add force_align_arg_pointer attribute to all callback functions
[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
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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
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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
f921c113 298void\r
299#ifdef __has_attribute\r
300#if __has_attribute(force_align_arg_pointer)\r
301__attribute__((force_align_arg_pointer)) \r
302#endif\r
303#endif\r
304*nested_worker_thread(void *arg)\r
9492e0b0 305{\r
306 struct Crypto1State *p1;\r
307 StateList_t *statelist = arg;\r
308\r
3f7c993d 309 statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);\r
310 for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r
311 statelist->len = p1 - statelist->head.slhead;\r
312 statelist->tail.sltail = --p1;\r
313 qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r
7906cb41 314\r
3f7c993d 315 return statelist->head.slhead;\r
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316}\r
317\r
f921c113 318\r
7906cb41 319int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t *resultKey, bool calibrate)\r
f397b5cc 320{\r
dc8ba239 321 uint16_t i;\r
f397b5cc 322 uint32_t uid;\r
902cb3c0 323 UsbCommand resp;\r
f397b5cc 324\r
9492e0b0 325 StateList_t statelists[2];\r
326 struct Crypto1State *p1, *p2, *p3, *p4;\r
7906cb41 327\r
f397b5cc 328 // flush queue\r
dc8ba239 329 WaitForResponseTimeout(CMD_ACK, NULL, 100);\r
7906cb41 330\r
9492e0b0 331 UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r
f397b5cc 332 memcpy(c.d.asBytes, key, 6);\r
9492e0b0 333 SendCommand(&c);\r
f397b5cc 334\r
dc8ba239 335 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
336 return -1;\r
337 }\r
f397b5cc 338\r
dc8ba239 339 if (resp.arg[0]) {\r
340 return resp.arg[0]; // error during nested\r
341 }\r
7906cb41 342\r
dc8ba239 343 memcpy(&uid, resp.d.asBytes, 4);\r
344 PrintAndLog("uid:%08x trgbl=%d trgkey=%x", uid, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);\r
7906cb41 345\r
dc8ba239 346 for (i = 0; i < 2; i++) {\r
347 statelists[i].blockNo = resp.arg[2] & 0xff;\r
348 statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r
349 statelists[i].uid = uid;\r
350 memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r
351 memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r
f397b5cc 352 }\r
7906cb41 353\r
f397b5cc 354 // calc keys\r
7906cb41 355\r
9492e0b0 356 pthread_t thread_id[2];\r
7906cb41 357\r
9492e0b0 358 // create and run worker threads\r
359 for (i = 0; i < 2; i++) {\r
360 pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r
f397b5cc 361 }\r
7906cb41 362\r
9492e0b0 363 // wait for threads to terminate:\r
364 for (i = 0; i < 2; i++) {\r
3f7c993d 365 pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r
f397b5cc
M
366 }\r
367\r
f397b5cc 368\r
9492e0b0 369 // the first 16 Bits of the cryptostate already contain part of our key.\r
370 // Create the intersection of the two lists based on these 16 Bits and\r
371 // roll back the cryptostate\r
7906cb41 372 p1 = p3 = statelists[0].head.slhead;\r
3f7c993d 373 p2 = p4 = statelists[1].head.slhead;\r
374 while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r
9492e0b0 375 if (Compare16Bits(p1, p2) == 0) {\r
376 struct Crypto1State savestate, *savep = &savestate;\r
377 savestate = *p1;\r
3f7c993d 378 while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r
9492e0b0 379 *p3 = *p1;\r
380 lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);\r
381 p3++;\r
382 p1++;\r
383 }\r
384 savestate = *p2;\r
3f7c993d 385 while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {\r
9492e0b0 386 *p4 = *p2;\r
387 lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);\r
388 p4++;\r
389 p2++;\r
390 }\r
391 }\r
392 else {\r
393 while (Compare16Bits(p1, p2) == -1) p1++;\r
394 while (Compare16Bits(p1, p2) == 1) p2++;\r
395 }\r
f397b5cc 396 }\r
7779d73c 397 *(uint64_t*)p3 = -1;\r
398 *(uint64_t*)p4 = -1;\r
3f7c993d 399 statelists[0].len = p3 - statelists[0].head.slhead;\r
400 statelists[1].len = p4 - statelists[1].head.slhead;\r
401 statelists[0].tail.sltail=--p3;\r
402 statelists[1].tail.sltail=--p4;\r
9492e0b0 403\r
404 // the statelists now contain possible keys. The key we are searching for must be in the\r
405 // intersection of both lists. Create the intersection:\r
7779d73c 406 qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compare_uint64);\r
407 qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compare_uint64);\r
408 statelists[0].len = intersection(statelists[0].head.keyhead, statelists[1].head.keyhead);\r
9492e0b0 409\r
410 memset(resultKey, 0, 6);\r
411 // The list may still contain several key candidates. Test each of them with mfCheckKeys\r
412 for (i = 0; i < statelists[0].len; i++) {\r
413 uint8_t keyBlock[6];\r
414 uint64_t key64;\r
3f7c993d 415 crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r
9492e0b0 416 num_to_bytes(key64, 6, keyBlock);\r
417 key64 = 0;\r
5330f532 418 if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, 1, keyBlock, &key64)) {\r
9492e0b0 419 num_to_bytes(key64, 6, resultKey);\r
420 break;\r
421 }\r
422 }\r
7906cb41 423\r
3f7c993d 424 free(statelists[0].head.slhead);\r
425 free(statelists[1].head.slhead);\r
7906cb41 426\r
f397b5cc
M
427 return 0;\r
428}\r
429\r
55acbb2a
M
430// EMULATOR\r
431\r
8556b852 432int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
545a1f38 433 UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
902cb3c0 434 SendCommand(&c);\r
3a05a1e7
OM
435\r
436 UsbCommand resp;\r
902cb3c0 437 if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\r
438 memcpy(data, resp.d.asBytes, blocksCount * 16);\r
8556b852
M
439 return 0;\r
440}\r
441\r
442int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
545a1f38 443 UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r
7906cb41 444 memcpy(c.d.asBytes, data, blocksCount * 16);\r
545a1f38 445 SendCommand(&c);\r
8556b852
M
446 return 0;\r
447}\r
448\r
55acbb2a
M
449// "MAGIC" CARD\r
450\r
7cb8516c 451int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
452 uint8_t isOK = 0;\r
3bba7dea 453\r
7cb8516c 454 UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};\r
455 SendCommand(&c);\r
3a05a1e7 456\r
14d76577 457 UsbCommand resp;\r
7cb8516c 458 if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
459 isOK = resp.arg[0] & 0xff;\r
460 memcpy(data, resp.d.asBytes, 16);\r
461 if (!isOK) return 2;\r
462 } else {\r
463 PrintAndLog("Command execute timeout");\r
464 return 1;\r
80b1b53f 465 }\r
7cb8516c 466 return 0;\r
f774db95
M
467}\r
468\r
6a1f2d82 469int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {\r
0675f200 470\r
3fe4ff4f 471 uint8_t isOK = 0;\r
472 UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r
7906cb41 473 memcpy(c.d.asBytes, data, 16);\r
545a1f38 474 SendCommand(&c);\r
3a05a1e7 475\r
14d76577 476 UsbCommand resp;\r
3a05a1e7 477 if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
902cb3c0 478 isOK = resp.arg[0] & 0xff;\r
7906cb41 479 if (uid != NULL)\r
80b1b53f 480 memcpy(uid, resp.d.asBytes, 4);\r
7906cb41 481 if (!isOK)\r
80b1b53f 482 return 2;\r
0675f200
M
483 } else {\r
484 PrintAndLog("Command execute timeout");\r
485 return 1;\r
486 }\r
3a05a1e7 487\r
0675f200
M
488 return 0;\r
489}\r
545a1f38 490\r
3a05a1e7
OM
491int mfCWipe(uint32_t numSectors, bool gen1b, bool wantWipe, bool wantFill) {\r
492 uint8_t isOK = 0;\r
493 uint8_t cmdParams = wantWipe + wantFill * 0x02 + gen1b * 0x04;\r
494 UsbCommand c = {CMD_MIFARE_CWIPE, {numSectors, cmdParams, 0}};\r
495 SendCommand(&c);\r
496\r
497 UsbCommand resp;\r
498 WaitForResponse(CMD_ACK,&resp);\r
499 isOK = resp.arg[0] & 0xff;\r
500 \r
501 return isOK;\r
502}\r
503\r
504int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID) {\r
7cb8516c 505 uint8_t oldblock0[16] = {0x00};\r
506 uint8_t block0[16] = {0x00};\r
3a05a1e7 507 int gen = 0, res;\r
7906cb41
F
508\r
509 gen = mfCIdentify();\r
510\r
3a05a1e7
OM
511 /* generation 1a magic card by default */\r
512 uint8_t cmdParams = CSETBLOCK_SINGLE_OPER;\r
7906cb41
F
513 if (gen == 2) {\r
514 /* generation 1b magic card */\r
3a05a1e7 515 cmdParams = CSETBLOCK_SINGLE_OPER | CSETBLOCK_MAGIC_1B;\r
7906cb41 516 }\r
3a05a1e7
OM
517 \r
518 res = mfCGetBlock(0, oldblock0, cmdParams);\r
545a1f38 519\r
3a05a1e7 520 if (res == 0) {\r
7cb8516c 521 memcpy(block0, oldblock0, 16);\r
522 PrintAndLog("old block 0: %s", sprint_hex(block0,16));\r
545a1f38 523 } else {\r
7cb8516c 524 PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");\r
545a1f38 525 }\r
7cb8516c 526\r
527 // fill in the new values\r
528 // UID\r
7906cb41 529 memcpy(block0, uid, 4);\r
7cb8516c 530 // Mifare UID BCC\r
3a05a1e7 531 block0[4] = block0[0] ^ block0[1] ^ block0[2] ^ block0[3];\r
7cb8516c 532 // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)\r
3a05a1e7
OM
533 if (sak != NULL)\r
534 block0[5] = sak[0];\r
535 if (atqa != NULL) {\r
536 block0[6] = atqa[1];\r
537 block0[7] = atqa[0];\r
7cb8516c 538 }\r
3a05a1e7 539 PrintAndLog("new block 0: %s", sprint_hex(block0, 16));\r
7906cb41 540\r
3a05a1e7
OM
541 res = mfCSetBlock(0, block0, oldUID, false, cmdParams);\r
542 if (res) {\r
543 PrintAndLog("Can't set block 0. Error: %d", res);\r
544 return res;\r
7906cb41 545 }\r
3a05a1e7
OM
546 \r
547 return 0;\r
548}\r
549\r
e17660d5
OM
550int mfCIdentify() {\r
551 UsbCommand c = {CMD_MIFARE_CIDENT, {0, 0, 0}};\r
3a05a1e7 552 SendCommand(&c);\r
e17660d5 553 UsbCommand resp;\r
3a05a1e7
OM
554 WaitForResponse(CMD_ACK,&resp);\r
555\r
556 uint8_t isGeneration = resp.arg[0] & 0xff;\r
557 switch( isGeneration ){\r
558 case 1: PrintAndLog("Chinese magic backdoor commands (GEN 1a) detected"); break;\r
559 case 2: PrintAndLog("Chinese magic backdoor command (GEN 1b) detected"); break;\r
560 default: PrintAndLog("No chinese magic backdoor command detected"); break;\r
561 }\r
562\r
3a05a1e7 563 return (int) isGeneration;\r
545a1f38 564}\r
55acbb2a 565\r
3a05a1e7 566\r
55acbb2a
M
567// SNIFFER\r
568\r
e0c635d1
M
569// constants\r
570static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
571\r
55acbb2a 572// variables\r
e4691591 573char logHexFileName[FILE_PATH_SIZE] = {0x00};\r
e0c635d1 574static uint8_t traceCard[4096] = {0x00};\r
e4691591 575static char traceFileName[FILE_PATH_SIZE] = {0x00};\r
55acbb2a
M
576static int traceState = TRACE_IDLE;\r
577static uint8_t traceCurBlock = 0;\r
578static uint8_t traceCurKey = 0;\r
579\r
580struct Crypto1State *traceCrypto1 = NULL;\r
581\r
582struct Crypto1State *revstate;\r
583uint64_t lfsr;\r
584uint32_t ks2;\r
585uint32_t ks3;\r
586\r
587uint32_t uid; // serial number\r
588uint32_t nt; // tag challenge\r
589uint32_t nr_enc; // encrypted reader challenge\r
590uint32_t ar_enc; // encrypted reader response\r
591uint32_t at_enc; // encrypted tag response\r
592\r
e0c635d1
M
593int isTraceCardEmpty(void) {\r
594 return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
595}\r
55acbb2a 596\r
e0c635d1 597int isBlockEmpty(int blockN) {\r
7906cb41 598 for (int i = 0; i < 16; i++)\r
e0c635d1 599 if (traceCard[blockN * 16 + i] != 0) return 0;\r
55acbb2a 600\r
e0c635d1
M
601 return 1;\r
602}\r
603\r
604int isBlockTrailer(int blockN) {\r
3a05a1e7 605 return ((blockN & 0x03) == 0x03);\r
e0c635d1
M
606}\r
607\r
7cb8516c 608int saveTraceCard(void) {\r
609 FILE * f;\r
7906cb41 610\r
7cb8516c 611 if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
7906cb41 612\r
7cb8516c 613 f = fopen(traceFileName, "w+");\r
614 if ( !f ) return 1;\r
7906cb41 615\r
7cb8516c 616 for (int i = 0; i < 64; i++) { // blocks\r
617 for (int j = 0; j < 16; j++) // bytes\r
7906cb41 618 fprintf(f, "%02x", *(traceCard + i * 16 + j));\r
a0349483 619 if (i < 63)\r
620 fprintf(f,"\n");\r
7cb8516c 621 }\r
622 fclose(f);\r
623 return 0;\r
624}\r
625\r
e0c635d1
M
626int loadTraceCard(uint8_t *tuid) {\r
627 FILE * f;\r
80b1b53f 628 char buf[64] = {0x00};\r
629 uint8_t buf8[64] = {0x00};\r
e0c635d1 630 int i, blockNum;\r
7906cb41
F
631\r
632 if (!isTraceCardEmpty())\r
80b1b53f 633 saveTraceCard();\r
7906cb41 634\r
55acbb2a
M
635 memset(traceCard, 0x00, 4096);\r
636 memcpy(traceCard, tuid + 3, 4);\r
80b1b53f 637\r
e0c635d1
M
638 FillFileNameByUID(traceFileName, tuid, ".eml", 7);\r
639\r
640 f = fopen(traceFileName, "r");\r
e6432f05 641 if (!f) return 1;\r
7906cb41 642\r
e0c635d1 643 blockNum = 0;\r
7906cb41 644\r
e0c635d1 645 while(!feof(f)){\r
7906cb41 646\r
e0c635d1 647 memset(buf, 0, sizeof(buf));\r
759c16b3 648 if (fgets(buf, sizeof(buf), f) == NULL) {\r
ca4714cd
MHS
649 PrintAndLog("File reading error.");\r
650 fclose(f);\r
759c16b3 651 return 2;\r
ca4714cd 652 }\r
e0c635d1
M
653\r
654 if (strlen(buf) < 32){\r
655 if (feof(f)) break;\r
656 PrintAndLog("File content error. Block data must include 32 HEX symbols");\r
ca4714cd 657 fclose(f);\r
e0c635d1
M
658 return 2;\r
659 }\r
660 for (i = 0; i < 32; i += 2)\r
661 sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);\r
662\r
663 memcpy(traceCard + blockNum * 16, buf8, 16);\r
664\r
665 blockNum++;\r
666 }\r
667 fclose(f);\r
3a05a1e7 668\r
e0c635d1
M
669 return 0;\r
670}\r
671\r
e0c635d1
M
672int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r
673\r
7906cb41 674 if (traceCrypto1)\r
80b1b53f 675 crypto1_destroy(traceCrypto1);\r
676\r
e0c635d1
M
677 traceCrypto1 = NULL;\r
678\r
7906cb41 679 if (wantSaveToEmlFile)\r
80b1b53f 680 loadTraceCard(tuid);\r
7906cb41 681\r
55acbb2a
M
682 traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];\r
683 traceCard[5] = sak;\r
684 memcpy(&traceCard[6], atqa, 2);\r
685 traceCurBlock = 0;\r
686 uid = bytes_to_num(tuid + 3, 4);\r
7906cb41 687\r
55acbb2a 688 traceState = TRACE_IDLE;\r
3a05a1e7 689\r
55acbb2a
M
690 return 0;\r
691}\r
692\r
693void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){\r
694 uint8_t bt = 0;\r
695 int i;\r
7906cb41 696\r
55acbb2a
M
697 if (len != 1) {\r
698 for (i = 0; i < len; i++)\r
699 data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r
700 } else {\r
701 bt = 0;\r
702 for (i = 0; i < 4; i++)\r
703 bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;\r
7906cb41 704\r
55acbb2a
M
705 data[0] = bt;\r
706 }\r
707 return;\r
708}\r
709\r
710\r
6a1f2d82 711int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {\r
55acbb2a
M
712 uint8_t data[64];\r
713\r
714 if (traceState == TRACE_ERROR) return 1;\r
715 if (len > 64) {\r
716 traceState = TRACE_ERROR;\r
717 return 1;\r
718 }\r
7906cb41 719\r
55acbb2a
M
720 memcpy(data, data_src, len);\r
721 if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r
722 mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
723 PrintAndLog("dec> %s", sprint_hex(data, len));\r
7906cb41 724 AddLogHex(logHexFileName, "dec> ", data, len);\r
55acbb2a 725 }\r
7906cb41 726\r
55acbb2a 727 switch (traceState) {\r
7906cb41 728 case TRACE_IDLE:\r
8b6a93df
M
729 // check packet crc16!\r
730 if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {\r
731 PrintAndLog("dec> CRC ERROR!!!");\r
7906cb41 732 AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!");\r
8b6a93df
M
733 traceState = TRACE_ERROR; // do not decrypt the next commands\r
734 return 1;\r
735 }\r
7906cb41 736\r
55acbb2a
M
737 // AUTHENTICATION\r
738 if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {\r
739 traceState = TRACE_AUTH1;\r
740 traceCurBlock = data[1];\r
741 traceCurKey = data[0] == 60 ? 1:0;\r
742 return 0;\r
743 }\r
744\r
745 // READ\r
746 if ((len ==4) && ((data[0] == 0x30))) {\r
747 traceState = TRACE_READ_DATA;\r
748 traceCurBlock = data[1];\r
749 return 0;\r
750 }\r
751\r
752 // WRITE\r
753 if ((len ==4) && ((data[0] == 0xA0))) {\r
754 traceState = TRACE_WRITE_OK;\r
755 traceCurBlock = data[1];\r
756 return 0;\r
757 }\r
758\r
759 // HALT\r
760 if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {\r
761 traceState = TRACE_ERROR; // do not decrypt the next commands\r
762 return 0;\r
763 }\r
7906cb41 764\r
55acbb2a
M
765 return 0;\r
766 break;\r
7906cb41
F
767\r
768 case TRACE_READ_DATA:\r
55acbb2a
M
769 if (len == 18) {\r
770 traceState = TRACE_IDLE;\r
771\r
e0c635d1
M
772 if (isBlockTrailer(traceCurBlock)) {\r
773 memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);\r
774 } else {\r
775 memcpy(traceCard + traceCurBlock * 16, data, 16);\r
776 }\r
777 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
778 return 0;\r
779 } else {\r
780 traceState = TRACE_ERROR;\r
781 return 1;\r
782 }\r
783 break;\r
784\r
7906cb41 785 case TRACE_WRITE_OK:\r
97d582a6 786 if ((len == 1) && (data[0] == 0x0a)) {\r
55acbb2a
M
787 traceState = TRACE_WRITE_DATA;\r
788\r
789 return 0;\r
790 } else {\r
791 traceState = TRACE_ERROR;\r
792 return 1;\r
793 }\r
794 break;\r
795\r
7906cb41 796 case TRACE_WRITE_DATA:\r
55acbb2a
M
797 if (len == 18) {\r
798 traceState = TRACE_IDLE;\r
799\r
800 memcpy(traceCard + traceCurBlock * 16, data, 16);\r
e0c635d1 801 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
802 return 0;\r
803 } else {\r
804 traceState = TRACE_ERROR;\r
805 return 1;\r
806 }\r
807 break;\r
808\r
7906cb41 809 case TRACE_AUTH1:\r
55acbb2a
M
810 if (len == 4) {\r
811 traceState = TRACE_AUTH2;\r
55acbb2a
M
812 nt = bytes_to_num(data, 4);\r
813 return 0;\r
814 } else {\r
815 traceState = TRACE_ERROR;\r
816 return 1;\r
817 }\r
818 break;\r
819\r
7906cb41 820 case TRACE_AUTH2:\r
55acbb2a
M
821 if (len == 8) {\r
822 traceState = TRACE_AUTH_OK;\r
823\r
824 nr_enc = bytes_to_num(data, 4);\r
825 ar_enc = bytes_to_num(data + 4, 4);\r
826 return 0;\r
827 } else {\r
828 traceState = TRACE_ERROR;\r
829 return 1;\r
830 }\r
831 break;\r
832\r
7906cb41 833 case TRACE_AUTH_OK:\r
55acbb2a
M
834 if (len ==4) {\r
835 traceState = TRACE_IDLE;\r
836\r
2ba37081 837 if (!traceCrypto1) {\r
838 at_enc = bytes_to_num(data, 4);\r
839\r
840 // decode key here)\r
841 ks2 = ar_enc ^ prng_successor(nt, 64);\r
842 ks3 = at_enc ^ prng_successor(nt, 96);\r
843 revstate = lfsr_recovery64(ks2, ks3);\r
844 lfsr_rollback_word(revstate, 0, 0);\r
845 lfsr_rollback_word(revstate, 0, 0);\r
846 lfsr_rollback_word(revstate, nr_enc, 1);\r
847 lfsr_rollback_word(revstate, uid ^ nt, 0);\r
848\r
849 crypto1_get_lfsr(revstate, &lfsr);\r
850 printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));\r
851 AddLogUint64(logHexFileName, "key> ", lfsr);\r
852 } else {\r
853 printf("key> nested not implemented!\n");\r
854 at_enc = bytes_to_num(data, 4);\r
855 \r
856 crypto1_destroy(traceCrypto1);\r
3fe4ff4f 857\r
2ba37081 858 // not implemented\r
859 traceState = TRACE_ERROR;\r
860 }\r
7906cb41 861\r
e0c635d1
M
862 int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r
863 if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r
7906cb41 864\r
55acbb2a 865 if (traceCurKey) {\r
e0c635d1 866 num_to_bytes(lfsr, 6, traceCard + blockShift + 10);\r
55acbb2a 867 } else {\r
e0c635d1 868 num_to_bytes(lfsr, 6, traceCard + blockShift);\r
55acbb2a 869 }\r
e0c635d1 870 if (wantSaveToEmlFile) saveTraceCard();\r
55acbb2a
M
871\r
872 if (traceCrypto1) {\r
873 crypto1_destroy(traceCrypto1);\r
874 }\r
7906cb41 875\r
55acbb2a
M
876 // set cryptosystem state\r
877 traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
55acbb2a
M
878 return 0;\r
879 } else {\r
880 traceState = TRACE_ERROR;\r
881 return 1;\r
882 }\r
883 break;\r
884\r
7906cb41 885 default:\r
55acbb2a
M
886 traceState = TRACE_ERROR;\r
887 return 1;\r
888 }\r
889\r
890 return 0;\r
891}\r
1a5a73ab 892\r
3a05a1e7
OM
893// DECODING\r
894\r
1a5a73ab 895int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){\r
896 /*\r
897 uint32_t nt; // tag challenge\r
898 uint32_t ar_enc; // encrypted reader response\r
899 uint32_t at_enc; // encrypted tag response\r
900 */\r
901 if (traceCrypto1) {\r
902 crypto1_destroy(traceCrypto1);\r
903 }\r
904 ks2 = ar_enc ^ prng_successor(nt, 64);\r
905 ks3 = at_enc ^ prng_successor(nt, 96);\r
906 traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
907\r
908 mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
909\r
910 PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) );\r
911 crypto1_destroy(traceCrypto1);\r
912 return 0;\r
913}\r
7906cb41 914\r
fe6bf3c5
OM
915/** validate_prng_nonce\r
916 * Determine if nonce is deterministic. ie: Suspectable to Darkside attack.\r
917 * returns\r
918 * true = weak prng\r
919 * false = hardend prng\r
920 */\r
921bool validate_prng_nonce(uint32_t nonce) {\r
922 uint16_t *dist = 0;\r
923 uint16_t x, i;\r
924\r
925 dist = malloc(2 << 16);\r
926 if(!dist)\r
927 return -1;\r
928\r
929 // init prng table:\r
930 for (x = i = 1; i; ++i) {\r
931 dist[(x & 0xff) << 8 | x >> 8] = i;\r
932 x = x >> 1 | (x ^ x >> 2 ^ x >> 3 ^ x >> 5) << 15;\r
933 }\r
934 \r
935 uint32_t res = (65535 - dist[nonce >> 16] + dist[nonce & 0xffff]) % 65535;\r
936 \r
937 free(dist); \r
938 return (res == 16);\r
939}\r
940\r
941/* Detect Tag Prng, \r
942* function performs a partial AUTH, where it tries to authenticate against block0, key A, but only collects tag nonce.\r
943* the tag nonce is check to see if it has a predictable PRNG.\r
944* @returns \r
945* TRUE if tag uses WEAK prng (ie Now the NACK bug also needs to be present for Darkside attack)\r
946* FALSE is tag uses HARDEND prng (ie hardnested attack possible, with known key)\r
947*/\r
948int DetectClassicPrng(void){\r
949\r
950 UsbCommand resp, respA; \r
951 uint8_t cmd[] = {0x60, 0x00}; // MIFARE_AUTH_KEYA\r
952 uint32_t flags = ISO14A_CONNECT | ISO14A_RAW | ISO14A_APPEND_CRC | ISO14A_NO_RATS;\r
953 \r
954 UsbCommand c = {CMD_READER_ISO_14443a, {flags, sizeof(cmd), 0}};\r
955 memcpy(c.d.asBytes, cmd, sizeof(cmd));\r
956\r
957 clearCommandBuffer();\r
958 SendCommand(&c);\r
959 if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {\r
960 PrintAndLog("PRNG UID: Reply timeout.");\r
961 return -1;\r
962 }\r
963 \r
964 // if select tag failed.\r
965 if (resp.arg[0] == 0) {\r
966 PrintAndLog("PRNG error: selecting tag failed, can't detect prng.");\r
967 return -1;\r
968 }\r
969 \r
970 if (!WaitForResponseTimeout(CMD_ACK, &respA, 5000)) {\r
971 PrintAndLog("PRNG data: Reply timeout.");\r
972 return -1;\r
973 }\r
974\r
975 // check respA\r
976 if (respA.arg[0] != 4) {\r
977 PrintAndLog("PRNG data error: Wrong length: %d", respA.arg[0]);\r
978 return -1;\r
979 }\r
980\r
981 uint32_t nonce = bytes_to_num(respA.d.asBytes, respA.arg[0]);\r
982 return validate_prng_nonce(nonce);\r
983}\r
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