hf mf mifare:
[proxmark3-svn] / client / mifarehost.c
CommitLineData
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
M
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
664e132f 76static uint32_t nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint32_t ar, uint64_t par_info, uint64_t ks_info, uint64_t **keys) {\r
7779d73c 77 struct Crypto1State *states;\r
664e132f 78 uint32_t i, pos;\r
7779d73c 79 uint8_t bt, ks3x[8], par[8][8];\r
80 uint64_t key_recovered;\r
664e132f 81 uint64_t *keylist;\r
7779d73c 82\r
83 // Reset the last three significant bits of the reader nonce\r
84 nr &= 0xffffff1f;\r
85\r
86 for (pos=0; pos<8; pos++) {\r
87 ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;\r
88 bt = (par_info >> (pos*8)) & 0xff;\r
89 for (i=0; i<8; i++) {\r
90 par[7-pos][i] = (bt >> i) & 0x01;\r
91 }\r
92 }\r
93\r
664e132f 94 states = lfsr_common_prefix(nr, ar, ks3x, par, (par_info == 0));\r
7779d73c 95\r
96 if (states == NULL) {\r
97 *keys = NULL;\r
98 return 0;\r
99 }\r
100\r
101 keylist = (uint64_t*)states;\r
7906cb41 102\r
7779d73c 103 for (i = 0; keylist[i]; i++) {\r
104 lfsr_rollback_word(states+i, uid^nt, 0);\r
105 crypto1_get_lfsr(states+i, &key_recovered);\r
106 keylist[i] = key_recovered;\r
107 }\r
108 keylist[i] = -1;\r
109\r
110 *keys = keylist;\r
111 return i;\r
112}\r
113\r
114\r
115int mfDarkside(uint64_t *key)\r
116{\r
117 uint32_t uid = 0;\r
664e132f 118 uint32_t nt = 0, nr = 0, ar = 0;\r
7779d73c 119 uint64_t par_list = 0, ks_list = 0;\r
120 uint64_t *keylist = NULL, *last_keylist = NULL;\r
121 uint32_t keycount = 0;\r
122 int16_t isOK = 0;\r
123\r
124 UsbCommand c = {CMD_READER_MIFARE, {true, 0, 0}};\r
125\r
126 // message\r
127 printf("-------------------------------------------------------------------------\n");\r
128 printf("Executing command. Expected execution time: 25sec on average\n");\r
129 printf("Press button on the proxmark3 device to abort both proxmark3 and client.\n");\r
130 printf("-------------------------------------------------------------------------\n");\r
131\r
7906cb41 132\r
7779d73c 133 while (true) {\r
134 clearCommandBuffer();\r
135 SendCommand(&c);\r
7906cb41 136\r
7779d73c 137 //flush queue\r
138 while (ukbhit()) {\r
139 int c = getchar(); (void) c;\r
140 }\r
7906cb41 141\r
7779d73c 142 // wait cycle\r
143 while (true) {\r
144 printf(".");\r
145 fflush(stdout);\r
146 if (ukbhit()) {\r
147 return -5;\r
148 break;\r
149 }\r
7906cb41 150\r
7779d73c 151 UsbCommand resp;\r
152 if (WaitForResponseTimeout(CMD_ACK, &resp, 1000)) {\r
153 isOK = resp.arg[0];\r
154 if (isOK < 0) {\r
155 return isOK;\r
156 }\r
157 uid = (uint32_t)bytes_to_num(resp.d.asBytes + 0, 4);\r
158 nt = (uint32_t)bytes_to_num(resp.d.asBytes + 4, 4);\r
159 par_list = bytes_to_num(resp.d.asBytes + 8, 8);\r
160 ks_list = bytes_to_num(resp.d.asBytes + 16, 8);\r
664e132f 161 nr = (uint32_t)bytes_to_num(resp.d.asBytes + 24, 4);\r
162 ar = (uint32_t)bytes_to_num(resp.d.asBytes + 28, 4);\r
7779d73c 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
7779d73c 169 }\r
170 c.arg[0] = false;\r
171\r
664e132f 172 keycount = nonce2key(uid, nt, nr, ar, par_list, ks_list, &keylist);\r
7779d73c 173\r
174 if (keycount == 0) {\r
7906cb41 175 PrintAndLog("Key not found (lfsr_common_prefix list is null). Nt=%08x", nt);\r
7779d73c 176 PrintAndLog("This is expected to happen in 25%% of all cases. Trying again with a different reader nonce...");\r
177 continue;\r
178 }\r
179\r
d86ee73d 180 if (par_list == 0) {\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
7779d73c 188 }\r
189\r
190 if (keycount > 1) {\r
191 PrintAndLog("Found %u possible keys. Trying to authenticate with each of them ...\n", keycount);\r
192 } else {\r
193 PrintAndLog("Found a possible key. Trying to authenticate...\n");\r
7906cb41 194 }\r
7779d73c 195\r
196 *key = -1;\r
197 uint8_t keyBlock[USB_CMD_DATA_SIZE];\r
198 int max_keys = USB_CMD_DATA_SIZE/6;\r
199 for (int i = 0; i < keycount; i += max_keys) {\r
200 int size = keycount - i > max_keys ? max_keys : keycount - i;\r
201 for (int j = 0; j < size; j++) {\r
d86ee73d 202 if (par_list == 0) {\r
02515642 203 num_to_bytes(last_keylist[i*max_keys + j], 6, keyBlock+(j*6));\r
d86ee73d 204 } else {\r
02515642 205 num_to_bytes(keylist[i*max_keys + j], 6, keyBlock+(j*6));\r
7779d73c 206 }\r
207 }\r
208 if (!mfCheckKeys(0, 0, false, size, keyBlock, key)) {\r
209 break;\r
210 }\r
7906cb41
F
211 }\r
212\r
7779d73c 213 if (*key != -1) {\r
214 free(last_keylist);\r
215 free(keylist);\r
216 break;\r
217 } else {\r
218 PrintAndLog("Authentication failed. Trying again...");\r
219 free(last_keylist);\r
220 last_keylist = keylist;\r
221 }\r
222 }\r
7906cb41 223\r
7779d73c 224 return 0;\r
225}\r
226\r
227\r
7cb8516c 228int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
229\r
84ca27b3 230 *key = -1;\r
7cb8516c 231\r
275d9e61 232 UsbCommand c = {CMD_MIFARE_CHKKEYS, {((blockNo & 0xff) | ((keyType & 0xff) << 8)), clear_trace, keycnt}}; \r
7cb8516c 233 memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
234 SendCommand(&c);\r
235\r
236 UsbCommand resp;\r
275d9e61 237 if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1; \r
7cb8516c 238 if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
239 *key = bytes_to_num(resp.d.asBytes, 6);\r
240 return 0;\r
241}\r
242\r
275d9e61
OM
243int mfCheckKeysSec(uint8_t sectorCnt, uint8_t keyType, uint8_t timeout14a, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, sector_t * e_sector){\r
244\r
245 uint8_t keyPtr = 0;\r
246\r
247 if (e_sector == NULL)\r
248 return -1;\r
249\r
250 UsbCommand c = {CMD_MIFARE_CHKKEYS, {((sectorCnt & 0xff) | ((keyType & 0xff) << 8)), (clear_trace | 0x02)|((timeout14a & 0xff) << 8), keycnt}}; \r
251 memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
252 SendCommand(&c);\r
253\r
254 UsbCommand resp;\r
255 if (!WaitForResponseTimeoutW(CMD_ACK, &resp, MAX(3000, 1000 + 13 * sectorCnt * keycnt * (keyType == 2 ? 2 : 1)), false)) return 1; // timeout: 13 ms / fail auth\r
256 if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
257 \r
258 bool foundAKey = false;\r
259 for(int sec = 0; sec < sectorCnt; sec++){\r
260 for(int keyAB = 0; keyAB < 2; keyAB++){\r
261 keyPtr = *(resp.d.asBytes + keyAB * 40 + sec);\r
262 if (keyPtr){\r
263 e_sector[sec].foundKey[keyAB] = true;\r
264 e_sector[sec].Key[keyAB] = bytes_to_num(keyBlock + (keyPtr - 1) * 6, 6);\r
265 foundAKey = true;\r
266 }\r
267 }\r
268 }\r
269 return foundAKey ? 0 : 3;\r
270}\r
271\r
9492e0b0 272// Compare 16 Bits out of cryptostate\r
273int Compare16Bits(const void * a, const void * b) {\r
274 if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;\r
275 else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;\r
276 else return -1;\r
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M
277}\r
278\r
7906cb41 279typedef\r
9492e0b0 280 struct {\r
281 union {\r
282 struct Crypto1State *slhead;\r
283 uint64_t *keyhead;\r
3f7c993d 284 } head;\r
9492e0b0 285 union {\r
286 struct Crypto1State *sltail;\r
287 uint64_t *keytail;\r
3f7c993d 288 } tail;\r
9492e0b0 289 uint32_t len;\r
290 uint32_t uid;\r
291 uint32_t blockNo;\r
292 uint32_t keyType;\r
293 uint32_t nt;\r
294 uint32_t ks1;\r
295 } StateList_t;\r
296\r
297\r
298// wrapper function for multi-threaded lfsr_recovery32\r
f921c113 299void\r
300#ifdef __has_attribute\r
301#if __has_attribute(force_align_arg_pointer)\r
302__attribute__((force_align_arg_pointer)) \r
303#endif\r
304#endif\r
305*nested_worker_thread(void *arg)\r
9492e0b0 306{\r
307 struct Crypto1State *p1;\r
308 StateList_t *statelist = arg;\r
309\r
3f7c993d 310 statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);\r
311 for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r
312 statelist->len = p1 - statelist->head.slhead;\r
313 statelist->tail.sltail = --p1;\r
314 qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r
7906cb41 315\r
3f7c993d 316 return statelist->head.slhead;\r
f397b5cc
M
317}\r
318\r
f921c113 319\r
7906cb41 320int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t *resultKey, bool calibrate)\r
f397b5cc 321{\r
dc8ba239 322 uint16_t i;\r
f397b5cc 323 uint32_t uid;\r
902cb3c0 324 UsbCommand resp;\r
f397b5cc 325\r
9492e0b0 326 StateList_t statelists[2];\r
327 struct Crypto1State *p1, *p2, *p3, *p4;\r
7906cb41 328\r
f397b5cc 329 // flush queue\r
dc8ba239 330 WaitForResponseTimeout(CMD_ACK, NULL, 100);\r
7906cb41 331\r
9492e0b0 332 UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r
f397b5cc 333 memcpy(c.d.asBytes, key, 6);\r
9492e0b0 334 SendCommand(&c);\r
f397b5cc 335\r
dc8ba239 336 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
337 return -1;\r
338 }\r
f397b5cc 339\r
dc8ba239 340 if (resp.arg[0]) {\r
341 return resp.arg[0]; // error during nested\r
342 }\r
7906cb41 343\r
dc8ba239 344 memcpy(&uid, resp.d.asBytes, 4);\r
345 PrintAndLog("uid:%08x trgbl=%d trgkey=%x", uid, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);\r
7906cb41 346\r
dc8ba239 347 for (i = 0; i < 2; i++) {\r
348 statelists[i].blockNo = resp.arg[2] & 0xff;\r
349 statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r
350 statelists[i].uid = uid;\r
351 memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r
352 memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r
f397b5cc 353 }\r
7906cb41 354\r
f397b5cc 355 // calc keys\r
7906cb41 356\r
9492e0b0 357 pthread_t thread_id[2];\r
7906cb41 358\r
9492e0b0 359 // create and run worker threads\r
360 for (i = 0; i < 2; i++) {\r
361 pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r
f397b5cc 362 }\r
7906cb41 363\r
9492e0b0 364 // wait for threads to terminate:\r
365 for (i = 0; i < 2; i++) {\r
3f7c993d 366 pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r
f397b5cc
M
367 }\r
368\r
f397b5cc 369\r
9492e0b0 370 // the first 16 Bits of the cryptostate already contain part of our key.\r
371 // Create the intersection of the two lists based on these 16 Bits and\r
372 // roll back the cryptostate\r
7906cb41 373 p1 = p3 = statelists[0].head.slhead;\r
3f7c993d 374 p2 = p4 = statelists[1].head.slhead;\r
375 while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r
9492e0b0 376 if (Compare16Bits(p1, p2) == 0) {\r
377 struct Crypto1State savestate, *savep = &savestate;\r
378 savestate = *p1;\r
3f7c993d 379 while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r
9492e0b0 380 *p3 = *p1;\r
381 lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);\r
382 p3++;\r
383 p1++;\r
384 }\r
385 savestate = *p2;\r
3f7c993d 386 while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {\r
9492e0b0 387 *p4 = *p2;\r
388 lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);\r
389 p4++;\r
390 p2++;\r
391 }\r
392 }\r
393 else {\r
394 while (Compare16Bits(p1, p2) == -1) p1++;\r
395 while (Compare16Bits(p1, p2) == 1) p2++;\r
396 }\r
f397b5cc 397 }\r
7779d73c 398 *(uint64_t*)p3 = -1;\r
399 *(uint64_t*)p4 = -1;\r
3f7c993d 400 statelists[0].len = p3 - statelists[0].head.slhead;\r
401 statelists[1].len = p4 - statelists[1].head.slhead;\r
402 statelists[0].tail.sltail=--p3;\r
403 statelists[1].tail.sltail=--p4;\r
9492e0b0 404\r
405 // the statelists now contain possible keys. The key we are searching for must be in the\r
406 // intersection of both lists. Create the intersection:\r
7779d73c 407 qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compare_uint64);\r
408 qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compare_uint64);\r
409 statelists[0].len = intersection(statelists[0].head.keyhead, statelists[1].head.keyhead);\r
9492e0b0 410\r
411 memset(resultKey, 0, 6);\r
412 // The list may still contain several key candidates. Test each of them with mfCheckKeys\r
413 for (i = 0; i < statelists[0].len; i++) {\r
414 uint8_t keyBlock[6];\r
415 uint64_t key64;\r
3f7c993d 416 crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r
9492e0b0 417 num_to_bytes(key64, 6, keyBlock);\r
418 key64 = 0;\r
5330f532 419 if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, 1, keyBlock, &key64)) {\r
9492e0b0 420 num_to_bytes(key64, 6, resultKey);\r
421 break;\r
422 }\r
423 }\r
7906cb41 424\r
3f7c993d 425 free(statelists[0].head.slhead);\r
426 free(statelists[1].head.slhead);\r
7906cb41 427\r
f397b5cc
M
428 return 0;\r
429}\r
430\r
55acbb2a
M
431// EMULATOR\r
432\r
8556b852 433int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
545a1f38 434 UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
902cb3c0 435 SendCommand(&c);\r
3a05a1e7
OM
436\r
437 UsbCommand resp;\r
902cb3c0 438 if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\r
439 memcpy(data, resp.d.asBytes, blocksCount * 16);\r
8556b852
M
440 return 0;\r
441}\r
442\r
443int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
545a1f38 444 UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r
7906cb41 445 memcpy(c.d.asBytes, data, blocksCount * 16);\r
545a1f38 446 SendCommand(&c);\r
8556b852
M
447 return 0;\r
448}\r
449\r
55acbb2a
M
450// "MAGIC" CARD\r
451\r
7cb8516c 452int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
453 uint8_t isOK = 0;\r
3bba7dea 454\r
7cb8516c 455 UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};\r
456 SendCommand(&c);\r
3a05a1e7 457\r
14d76577 458 UsbCommand resp;\r
7cb8516c 459 if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
460 isOK = resp.arg[0] & 0xff;\r
461 memcpy(data, resp.d.asBytes, 16);\r
462 if (!isOK) return 2;\r
463 } else {\r
464 PrintAndLog("Command execute timeout");\r
465 return 1;\r
80b1b53f 466 }\r
7cb8516c 467 return 0;\r
f774db95
M
468}\r
469\r
6a1f2d82 470int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {\r
0675f200 471\r
3fe4ff4f 472 uint8_t isOK = 0;\r
473 UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r
7906cb41 474 memcpy(c.d.asBytes, data, 16);\r
545a1f38 475 SendCommand(&c);\r
3a05a1e7 476\r
14d76577 477 UsbCommand resp;\r
3a05a1e7 478 if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
902cb3c0 479 isOK = resp.arg[0] & 0xff;\r
7906cb41 480 if (uid != NULL)\r
80b1b53f 481 memcpy(uid, resp.d.asBytes, 4);\r
7906cb41 482 if (!isOK)\r
80b1b53f 483 return 2;\r
0675f200
M
484 } else {\r
485 PrintAndLog("Command execute timeout");\r
486 return 1;\r
487 }\r
3a05a1e7 488\r
0675f200
M
489 return 0;\r
490}\r
545a1f38 491\r
3a05a1e7
OM
492int mfCWipe(uint32_t numSectors, bool gen1b, bool wantWipe, bool wantFill) {\r
493 uint8_t isOK = 0;\r
494 uint8_t cmdParams = wantWipe + wantFill * 0x02 + gen1b * 0x04;\r
495 UsbCommand c = {CMD_MIFARE_CWIPE, {numSectors, cmdParams, 0}};\r
496 SendCommand(&c);\r
497\r
498 UsbCommand resp;\r
499 WaitForResponse(CMD_ACK,&resp);\r
500 isOK = resp.arg[0] & 0xff;\r
501 \r
502 return isOK;\r
503}\r
504\r
505int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID) {\r
7cb8516c 506 uint8_t oldblock0[16] = {0x00};\r
507 uint8_t block0[16] = {0x00};\r
3a05a1e7 508 int gen = 0, res;\r
7906cb41
F
509\r
510 gen = mfCIdentify();\r
511\r
3a05a1e7
OM
512 /* generation 1a magic card by default */\r
513 uint8_t cmdParams = CSETBLOCK_SINGLE_OPER;\r
7906cb41
F
514 if (gen == 2) {\r
515 /* generation 1b magic card */\r
3a05a1e7 516 cmdParams = CSETBLOCK_SINGLE_OPER | CSETBLOCK_MAGIC_1B;\r
7906cb41 517 }\r
3a05a1e7
OM
518 \r
519 res = mfCGetBlock(0, oldblock0, cmdParams);\r
545a1f38 520\r
3a05a1e7 521 if (res == 0) {\r
7cb8516c 522 memcpy(block0, oldblock0, 16);\r
523 PrintAndLog("old block 0: %s", sprint_hex(block0,16));\r
545a1f38 524 } else {\r
7cb8516c 525 PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");\r
545a1f38 526 }\r
7cb8516c 527\r
528 // fill in the new values\r
529 // UID\r
7906cb41 530 memcpy(block0, uid, 4);\r
7cb8516c 531 // Mifare UID BCC\r
3a05a1e7 532 block0[4] = block0[0] ^ block0[1] ^ block0[2] ^ block0[3];\r
7cb8516c 533 // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)\r
3a05a1e7
OM
534 if (sak != NULL)\r
535 block0[5] = sak[0];\r
536 if (atqa != NULL) {\r
537 block0[6] = atqa[1];\r
538 block0[7] = atqa[0];\r
7cb8516c 539 }\r
3a05a1e7 540 PrintAndLog("new block 0: %s", sprint_hex(block0, 16));\r
7906cb41 541\r
3a05a1e7
OM
542 res = mfCSetBlock(0, block0, oldUID, false, cmdParams);\r
543 if (res) {\r
544 PrintAndLog("Can't set block 0. Error: %d", res);\r
545 return res;\r
7906cb41 546 }\r
3a05a1e7
OM
547 \r
548 return 0;\r
549}\r
550\r
e17660d5
OM
551int mfCIdentify() {\r
552 UsbCommand c = {CMD_MIFARE_CIDENT, {0, 0, 0}};\r
3a05a1e7 553 SendCommand(&c);\r
e17660d5 554 UsbCommand resp;\r
3a05a1e7
OM
555 WaitForResponse(CMD_ACK,&resp);\r
556\r
557 uint8_t isGeneration = resp.arg[0] & 0xff;\r
558 switch( isGeneration ){\r
559 case 1: PrintAndLog("Chinese magic backdoor commands (GEN 1a) detected"); break;\r
560 case 2: PrintAndLog("Chinese magic backdoor command (GEN 1b) detected"); break;\r
561 default: PrintAndLog("No chinese magic backdoor command detected"); break;\r
562 }\r
563\r
3a05a1e7 564 return (int) isGeneration;\r
545a1f38 565}\r
55acbb2a 566\r
3a05a1e7 567\r
55acbb2a
M
568// SNIFFER\r
569\r
e0c635d1
M
570// constants\r
571static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
572\r
55acbb2a 573// variables\r
e4691591 574char logHexFileName[FILE_PATH_SIZE] = {0x00};\r
e0c635d1 575static uint8_t traceCard[4096] = {0x00};\r
e4691591 576static char traceFileName[FILE_PATH_SIZE] = {0x00};\r
55acbb2a
M
577static int traceState = TRACE_IDLE;\r
578static uint8_t traceCurBlock = 0;\r
579static uint8_t traceCurKey = 0;\r
580\r
581struct Crypto1State *traceCrypto1 = NULL;\r
582\r
583struct Crypto1State *revstate;\r
584uint64_t lfsr;\r
585uint32_t ks2;\r
586uint32_t ks3;\r
587\r
588uint32_t uid; // serial number\r
589uint32_t nt; // tag challenge\r
590uint32_t nr_enc; // encrypted reader challenge\r
591uint32_t ar_enc; // encrypted reader response\r
592uint32_t at_enc; // encrypted tag response\r
593\r
e0c635d1
M
594int isTraceCardEmpty(void) {\r
595 return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
596}\r
55acbb2a 597\r
e0c635d1 598int isBlockEmpty(int blockN) {\r
7906cb41 599 for (int i = 0; i < 16; i++)\r
e0c635d1 600 if (traceCard[blockN * 16 + i] != 0) return 0;\r
55acbb2a 601\r
e0c635d1
M
602 return 1;\r
603}\r
604\r
605int isBlockTrailer(int blockN) {\r
3a05a1e7 606 return ((blockN & 0x03) == 0x03);\r
e0c635d1
M
607}\r
608\r
7cb8516c 609int saveTraceCard(void) {\r
610 FILE * f;\r
7906cb41 611\r
7cb8516c 612 if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
7906cb41 613\r
7cb8516c 614 f = fopen(traceFileName, "w+");\r
615 if ( !f ) return 1;\r
7906cb41 616\r
7cb8516c 617 for (int i = 0; i < 64; i++) { // blocks\r
618 for (int j = 0; j < 16; j++) // bytes\r
7906cb41 619 fprintf(f, "%02x", *(traceCard + i * 16 + j));\r
a0349483 620 if (i < 63)\r
621 fprintf(f,"\n");\r
7cb8516c 622 }\r
623 fclose(f);\r
624 return 0;\r
625}\r
626\r
e0c635d1
M
627int loadTraceCard(uint8_t *tuid) {\r
628 FILE * f;\r
80b1b53f 629 char buf[64] = {0x00};\r
630 uint8_t buf8[64] = {0x00};\r
e0c635d1 631 int i, blockNum;\r
7906cb41
F
632\r
633 if (!isTraceCardEmpty())\r
80b1b53f 634 saveTraceCard();\r
7906cb41 635\r
55acbb2a
M
636 memset(traceCard, 0x00, 4096);\r
637 memcpy(traceCard, tuid + 3, 4);\r
80b1b53f 638\r
e0c635d1
M
639 FillFileNameByUID(traceFileName, tuid, ".eml", 7);\r
640\r
641 f = fopen(traceFileName, "r");\r
e6432f05 642 if (!f) return 1;\r
7906cb41 643\r
e0c635d1 644 blockNum = 0;\r
7906cb41 645\r
e0c635d1 646 while(!feof(f)){\r
7906cb41 647\r
e0c635d1 648 memset(buf, 0, sizeof(buf));\r
759c16b3 649 if (fgets(buf, sizeof(buf), f) == NULL) {\r
ca4714cd
MHS
650 PrintAndLog("File reading error.");\r
651 fclose(f);\r
759c16b3 652 return 2;\r
ca4714cd 653 }\r
e0c635d1
M
654\r
655 if (strlen(buf) < 32){\r
656 if (feof(f)) break;\r
657 PrintAndLog("File content error. Block data must include 32 HEX symbols");\r
ca4714cd 658 fclose(f);\r
e0c635d1
M
659 return 2;\r
660 }\r
661 for (i = 0; i < 32; i += 2)\r
662 sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);\r
663\r
664 memcpy(traceCard + blockNum * 16, buf8, 16);\r
665\r
666 blockNum++;\r
667 }\r
668 fclose(f);\r
3a05a1e7 669\r
e0c635d1
M
670 return 0;\r
671}\r
672\r
e0c635d1
M
673int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r
674\r
7906cb41 675 if (traceCrypto1)\r
80b1b53f 676 crypto1_destroy(traceCrypto1);\r
677\r
e0c635d1
M
678 traceCrypto1 = NULL;\r
679\r
7906cb41 680 if (wantSaveToEmlFile)\r
80b1b53f 681 loadTraceCard(tuid);\r
7906cb41 682\r
55acbb2a
M
683 traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];\r
684 traceCard[5] = sak;\r
685 memcpy(&traceCard[6], atqa, 2);\r
686 traceCurBlock = 0;\r
687 uid = bytes_to_num(tuid + 3, 4);\r
7906cb41 688\r
55acbb2a 689 traceState = TRACE_IDLE;\r
3a05a1e7 690\r
55acbb2a
M
691 return 0;\r
692}\r
693\r
694void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){\r
695 uint8_t bt = 0;\r
696 int i;\r
7906cb41 697\r
55acbb2a
M
698 if (len != 1) {\r
699 for (i = 0; i < len; i++)\r
700 data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r
701 } else {\r
702 bt = 0;\r
703 for (i = 0; i < 4; i++)\r
704 bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;\r
7906cb41 705\r
55acbb2a
M
706 data[0] = bt;\r
707 }\r
708 return;\r
709}\r
710\r
711\r
6a1f2d82 712int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {\r
55acbb2a
M
713 uint8_t data[64];\r
714\r
715 if (traceState == TRACE_ERROR) return 1;\r
716 if (len > 64) {\r
717 traceState = TRACE_ERROR;\r
718 return 1;\r
719 }\r
7906cb41 720\r
55acbb2a
M
721 memcpy(data, data_src, len);\r
722 if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r
723 mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
724 PrintAndLog("dec> %s", sprint_hex(data, len));\r
7906cb41 725 AddLogHex(logHexFileName, "dec> ", data, len);\r
55acbb2a 726 }\r
7906cb41 727\r
55acbb2a 728 switch (traceState) {\r
7906cb41 729 case TRACE_IDLE:\r
8b6a93df
M
730 // check packet crc16!\r
731 if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {\r
732 PrintAndLog("dec> CRC ERROR!!!");\r
7906cb41 733 AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!");\r
8b6a93df
M
734 traceState = TRACE_ERROR; // do not decrypt the next commands\r
735 return 1;\r
736 }\r
7906cb41 737\r
55acbb2a
M
738 // AUTHENTICATION\r
739 if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {\r
740 traceState = TRACE_AUTH1;\r
741 traceCurBlock = data[1];\r
742 traceCurKey = data[0] == 60 ? 1:0;\r
743 return 0;\r
744 }\r
745\r
746 // READ\r
747 if ((len ==4) && ((data[0] == 0x30))) {\r
748 traceState = TRACE_READ_DATA;\r
749 traceCurBlock = data[1];\r
750 return 0;\r
751 }\r
752\r
753 // WRITE\r
754 if ((len ==4) && ((data[0] == 0xA0))) {\r
755 traceState = TRACE_WRITE_OK;\r
756 traceCurBlock = data[1];\r
757 return 0;\r
758 }\r
759\r
760 // HALT\r
761 if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {\r
762 traceState = TRACE_ERROR; // do not decrypt the next commands\r
763 return 0;\r
764 }\r
7906cb41 765\r
55acbb2a
M
766 return 0;\r
767 break;\r
7906cb41
F
768\r
769 case TRACE_READ_DATA:\r
55acbb2a
M
770 if (len == 18) {\r
771 traceState = TRACE_IDLE;\r
772\r
e0c635d1
M
773 if (isBlockTrailer(traceCurBlock)) {\r
774 memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);\r
775 } else {\r
776 memcpy(traceCard + traceCurBlock * 16, data, 16);\r
777 }\r
778 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
779 return 0;\r
780 } else {\r
781 traceState = TRACE_ERROR;\r
782 return 1;\r
783 }\r
784 break;\r
785\r
7906cb41 786 case TRACE_WRITE_OK:\r
97d582a6 787 if ((len == 1) && (data[0] == 0x0a)) {\r
55acbb2a
M
788 traceState = TRACE_WRITE_DATA;\r
789\r
790 return 0;\r
791 } else {\r
792 traceState = TRACE_ERROR;\r
793 return 1;\r
794 }\r
795 break;\r
796\r
7906cb41 797 case TRACE_WRITE_DATA:\r
55acbb2a
M
798 if (len == 18) {\r
799 traceState = TRACE_IDLE;\r
800\r
801 memcpy(traceCard + traceCurBlock * 16, data, 16);\r
e0c635d1 802 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
803 return 0;\r
804 } else {\r
805 traceState = TRACE_ERROR;\r
806 return 1;\r
807 }\r
808 break;\r
809\r
7906cb41 810 case TRACE_AUTH1:\r
55acbb2a
M
811 if (len == 4) {\r
812 traceState = TRACE_AUTH2;\r
55acbb2a
M
813 nt = bytes_to_num(data, 4);\r
814 return 0;\r
815 } else {\r
816 traceState = TRACE_ERROR;\r
817 return 1;\r
818 }\r
819 break;\r
820\r
7906cb41 821 case TRACE_AUTH2:\r
55acbb2a
M
822 if (len == 8) {\r
823 traceState = TRACE_AUTH_OK;\r
824\r
825 nr_enc = bytes_to_num(data, 4);\r
826 ar_enc = bytes_to_num(data + 4, 4);\r
827 return 0;\r
828 } else {\r
829 traceState = TRACE_ERROR;\r
830 return 1;\r
831 }\r
832 break;\r
833\r
7906cb41 834 case TRACE_AUTH_OK:\r
55acbb2a
M
835 if (len ==4) {\r
836 traceState = TRACE_IDLE;\r
837\r
2ba37081 838 if (!traceCrypto1) {\r
839 at_enc = bytes_to_num(data, 4);\r
840\r
841 // decode key here)\r
842 ks2 = ar_enc ^ prng_successor(nt, 64);\r
843 ks3 = at_enc ^ prng_successor(nt, 96);\r
844 revstate = lfsr_recovery64(ks2, ks3);\r
845 lfsr_rollback_word(revstate, 0, 0);\r
846 lfsr_rollback_word(revstate, 0, 0);\r
847 lfsr_rollback_word(revstate, nr_enc, 1);\r
848 lfsr_rollback_word(revstate, uid ^ nt, 0);\r
849\r
850 crypto1_get_lfsr(revstate, &lfsr);\r
851 printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));\r
852 AddLogUint64(logHexFileName, "key> ", lfsr);\r
853 } else {\r
854 printf("key> nested not implemented!\n");\r
855 at_enc = bytes_to_num(data, 4);\r
856 \r
857 crypto1_destroy(traceCrypto1);\r
3fe4ff4f 858\r
2ba37081 859 // not implemented\r
860 traceState = TRACE_ERROR;\r
861 }\r
7906cb41 862\r
e0c635d1
M
863 int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r
864 if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r
7906cb41 865\r
55acbb2a 866 if (traceCurKey) {\r
e0c635d1 867 num_to_bytes(lfsr, 6, traceCard + blockShift + 10);\r
55acbb2a 868 } else {\r
e0c635d1 869 num_to_bytes(lfsr, 6, traceCard + blockShift);\r
55acbb2a 870 }\r
e0c635d1 871 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
872\r
873 if (traceCrypto1) {\r
874 crypto1_destroy(traceCrypto1);\r
875 }\r
7906cb41 876\r
55acbb2a
M
877 // set cryptosystem state\r
878 traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
55acbb2a
M
879 return 0;\r
880 } else {\r
881 traceState = TRACE_ERROR;\r
882 return 1;\r
883 }\r
884 break;\r
885\r
7906cb41 886 default:\r
55acbb2a
M
887 traceState = TRACE_ERROR;\r
888 return 1;\r
889 }\r
890\r
891 return 0;\r
892}\r
1a5a73ab 893\r
3a05a1e7
OM
894// DECODING\r
895\r
1a5a73ab 896int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){\r
897 /*\r
898 uint32_t nt; // tag challenge\r
899 uint32_t ar_enc; // encrypted reader response\r
900 uint32_t at_enc; // encrypted tag response\r
901 */\r
902 if (traceCrypto1) {\r
903 crypto1_destroy(traceCrypto1);\r
904 }\r
905 ks2 = ar_enc ^ prng_successor(nt, 64);\r
906 ks3 = at_enc ^ prng_successor(nt, 96);\r
907 traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
908\r
909 mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
910\r
911 PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) );\r
912 crypto1_destroy(traceCrypto1);\r
913 return 0;\r
914}\r
7906cb41 915\r
fe6bf3c5
OM
916/** validate_prng_nonce\r
917 * Determine if nonce is deterministic. ie: Suspectable to Darkside attack.\r
918 * returns\r
919 * true = weak prng\r
920 * false = hardend prng\r
921 */\r
922bool validate_prng_nonce(uint32_t nonce) {\r
923 uint16_t *dist = 0;\r
924 uint16_t x, i;\r
925\r
926 dist = malloc(2 << 16);\r
927 if(!dist)\r
928 return -1;\r
929\r
930 // init prng table:\r
931 for (x = i = 1; i; ++i) {\r
932 dist[(x & 0xff) << 8 | x >> 8] = i;\r
933 x = x >> 1 | (x ^ x >> 2 ^ x >> 3 ^ x >> 5) << 15;\r
934 }\r
935 \r
936 uint32_t res = (65535 - dist[nonce >> 16] + dist[nonce & 0xffff]) % 65535;\r
937 \r
938 free(dist); \r
939 return (res == 16);\r
940}\r
941\r
942/* Detect Tag Prng, \r
943* function performs a partial AUTH, where it tries to authenticate against block0, key A, but only collects tag nonce.\r
944* the tag nonce is check to see if it has a predictable PRNG.\r
945* @returns \r
946* TRUE if tag uses WEAK prng (ie Now the NACK bug also needs to be present for Darkside attack)\r
947* FALSE is tag uses HARDEND prng (ie hardnested attack possible, with known key)\r
948*/\r
949int DetectClassicPrng(void){\r
950\r
951 UsbCommand resp, respA; \r
952 uint8_t cmd[] = {0x60, 0x00}; // MIFARE_AUTH_KEYA\r
953 uint32_t flags = ISO14A_CONNECT | ISO14A_RAW | ISO14A_APPEND_CRC | ISO14A_NO_RATS;\r
954 \r
955 UsbCommand c = {CMD_READER_ISO_14443a, {flags, sizeof(cmd), 0}};\r
956 memcpy(c.d.asBytes, cmd, sizeof(cmd));\r
957\r
958 clearCommandBuffer();\r
959 SendCommand(&c);\r
960 if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {\r
961 PrintAndLog("PRNG UID: Reply timeout.");\r
962 return -1;\r
963 }\r
964 \r
965 // if select tag failed.\r
966 if (resp.arg[0] == 0) {\r
967 PrintAndLog("PRNG error: selecting tag failed, can't detect prng.");\r
968 return -1;\r
969 }\r
970 \r
971 if (!WaitForResponseTimeout(CMD_ACK, &respA, 5000)) {\r
972 PrintAndLog("PRNG data: Reply timeout.");\r
973 return -1;\r
974 }\r
975\r
976 // check respA\r
977 if (respA.arg[0] != 4) {\r
978 PrintAndLog("PRNG data error: Wrong length: %d", respA.arg[0]);\r
979 return -1;\r
980 }\r
981\r
982 uint32_t nonce = bytes_to_num(respA.d.asBytes, respA.arg[0]);\r
983 return validate_prng_nonce(nonce);\r
984}\r
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