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Commit | Line | Data |
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b62a5a84 | 1 | // Merlok, 2011, 2012\r |
f397b5cc M |
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 | 39 | static 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 | |
51 | static 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 | |
76 | static 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 | |
116 | int 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 | 227 | int 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 |
231 | UsbCommand c = {CMD_MIFARE_CHKKEYS, {((blockNo & 0xff) | ((keyType&0xff)<<8)), clear_trace, keycnt}};\r | |
232 | memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r | |
233 | SendCommand(&c);\r | |
234 | \r | |
235 | UsbCommand resp;\r | |
236 | if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;\r | |
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 | |
9492e0b0 | 242 | // Compare 16 Bits out of cryptostate\r |
243 | int Compare16Bits(const void * a, const void * b) {\r | |
244 | if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;\r | |
245 | else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;\r | |
246 | else return -1;\r | |
f397b5cc M |
247 | }\r |
248 | \r | |
7906cb41 | 249 | typedef\r |
9492e0b0 | 250 | struct {\r |
251 | union {\r | |
252 | struct Crypto1State *slhead;\r | |
253 | uint64_t *keyhead;\r | |
3f7c993d | 254 | } head;\r |
9492e0b0 | 255 | union {\r |
256 | struct Crypto1State *sltail;\r | |
257 | uint64_t *keytail;\r | |
3f7c993d | 258 | } tail;\r |
9492e0b0 | 259 | uint32_t len;\r |
260 | uint32_t uid;\r | |
261 | uint32_t blockNo;\r | |
262 | uint32_t keyType;\r | |
263 | uint32_t nt;\r | |
264 | uint32_t ks1;\r | |
265 | } StateList_t;\r | |
266 | \r | |
267 | \r | |
268 | // wrapper function for multi-threaded lfsr_recovery32\r | |
269 | void* nested_worker_thread(void *arg)\r | |
270 | {\r | |
271 | struct Crypto1State *p1;\r | |
272 | StateList_t *statelist = arg;\r | |
273 | \r | |
3f7c993d | 274 | statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);\r |
275 | for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r | |
276 | statelist->len = p1 - statelist->head.slhead;\r | |
277 | statelist->tail.sltail = --p1;\r | |
278 | qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r | |
7906cb41 | 279 | \r |
3f7c993d | 280 | return statelist->head.slhead;\r |
f397b5cc M |
281 | }\r |
282 | \r | |
7906cb41 | 283 | int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t *resultKey, bool calibrate)\r |
f397b5cc | 284 | {\r |
dc8ba239 | 285 | uint16_t i;\r |
f397b5cc | 286 | uint32_t uid;\r |
902cb3c0 | 287 | UsbCommand resp;\r |
f397b5cc | 288 | \r |
9492e0b0 | 289 | StateList_t statelists[2];\r |
290 | struct Crypto1State *p1, *p2, *p3, *p4;\r | |
7906cb41 | 291 | \r |
f397b5cc | 292 | // flush queue\r |
dc8ba239 | 293 | WaitForResponseTimeout(CMD_ACK, NULL, 100);\r |
7906cb41 | 294 | \r |
9492e0b0 | 295 | UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r |
f397b5cc | 296 | memcpy(c.d.asBytes, key, 6);\r |
9492e0b0 | 297 | SendCommand(&c);\r |
f397b5cc | 298 | \r |
dc8ba239 | 299 | if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r |
300 | return -1;\r | |
301 | }\r | |
f397b5cc | 302 | \r |
dc8ba239 | 303 | if (resp.arg[0]) {\r |
304 | return resp.arg[0]; // error during nested\r | |
305 | }\r | |
7906cb41 | 306 | \r |
dc8ba239 | 307 | memcpy(&uid, resp.d.asBytes, 4);\r |
308 | PrintAndLog("uid:%08x trgbl=%d trgkey=%x", uid, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);\r | |
7906cb41 | 309 | \r |
dc8ba239 | 310 | for (i = 0; i < 2; i++) {\r |
311 | statelists[i].blockNo = resp.arg[2] & 0xff;\r | |
312 | statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r | |
313 | statelists[i].uid = uid;\r | |
314 | memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r | |
315 | memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r | |
f397b5cc | 316 | }\r |
7906cb41 | 317 | \r |
f397b5cc | 318 | // calc keys\r |
7906cb41 | 319 | \r |
9492e0b0 | 320 | pthread_t thread_id[2];\r |
7906cb41 | 321 | \r |
9492e0b0 | 322 | // create and run worker threads\r |
323 | for (i = 0; i < 2; i++) {\r | |
324 | pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r | |
f397b5cc | 325 | }\r |
7906cb41 | 326 | \r |
9492e0b0 | 327 | // wait for threads to terminate:\r |
328 | for (i = 0; i < 2; i++) {\r | |
3f7c993d | 329 | pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r |
f397b5cc M |
330 | }\r |
331 | \r | |
f397b5cc | 332 | \r |
9492e0b0 | 333 | // the first 16 Bits of the cryptostate already contain part of our key.\r |
334 | // Create the intersection of the two lists based on these 16 Bits and\r | |
335 | // roll back the cryptostate\r | |
7906cb41 | 336 | p1 = p3 = statelists[0].head.slhead;\r |
3f7c993d | 337 | p2 = p4 = statelists[1].head.slhead;\r |
338 | while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r | |
9492e0b0 | 339 | if (Compare16Bits(p1, p2) == 0) {\r |
340 | struct Crypto1State savestate, *savep = &savestate;\r | |
341 | savestate = *p1;\r | |
3f7c993d | 342 | while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r |
9492e0b0 | 343 | *p3 = *p1;\r |
344 | lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);\r | |
345 | p3++;\r | |
346 | p1++;\r | |
347 | }\r | |
348 | savestate = *p2;\r | |
3f7c993d | 349 | while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {\r |
9492e0b0 | 350 | *p4 = *p2;\r |
351 | lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);\r | |
352 | p4++;\r | |
353 | p2++;\r | |
354 | }\r | |
355 | }\r | |
356 | else {\r | |
357 | while (Compare16Bits(p1, p2) == -1) p1++;\r | |
358 | while (Compare16Bits(p1, p2) == 1) p2++;\r | |
359 | }\r | |
f397b5cc | 360 | }\r |
7779d73c | 361 | *(uint64_t*)p3 = -1;\r |
362 | *(uint64_t*)p4 = -1;\r | |
3f7c993d | 363 | statelists[0].len = p3 - statelists[0].head.slhead;\r |
364 | statelists[1].len = p4 - statelists[1].head.slhead;\r | |
365 | statelists[0].tail.sltail=--p3;\r | |
366 | statelists[1].tail.sltail=--p4;\r | |
9492e0b0 | 367 | \r |
368 | // the statelists now contain possible keys. The key we are searching for must be in the\r | |
369 | // intersection of both lists. Create the intersection:\r | |
7779d73c | 370 | qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compare_uint64);\r |
371 | qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compare_uint64);\r | |
372 | statelists[0].len = intersection(statelists[0].head.keyhead, statelists[1].head.keyhead);\r | |
9492e0b0 | 373 | \r |
374 | memset(resultKey, 0, 6);\r | |
375 | // The list may still contain several key candidates. Test each of them with mfCheckKeys\r | |
376 | for (i = 0; i < statelists[0].len; i++) {\r | |
377 | uint8_t keyBlock[6];\r | |
378 | uint64_t key64;\r | |
3f7c993d | 379 | crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r |
9492e0b0 | 380 | num_to_bytes(key64, 6, keyBlock);\r |
381 | key64 = 0;\r | |
5330f532 | 382 | if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, 1, keyBlock, &key64)) {\r |
9492e0b0 | 383 | num_to_bytes(key64, 6, resultKey);\r |
384 | break;\r | |
385 | }\r | |
386 | }\r | |
7906cb41 | 387 | \r |
3f7c993d | 388 | free(statelists[0].head.slhead);\r |
389 | free(statelists[1].head.slhead);\r | |
7906cb41 | 390 | \r |
f397b5cc M |
391 | return 0;\r |
392 | }\r | |
393 | \r | |
55acbb2a M |
394 | // EMULATOR\r |
395 | \r | |
8556b852 | 396 | int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r |
545a1f38 | 397 | UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r |
902cb3c0 | 398 | SendCommand(&c);\r |
14d76577 | 399 | UsbCommand resp;\r |
902cb3c0 | 400 | if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\r |
401 | memcpy(data, resp.d.asBytes, blocksCount * 16);\r | |
8556b852 M |
402 | return 0;\r |
403 | }\r | |
404 | \r | |
405 | int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r | |
545a1f38 | 406 | UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r |
7906cb41 | 407 | memcpy(c.d.asBytes, data, blocksCount * 16);\r |
545a1f38 | 408 | SendCommand(&c);\r |
8556b852 M |
409 | return 0;\r |
410 | }\r | |
411 | \r | |
55acbb2a M |
412 | // "MAGIC" CARD\r |
413 | \r | |
7cb8516c | 414 | int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r |
415 | uint8_t isOK = 0;\r | |
3bba7dea | 416 | \r |
7cb8516c | 417 | UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};\r |
418 | SendCommand(&c);\r | |
14d76577 | 419 | UsbCommand resp;\r |
7cb8516c | 420 | if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r |
421 | isOK = resp.arg[0] & 0xff;\r | |
422 | memcpy(data, resp.d.asBytes, 16);\r | |
423 | if (!isOK) return 2;\r | |
424 | } else {\r | |
425 | PrintAndLog("Command execute timeout");\r | |
426 | return 1;\r | |
80b1b53f | 427 | }\r |
7cb8516c | 428 | return 0;\r |
f774db95 M |
429 | }\r |
430 | \r | |
6a1f2d82 | 431 | int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {\r |
0675f200 | 432 | \r |
3fe4ff4f | 433 | uint8_t isOK = 0;\r |
434 | UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r | |
7906cb41 | 435 | memcpy(c.d.asBytes, data, 16);\r |
545a1f38 | 436 | SendCommand(&c);\r |
14d76577 | 437 | UsbCommand resp;\r |
902cb3c0 | 438 | if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r |
439 | isOK = resp.arg[0] & 0xff;\r | |
7906cb41 | 440 | if (uid != NULL)\r |
80b1b53f | 441 | memcpy(uid, resp.d.asBytes, 4);\r |
7906cb41 | 442 | if (!isOK)\r |
80b1b53f | 443 | return 2;\r |
0675f200 M |
444 | } else {\r |
445 | PrintAndLog("Command execute timeout");\r | |
446 | return 1;\r | |
447 | }\r | |
448 | return 0;\r | |
449 | }\r | |
545a1f38 | 450 | \r |
7cb8516c | 451 | int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, bool wantWipe) {\r |
452 | uint8_t oldblock0[16] = {0x00};\r | |
453 | uint8_t block0[16] = {0x00};\r | |
7906cb41 F |
454 | int old, gen = 0;\r |
455 | \r | |
456 | gen = mfCIdentify();\r | |
457 | \r | |
458 | if (gen == 2) {\r | |
459 | /* generation 1b magic card */\r | |
460 | old = mfCGetBlock(0, oldblock0, CSETBLOCK_SINGLE_OPER | CSETBLOCK_MAGIC_1B);\r | |
461 | } else {\r | |
462 | /* generation 1a magic card by default */\r | |
463 | old = mfCGetBlock(0, oldblock0, CSETBLOCK_SINGLE_OPER);\r | |
464 | }\r | |
545a1f38 | 465 | \r |
7cb8516c | 466 | if (old == 0) {\r |
467 | memcpy(block0, oldblock0, 16);\r | |
468 | PrintAndLog("old block 0: %s", sprint_hex(block0,16));\r | |
545a1f38 | 469 | } else {\r |
7cb8516c | 470 | PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");\r |
545a1f38 | 471 | }\r |
7cb8516c | 472 | \r |
473 | // fill in the new values\r | |
474 | // UID\r | |
7906cb41 | 475 | memcpy(block0, uid, 4);\r |
7cb8516c | 476 | // Mifare UID BCC\r |
477 | block0[4] = block0[0]^block0[1]^block0[2]^block0[3];\r | |
478 | // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)\r | |
479 | if (sak!=NULL)\r | |
480 | block0[5]=sak[0];\r | |
481 | if (atqa!=NULL) {\r | |
482 | block0[6]=atqa[1];\r | |
483 | block0[7]=atqa[0];\r | |
484 | }\r | |
485 | PrintAndLog("new block 0: %s", sprint_hex(block0,16));\r | |
7906cb41 F |
486 | \r |
487 | if (gen == 2) {\r | |
488 | /* generation 1b magic card */\r | |
489 | return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER | CSETBLOCK_MAGIC_1B);\r | |
490 | } else {\r | |
491 | /* generation 1a magic card by default */\r | |
492 | return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);\r | |
493 | }\r | |
545a1f38 | 494 | }\r |
55acbb2a M |
495 | \r |
496 | // SNIFFER\r | |
497 | \r | |
e0c635d1 M |
498 | // constants\r |
499 | static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r | |
500 | \r | |
55acbb2a | 501 | // variables\r |
e4691591 | 502 | char logHexFileName[FILE_PATH_SIZE] = {0x00};\r |
e0c635d1 | 503 | static uint8_t traceCard[4096] = {0x00};\r |
e4691591 | 504 | static char traceFileName[FILE_PATH_SIZE] = {0x00};\r |
55acbb2a M |
505 | static int traceState = TRACE_IDLE;\r |
506 | static uint8_t traceCurBlock = 0;\r | |
507 | static uint8_t traceCurKey = 0;\r | |
508 | \r | |
509 | struct Crypto1State *traceCrypto1 = NULL;\r | |
510 | \r | |
511 | struct Crypto1State *revstate;\r | |
512 | uint64_t lfsr;\r | |
513 | uint32_t ks2;\r | |
514 | uint32_t ks3;\r | |
515 | \r | |
516 | uint32_t uid; // serial number\r | |
517 | uint32_t nt; // tag challenge\r | |
518 | uint32_t nr_enc; // encrypted reader challenge\r | |
519 | uint32_t ar_enc; // encrypted reader response\r | |
520 | uint32_t at_enc; // encrypted tag response\r | |
521 | \r | |
e0c635d1 M |
522 | int isTraceCardEmpty(void) {\r |
523 | return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r | |
524 | }\r | |
55acbb2a | 525 | \r |
e0c635d1 | 526 | int isBlockEmpty(int blockN) {\r |
7906cb41 | 527 | for (int i = 0; i < 16; i++)\r |
e0c635d1 | 528 | if (traceCard[blockN * 16 + i] != 0) return 0;\r |
55acbb2a | 529 | \r |
e0c635d1 M |
530 | return 1;\r |
531 | }\r | |
532 | \r | |
533 | int isBlockTrailer(int blockN) {\r | |
14d76577 | 534 | return ((blockN & 0x03) == 0x03);\r |
e0c635d1 M |
535 | }\r |
536 | \r | |
7cb8516c | 537 | int saveTraceCard(void) {\r |
538 | FILE * f;\r | |
7906cb41 | 539 | \r |
7cb8516c | 540 | if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r |
7906cb41 | 541 | \r |
7cb8516c | 542 | f = fopen(traceFileName, "w+");\r |
543 | if ( !f ) return 1;\r | |
7906cb41 | 544 | \r |
7cb8516c | 545 | for (int i = 0; i < 64; i++) { // blocks\r |
546 | for (int j = 0; j < 16; j++) // bytes\r | |
7906cb41 | 547 | fprintf(f, "%02x", *(traceCard + i * 16 + j));\r |
7cb8516c | 548 | fprintf(f,"\n");\r |
549 | }\r | |
550 | fclose(f);\r | |
551 | return 0;\r | |
552 | }\r | |
553 | \r | |
e0c635d1 M |
554 | int loadTraceCard(uint8_t *tuid) {\r |
555 | FILE * f;\r | |
80b1b53f | 556 | char buf[64] = {0x00};\r |
557 | uint8_t buf8[64] = {0x00};\r | |
e0c635d1 | 558 | int i, blockNum;\r |
7906cb41 F |
559 | \r |
560 | if (!isTraceCardEmpty())\r | |
80b1b53f | 561 | saveTraceCard();\r |
7906cb41 | 562 | \r |
55acbb2a M |
563 | memset(traceCard, 0x00, 4096);\r |
564 | memcpy(traceCard, tuid + 3, 4);\r | |
80b1b53f | 565 | \r |
e0c635d1 M |
566 | FillFileNameByUID(traceFileName, tuid, ".eml", 7);\r |
567 | \r | |
568 | f = fopen(traceFileName, "r");\r | |
e6432f05 | 569 | if (!f) return 1;\r |
7906cb41 | 570 | \r |
e0c635d1 | 571 | blockNum = 0;\r |
7906cb41 | 572 | \r |
e0c635d1 | 573 | while(!feof(f)){\r |
7906cb41 | 574 | \r |
e0c635d1 | 575 | memset(buf, 0, sizeof(buf));\r |
759c16b3 | 576 | if (fgets(buf, sizeof(buf), f) == NULL) {\r |
ca4714cd MHS |
577 | PrintAndLog("File reading error.");\r |
578 | fclose(f);\r | |
759c16b3 | 579 | return 2;\r |
ca4714cd | 580 | }\r |
e0c635d1 M |
581 | \r |
582 | if (strlen(buf) < 32){\r | |
583 | if (feof(f)) break;\r | |
584 | PrintAndLog("File content error. Block data must include 32 HEX symbols");\r | |
ca4714cd | 585 | fclose(f);\r |
e0c635d1 M |
586 | return 2;\r |
587 | }\r | |
588 | for (i = 0; i < 32; i += 2)\r | |
589 | sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);\r | |
590 | \r | |
591 | memcpy(traceCard + blockNum * 16, buf8, 16);\r | |
592 | \r | |
593 | blockNum++;\r | |
594 | }\r | |
595 | fclose(f);\r | |
e0c635d1 M |
596 | return 0;\r |
597 | }\r | |
598 | \r | |
e0c635d1 M |
599 | int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r |
600 | \r | |
7906cb41 | 601 | if (traceCrypto1)\r |
80b1b53f | 602 | crypto1_destroy(traceCrypto1);\r |
603 | \r | |
e0c635d1 M |
604 | traceCrypto1 = NULL;\r |
605 | \r | |
7906cb41 | 606 | if (wantSaveToEmlFile)\r |
80b1b53f | 607 | loadTraceCard(tuid);\r |
7906cb41 | 608 | \r |
55acbb2a M |
609 | traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];\r |
610 | traceCard[5] = sak;\r | |
611 | memcpy(&traceCard[6], atqa, 2);\r | |
612 | traceCurBlock = 0;\r | |
613 | uid = bytes_to_num(tuid + 3, 4);\r | |
7906cb41 | 614 | \r |
55acbb2a | 615 | traceState = TRACE_IDLE;\r |
55acbb2a M |
616 | return 0;\r |
617 | }\r | |
618 | \r | |
619 | void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){\r | |
620 | uint8_t bt = 0;\r | |
621 | int i;\r | |
7906cb41 | 622 | \r |
55acbb2a M |
623 | if (len != 1) {\r |
624 | for (i = 0; i < len; i++)\r | |
625 | data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r | |
626 | } else {\r | |
627 | bt = 0;\r | |
628 | for (i = 0; i < 4; i++)\r | |
629 | bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;\r | |
7906cb41 | 630 | \r |
55acbb2a M |
631 | data[0] = bt;\r |
632 | }\r | |
633 | return;\r | |
634 | }\r | |
635 | \r | |
636 | \r | |
6a1f2d82 | 637 | int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {\r |
55acbb2a M |
638 | uint8_t data[64];\r |
639 | \r | |
640 | if (traceState == TRACE_ERROR) return 1;\r | |
641 | if (len > 64) {\r | |
642 | traceState = TRACE_ERROR;\r | |
643 | return 1;\r | |
644 | }\r | |
7906cb41 | 645 | \r |
55acbb2a M |
646 | memcpy(data, data_src, len);\r |
647 | if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r | |
648 | mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r | |
649 | PrintAndLog("dec> %s", sprint_hex(data, len));\r | |
7906cb41 | 650 | AddLogHex(logHexFileName, "dec> ", data, len);\r |
55acbb2a | 651 | }\r |
7906cb41 | 652 | \r |
55acbb2a | 653 | switch (traceState) {\r |
7906cb41 | 654 | case TRACE_IDLE:\r |
8b6a93df M |
655 | // check packet crc16!\r |
656 | if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {\r | |
657 | PrintAndLog("dec> CRC ERROR!!!");\r | |
7906cb41 | 658 | AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!");\r |
8b6a93df M |
659 | traceState = TRACE_ERROR; // do not decrypt the next commands\r |
660 | return 1;\r | |
661 | }\r | |
7906cb41 | 662 | \r |
55acbb2a M |
663 | // AUTHENTICATION\r |
664 | if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {\r | |
665 | traceState = TRACE_AUTH1;\r | |
666 | traceCurBlock = data[1];\r | |
667 | traceCurKey = data[0] == 60 ? 1:0;\r | |
668 | return 0;\r | |
669 | }\r | |
670 | \r | |
671 | // READ\r | |
672 | if ((len ==4) && ((data[0] == 0x30))) {\r | |
673 | traceState = TRACE_READ_DATA;\r | |
674 | traceCurBlock = data[1];\r | |
675 | return 0;\r | |
676 | }\r | |
677 | \r | |
678 | // WRITE\r | |
679 | if ((len ==4) && ((data[0] == 0xA0))) {\r | |
680 | traceState = TRACE_WRITE_OK;\r | |
681 | traceCurBlock = data[1];\r | |
682 | return 0;\r | |
683 | }\r | |
684 | \r | |
685 | // HALT\r | |
686 | if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {\r | |
687 | traceState = TRACE_ERROR; // do not decrypt the next commands\r | |
688 | return 0;\r | |
689 | }\r | |
7906cb41 | 690 | \r |
55acbb2a M |
691 | return 0;\r |
692 | break;\r | |
7906cb41 F |
693 | \r |
694 | case TRACE_READ_DATA:\r | |
55acbb2a M |
695 | if (len == 18) {\r |
696 | traceState = TRACE_IDLE;\r | |
697 | \r | |
e0c635d1 M |
698 | if (isBlockTrailer(traceCurBlock)) {\r |
699 | memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);\r | |
700 | } else {\r | |
701 | memcpy(traceCard + traceCurBlock * 16, data, 16);\r | |
702 | }\r | |
703 | if (wantSaveToEmlFile) saveTraceCard();\r | |
55acbb2a M |
704 | return 0;\r |
705 | } else {\r | |
706 | traceState = TRACE_ERROR;\r | |
707 | return 1;\r | |
708 | }\r | |
709 | break;\r | |
710 | \r | |
7906cb41 | 711 | case TRACE_WRITE_OK:\r |
97d582a6 | 712 | if ((len == 1) && (data[0] == 0x0a)) {\r |
55acbb2a M |
713 | traceState = TRACE_WRITE_DATA;\r |
714 | \r | |
715 | return 0;\r | |
716 | } else {\r | |
717 | traceState = TRACE_ERROR;\r | |
718 | return 1;\r | |
719 | }\r | |
720 | break;\r | |
721 | \r | |
7906cb41 | 722 | case TRACE_WRITE_DATA:\r |
55acbb2a M |
723 | if (len == 18) {\r |
724 | traceState = TRACE_IDLE;\r | |
725 | \r | |
726 | memcpy(traceCard + traceCurBlock * 16, data, 16);\r | |
e0c635d1 | 727 | if (wantSaveToEmlFile) saveTraceCard();\r |
55acbb2a M |
728 | return 0;\r |
729 | } else {\r | |
730 | traceState = TRACE_ERROR;\r | |
731 | return 1;\r | |
732 | }\r | |
733 | break;\r | |
734 | \r | |
7906cb41 | 735 | case TRACE_AUTH1:\r |
55acbb2a M |
736 | if (len == 4) {\r |
737 | traceState = TRACE_AUTH2;\r | |
55acbb2a M |
738 | nt = bytes_to_num(data, 4);\r |
739 | return 0;\r | |
740 | } else {\r | |
741 | traceState = TRACE_ERROR;\r | |
742 | return 1;\r | |
743 | }\r | |
744 | break;\r | |
745 | \r | |
7906cb41 | 746 | case TRACE_AUTH2:\r |
55acbb2a M |
747 | if (len == 8) {\r |
748 | traceState = TRACE_AUTH_OK;\r | |
749 | \r | |
750 | nr_enc = bytes_to_num(data, 4);\r | |
751 | ar_enc = bytes_to_num(data + 4, 4);\r | |
752 | return 0;\r | |
753 | } else {\r | |
754 | traceState = TRACE_ERROR;\r | |
755 | return 1;\r | |
756 | }\r | |
757 | break;\r | |
758 | \r | |
7906cb41 | 759 | case TRACE_AUTH_OK:\r |
55acbb2a M |
760 | if (len ==4) {\r |
761 | traceState = TRACE_IDLE;\r | |
762 | \r | |
763 | at_enc = bytes_to_num(data, 4);\r | |
7906cb41 | 764 | \r |
55acbb2a | 765 | // decode key here)\r |
97d582a6 MHS |
766 | ks2 = ar_enc ^ prng_successor(nt, 64);\r |
767 | ks3 = at_enc ^ prng_successor(nt, 96);\r | |
768 | revstate = lfsr_recovery64(ks2, ks3);\r | |
769 | lfsr_rollback_word(revstate, 0, 0);\r | |
770 | lfsr_rollback_word(revstate, 0, 0);\r | |
771 | lfsr_rollback_word(revstate, nr_enc, 1);\r | |
772 | lfsr_rollback_word(revstate, uid ^ nt, 0);\r | |
3fe4ff4f | 773 | \r |
55acbb2a M |
774 | crypto1_get_lfsr(revstate, &lfsr);\r |
775 | printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));\r | |
7906cb41 F |
776 | AddLogUint64(logHexFileName, "key> ", lfsr);\r |
777 | \r | |
e0c635d1 M |
778 | int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r |
779 | if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r | |
7906cb41 | 780 | \r |
55acbb2a | 781 | if (traceCurKey) {\r |
e0c635d1 | 782 | num_to_bytes(lfsr, 6, traceCard + blockShift + 10);\r |
55acbb2a | 783 | } else {\r |
e0c635d1 | 784 | num_to_bytes(lfsr, 6, traceCard + blockShift);\r |
55acbb2a | 785 | }\r |
e0c635d1 | 786 | if (wantSaveToEmlFile) saveTraceCard();\r |
55acbb2a M |
787 | \r |
788 | if (traceCrypto1) {\r | |
789 | crypto1_destroy(traceCrypto1);\r | |
790 | }\r | |
7906cb41 | 791 | \r |
55acbb2a M |
792 | // set cryptosystem state\r |
793 | traceCrypto1 = lfsr_recovery64(ks2, ks3);\r | |
7906cb41 | 794 | \r |
55acbb2a M |
795 | // nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt;\r |
796 | \r | |
797 | /* traceCrypto1 = crypto1_create(lfsr); // key in lfsr\r | |
798 | crypto1_word(traceCrypto1, nt ^ uid, 0);\r | |
799 | crypto1_word(traceCrypto1, ar, 1);\r | |
800 | crypto1_word(traceCrypto1, 0, 0);\r | |
801 | crypto1_word(traceCrypto1, 0, 0);*/\r | |
7906cb41 | 802 | \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 | default:\r |
55acbb2a M |
811 | traceState = TRACE_ERROR;\r |
812 | return 1;\r | |
813 | }\r | |
814 | \r | |
815 | return 0;\r | |
816 | }\r | |
1a5a73ab | 817 | \r |
818 | int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){\r | |
819 | /*\r | |
820 | uint32_t nt; // tag challenge\r | |
821 | uint32_t ar_enc; // encrypted reader response\r | |
822 | uint32_t at_enc; // encrypted tag response\r | |
823 | */\r | |
824 | if (traceCrypto1) {\r | |
825 | crypto1_destroy(traceCrypto1);\r | |
826 | }\r | |
827 | ks2 = ar_enc ^ prng_successor(nt, 64);\r | |
828 | ks3 = at_enc ^ prng_successor(nt, 96);\r | |
829 | traceCrypto1 = lfsr_recovery64(ks2, ks3);\r | |
830 | \r | |
831 | mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r | |
832 | \r | |
833 | PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) );\r | |
834 | crypto1_destroy(traceCrypto1);\r | |
835 | return 0;\r | |
836 | }\r | |
7906cb41 F |
837 | \r |
838 | int mfCIdentify()\r | |
839 | {\r | |
840 | UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_CONNECT | ISO14A_NO_DISCONNECT, 0, 0}};\r | |
841 | SendCommand(&c);\r | |
7906cb41 F |
842 | UsbCommand resp;\r |
843 | WaitForResponse(CMD_ACK,&resp);\r | |
844 | \r | |
845 | iso14a_card_select_t card;\r | |
846 | memcpy(&card, (iso14a_card_select_t *)resp.d.asBytes, sizeof(iso14a_card_select_t));\r | |
847 | \r | |
848 | uint64_t select_status = resp.arg[0]; // 0: couldn't read, 1: OK, with ATS, 2: OK, no ATS, 3: proprietary Anticollision\r | |
849 | \r | |
850 | if(select_status != 0) {\r | |
851 | uint8_t rats[] = { 0xE0, 0x80 }; // FSDI=8 (FSD=256), CID=0\r | |
852 | c.arg[0] = ISO14A_RAW | ISO14A_APPEND_CRC | ISO14A_NO_DISCONNECT;\r | |
853 | c.arg[1] = 2;\r | |
854 | c.arg[2] = 0;\r | |
855 | memcpy(c.d.asBytes, rats, 2);\r | |
856 | SendCommand(&c);\r | |
857 | WaitForResponse(CMD_ACK,&resp);\r | |
858 | }\r | |
859 | \r | |
860 | c.cmd = CMD_MIFARE_CIDENT;\r | |
861 | c.arg[0] = 0;\r | |
862 | c.arg[1] = 0;\r | |
863 | c.arg[2] = 0;\r | |
864 | SendCommand(&c);\r | |
865 | WaitForResponse(CMD_ACK,&resp);\r | |
866 | \r | |
867 | uint8_t isGeneration = resp.arg[0] & 0xff;\r | |
868 | switch( isGeneration ){\r | |
869 | case 1: PrintAndLog("Chinese magic backdoor commands (GEN 1a) detected"); break;\r | |
870 | case 2: PrintAndLog("Chinese magic backdoor command (GEN 1b) detected"); break;\r | |
871 | default: PrintAndLog("No chinese magic backdoor command detected"); break;\r | |
872 | }\r | |
873 | \r | |
874 | // disconnect\r | |
875 | c.cmd = CMD_READER_ISO_14443a;\r | |
876 | c.arg[0] = 0;\r | |
877 | c.arg[1] = 0;\r | |
878 | c.arg[2] = 0;\r | |
879 | SendCommand(&c);\r | |
880 | \r | |
881 | return (int) isGeneration;\r | |
882 | }\r |