// mifare commands\r
//-----------------------------------------------------------------------------\r
\r
+#include "mifarehost.h"\r
+\r
#include <stdio.h>\r
#include <stdlib.h> \r
#include <string.h>\r
#include <pthread.h>\r
-#include "mifarehost.h"\r
-#include "proxmark3.h"\r
\r
-// MIFARE\r
-int compar_int(const void * a, const void * b) {\r
+#include "crapto1/crapto1.h"\r
+#include "proxmark3.h"\r
+#include "usb_cmd.h"\r
+#include "cmdmain.h"\r
+#include "ui.h"\r
+#include "util.h"\r
+#include "iso14443crc.h"\r
+\r
+// mifare tracer flags used in mfTraceDecode()\r
+#define TRACE_IDLE 0x00\r
+#define TRACE_AUTH1 0x01\r
+#define TRACE_AUTH2 0x02\r
+#define TRACE_AUTH_OK 0x03\r
+#define TRACE_READ_DATA 0x04\r
+#define TRACE_WRITE_OK 0x05\r
+#define TRACE_WRITE_DATA 0x06\r
+#define TRACE_ERROR 0xFF\r
+\r
+\r
+static int compare_uint64(const void *a, const void *b) {\r
// didn't work: (the result is truncated to 32 bits)\r
- //return (*(uint64_t*)b - *(uint64_t*)a);\r
+ //return (*(int64_t*)b - *(int64_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 if (*(uint64_t*)b < *(uint64_t*)a) return 1;\r
else return -1;\r
}\r
\r
\r
+// 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
+static uint32_t intersection(uint64_t *list1, uint64_t *list2)\r
+{\r
+ if (list1 == NULL || list2 == NULL) {\r
+ return 0;\r
+ }\r
+ uint64_t *p1, *p2, *p3;\r
+ p1 = p3 = list1; \r
+ p2 = list2;\r
+\r
+ while ( *p1 != -1 && *p2 != -1 ) {\r
+ if (compare_uint64(p1, p2) == 0) {\r
+ *p3++ = *p1++;\r
+ p2++;\r
+ }\r
+ else {\r
+ while (compare_uint64(p1, p2) < 0) ++p1;\r
+ while (compare_uint64(p1, p2) > 0) ++p2;\r
+ }\r
+ }\r
+ *p3 = -1;\r
+ return p3 - list1;\r
+}\r
+\r
+\r
+// Darkside attack (hf mf mifare)\r
+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
+ struct Crypto1State *states;\r
+ uint32_t i, pos, rr; //nr_diff;\r
+ uint8_t bt, ks3x[8], par[8][8];\r
+ uint64_t key_recovered;\r
+ static uint64_t *keylist;\r
+ rr = 0;\r
+\r
+ // Reset the last three significant bits of the reader nonce\r
+ nr &= 0xffffff1f;\r
+\r
+ for (pos=0; pos<8; pos++) {\r
+ ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;\r
+ bt = (par_info >> (pos*8)) & 0xff;\r
+ for (i=0; i<8; i++) {\r
+ par[7-pos][i] = (bt >> i) & 0x01;\r
+ }\r
+ }\r
+\r
+ states = lfsr_common_prefix(nr, rr, ks3x, par, (par_info == 0));\r
+\r
+ if (states == NULL) {\r
+ *keys = NULL;\r
+ return 0;\r
+ }\r
+\r
+ keylist = (uint64_t*)states;\r
+ \r
+ for (i = 0; keylist[i]; i++) {\r
+ lfsr_rollback_word(states+i, uid^nt, 0);\r
+ crypto1_get_lfsr(states+i, &key_recovered);\r
+ keylist[i] = key_recovered;\r
+ }\r
+ keylist[i] = -1;\r
+\r
+ *keys = keylist;\r
+ return i;\r
+}\r
+\r
+\r
+int mfDarkside(uint64_t *key)\r
+{\r
+ uint32_t uid = 0;\r
+ uint32_t nt = 0, nr = 0;\r
+ uint64_t par_list = 0, ks_list = 0;\r
+ uint64_t *keylist = NULL, *last_keylist = NULL;\r
+ uint32_t keycount = 0;\r
+ int16_t isOK = 0;\r
+\r
+ UsbCommand c = {CMD_READER_MIFARE, {true, 0, 0}};\r
+\r
+ // message\r
+ printf("-------------------------------------------------------------------------\n");\r
+ printf("Executing command. Expected execution time: 25sec on average\n");\r
+ printf("Press button on the proxmark3 device to abort both proxmark3 and client.\n");\r
+ printf("-------------------------------------------------------------------------\n");\r
+\r
+ \r
+ while (true) {\r
+ clearCommandBuffer();\r
+ SendCommand(&c);\r
+ \r
+ //flush queue\r
+ while (ukbhit()) {\r
+ int c = getchar(); (void) c;\r
+ }\r
+ \r
+ // wait cycle\r
+ while (true) {\r
+ printf(".");\r
+ fflush(stdout);\r
+ if (ukbhit()) {\r
+ return -5;\r
+ break;\r
+ }\r
+ \r
+ UsbCommand resp;\r
+ if (WaitForResponseTimeout(CMD_ACK, &resp, 1000)) {\r
+ isOK = resp.arg[0];\r
+ if (isOK < 0) {\r
+ return isOK;\r
+ }\r
+ uid = (uint32_t)bytes_to_num(resp.d.asBytes + 0, 4);\r
+ nt = (uint32_t)bytes_to_num(resp.d.asBytes + 4, 4);\r
+ par_list = bytes_to_num(resp.d.asBytes + 8, 8);\r
+ ks_list = bytes_to_num(resp.d.asBytes + 16, 8);\r
+ nr = bytes_to_num(resp.d.asBytes + 24, 4);\r
+ break;\r
+ }\r
+ } \r
+\r
+ if (par_list == 0 && c.arg[0] == true) {\r
+ PrintAndLog("Parity is all zero. Most likely this card sends NACK on every failed authentication.");\r
+ PrintAndLog("Attack will take a few seconds longer because we need two consecutive successful runs.");\r
+ }\r
+ c.arg[0] = false;\r
+\r
+ keycount = nonce2key(uid, nt, nr, par_list, ks_list, &keylist);\r
+\r
+ if (keycount == 0) {\r
+ PrintAndLog("Key not found (lfsr_common_prefix list is null). Nt=%08x", nt); \r
+ PrintAndLog("This is expected to happen in 25%% of all cases. Trying again with a different reader nonce...");\r
+ continue;\r
+ }\r
+\r
+ qsort(keylist, keycount, sizeof(*keylist), compare_uint64);\r
+ keycount = intersection(last_keylist, keylist);\r
+ if (keycount == 0) {\r
+ free(last_keylist);\r
+ last_keylist = keylist;\r
+ continue;\r
+ }\r
+\r
+ if (keycount > 1) {\r
+ PrintAndLog("Found %u possible keys. Trying to authenticate with each of them ...\n", keycount);\r
+ } else {\r
+ PrintAndLog("Found a possible key. Trying to authenticate...\n");\r
+ } \r
+\r
+ *key = -1;\r
+ uint8_t keyBlock[USB_CMD_DATA_SIZE];\r
+ int max_keys = USB_CMD_DATA_SIZE/6;\r
+ for (int i = 0; i < keycount; i += max_keys) {\r
+ int size = keycount - i > max_keys ? max_keys : keycount - i;\r
+ for (int j = 0; j < size; j++) {\r
+ if (last_keylist == NULL) {\r
+ num_to_bytes(keylist[i*max_keys + j], 6, keyBlock);\r
+ } else {\r
+ num_to_bytes(last_keylist[i*max_keys + j], 6, keyBlock);\r
+ }\r
+ }\r
+ if (!mfCheckKeys(0, 0, false, size, keyBlock, key)) {\r
+ break;\r
+ }\r
+ } \r
+ \r
+ if (*key != -1) {\r
+ free(last_keylist);\r
+ free(keylist);\r
+ break;\r
+ } else {\r
+ PrintAndLog("Authentication failed. Trying again...");\r
+ free(last_keylist);\r
+ last_keylist = keylist;\r
+ }\r
+ }\r
+ \r
+ return 0;\r
+}\r
+\r
+\r
+int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
+\r
+ *key = -1;\r
+\r
+ UsbCommand c = {CMD_MIFARE_CHKKEYS, {((blockNo & 0xff) | ((keyType&0xff)<<8)), clear_trace, keycnt}};\r
+ memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
+ SendCommand(&c);\r
+\r
+ UsbCommand resp;\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
\r
// Compare 16 Bits out of cryptostate\r
int Compare16Bits(const void * a, const void * b) {\r
else return -1;\r
}\r
\r
-\r
typedef \r
struct {\r
union {\r
return statelist->head.slhead;\r
}\r
\r
-\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
+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
- \r
StateList_t statelists[2];\r
struct Crypto1State *p1, *p2, *p3, *p4;\r
\r
// flush queue\r
- WaitForResponseTimeout(CMD_ACK,NULL,100);\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
SendCommand(&c);\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
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
+ return -1;\r
+ }\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
+ if (resp.arg[0]) {\r
+ return resp.arg[0]; // error during nested\r
+ }\r
+ \r
+ memcpy(&uid, resp.d.asBytes, 4);\r
+ PrintAndLog("uid:%08x trgbl=%d trgkey=%x", uid, (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
+ 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
while (Compare16Bits(p1, p2) == 1) p2++;\r
}\r
}\r
- p3->even = 0; p3->odd = 0;\r
- p4->even = 0; p4->odd = 0;\r
+ *(uint64_t*)p3 = -1;\r
+ *(uint64_t*)p4 = -1;\r
statelists[0].len = p3 - statelists[0].head.slhead;\r
statelists[1].len = p4 - statelists[1].head.slhead;\r
statelists[0].tail.sltail=--p3;\r
\r
// the statelists now contain possible keys. The key we are searching for must be in the\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
- uint64_t *p5, *p6, *p7;\r
- p5 = p7 = statelists[0].head.keyhead; \r
- p6 = statelists[1].head.keyhead;\r
- while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) {\r
- if (compar_int(p5, p6) == 0) {\r
- *p7++ = *p5++;\r
- p6++;\r
- }\r
- else {\r
- while (compar_int(p5, p6) == -1) p5++;\r
- while (compar_int(p5, p6) == 1) p6++;\r
- }\r
- }\r
- statelists[0].len = p7 - statelists[0].head.keyhead;\r
- statelists[0].tail.keytail=--p7;\r
+ qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compare_uint64);\r
+ qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compare_uint64);\r
+ statelists[0].len = intersection(statelists[0].head.keyhead, statelists[1].head.keyhead);\r
\r
memset(resultKey, 0, 6);\r
// The list may still contain several key candidates. Test each of them with mfCheckKeys\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
+ if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, 1, keyBlock, &key64)) {\r
num_to_bytes(key64, 6, resultKey);\r
break;\r
}\r
return 0;\r
}\r
\r
-int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
-\r
- *key = 0;\r
-\r
- UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};\r
- memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
- SendCommand(&c);\r
-\r
- UsbCommand resp;\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
-\r
// EMULATOR\r
\r
int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
\r
// "MAGIC" CARD\r
\r
-int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) {\r
- uint8_t block0[16];\r
- memset(block0, 0, 16);\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
- \r
- return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);\r
-}\r
-\r
-int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, int wantWipe, uint8_t params) {\r
+int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
uint8_t isOK = 0;\r
\r
- UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r
- memcpy(c.d.asBytes, data, 16); \r
+ UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};\r
SendCommand(&c);\r
\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
+ memcpy(data, resp.d.asBytes, 16);\r
if (!isOK) return 2;\r
} else {\r
PrintAndLog("Command execute timeout");\r
return 0;\r
}\r
\r
-int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
- uint8_t isOK = 0;\r
+int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {\r
\r
- UsbCommand c = {CMD_MIFARE_EML_CGETBLOCK, {params, 0, blockNo}};\r
+ uint8_t isOK = 0;\r
+ UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r
+ memcpy(c.d.asBytes, data, 16); \r
SendCommand(&c);\r
\r
UsbCommand resp;\r
if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
isOK = resp.arg[0] & 0xff;\r
- memcpy(data, resp.d.asBytes, 16);\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
return 0;\r
}\r
\r
+int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, bool wantWipe) {\r
+ uint8_t oldblock0[16] = {0x00};\r
+ uint8_t block0[16] = {0x00};\r
+\r
+ int old = mfCGetBlock(0, oldblock0, CSETBLOCK_SINGLE_OPER);\r
+ if (old == 0) {\r
+ memcpy(block0, oldblock0, 16);\r
+ PrintAndLog("old block 0: %s", sprint_hex(block0,16));\r
+ } else {\r
+ PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");\r
+ }\r
+\r
+ // fill in the new values\r
+ // UID\r
+ memcpy(block0, uid, 4); \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
+ 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
+ return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);\r
+}\r
+\r
// SNIFFER\r
\r
// constants\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] = {0};\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
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
\r
int isTraceCardEmpty(void) {\r
return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
return ((blockN & 0x03) == 0x03);\r
}\r
\r
+int saveTraceCard(void) {\r
+ FILE * f;\r
+ \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
+ return 0;\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
return 0;\r
}\r
\r
-int saveTraceCard(void) {\r
- FILE * f;\r
- \r
- if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
- \r
- f = fopen(traceFileName, "w+");\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
}\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
uint8_t data[64];\r
\r
if (traceState == TRACE_ERROR) 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, 0, 0);\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
\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 ar_enc; // encrypted reader response\r
+ uint32_t at_enc; // encrypted tag response\r
+ */\r
+ if (traceCrypto1) {\r
+ crypto1_destroy(traceCrypto1);\r
+ }\r
+ ks2 = ar_enc ^ prng_successor(nt, 64);\r
+ ks3 = at_enc ^ prng_successor(nt, 96);\r
+ traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
+\r
+ mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
+\r
+ PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) );\r
+ crypto1_destroy(traceCrypto1);\r
+ return 0;\r
+}\r
projects / proxmark3-svn / blobdiff