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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 | |
11 | #include <stdio.h>\r | |
873014de | 12 | #include <stdlib.h> \r |
31b6e9af | 13 | #include <string.h>\r |
9492e0b0 | 14 | #include <pthread.h>\r |
f397b5cc | 15 | #include "mifarehost.h"\r |
902cb3c0 | 16 | #include "proxmark3.h"\r |
f397b5cc | 17 | \r |
046fd766 | 18 | #define llx PRIx64\r |
19 | \r | |
55acbb2a | 20 | // MIFARE\r |
f397b5cc | 21 | int compar_int(const void * a, const void * b) {\r |
9492e0b0 | 22 | // didn't work: (the result is truncated to 32 bits)\r |
23 | //return (*(uint64_t*)b - *(uint64_t*)a);\r | |
24 | \r | |
25 | // better:\r | |
26 | if (*(uint64_t*)b == *(uint64_t*)a) return 0;\r | |
27 | else if (*(uint64_t*)b > *(uint64_t*)a) return 1;\r | |
28 | else return -1;\r | |
f397b5cc M |
29 | }\r |
30 | \r | |
9492e0b0 | 31 | // Compare 16 Bits out of cryptostate\r |
32 | int Compare16Bits(const void * a, const void * b) {\r | |
33 | if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;\r | |
34 | else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;\r | |
35 | else return -1;\r | |
f397b5cc M |
36 | }\r |
37 | \r | |
9492e0b0 | 38 | typedef \r |
39 | struct {\r | |
40 | union {\r | |
41 | struct Crypto1State *slhead;\r | |
42 | uint64_t *keyhead;\r | |
3f7c993d | 43 | } head;\r |
9492e0b0 | 44 | union {\r |
45 | struct Crypto1State *sltail;\r | |
46 | uint64_t *keytail;\r | |
3f7c993d | 47 | } tail;\r |
9492e0b0 | 48 | uint32_t len;\r |
49 | uint32_t uid;\r | |
50 | uint32_t blockNo;\r | |
51 | uint32_t keyType;\r | |
52 | uint32_t nt;\r | |
53 | uint32_t ks1;\r | |
54 | } StateList_t;\r | |
55 | \r | |
56 | \r | |
57 | // wrapper function for multi-threaded lfsr_recovery32\r | |
58 | void* nested_worker_thread(void *arg)\r | |
59 | {\r | |
60 | struct Crypto1State *p1;\r | |
61 | StateList_t *statelist = arg;\r | |
62 | \r | |
3f7c993d | 63 | statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);\r |
64 | for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r | |
65 | statelist->len = p1 - statelist->head.slhead;\r | |
66 | statelist->tail.sltail = --p1;\r | |
67 | qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r | |
f397b5cc | 68 | \r |
3f7c993d | 69 | return statelist->head.slhead;\r |
f397b5cc M |
70 | }\r |
71 | \r | |
9492e0b0 | 72 | int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate) \r |
f397b5cc | 73 | {\r |
9492e0b0 | 74 | uint16_t i, len;\r |
f397b5cc | 75 | uint32_t uid;\r |
902cb3c0 | 76 | UsbCommand resp;\r |
9492e0b0 | 77 | StateList_t statelists[2];\r |
78 | struct Crypto1State *p1, *p2, *p3, *p4;\r | |
79 | \r | |
f397b5cc | 80 | // flush queue\r |
7dd1908b | 81 | WaitForResponseTimeout(CMD_ACK,NULL,100);\r |
f397b5cc | 82 | \r |
9492e0b0 | 83 | UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r |
f397b5cc | 84 | memcpy(c.d.asBytes, key, 6);\r |
9492e0b0 | 85 | SendCommand(&c);\r |
f397b5cc | 86 | \r |
9492e0b0 | 87 | if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r |
88 | len = resp.arg[1];\r | |
89 | if (len == 2) { \r | |
902cb3c0 | 90 | memcpy(&uid, resp.d.asBytes, 4);\r |
9492e0b0 | 91 | PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);\r |
f397b5cc | 92 | \r |
9492e0b0 | 93 | for (i = 0; i < 2; i++) {\r |
94 | statelists[i].blockNo = resp.arg[2] & 0xff;\r | |
95 | statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r | |
96 | statelists[i].uid = uid;\r | |
f397b5cc | 97 | \r |
9492e0b0 | 98 | memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r |
99 | memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r | |
f397b5cc | 100 | }\r |
9492e0b0 | 101 | }\r |
102 | else {\r | |
103 | PrintAndLog("Got 0 keys from proxmark."); \r | |
104 | return 1;\r | |
f397b5cc M |
105 | }\r |
106 | }\r | |
107 | \r | |
f397b5cc | 108 | // calc keys\r |
f397b5cc | 109 | \r |
9492e0b0 | 110 | pthread_t thread_id[2];\r |
111 | \r | |
112 | // create and run worker threads\r | |
113 | for (i = 0; i < 2; i++) {\r | |
114 | pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r | |
f397b5cc M |
115 | }\r |
116 | \r | |
9492e0b0 | 117 | // wait for threads to terminate:\r |
118 | for (i = 0; i < 2; i++) {\r | |
3f7c993d | 119 | pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r |
f397b5cc M |
120 | }\r |
121 | \r | |
f397b5cc | 122 | \r |
9492e0b0 | 123 | // the first 16 Bits of the cryptostate already contain part of our key.\r |
124 | // Create the intersection of the two lists based on these 16 Bits and\r | |
125 | // roll back the cryptostate\r | |
3f7c993d | 126 | p1 = p3 = statelists[0].head.slhead; \r |
127 | p2 = p4 = statelists[1].head.slhead;\r | |
128 | while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r | |
9492e0b0 | 129 | if (Compare16Bits(p1, p2) == 0) {\r |
130 | struct Crypto1State savestate, *savep = &savestate;\r | |
131 | savestate = *p1;\r | |
3f7c993d | 132 | while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r |
9492e0b0 | 133 | *p3 = *p1;\r |
134 | lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);\r | |
135 | p3++;\r | |
136 | p1++;\r | |
137 | }\r | |
138 | savestate = *p2;\r | |
3f7c993d | 139 | while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {\r |
9492e0b0 | 140 | *p4 = *p2;\r |
141 | lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);\r | |
142 | p4++;\r | |
143 | p2++;\r | |
144 | }\r | |
145 | }\r | |
146 | else {\r | |
147 | while (Compare16Bits(p1, p2) == -1) p1++;\r | |
148 | while (Compare16Bits(p1, p2) == 1) p2++;\r | |
149 | }\r | |
f397b5cc | 150 | }\r |
9492e0b0 | 151 | p3->even = 0; p3->odd = 0;\r |
152 | p4->even = 0; p4->odd = 0;\r | |
3f7c993d | 153 | statelists[0].len = p3 - statelists[0].head.slhead;\r |
154 | statelists[1].len = p4 - statelists[1].head.slhead;\r | |
155 | statelists[0].tail.sltail=--p3;\r | |
156 | statelists[1].tail.sltail=--p4;\r | |
9492e0b0 | 157 | \r |
158 | // the statelists now contain possible keys. The key we are searching for must be in the\r | |
159 | // intersection of both lists. Create the intersection:\r | |
3f7c993d | 160 | qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compar_int);\r |
161 | qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compar_int);\r | |
9492e0b0 | 162 | \r |
163 | uint64_t *p5, *p6, *p7;\r | |
3f7c993d | 164 | p5 = p7 = statelists[0].head.keyhead; \r |
165 | p6 = statelists[1].head.keyhead;\r | |
166 | while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) {\r | |
9492e0b0 | 167 | if (compar_int(p5, p6) == 0) {\r |
168 | *p7++ = *p5++;\r | |
169 | p6++;\r | |
170 | }\r | |
171 | else {\r | |
172 | while (compar_int(p5, p6) == -1) p5++;\r | |
173 | while (compar_int(p5, p6) == 1) p6++;\r | |
174 | }\r | |
175 | }\r | |
3f7c993d | 176 | statelists[0].len = p7 - statelists[0].head.keyhead;\r |
177 | statelists[0].tail.keytail=--p7;\r | |
9492e0b0 | 178 | \r |
179 | memset(resultKey, 0, 6);\r | |
180 | // The list may still contain several key candidates. Test each of them with mfCheckKeys\r | |
181 | for (i = 0; i < statelists[0].len; i++) {\r | |
182 | uint8_t keyBlock[6];\r | |
183 | uint64_t key64;\r | |
3f7c993d | 184 | crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r |
9492e0b0 | 185 | num_to_bytes(key64, 6, keyBlock);\r |
186 | key64 = 0;\r | |
187 | if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, 1, keyBlock, &key64)) {\r | |
188 | num_to_bytes(key64, 6, resultKey);\r | |
189 | break;\r | |
190 | }\r | |
191 | }\r | |
192 | \r | |
3f7c993d | 193 | free(statelists[0].head.slhead);\r |
194 | free(statelists[1].head.slhead);\r | |
9492e0b0 | 195 | \r |
f397b5cc M |
196 | return 0;\r |
197 | }\r | |
198 | \r | |
199 | int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r | |
9492e0b0 | 200 | \r |
f397b5cc M |
201 | *key = 0;\r |
202 | \r | |
9492e0b0 | 203 | UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};\r |
f397b5cc | 204 | memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r |
9492e0b0 | 205 | SendCommand(&c);\r |
f397b5cc | 206 | \r |
902cb3c0 | 207 | UsbCommand resp;\r |
208 | if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;\r | |
209 | if ((resp.arg[0] & 0xff) != 0x01) return 2;\r | |
210 | *key = bytes_to_num(resp.d.asBytes, 6);\r | |
f397b5cc M |
211 | return 0;\r |
212 | }\r | |
8556b852 | 213 | \r |
55acbb2a M |
214 | // EMULATOR\r |
215 | \r | |
8556b852 | 216 | int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r |
545a1f38 | 217 | UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r |
902cb3c0 | 218 | SendCommand(&c);\r |
8556b852 | 219 | \r |
5c065fa0 | 220 | UsbCommand resp;\r |
902cb3c0 | 221 | if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\r |
222 | memcpy(data, resp.d.asBytes, blocksCount * 16);\r | |
8556b852 M |
223 | return 0;\r |
224 | }\r | |
225 | \r | |
226 | int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r | |
545a1f38 | 227 | UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r |
8556b852 | 228 | memcpy(c.d.asBytes, data, blocksCount * 16); \r |
545a1f38 | 229 | SendCommand(&c);\r |
8556b852 M |
230 | return 0;\r |
231 | }\r | |
232 | \r | |
55acbb2a M |
233 | // "MAGIC" CARD\r |
234 | \r | |
3bba7dea | 235 | int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, bool wantWipe) {\r |
80b1b53f | 236 | uint8_t oldblock0[16] = {0x00};\r |
1b492a97 | 237 | uint8_t block0[16] = {0x00};\r |
3bba7dea | 238 | \r |
80b1b53f | 239 | int old = mfCGetBlock(0, oldblock0, CSETBLOCK_SINGLE_OPER);\r |
3bba7dea JH |
240 | if (old == 0) {\r |
241 | memcpy(block0, oldblock0, 16);\r | |
242 | PrintAndLog("old block 0: %s", sprint_hex(block0,16));\r | |
80b1b53f | 243 | } else {\r |
3bba7dea JH |
244 | PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");\r |
245 | }\r | |
246 | \r | |
247 | // fill in the new values\r | |
248 | // UID\r | |
249 | memcpy(block0, uid, 4); \r | |
250 | // Mifare UID BCC\r | |
251 | block0[4] = block0[0]^block0[1]^block0[2]^block0[3];\r | |
252 | // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)\r | |
253 | if (sak!=NULL)\r | |
254 | block0[5]=sak[0];\r | |
255 | if (atqa!=NULL) {\r | |
256 | block0[6]=atqa[1];\r | |
257 | block0[7]=atqa[0];\r | |
80b1b53f | 258 | }\r |
3bba7dea | 259 | PrintAndLog("new block 0: %s", sprint_hex(block0,16));\r |
208a0166 | 260 | return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);\r |
f774db95 M |
261 | }\r |
262 | \r | |
a501c82b | 263 | int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {\r |
0675f200 | 264 | \r |
1b492a97 | 265 | uint8_t isOK = 0;\r |
9c7c222c | 266 | UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r |
f774db95 | 267 | memcpy(c.d.asBytes, data, 16); \r |
545a1f38 | 268 | SendCommand(&c);\r |
0675f200 | 269 | \r |
1b492a97 | 270 | UsbCommand resp;\r |
902cb3c0 | 271 | if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r |
272 | isOK = resp.arg[0] & 0xff;\r | |
80b1b53f | 273 | if (uid != NULL) \r |
274 | memcpy(uid, resp.d.asBytes, 4);\r | |
275 | if (!isOK) \r | |
276 | return 2;\r | |
0675f200 M |
277 | } else {\r |
278 | PrintAndLog("Command execute timeout");\r | |
279 | return 1;\r | |
280 | }\r | |
281 | return 0;\r | |
282 | }\r | |
545a1f38 M |
283 | \r |
284 | int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r | |
285 | uint8_t isOK = 0;\r | |
286 | \r | |
9c7c222c | 287 | UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};\r |
545a1f38 M |
288 | SendCommand(&c);\r |
289 | \r | |
902cb3c0 | 290 | UsbCommand resp;\r |
291 | if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r | |
292 | isOK = resp.arg[0] & 0xff;\r | |
293 | memcpy(data, resp.d.asBytes, 16);\r | |
545a1f38 M |
294 | if (!isOK) return 2;\r |
295 | } else {\r | |
296 | PrintAndLog("Command execute timeout");\r | |
297 | return 1;\r | |
298 | }\r | |
299 | return 0;\r | |
300 | }\r | |
55acbb2a M |
301 | \r |
302 | // SNIFFER\r | |
303 | \r | |
e0c635d1 M |
304 | // constants\r |
305 | static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r | |
306 | \r | |
55acbb2a | 307 | // variables\r |
e4691591 | 308 | char logHexFileName[FILE_PATH_SIZE] = {0x00};\r |
e0c635d1 | 309 | static uint8_t traceCard[4096] = {0x00};\r |
e4691591 | 310 | static char traceFileName[FILE_PATH_SIZE] = {0x00};\r |
55acbb2a M |
311 | static int traceState = TRACE_IDLE;\r |
312 | static uint8_t traceCurBlock = 0;\r | |
313 | static uint8_t traceCurKey = 0;\r | |
314 | \r | |
315 | struct Crypto1State *traceCrypto1 = NULL;\r | |
316 | \r | |
046fd766 | 317 | struct Crypto1State *revstate = NULL;\r |
318 | \r | |
319 | uint64_t key = 0;\r | |
320 | uint32_t ks2 = 0;\r | |
321 | uint32_t ks3 = 0;\r | |
55acbb2a | 322 | \r |
046fd766 | 323 | uint32_t uid = 0; // serial number\r |
324 | uint32_t nt =0; // tag challenge\r | |
325 | uint32_t nr_enc =0; // encrypted reader challenge\r | |
326 | uint32_t ar_enc =0; // encrypted reader response\r | |
327 | uint32_t at_enc =0; // encrypted tag response\r | |
55acbb2a | 328 | \r |
e0c635d1 M |
329 | int isTraceCardEmpty(void) {\r |
330 | return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r | |
331 | }\r | |
55acbb2a | 332 | \r |
e0c635d1 M |
333 | int isBlockEmpty(int blockN) {\r |
334 | for (int i = 0; i < 16; i++) \r | |
335 | if (traceCard[blockN * 16 + i] != 0) return 0;\r | |
55acbb2a | 336 | \r |
e0c635d1 M |
337 | return 1;\r |
338 | }\r | |
339 | \r | |
340 | int isBlockTrailer(int blockN) {\r | |
341 | return ((blockN & 0x03) == 0x03);\r | |
342 | }\r | |
343 | \r | |
344 | int loadTraceCard(uint8_t *tuid) {\r | |
345 | FILE * f;\r | |
80b1b53f | 346 | char buf[64] = {0x00};\r |
347 | uint8_t buf8[64] = {0x00};\r | |
e0c635d1 M |
348 | int i, blockNum;\r |
349 | \r | |
80b1b53f | 350 | if (!isTraceCardEmpty()) \r |
351 | saveTraceCard();\r | |
352 | \r | |
55acbb2a M |
353 | memset(traceCard, 0x00, 4096);\r |
354 | memcpy(traceCard, tuid + 3, 4);\r | |
80b1b53f | 355 | \r |
e0c635d1 M |
356 | FillFileNameByUID(traceFileName, tuid, ".eml", 7);\r |
357 | \r | |
358 | f = fopen(traceFileName, "r");\r | |
664bb5ae | 359 | if (!f) return 1;\r |
e0c635d1 M |
360 | \r |
361 | blockNum = 0;\r | |
e4691591 | 362 | \r |
e0c635d1 | 363 | while(!feof(f)){\r |
e4691591 | 364 | \r |
e0c635d1 | 365 | memset(buf, 0, sizeof(buf));\r |
759c16b3 | 366 | if (fgets(buf, sizeof(buf), f) == NULL) {\r |
046fd766 | 367 | PrintAndLog("File reading error.");\r |
1b492a97 | 368 | fclose(f);\r |
759c16b3 | 369 | return 2;\r |
046fd766 | 370 | }\r |
e0c635d1 M |
371 | \r |
372 | if (strlen(buf) < 32){\r | |
373 | if (feof(f)) break;\r | |
374 | PrintAndLog("File content error. Block data must include 32 HEX symbols");\r | |
1b492a97 | 375 | fclose(f);\r |
e0c635d1 M |
376 | return 2;\r |
377 | }\r | |
378 | for (i = 0; i < 32; i += 2)\r | |
379 | sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);\r | |
380 | \r | |
381 | memcpy(traceCard + blockNum * 16, buf8, 16);\r | |
382 | \r | |
383 | blockNum++;\r | |
384 | }\r | |
385 | fclose(f);\r | |
386 | \r | |
387 | return 0;\r | |
388 | }\r | |
389 | \r | |
390 | int saveTraceCard(void) {\r | |
391 | FILE * f;\r | |
392 | \r | |
393 | if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r | |
394 | \r | |
395 | f = fopen(traceFileName, "w+");\r | |
664bb5ae | 396 | if ( !f ) return 1;\r |
e4691591 | 397 | \r |
e0c635d1 M |
398 | for (int i = 0; i < 64; i++) { // blocks\r |
399 | for (int j = 0; j < 16; j++) // bytes\r | |
400 | fprintf(f, "%02x", *(traceCard + i * 16 + j)); \r | |
401 | fprintf(f,"\n");\r | |
402 | }\r | |
403 | fclose(f);\r | |
e0c635d1 M |
404 | return 0;\r |
405 | }\r | |
406 | \r | |
407 | int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r | |
408 | \r | |
80b1b53f | 409 | if (traceCrypto1) \r |
410 | crypto1_destroy(traceCrypto1);\r | |
411 | \r | |
e0c635d1 M |
412 | traceCrypto1 = NULL;\r |
413 | \r | |
80b1b53f | 414 | if (wantSaveToEmlFile) \r |
415 | loadTraceCard(tuid);\r | |
416 | \r | |
55acbb2a M |
417 | traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];\r |
418 | traceCard[5] = sak;\r | |
419 | memcpy(&traceCard[6], atqa, 2);\r | |
420 | traceCurBlock = 0;\r | |
421 | uid = bytes_to_num(tuid + 3, 4);\r | |
422 | \r | |
423 | traceState = TRACE_IDLE;\r | |
424 | \r | |
425 | return 0;\r | |
426 | }\r | |
427 | \r | |
428 | void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){\r | |
429 | uint8_t bt = 0;\r | |
430 | int i;\r | |
431 | \r | |
432 | if (len != 1) {\r | |
433 | for (i = 0; i < len; i++)\r | |
434 | data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r | |
435 | } else {\r | |
436 | bt = 0;\r | |
437 | for (i = 0; i < 4; i++)\r | |
438 | bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;\r | |
439 | \r | |
440 | data[0] = bt;\r | |
441 | }\r | |
442 | return;\r | |
443 | }\r | |
444 | \r | |
445 | \r | |
a501c82b | 446 | int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {\r |
55acbb2a M |
447 | uint8_t data[64];\r |
448 | \r | |
449 | if (traceState == TRACE_ERROR) return 1;\r | |
450 | if (len > 64) {\r | |
451 | traceState = TRACE_ERROR;\r | |
452 | return 1;\r | |
453 | }\r | |
454 | \r | |
455 | memcpy(data, data_src, len);\r | |
456 | if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r | |
457 | mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r | |
458 | PrintAndLog("dec> %s", sprint_hex(data, len));\r | |
459 | AddLogHex(logHexFileName, "dec> ", data, len); \r | |
460 | }\r | |
461 | \r | |
462 | switch (traceState) {\r | |
463 | case TRACE_IDLE: \r | |
8b6a93df M |
464 | // check packet crc16!\r |
465 | if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {\r | |
466 | PrintAndLog("dec> CRC ERROR!!!");\r | |
467 | AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!"); \r | |
468 | traceState = TRACE_ERROR; // do not decrypt the next commands\r | |
469 | return 1;\r | |
470 | }\r | |
55acbb2a M |
471 | \r |
472 | // AUTHENTICATION\r | |
a61b4976 | 473 | if ((len == 4) && ((data[0] == 0x60) || (data[0] == 0x61))) {\r |
55acbb2a M |
474 | traceState = TRACE_AUTH1;\r |
475 | traceCurBlock = data[1];\r | |
476 | traceCurKey = data[0] == 60 ? 1:0;\r | |
477 | return 0;\r | |
478 | }\r | |
479 | \r | |
480 | // READ\r | |
481 | if ((len ==4) && ((data[0] == 0x30))) {\r | |
482 | traceState = TRACE_READ_DATA;\r | |
483 | traceCurBlock = data[1];\r | |
484 | return 0;\r | |
485 | }\r | |
486 | \r | |
487 | // WRITE\r | |
488 | if ((len ==4) && ((data[0] == 0xA0))) {\r | |
489 | traceState = TRACE_WRITE_OK;\r | |
490 | traceCurBlock = data[1];\r | |
491 | return 0;\r | |
492 | }\r | |
493 | \r | |
494 | // HALT\r | |
495 | if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {\r | |
496 | traceState = TRACE_ERROR; // do not decrypt the next commands\r | |
497 | return 0;\r | |
498 | }\r | |
499 | \r | |
500 | return 0;\r | |
501 | break;\r | |
502 | \r | |
503 | case TRACE_READ_DATA: \r | |
504 | if (len == 18) {\r | |
505 | traceState = TRACE_IDLE;\r | |
506 | \r | |
e0c635d1 M |
507 | if (isBlockTrailer(traceCurBlock)) {\r |
508 | memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);\r | |
509 | } else {\r | |
510 | memcpy(traceCard + traceCurBlock * 16, data, 16);\r | |
511 | }\r | |
512 | if (wantSaveToEmlFile) saveTraceCard();\r | |
55acbb2a M |
513 | return 0;\r |
514 | } else {\r | |
515 | traceState = TRACE_ERROR;\r | |
516 | return 1;\r | |
517 | }\r | |
518 | break;\r | |
519 | \r | |
520 | case TRACE_WRITE_OK: \r | |
a61b4976 | 521 | if ((len == 1) && (data[0] == 0x0a)) {\r |
55acbb2a M |
522 | traceState = TRACE_WRITE_DATA;\r |
523 | \r | |
524 | return 0;\r | |
525 | } else {\r | |
526 | traceState = TRACE_ERROR;\r | |
527 | return 1;\r | |
528 | }\r | |
529 | break;\r | |
530 | \r | |
531 | case TRACE_WRITE_DATA: \r | |
532 | if (len == 18) {\r | |
533 | traceState = TRACE_IDLE;\r | |
534 | \r | |
535 | memcpy(traceCard + traceCurBlock * 16, data, 16);\r | |
e0c635d1 | 536 | if (wantSaveToEmlFile) saveTraceCard();\r |
55acbb2a M |
537 | return 0;\r |
538 | } else {\r | |
539 | traceState = TRACE_ERROR;\r | |
540 | return 1;\r | |
541 | }\r | |
542 | break;\r | |
543 | \r | |
544 | case TRACE_AUTH1: \r | |
545 | if (len == 4) {\r | |
546 | traceState = TRACE_AUTH2;\r | |
55acbb2a M |
547 | nt = bytes_to_num(data, 4);\r |
548 | return 0;\r | |
549 | } else {\r | |
550 | traceState = TRACE_ERROR;\r | |
551 | return 1;\r | |
552 | }\r | |
553 | break;\r | |
554 | \r | |
555 | case TRACE_AUTH2: \r | |
556 | if (len == 8) {\r | |
557 | traceState = TRACE_AUTH_OK;\r | |
558 | \r | |
559 | nr_enc = bytes_to_num(data, 4);\r | |
560 | ar_enc = bytes_to_num(data + 4, 4);\r | |
561 | return 0;\r | |
562 | } else {\r | |
563 | traceState = TRACE_ERROR;\r | |
564 | return 1;\r | |
565 | }\r | |
566 | break;\r | |
567 | \r | |
568 | case TRACE_AUTH_OK: \r | |
569 | if (len ==4) {\r | |
570 | traceState = TRACE_IDLE;\r | |
571 | \r | |
572 | at_enc = bytes_to_num(data, 4);\r | |
573 | \r | |
574 | // decode key here)\r | |
a61b4976 | 575 | ks2 = ar_enc ^ prng_successor(nt, 64);\r |
576 | ks3 = at_enc ^ prng_successor(nt, 96);\r | |
577 | revstate = lfsr_recovery64(ks2, ks3);\r | |
578 | lfsr_rollback_word(revstate, 0, 0);\r | |
579 | lfsr_rollback_word(revstate, 0, 0);\r | |
580 | lfsr_rollback_word(revstate, nr_enc, 1);\r | |
581 | lfsr_rollback_word(revstate, uid ^ nt, 0);\r | |
582 | \r | |
046fd766 | 583 | crypto1_get_lfsr(revstate, &key);\r |
584 | printf("Key: %012"llx"\n",key);\r | |
585 | AddLogUint64(logHexFileName, "key: ", key); \r | |
55acbb2a | 586 | \r |
e0c635d1 M |
587 | int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r |
588 | if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r | |
589 | \r | |
55acbb2a | 590 | if (traceCurKey) {\r |
046fd766 | 591 | num_to_bytes(key, 6, traceCard + blockShift + 10);\r |
55acbb2a | 592 | } else {\r |
046fd766 | 593 | num_to_bytes(key, 6, traceCard + blockShift);\r |
55acbb2a | 594 | }\r |
e0c635d1 | 595 | if (wantSaveToEmlFile) saveTraceCard();\r |
55acbb2a M |
596 | \r |
597 | if (traceCrypto1) {\r | |
598 | crypto1_destroy(traceCrypto1);\r | |
599 | }\r | |
600 | \r | |
601 | // set cryptosystem state\r | |
602 | traceCrypto1 = lfsr_recovery64(ks2, ks3);\r | |
603 | \r | |
604 | // nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt;\r | |
605 | \r | |
046fd766 | 606 | /* traceCrypto1 = crypto1_create(key); // key in lfsr\r |
55acbb2a M |
607 | crypto1_word(traceCrypto1, nt ^ uid, 0);\r |
608 | crypto1_word(traceCrypto1, ar, 1);\r | |
609 | crypto1_word(traceCrypto1, 0, 0);\r | |
610 | crypto1_word(traceCrypto1, 0, 0);*/\r | |
611 | \r | |
612 | return 0;\r | |
613 | } else {\r | |
614 | traceState = TRACE_ERROR;\r | |
615 | return 1;\r | |
616 | }\r | |
617 | break;\r | |
618 | \r | |
619 | default: \r | |
620 | traceState = TRACE_ERROR;\r | |
621 | return 1;\r | |
622 | }\r | |
623 | \r | |
624 | return 0;\r | |
625 | }\r |