src, len);\r
744 if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r
745 mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
746 PrintAndLog("dec> %s", sprint_hex(data, len));\r
7906cb41 747 AddLogHex(logHexFileName, "dec> ", data, len);\r
55acbb2a 748 }\r
7906cb41 749\r
55acbb2a 750 switch (traceState) {\r
7906cb41 751 case TRACE_IDLE:\r
8b6a93df
M
752 // check packet crc16!\r
753 if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {\r
754 PrintAndLog("dec> CRC ERROR!!!");\r
7906cb41 755 AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!");\r
8b6a93df
M
756 traceState = TRACE_ERROR; // do not decrypt the next commands\r
757 return 1;\r
758 }\r
7906cb41 759\r
55acbb2a
M
760 // AUTHENTICATION\r
761 if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {\r
762 traceState = TRACE_AUTH1;\r
763 traceCurBlock = data[1];\r
764 traceCurKey = data[0] == 60 ? 1:0;\r
765 return 0;\r
766 }\r
767\r
768 // READ\r
769 if ((len ==4) && ((data[0] == 0x30))) {\r
770 traceState = TRACE_READ_DATA;\r
771 traceCurBlock = data[1];\r
772 return 0;\r
773 }\r
774\r
775 // WRITE\r
776 if ((len ==4) && ((data[0] == 0xA0))) {\r
777 traceState = TRACE_WRITE_OK;\r
778 traceCurBlock = data[1];\r
779 return 0;\r
780 }\r
781\r
782 // HALT\r
783 if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {\r
784 traceState = TRACE_ERROR; // do not decrypt the next commands\r
785 return 0;\r
786 }\r
7906cb41 787\r
55acbb2a
M
788 return 0;\r
789 break;\r
7906cb41
F
790\r
791 case TRACE_READ_DATA:\r
55acbb2a
M
792 if (len == 18) {\r
793 traceState = TRACE_IDLE;\r
794\r
e0c635d1
M
795 if (isBlockTrailer(traceCurBlock)) {\r
796 memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);\r
797 } else {\r
798 memcpy(traceCard + traceCurBlock * 16, data, 16);\r
799 }\r
800 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
801 return 0;\r
802 } else {\r
803 traceState = TRACE_ERROR;\r
804 return 1;\r
805 }\r
806 break;\r
807\r
7906cb41 808 case TRACE_WRITE_OK:\r
97d582a6 809 if ((len == 1) && (data[0] == 0x0a)) {\r
55acbb2a
M
810 traceState = TRACE_WRITE_DATA;\r
811\r
812 return 0;\r
813 } else {\r
814 traceState = TRACE_ERROR;\r
815 return 1;\r
816 }\r
817 break;\r
818\r
7906cb41 819 case TRACE_WRITE_DATA:\r
55acbb2a
M
820 if (len == 18) {\r
821 traceState = TRACE_IDLE;\r
822\r
823 memcpy(traceCard + traceCurBlock * 16, data, 16);\r
e0c635d1 824 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
825 return 0;\r
826 } else {\r
827 traceState = TRACE_ERROR;\r
828 return 1;\r
829 }\r
830 break;\r
831\r
7906cb41 832 case TRACE_AUTH1:\r
55acbb2a
M
833 if (len == 4) {\r
834 traceState = TRACE_AUTH2;\r
55acbb2a
M
835 nt = bytes_to_num(data, 4);\r
836 return 0;\r
837 } else {\r
838 traceState = TRACE_ERROR;\r
839 return 1;\r
840 }\r
841 break;\r
842\r
7906cb41 843 case TRACE_AUTH2:\r
55acbb2a
M
844 if (len == 8) {\r
845 traceState = TRACE_AUTH_OK;\r
846\r
847 nr_enc = bytes_to_num(data, 4);\r
848 ar_enc = bytes_to_num(data + 4, 4);\r
849 return 0;\r
850 } else {\r
851 traceState = TRACE_ERROR;\r
852 return 1;\r
853 }\r
854 break;\r
855\r
7906cb41 856 case TRACE_AUTH_OK:\r
55acbb2a
M
857 if (len ==4) {\r
858 traceState = TRACE_IDLE;\r
859\r
860 at_enc = bytes_to_num(data, 4);\r
7906cb41 861\r
55acbb2a 862 // decode key here)\r
97d582a6
MHS
863 ks2 = ar_enc ^ prng_successor(nt, 64);\r
864 ks3 = at_enc ^ prng_successor(nt, 96);\r
865 revstate = lfsr_recovery64(ks2, ks3);\r
866 lfsr_rollback_word(revstate, 0, 0);\r
867 lfsr_rollback_word(revstate, 0, 0);\r
868 lfsr_rollback_word(revstate, nr_enc, 1);\r
869 lfsr_rollback_word(revstate, uid ^ nt, 0);\r
3fe4ff4f 870\r
55acbb2a
M
871 crypto1_get_lfsr(revstate, &lfsr);\r
872 printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));\r
7906cb41
F
873 AddLogUint64(logHexFileName, "key> ", lfsr);\r
874\r
e0c635d1
M
875 int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r
876 if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r
7906cb41 877\r
55acbb2a 878 if (traceCurKey) {\r
e0c635d1 879 num_to_bytes(lfsr, 6, traceCard + blockShift + 10);\r
55acbb2a 880 } else {\r
e0c635d1 881 num_to_bytes(lfsr, 6, traceCard + blockShift);\r
55acbb2a 882 }\r
e0c635d1 883 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
884\r
885 if (traceCrypto1) {\r
886 crypto1_destroy(traceCrypto1);\r
887 }\r
7906cb41 888\r
55acbb2a
M
889 // set cryptosystem state\r
890 traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
7906cb41 891\r
55acbb2a
M
892// nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt;\r
893\r
894 /* traceCrypto1 = crypto1_create(lfsr); // key in lfsr\r
895 crypto1_word(traceCrypto1, nt ^ uid, 0);\r
896 crypto1_word(traceCrypto1, ar, 1);\r
897 crypto1_word(traceCrypto1, 0, 0);\r
898 crypto1_word(traceCrypto1, 0, 0);*/\r
7906cb41 899\r
55acbb2a
M
900 return 0;\r
901 } else {\r
902 traceState = TRACE_ERROR;\r
903 return 1;\r
904 }\r
905 break;\r
906\r
7906cb41 907 default:\r
55acbb2a
M
908 traceState = TRACE_ERROR;\r
909 return 1;\r
910 }\r
911\r
912 return 0;\r
913}\r
1a5a73ab 914\r
3a05a1e7
OM
915// DECODING\r
916\r
1a5a73ab 917int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){\r
918 /*\r
919 uint32_t nt; // tag challenge\r
920 uint32_t ar_enc; // encrypted reader response\r
921 uint32_t at_enc; // encrypted tag response\r
922 */\r
923 if (traceCrypto1) {\r
924 crypto1_destroy(traceCrypto1);\r
925 }\r
926 ks2 = ar_enc ^ prng_successor(nt, 64);\r
927 ks3 = at_enc ^ prng_successor(nt, 96);\r
928 traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
929\r
930 mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
931\r
932 PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) );\r
933 crypto1_destroy(traceCrypto1);\r
934 return 0;\r
935}\r
7906cb41 936\r
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