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[proxmark3-svn] / client / mifarehost.c
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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
c9f8bc53 17//#include "radixsort.h"\r
838c15a6 18#include <time.h>\r
f397b5cc 19\r
55acbb2a 20// MIFARE\r
f397b5cc 21int 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
6b10e329 26 if (*(uint64_t*)b > *(uint64_t*)a) return 1;\r
838c15a6 27 if (*(uint64_t*)b < *(uint64_t*)a) return -1; \r
6b10e329 28 return 0;\r
838c15a6 29\r
30 //return (*(uint64_t*)b > *(uint64_t*)a) - (*(uint64_t*)b < *(uint64_t*)a);\r
f397b5cc
M
31}\r
32\r
9492e0b0 33// Compare 16 Bits out of cryptostate\r
34int Compare16Bits(const void * a, const void * b) {\r
6b10e329 35 if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1; \r
838c15a6 36 if ((*(uint64_t*)b & 0x00ff000000ff0000) < (*(uint64_t*)a & 0x00ff000000ff0000)) return -1;\r
6b10e329 37 return 0;\r
838c15a6 38\r
39/* return \r
d294f582 40 ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000))\r
41 -\r
42 ((*(uint64_t*)b & 0x00ff000000ff0000) < (*(uint64_t*)a & 0x00ff000000ff0000))\r
43 ;\r
838c15a6 44*/\r
f397b5cc
M
45}\r
46\r
9492e0b0 47typedef \r
48 struct {\r
49 union {\r
50 struct Crypto1State *slhead;\r
51 uint64_t *keyhead;\r
3f7c993d 52 } head;\r
9492e0b0 53 union {\r
54 struct Crypto1State *sltail;\r
55 uint64_t *keytail;\r
3f7c993d 56 } tail;\r
9492e0b0 57 uint32_t len;\r
58 uint32_t uid;\r
59 uint32_t blockNo;\r
60 uint32_t keyType;\r
61 uint32_t nt;\r
62 uint32_t ks1;\r
63 } StateList_t;\r
64\r
65\r
66// wrapper function for multi-threaded lfsr_recovery32\r
67void* nested_worker_thread(void *arg)\r
68{\r
69 struct Crypto1State *p1;\r
70 StateList_t *statelist = arg;\r
b882b543 71 statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid); \r
d294f582 72 \r
6b10e329 73 for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r
d294f582 74 \r
3f7c993d 75 statelist->len = p1 - statelist->head.slhead;\r
76 statelist->tail.sltail = --p1;\r
77 qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r
3f7c993d 78 return statelist->head.slhead;\r
f397b5cc
M
79}\r
80\r
9492e0b0 81int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate) \r
f397b5cc 82{\r
c830303d 83 uint16_t i;\r
f397b5cc 84 uint32_t uid;\r
902cb3c0 85 UsbCommand resp;\r
9492e0b0 86 StateList_t statelists[2];\r
87 struct Crypto1State *p1, *p2, *p3, *p4;\r
88 \r
9492e0b0 89 UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r
f397b5cc 90 memcpy(c.d.asBytes, key, 6);\r
952f3dc7 91 clearCommandBuffer();\r
9492e0b0 92 SendCommand(&c);\r
952f3dc7 93 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) return -1;\r
c830303d 94\r
952f3dc7 95 // error during nested\r
96 if (resp.arg[0]) return resp.arg[0];\r
97 \r
b882b543 98 memcpy(&uid, resp.d.asBytes, 4);\r
6b10e329 99 \r
100 for (i = 0; i < 2; i++) {\r
0de8e387 101 statelists[i].blockNo = resp.arg[2] & 0xff;\r
102 statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r
103 statelists[i].uid = uid;\r
104 memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r
105 memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r
106 }\r
f397b5cc 107 \r
d294f582 108 // calc keys \r
9492e0b0 109 pthread_t thread_id[2];\r
110 \r
111 // create and run worker threads\r
d294f582 112 for (i = 0; i < 2; i++)\r
9492e0b0 113 pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r
6b10e329 114\r
9492e0b0 115 // wait for threads to terminate:\r
d294f582 116 for (i = 0; i < 2; i++)\r
3f7c993d 117 pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r
f397b5cc 118\r
9492e0b0 119 // the first 16 Bits of the cryptostate already contain part of our key.\r
120 // Create the intersection of the two lists based on these 16 Bits and\r
121 // roll back the cryptostate\r
3f7c993d 122 p1 = p3 = statelists[0].head.slhead; \r
123 p2 = p4 = statelists[1].head.slhead;\r
6b10e329 124\r
3f7c993d 125 while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r
9492e0b0 126 if (Compare16Bits(p1, p2) == 0) {\r
6b10e329 127 \r
9492e0b0 128 struct Crypto1State savestate, *savep = &savestate;\r
129 savestate = *p1;\r
3f7c993d 130 while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r
9492e0b0 131 *p3 = *p1;\r
132 lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);\r
133 p3++;\r
134 p1++;\r
135 }\r
136 savestate = *p2;\r
3f7c993d 137 while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {\r
9492e0b0 138 *p4 = *p2;\r
139 lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);\r
140 p4++;\r
141 p2++;\r
142 }\r
143 }\r
144 else {\r
145 while (Compare16Bits(p1, p2) == -1) p1++;\r
146 while (Compare16Bits(p1, p2) == 1) p2++;\r
147 }\r
f397b5cc 148 }\r
838c15a6 149\r
9492e0b0 150 p3->even = 0; p3->odd = 0;\r
151 p4->even = 0; p4->odd = 0;\r
3f7c993d 152 statelists[0].len = p3 - statelists[0].head.slhead;\r
153 statelists[1].len = p4 - statelists[1].head.slhead;\r
154 statelists[0].tail.sltail=--p3;\r
155 statelists[1].tail.sltail=--p4;\r
9492e0b0 156\r
157 // the statelists now contain possible keys. The key we are searching for must be in the\r
158 // intersection of both lists. Create the intersection:\r
3f7c993d 159 qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compar_int);\r
160 qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compar_int);\r
838c15a6 161 \r
9492e0b0 162 uint64_t *p5, *p6, *p7;\r
3f7c993d 163 p5 = p7 = statelists[0].head.keyhead; \r
164 p6 = statelists[1].head.keyhead;\r
838c15a6 165 \r
3f7c993d 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
d294f582 177 statelists[0].tail.keytail = --p7;\r
9492e0b0 178\r
838c15a6 179 uint32_t numOfCandidates = statelists[0].len;\r
180 if ( numOfCandidates == 0 ) goto out;\r
181 \r
9492e0b0 182 memset(resultKey, 0, 6);\r
d294f582 183 uint64_t key64 = 0;\r
184\r
9492e0b0 185 // The list may still contain several key candidates. Test each of them with mfCheckKeys\r
6b10e329 186 // uint32_t max_keys = keycnt > (USB_CMD_DATA_SIZE/6) ? (USB_CMD_DATA_SIZE/6) : keycnt;\r
838c15a6 187 uint8_t keyBlock[USB_CMD_DATA_SIZE] = {0x00};\r
d294f582 188\r
838c15a6 189 for (i = 0; i < numOfCandidates; ++i){\r
190 crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r
191 num_to_bytes(key64, 6, keyBlock + i * 6);\r
192 }\r
6b10e329 193\r
838c15a6 194 if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, numOfCandidates, keyBlock, &key64)) { \r
195 free(statelists[0].head.slhead);\r
196 free(statelists[1].head.slhead);\r
197 num_to_bytes(key64, 6, resultKey);\r
d294f582 198\r
838c15a6 199 PrintAndLog("UID: %08x target block:%3u key type: %c -- Found key [%012"llx"]",\r
200 uid,\r
201 (uint16_t)resp.arg[2] & 0xff,\r
202 (resp.arg[2] >> 8) ? 'B' : 'A',\r
203 key64\r
204 );\r
205 return -5;\r
9492e0b0 206 }\r
838c15a6 207 \r
208out:\r
6b10e329 209 PrintAndLog("UID: %08x target block:%3u key type: %c",\r
b882b543 210 uid,\r
6b10e329 211 (uint16_t)resp.arg[2] & 0xff,\r
212 (resp.arg[2] >> 8) ? 'B' : 'A'\r
213 ); \r
214\r
3f7c993d 215 free(statelists[0].head.slhead);\r
d294f582 216 free(statelists[1].head.slhead);\r
217 return -4;\r
f397b5cc
M
218}\r
219\r
b10a759f 220int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
f397b5cc 221 *key = 0;\r
d294f582 222 UsbCommand c = {CMD_MIFARE_CHKKEYS, { (blockNo | (keyType<<8)), clear_trace, keycnt}};\r
f397b5cc 223 memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
0de8e387 224 clearCommandBuffer();\r
9492e0b0 225 SendCommand(&c);\r
902cb3c0 226 UsbCommand resp;\r
01c78dab 227 if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)) return 1;\r
902cb3c0 228 if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
229 *key = bytes_to_num(resp.d.asBytes, 6);\r
f397b5cc
M
230 return 0;\r
231}\r
8556b852 232\r
55acbb2a
M
233// EMULATOR\r
234\r
8556b852 235int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
545a1f38 236 UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
0de8e387 237 clearCommandBuffer();\r
902cb3c0 238 SendCommand(&c);\r
5c065fa0 239 UsbCommand resp;\r
902cb3c0 240 if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\r
241 memcpy(data, resp.d.asBytes, blocksCount * 16);\r
8556b852
M
242 return 0;\r
243}\r
244\r
245int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
0de8e387 246 return mfEmlSetMem_xt(data, blockNum, blocksCount, 16);\r
247}\r
248\r
249int mfEmlSetMem_xt(uint8_t *data, int blockNum, int blocksCount, int blockBtWidth) {\r
250 UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, blockBtWidth}};\r
251 memcpy(c.d.asBytes, data, blocksCount * blockBtWidth); \r
0de8e387 252 clearCommandBuffer();\r
545a1f38 253 SendCommand(&c);\r
8556b852
M
254 return 0;\r
255}\r
256\r
55acbb2a 257// "MAGIC" CARD\r
c2731f37 258int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, uint8_t wipecard) {\r
3bba7dea 259\r
c2731f37 260 uint8_t params = MAGIC_SINGLE;\r
261 uint8_t block0[16];\r
262 memset(block0, 0x00, sizeof(block0));\r
c2731f37 263\r
264 int old = mfCGetBlock(0, block0, params);\r
d294f582 265 if (old == 0)\r
c2731f37 266 PrintAndLog("old block 0: %s", sprint_hex(block0, sizeof(block0)));\r
d294f582 267 else \r
268 PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0."); \r
3bba7dea
JH
269\r
270 // fill in the new values\r
271 // UID\r
272 memcpy(block0, uid, 4); \r
273 // Mifare UID BCC\r
274 block0[4] = block0[0]^block0[1]^block0[2]^block0[3];\r
275 // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)\r
c2731f37 276 if ( sak != NULL )\r
3bba7dea 277 block0[5]=sak[0];\r
c2731f37 278 \r
279 if ( atqa != NULL ) {\r
3bba7dea
JH
280 block0[6]=atqa[1];\r
281 block0[7]=atqa[0];\r
80b1b53f 282 }\r
3bba7dea 283 PrintAndLog("new block 0: %s", sprint_hex(block0,16));\r
c2731f37 284 \r
285 if ( wipecard ) params |= MAGIC_WIPE; \r
286 if ( oldUID == NULL) params |= MAGIC_UID;\r
287 \r
288 return mfCSetBlock(0, block0, oldUID, params);\r
f774db95
M
289}\r
290\r
c2731f37 291int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, uint8_t params) {\r
0675f200 292\r
1b492a97 293 uint8_t isOK = 0;\r
c2731f37 294 UsbCommand c = {CMD_MIFARE_CSETBLOCK, {params, blockNo, 0}};\r
f774db95 295 memcpy(c.d.asBytes, data, 16); \r
0de8e387 296 clearCommandBuffer();\r
297 SendCommand(&c);\r
1b492a97 298 UsbCommand resp;\r
c2731f37 299 if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
902cb3c0 300 isOK = resp.arg[0] & 0xff;\r
80b1b53f 301 if (uid != NULL) \r
302 memcpy(uid, resp.d.asBytes, 4);\r
303 if (!isOK) \r
304 return 2;\r
0675f200
M
305 } else {\r
306 PrintAndLog("Command execute timeout");\r
307 return 1;\r
308 }\r
309 return 0;\r
310}\r
545a1f38
M
311\r
312int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
313 uint8_t isOK = 0;\r
c2731f37 314 UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, blockNo, 0}}; \r
0de8e387 315 clearCommandBuffer();\r
545a1f38 316 SendCommand(&c);\r
0de8e387 317 UsbCommand resp;\r
902cb3c0 318 if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
319 isOK = resp.arg[0] & 0xff;\r
320 memcpy(data, resp.d.asBytes, 16);\r
545a1f38
M
321 if (!isOK) return 2;\r
322 } else {\r
323 PrintAndLog("Command execute timeout");\r
324 return 1;\r
325 }\r
326 return 0;\r
327}\r
55acbb2a
M
328\r
329// SNIFFER\r
7ee74a8e 330// [iceman] so many global variables....\r
55acbb2a 331\r
e0c635d1
M
332// constants\r
333static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
334\r
55acbb2a 335// variables\r
e4691591 336char logHexFileName[FILE_PATH_SIZE] = {0x00};\r
e0c635d1 337static uint8_t traceCard[4096] = {0x00};\r
e4691591 338static char traceFileName[FILE_PATH_SIZE] = {0x00};\r
55acbb2a
M
339static int traceState = TRACE_IDLE;\r
340static uint8_t traceCurBlock = 0;\r
341static uint8_t traceCurKey = 0;\r
342\r
343struct Crypto1State *traceCrypto1 = NULL;\r
046fd766 344struct Crypto1State *revstate = NULL;\r
046fd766 345uint64_t key = 0;\r
346uint32_t ks2 = 0;\r
347uint32_t ks3 = 0;\r
55acbb2a 348\r
6c84c900 349uint32_t cuid = 0; // serial number\r
046fd766 350uint32_t nt =0; // tag challenge\r
351uint32_t nr_enc =0; // encrypted reader challenge\r
352uint32_t ar_enc =0; // encrypted reader response\r
353uint32_t at_enc =0; // encrypted tag response\r
55acbb2a 354\r
e0c635d1
M
355int isTraceCardEmpty(void) {\r
356 return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
357}\r
55acbb2a 358\r
e0c635d1
M
359int isBlockEmpty(int blockN) {\r
360 for (int i = 0; i < 16; i++) \r
361 if (traceCard[blockN * 16 + i] != 0) return 0;\r
55acbb2a 362\r
e0c635d1
M
363 return 1;\r
364}\r
365\r
366int isBlockTrailer(int blockN) {\r
d294f582 367 return ((blockN & 0x03) == 0x03);\r
e0c635d1
M
368}\r
369\r
6c84c900 370int loadTraceCard(uint8_t *tuid, uint8_t uidlen) {\r
e0c635d1 371 FILE * f;\r
80b1b53f 372 char buf[64] = {0x00};\r
373 uint8_t buf8[64] = {0x00};\r
e0c635d1
M
374 int i, blockNum;\r
375 \r
80b1b53f 376 if (!isTraceCardEmpty()) \r
377 saveTraceCard();\r
378 \r
55acbb2a 379 memset(traceCard, 0x00, 4096);\r
6c84c900 380 memcpy(traceCard, tuid, uidlen);\r
80b1b53f 381\r
6c84c900 382 FillFileNameByUID(traceFileName, tuid, ".eml", uidlen);\r
e0c635d1
M
383\r
384 f = fopen(traceFileName, "r");\r
664bb5ae 385 if (!f) return 1;\r
e0c635d1
M
386 \r
387 blockNum = 0;\r
e4691591 388 \r
e0c635d1 389 while(!feof(f)){\r
e4691591 390 \r
e0c635d1 391 memset(buf, 0, sizeof(buf));\r
759c16b3 392 if (fgets(buf, sizeof(buf), f) == NULL) {\r
6c84c900 393 PrintAndLog("No trace file found or reading error.");\r
1b492a97 394 fclose(f);\r
759c16b3 395 return 2;\r
046fd766 396 }\r
e0c635d1
M
397\r
398 if (strlen(buf) < 32){\r
399 if (feof(f)) break;\r
400 PrintAndLog("File content error. Block data must include 32 HEX symbols");\r
1b492a97 401 fclose(f);\r
e0c635d1
M
402 return 2;\r
403 }\r
404 for (i = 0; i < 32; i += 2)\r
6c84c900 405 sscanf(&buf[i], "%02X", (unsigned int *)&buf8[i / 2]);\r
e0c635d1
M
406\r
407 memcpy(traceCard + blockNum * 16, buf8, 16);\r
408\r
409 blockNum++;\r
410 }\r
411 fclose(f);\r
e0c635d1
M
412 return 0;\r
413}\r
414\r
415int saveTraceCard(void) {\r
e0c635d1
M
416 \r
417 if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
418 \r
6c84c900 419 FILE * f;\r
e0c635d1 420 f = fopen(traceFileName, "w+");\r
664bb5ae 421 if ( !f ) return 1;\r
e4691591 422 \r
e0c635d1
M
423 for (int i = 0; i < 64; i++) { // blocks\r
424 for (int j = 0; j < 16; j++) // bytes\r
6c84c900 425 fprintf(f, "%02X", *(traceCard + i * 16 + j)); \r
e0c635d1
M
426 fprintf(f,"\n");\r
427 }\r
6c84c900 428 fflush(f);\r
e0c635d1 429 fclose(f);\r
e0c635d1
M
430 return 0;\r
431}\r
432\r
6c84c900 433int mfTraceInit(uint8_t *tuid, uint8_t uidlen, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r
e0c635d1 434\r
80b1b53f 435 if (traceCrypto1) \r
436 crypto1_destroy(traceCrypto1);\r
437\r
e0c635d1
M
438 traceCrypto1 = NULL;\r
439\r
80b1b53f 440 if (wantSaveToEmlFile) \r
6c84c900 441 loadTraceCard(tuid, uidlen);\r
80b1b53f 442 \r
55acbb2a
M
443 traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];\r
444 traceCard[5] = sak;\r
445 memcpy(&traceCard[6], atqa, 2);\r
446 traceCurBlock = 0;\r
6c84c900 447 cuid = bytes_to_num(tuid+(uidlen-4), 4);\r
55acbb2a 448 traceState = TRACE_IDLE;\r
55acbb2a
M
449 return 0;\r
450}\r
451\r
452void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){\r
453 uint8_t bt = 0;\r
454 int i;\r
455 \r
456 if (len != 1) {\r
457 for (i = 0; i < len; i++)\r
458 data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r
459 } else {\r
d294f582 460 bt = 0; \r
461 bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 0)) << 0;\r
462 bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 1)) << 1;\r
463 bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 2)) << 2;\r
464 bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 3)) << 3; \r
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465 data[0] = bt;\r
466 }\r
467 return;\r
468}\r
469\r
a501c82b 470int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {\r
6c84c900 471\r
55acbb2a 472 if (traceState == TRACE_ERROR) return 1;\r
6c84c900 473\r
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474 if (len > 64) {\r
475 traceState = TRACE_ERROR;\r
476 return 1;\r
477 }\r
478 \r
6c84c900 479 uint8_t data[64];\r
480 memset(data, 0x00, sizeof(data));\r
481 \r
55acbb2a 482 memcpy(data, data_src, len);\r
6c84c900 483 \r
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484 if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r
485 mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
6c84c900 486 PrintAndLog("DEC| %s", sprint_hex(data, len));\r
487 AddLogHex(logHexFileName, "DEC| ", data, len); \r
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488 }\r
489 \r
490 switch (traceState) {\r
491 case TRACE_IDLE: \r
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492 // check packet crc16!\r
493 if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {\r
6c84c900 494 PrintAndLog("DEC| CRC ERROR!!!");\r
495 AddLogLine(logHexFileName, "DEC| ", "CRC ERROR!!!"); \r
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496 traceState = TRACE_ERROR; // do not decrypt the next commands\r
497 return 1;\r
498 }\r
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499 \r
500 // AUTHENTICATION\r
7ee74a8e 501 if ((len == 4) && ((data[0] == MIFARE_AUTH_KEYA) || (data[0] == MIFARE_AUTH_KEYB))) {\r
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502 traceState = TRACE_AUTH1;\r
503 traceCurBlock = data[1];\r
504 traceCurKey = data[0] == 60 ? 1:0;\r
505 return 0;\r
506 }\r
507\r
508 // READ\r
7ee74a8e 509 if ((len ==4) && ((data[0] == ISO14443A_CMD_READBLOCK))) {\r
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510 traceState = TRACE_READ_DATA;\r
511 traceCurBlock = data[1];\r
512 return 0;\r
513 }\r
514\r
515 // WRITE\r
7ee74a8e 516 if ((len ==4) && ((data[0] == ISO14443A_CMD_WRITEBLOCK))) {\r
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517 traceState = TRACE_WRITE_OK;\r
518 traceCurBlock = data[1];\r
519 return 0;\r
520 }\r
521\r
522 // HALT\r
7ee74a8e 523 if ((len ==4) && ((data[0] == ISO14443A_CMD_HALT) && (data[1] == 0x00))) {\r
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524 traceState = TRACE_ERROR; // do not decrypt the next commands\r
525 return 0;\r
526 }\r
55acbb2a 527 return 0;\r
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528 case TRACE_READ_DATA: \r
529 if (len == 18) {\r
530 traceState = TRACE_IDLE;\r
531\r
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532 if (isBlockTrailer(traceCurBlock)) {\r
533 memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);\r
534 } else {\r
535 memcpy(traceCard + traceCurBlock * 16, data, 16);\r
536 }\r
537 if (wantSaveToEmlFile) saveTraceCard();\r
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538 return 0;\r
539 } else {\r
540 traceState = TRACE_ERROR;\r
541 return 1;\r
542 }\r
6c84c900 543 break;\r
55acbb2a 544 case TRACE_WRITE_OK: \r
a61b4976 545 if ((len == 1) && (data[0] == 0x0a)) {\r
55acbb2a 546 traceState = TRACE_WRITE_DATA;\r
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547 return 0;\r
548 } else {\r
549 traceState = TRACE_ERROR;\r
550 return 1;\r
551 }\r
6c84c900 552 break;\r
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553 case TRACE_WRITE_DATA: \r
554 if (len == 18) {\r
555 traceState = TRACE_IDLE;\r
55acbb2a 556 memcpy(traceCard + traceCurBlock * 16, data, 16);\r
e0c635d1 557 if (wantSaveToEmlFile) saveTraceCard();\r
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558 return 0;\r
559 } else {\r
560 traceState = TRACE_ERROR;\r
561 return 1;\r
562 }\r
6c84c900 563 break;\r
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564 case TRACE_AUTH1: \r
565 if (len == 4) {\r
566 traceState = TRACE_AUTH2;\r
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567 nt = bytes_to_num(data, 4);\r
568 return 0;\r
569 } else {\r
570 traceState = TRACE_ERROR;\r
571 return 1;\r
572 }\r
6c84c900 573 break;\r
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574 case TRACE_AUTH2: \r
575 if (len == 8) {\r
576 traceState = TRACE_AUTH_OK;\r
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577 nr_enc = bytes_to_num(data, 4);\r
578 ar_enc = bytes_to_num(data + 4, 4);\r
579 return 0;\r
580 } else {\r
581 traceState = TRACE_ERROR;\r
582 return 1;\r
583 }\r
6c84c900 584 break;\r
55acbb2a 585 case TRACE_AUTH_OK: \r
6c84c900 586 if (len == 4) {\r
55acbb2a 587 traceState = TRACE_IDLE;\r
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588 at_enc = bytes_to_num(data, 4);\r
589 \r
590 // decode key here)\r
a61b4976 591 ks2 = ar_enc ^ prng_successor(nt, 64);\r
592 ks3 = at_enc ^ prng_successor(nt, 96);\r
593 revstate = lfsr_recovery64(ks2, ks3);\r
594 lfsr_rollback_word(revstate, 0, 0);\r
595 lfsr_rollback_word(revstate, 0, 0);\r
596 lfsr_rollback_word(revstate, nr_enc, 1);\r
6c84c900 597 lfsr_rollback_word(revstate, cuid ^ nt, 0);\r
046fd766 598 crypto1_get_lfsr(revstate, &key);\r
6c84c900 599 PrintAndLog("Found Key: [%012"llx"]", key);\r
600 \r
601 //if ( tryMfk64(cuid, nt, nr_enc, ar_enc, at_enc, &key) )\r
602 AddLogUint64(logHexFileName, "Found Key: ", key); \r
55acbb2a 603 \r
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604 int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r
605 if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r
606 \r
6c84c900 607 if (traceCurKey)\r
046fd766 608 num_to_bytes(key, 6, traceCard + blockShift + 10);\r
6c84c900 609 else\r
046fd766 610 num_to_bytes(key, 6, traceCard + blockShift);\r
6c84c900 611 \r
612 if (wantSaveToEmlFile)\r
613 saveTraceCard();\r
55acbb2a 614\r
6c84c900 615 if (traceCrypto1)\r
55acbb2a 616 crypto1_destroy(traceCrypto1);\r
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617 \r
618 // set cryptosystem state\r
619 traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
620 \r
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621 return 0;\r
622 } else {\r
623 traceState = TRACE_ERROR;\r
624 return 1;\r
625 }\r
6c84c900 626 break;\r
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627 default: \r
628 traceState = TRACE_ERROR;\r
629 return 1;\r
630 }\r
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631 return 0;\r
632}\r
e98572a1 633\r
634int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){\r
6c84c900 635 PrintAndLog("\nEncrypted data: [%s]", sprint_hex(data, len) );\r
3bc7b13d 636 struct Crypto1State *pcs = NULL;\r
e98572a1 637 ks2 = ar_enc ^ prng_successor(nt, 64);\r
638 ks3 = at_enc ^ prng_successor(nt, 96);\r
3bc7b13d 639 pcs = lfsr_recovery64(ks2, ks3);\r
640 mf_crypto1_decrypt(pcs, data, len, FALSE);\r
6c84c900 641 PrintAndLog("Decrypted data: [%s]", sprint_hex(data, len) );\r
3bc7b13d 642 crypto1_destroy(pcs);\r
e98572a1 643 return 0;\r
644}\r
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