#include <pthread.h>\r
#include "mifarehost.h"\r
#include "proxmark3.h"\r
+//#include "radixsort.h"\r
+#include <time.h>\r
\r
// MIFARE\r
int compar_int(const void * a, const void * b) {\r
//return (*(uint64_t*)b - *(uint64_t*)a);\r
\r
// better:\r
- if (*(uint64_t*)b == *(uint64_t*)a) return 0;\r
- else if (*(uint64_t*)b > *(uint64_t*)a) return 1;\r
- else return -1;\r
+ if (*(uint64_t*)b > *(uint64_t*)a) return 1;\r
+ if (*(uint64_t*)b < *(uint64_t*)a) return -1; \r
+ return 0;\r
+\r
+ //return (*(uint64_t*)b > *(uint64_t*)a) - (*(uint64_t*)b < *(uint64_t*)a);\r
}\r
\r
// Compare 16 Bits out of cryptostate\r
int Compare16Bits(const void * a, const void * b) {\r
- if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;\r
- else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;\r
- else return -1;\r
+ if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1; \r
+ if ((*(uint64_t*)b & 0x00ff000000ff0000) < (*(uint64_t*)a & 0x00ff000000ff0000)) return -1;\r
+ return 0;\r
+\r
+/* return \r
+ ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000))\r
+ -\r
+ ((*(uint64_t*)b & 0x00ff000000ff0000) < (*(uint64_t*)a & 0x00ff000000ff0000))\r
+ ;\r
+*/\r
}\r
\r
typedef \r
// wrapper function for multi-threaded lfsr_recovery32\r
void* nested_worker_thread(void *arg)\r
{\r
+ clock_t t1 = clock();\r
struct Crypto1State *p1;\r
StateList_t *statelist = arg;\r
\r
- statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);\r
+ statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid); \r
+ \r
for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r
+ \r
statelist->len = p1 - statelist->head.slhead;\r
statelist->tail.sltail = --p1;\r
qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r
\r
+ \r
+ t1 = clock() - t1;\r
+ printf("lfsr_recovery32 takes %.0f ticks \n", (float)t1);\r
return statelist->head.slhead;\r
}\r
\r
int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate) \r
{\r
- uint16_t i, len;\r
+ uint16_t i;\r
uint32_t uid;\r
UsbCommand resp;\r
- \r
StateList_t statelists[2];\r
struct Crypto1State *p1, *p2, *p3, *p4;\r
\r
- // flush queue\r
- WaitForResponseTimeout(CMD_ACK,NULL,100);\r
- \r
UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r
memcpy(c.d.asBytes, key, 6);\r
+ clearCommandBuffer();\r
SendCommand(&c);\r
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) return -1;\r
\r
- if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
- len = resp.arg[1];\r
- if (len == 2) { \r
- memcpy(&uid, resp.d.asBytes, 4);\r
- PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);\r
- \r
- for (i = 0; i < 2; i++) {\r
- statelists[i].blockNo = resp.arg[2] & 0xff;\r
- statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r
- statelists[i].uid = uid;\r
-\r
- memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r
- memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r
- }\r
- }\r
- else {\r
- PrintAndLog("Got 0 keys from proxmark."); \r
- return 1;\r
- }\r
- }\r
+ // error during nested\r
+ if (resp.arg[0]) return resp.arg[0];\r
\r
- // calc keys\r
+ memcpy(&uid, resp.d.asBytes, 4);\r
+ \r
+ for (i = 0; i < 2; i++) {\r
+ statelists[i].blockNo = resp.arg[2] & 0xff;\r
+ statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r
+ statelists[i].uid = uid;\r
+ memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r
+ memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r
+ }\r
\r
+ // calc keys \r
pthread_t thread_id[2];\r
\r
// create and run worker threads\r
- for (i = 0; i < 2; i++) {\r
+ for (i = 0; i < 2; i++)\r
pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r
- }\r
- \r
+\r
// wait for threads to terminate:\r
- for (i = 0; i < 2; i++) {\r
+ for (i = 0; i < 2; i++)\r
pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r
- }\r
-\r
\r
// the first 16 Bits of the cryptostate already contain part of our key.\r
// Create the intersection of the two lists based on these 16 Bits and\r
// roll back the cryptostate\r
p1 = p3 = statelists[0].head.slhead; \r
p2 = p4 = statelists[1].head.slhead;\r
+\r
while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r
if (Compare16Bits(p1, p2) == 0) {\r
+ \r
struct Crypto1State savestate, *savep = &savestate;\r
savestate = *p1;\r
while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r
while (Compare16Bits(p1, p2) == 1) p2++;\r
}\r
}\r
+\r
p3->even = 0; p3->odd = 0;\r
p4->even = 0; p4->odd = 0;\r
statelists[0].len = p3 - statelists[0].head.slhead;\r
// intersection of both lists. Create the intersection:\r
qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compar_int);\r
qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compar_int);\r
-\r
+ \r
uint64_t *p5, *p6, *p7;\r
p5 = p7 = statelists[0].head.keyhead; \r
p6 = statelists[1].head.keyhead;\r
+ \r
while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) {\r
if (compar_int(p5, p6) == 0) {\r
*p7++ = *p5++;\r
}\r
}\r
statelists[0].len = p7 - statelists[0].head.keyhead;\r
- statelists[0].tail.keytail=--p7;\r
+ statelists[0].tail.keytail = --p7;\r
\r
+ uint32_t numOfCandidates = statelists[0].len;\r
+ if ( numOfCandidates == 0 ) goto out;\r
+ \r
memset(resultKey, 0, 6);\r
+ uint64_t key64 = 0;\r
+\r
// The list may still contain several key candidates. Test each of them with mfCheckKeys\r
- for (i = 0; i < statelists[0].len; i++) {\r
- uint8_t keyBlock[6];\r
- uint64_t key64;\r
+ // uint32_t max_keys = keycnt > (USB_CMD_DATA_SIZE/6) ? (USB_CMD_DATA_SIZE/6) : keycnt;\r
+ uint8_t keyBlock[USB_CMD_DATA_SIZE] = {0x00};\r
+\r
+ clock_t t1 = clock();\r
+ for (i = 0; i < numOfCandidates; ++i){\r
crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r
- num_to_bytes(key64, 6, keyBlock);\r
- key64 = 0;\r
- if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, 1, keyBlock, &key64)) {\r
- num_to_bytes(key64, 6, resultKey);\r
- break;\r
- }\r
+ num_to_bytes(key64, 6, keyBlock + i * 6);\r
+ }\r
+\r
+ if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, numOfCandidates, keyBlock, &key64)) { \r
+ free(statelists[0].head.slhead);\r
+ free(statelists[1].head.slhead);\r
+ num_to_bytes(key64, 6, resultKey);\r
+\r
+ t1 = clock() - t1;\r
+ printf("Check candidates takes %.0f ticks \n", (float)t1); \r
+ \r
+ PrintAndLog("UID: %08x target block:%3u key type: %c -- Found key [%012"llx"]",\r
+ uid,\r
+ (uint16_t)resp.arg[2] & 0xff,\r
+ (resp.arg[2] >> 8) ? 'B' : 'A',\r
+ key64\r
+ );\r
+ return -5;\r
}\r
\r
+out:\r
+ PrintAndLog("UID: %08x target block:%3u key type: %c",\r
+ uid,\r
+ (uint16_t)resp.arg[2] & 0xff,\r
+ (resp.arg[2] >> 8) ? 'B' : 'A'\r
+ ); \r
+\r
free(statelists[0].head.slhead);\r
free(statelists[1].head.slhead);\r
- \r
- return 0;\r
+ return -4;\r
}\r
\r
-int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
+int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
\r
*key = 0;\r
-\r
- UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};\r
+ UsbCommand c = {CMD_MIFARE_CHKKEYS, { (blockNo | (keyType<<8)), clear_trace, keycnt}};\r
memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
+ clearCommandBuffer();\r
SendCommand(&c);\r
-\r
UsbCommand resp;\r
- if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;\r
+ if (!WaitForResponseTimeout(CMD_ACK,&resp, 3000)) return 1;\r
if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
*key = bytes_to_num(resp.d.asBytes, 6);\r
return 0;\r
\r
int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
+ clearCommandBuffer();\r
SendCommand(&c);\r
-\r
UsbCommand resp;\r
if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\r
memcpy(data, resp.d.asBytes, blocksCount * 16);\r
}\r
\r
int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
- UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r
- memcpy(c.d.asBytes, data, blocksCount * 16); \r
+ return mfEmlSetMem_xt(data, blockNum, blocksCount, 16);\r
+}\r
+\r
+int mfEmlSetMem_xt(uint8_t *data, int blockNum, int blocksCount, int blockBtWidth) {\r
+ UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, blockBtWidth}};\r
+ memcpy(c.d.asBytes, data, blocksCount * blockBtWidth); \r
+\r
+ clearCommandBuffer();\r
SendCommand(&c);\r
return 0;\r
}\r
\r
// "MAGIC" CARD\r
\r
-int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) {\r
+int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, uint8_t wipecard) {\r
+\r
+ uint8_t params = MAGIC_SINGLE;\r
uint8_t block0[16];\r
- memset(block0, 0, 16);\r
+ memset(block0, 0x00, sizeof(block0));\r
+\r
+ int old = mfCGetBlock(0, block0, params);\r
+ if (old == 0)\r
+ PrintAndLog("old block 0: %s", sprint_hex(block0, sizeof(block0)));\r
+ else \r
+ PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0."); \r
+\r
+ // fill in the new values\r
+ // UID\r
memcpy(block0, uid, 4); \r
- block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // Mifare UID BCC\r
- // mifare classic SAK(byte 5) and ATQA(byte 6 and 7)\r
- block0[5] = 0x88;\r
- block0[6] = 0x04;\r
- block0[7] = 0x00;\r
+ // Mifare UID BCC\r
+ block0[4] = block0[0]^block0[1]^block0[2]^block0[3];\r
+ // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)\r
+ if ( sak != NULL )\r
+ block0[5]=sak[0];\r
\r
- return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);\r
+ if ( atqa != NULL ) {\r
+ block0[6]=atqa[1];\r
+ block0[7]=atqa[0];\r
+ }\r
+ PrintAndLog("new block 0: %s", sprint_hex(block0,16));\r
+ \r
+ if ( wipecard ) params |= MAGIC_WIPE; \r
+ if ( oldUID == NULL) params |= MAGIC_UID;\r
+ \r
+ return mfCSetBlock(0, block0, oldUID, params);\r
}\r
\r
-int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, int wantWipe, uint8_t params) {\r
- uint8_t isOK = 0;\r
+int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, uint8_t params) {\r
\r
- UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r
+ uint8_t isOK = 0;\r
+ UsbCommand c = {CMD_MIFARE_CSETBLOCK, {params, blockNo, 0}};\r
memcpy(c.d.asBytes, data, 16); \r
+ clearCommandBuffer();\r
SendCommand(&c);\r
-\r
- UsbCommand resp;\r
- if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
+ UsbCommand resp;\r
+ if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
isOK = resp.arg[0] & 0xff;\r
- if (uid != NULL) memcpy(uid, resp.d.asBytes, 4);\r
- if (!isOK) return 2;\r
+ if (uid != NULL) \r
+ memcpy(uid, resp.d.asBytes, 4);\r
+ if (!isOK) \r
+ return 2;\r
} else {\r
PrintAndLog("Command execute timeout");\r
return 1;\r
\r
int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
uint8_t isOK = 0;\r
-\r
- UsbCommand c = {CMD_MIFARE_EML_CGETBLOCK, {params, 0, blockNo}};\r
+ UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, blockNo, 0}}; \r
+ clearCommandBuffer();\r
SendCommand(&c);\r
-\r
- UsbCommand resp;\r
+ UsbCommand resp;\r
if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
isOK = resp.arg[0] & 0xff;\r
memcpy(data, resp.d.asBytes, 16);\r
static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
\r
// variables\r
-char logHexFileName[200] = {0x00};\r
+char logHexFileName[FILE_PATH_SIZE] = {0x00};\r
static uint8_t traceCard[4096] = {0x00};\r
-static char traceFileName[200] = {0x00};\r
+static char traceFileName[FILE_PATH_SIZE] = {0x00};\r
static int traceState = TRACE_IDLE;\r
static uint8_t traceCurBlock = 0;\r
static uint8_t traceCurKey = 0;\r
\r
struct Crypto1State *traceCrypto1 = NULL;\r
\r
-struct Crypto1State *revstate;\r
-uint64_t lfsr;\r
-uint32_t ks2;\r
-uint32_t ks3;\r
+struct Crypto1State *revstate = NULL;\r
+\r
+uint64_t key = 0;\r
+uint32_t ks2 = 0;\r
+uint32_t ks3 = 0;\r
\r
-uint32_t uid; // serial number\r
-uint32_t nt; // tag challenge\r
-uint32_t nt_par; \r
-uint32_t nr_enc; // encrypted reader challenge\r
-uint32_t ar_enc; // encrypted reader response\r
-uint32_t nr_ar_par; \r
-uint32_t at_enc; // encrypted tag response\r
-uint32_t at_par; \r
+uint32_t uid = 0; // serial number\r
+uint32_t nt =0; // tag challenge\r
+uint32_t nr_enc =0; // encrypted reader challenge\r
+uint32_t ar_enc =0; // encrypted reader response\r
+uint32_t at_enc =0; // encrypted tag response\r
\r
int isTraceCardEmpty(void) {\r
return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
}\r
\r
int isBlockTrailer(int blockN) {\r
- return ((blockN & 0x03) == 0x03);\r
+ return ((blockN & 0x03) == 0x03);\r
}\r
\r
int loadTraceCard(uint8_t *tuid) {\r
FILE * f;\r
- char buf[64];\r
- uint8_t buf8[64];\r
+ char buf[64] = {0x00};\r
+ uint8_t buf8[64] = {0x00};\r
int i, blockNum;\r
\r
- if (!isTraceCardEmpty()) saveTraceCard();\r
+ if (!isTraceCardEmpty()) \r
+ saveTraceCard();\r
+ \r
memset(traceCard, 0x00, 4096);\r
memcpy(traceCard, tuid + 3, 4);\r
+\r
FillFileNameByUID(traceFileName, tuid, ".eml", 7);\r
\r
f = fopen(traceFileName, "r");\r
if (!f) return 1;\r
\r
blockNum = 0;\r
+ \r
while(!feof(f)){\r
+ \r
memset(buf, 0, sizeof(buf));\r
if (fgets(buf, sizeof(buf), f) == NULL) {\r
- PrintAndLog("File reading error.");\r
+ PrintAndLog("File reading error.");\r
+ fclose(f);\r
return 2;\r
- }\r
+ }\r
\r
if (strlen(buf) < 32){\r
if (feof(f)) break;\r
PrintAndLog("File content error. Block data must include 32 HEX symbols");\r
+ fclose(f);\r
return 2;\r
}\r
for (i = 0; i < 32; i += 2)\r
if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
\r
f = fopen(traceFileName, "w+");\r
+ if ( !f ) return 1;\r
+ \r
for (int i = 0; i < 64; i++) { // blocks\r
for (int j = 0; j < 16; j++) // bytes\r
fprintf(f, "%02x", *(traceCard + i * 16 + j)); \r
fprintf(f,"\n");\r
}\r
fclose(f);\r
-\r
return 0;\r
}\r
\r
int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r
\r
- if (traceCrypto1) crypto1_destroy(traceCrypto1);\r
+ if (traceCrypto1) \r
+ crypto1_destroy(traceCrypto1);\r
+\r
traceCrypto1 = NULL;\r
\r
- if (wantSaveToEmlFile) loadTraceCard(tuid);\r
+ if (wantSaveToEmlFile) \r
+ loadTraceCard(tuid);\r
+ \r
traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];\r
traceCard[5] = sak;\r
memcpy(&traceCard[6], atqa, 2);\r
for (i = 0; i < len; i++)\r
data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r
} else {\r
- bt = 0;\r
- for (i = 0; i < 4; i++)\r
- bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;\r
- \r
+ bt = 0; \r
+ bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 0)) << 0;\r
+ bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 1)) << 1;\r
+ bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 2)) << 2;\r
+ bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 3)) << 3; \r
data[0] = bt;\r
}\r
return;\r
}\r
\r
-\r
-int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEmlFile) {\r
+int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {\r
+ \r
uint8_t data[64];\r
\r
if (traceState == TRACE_ERROR) return 1;\r
+ \r
if (len > 64) {\r
traceState = TRACE_ERROR;\r
return 1;\r
case TRACE_AUTH1: \r
if (len == 4) {\r
traceState = TRACE_AUTH2;\r
-\r
nt = bytes_to_num(data, 4);\r
- nt_par = parity;\r
return 0;\r
} else {\r
traceState = TRACE_ERROR;\r
\r
nr_enc = bytes_to_num(data, 4);\r
ar_enc = bytes_to_num(data + 4, 4);\r
- nr_ar_par = parity;\r
return 0;\r
} else {\r
traceState = TRACE_ERROR;\r
traceState = TRACE_IDLE;\r
\r
at_enc = bytes_to_num(data, 4);\r
- at_par = parity;\r
\r
// decode key here)\r
ks2 = ar_enc ^ prng_successor(nt, 64);\r
lfsr_rollback_word(revstate, nr_enc, 1);\r
lfsr_rollback_word(revstate, uid ^ nt, 0);\r
\r
- crypto1_get_lfsr(revstate, &lfsr);\r
- printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));\r
- AddLogUint64(logHexFileName, "key> ", lfsr); \r
+ crypto1_get_lfsr(revstate, &key);\r
+ printf("Key: %012"llx"\n",key);\r
+ AddLogUint64(logHexFileName, "key: ", key); \r
\r
int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r
if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r
\r
if (traceCurKey) {\r
- num_to_bytes(lfsr, 6, traceCard + blockShift + 10);\r
+ num_to_bytes(key, 6, traceCard + blockShift + 10);\r
} else {\r
- num_to_bytes(lfsr, 6, traceCard + blockShift);\r
+ num_to_bytes(key, 6, traceCard + blockShift);\r
}\r
if (wantSaveToEmlFile) saveTraceCard();\r
\r
\r
// nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt;\r
\r
- /* traceCrypto1 = crypto1_create(lfsr); // key in lfsr\r
+ /* traceCrypto1 = crypto1_create(key); // key in lfsr\r
crypto1_word(traceCrypto1, nt ^ uid, 0);\r
crypto1_word(traceCrypto1, ar, 1);\r
crypto1_word(traceCrypto1, 0, 0);\r
\r
return 0;\r
}\r
+\r
+int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){\r
+ /*\r
+ uint32_t nt; // tag challenge\r
+ uint32_t nr_enc; // encrypted reader challenge\r
+ uint32_t ar_enc; // encrypted reader response\r
+ uint32_t at_enc; // encrypted tag response\r
+ */\r
+ struct Crypto1State *pcs = NULL;\r
+ \r
+ ks2 = ar_enc ^ prng_successor(nt, 64);\r
+ ks3 = at_enc ^ prng_successor(nt, 96);\r
+ \r
+ PrintAndLog("Decrypting data with:");\r
+ PrintAndLog(" nt: %08x",nt);\r
+ PrintAndLog(" ar_enc: %08x",ar_enc);\r
+ PrintAndLog(" at_enc: %08x",at_enc);\r
+ PrintAndLog("\nEncrypted data: [%s]", sprint_hex(data,len) );\r
+\r
+ pcs = lfsr_recovery64(ks2, ks3);\r
+ mf_crypto1_decrypt(pcs, data, len, FALSE);\r
+ PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) );\r
+ crypto1_destroy(pcs);\r
+ return 0;\r
+}\r
projects / proxmark3-svn / blobdiff