-// Merlok, 2011, 2012\r
-// people from mifare@nethemba.com, 2010\r
-//\r
-// This code is licensed to you under the terms of the GNU GPL, version 2 or,\r
-// at your option, any later version. See the LICENSE.txt file for the text of\r
-// the license.\r
-//-----------------------------------------------------------------------------\r
-// 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
-\r
-#include "crapto1/crapto1.h"\r
-#include "comms.h"\r
-#include "usb_cmd.h"\r
-#include "cmdmain.h"\r
-#include "ui.h"\r
-#include "parity.h"\r
-#include "util.h"\r
-#include "iso14443crc.h"\r
-\r
-#include "mifare.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 (*(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 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, uint32_t ar, uint64_t par_info, uint64_t ks_info, uint64_t **keys) {\r
- struct Crypto1State *states;\r
- uint32_t i, pos;\r
- uint8_t bt, ks3x[8], par[8][8];\r
- uint64_t key_recovered;\r
- uint64_t *keylist;\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, ar, 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, ar = 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 = (uint32_t)bytes_to_num(resp.d.asBytes + 24, 4);\r
- ar = (uint32_t)bytes_to_num(resp.d.asBytes + 28, 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
- }\r
- c.arg[0] = false;\r
-\r
- keycount = nonce2key(uid, nt, nr, ar, 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
- if (par_list == 0) {\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
-\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 (par_list == 0) {\r
- num_to_bytes(last_keylist[i*max_keys + j], 6, keyBlock+(j*6));\r
- } else {\r
- num_to_bytes(keylist[i*max_keys + j], 6, keyBlock+(j*6));\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
-int mfCheckKeysSec(uint8_t sectorCnt, uint8_t keyType, uint8_t timeout14a, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, sector_t * e_sector){\r
-\r
- uint8_t keyPtr = 0;\r
-\r
- if (e_sector == NULL)\r
- return -1;\r
-\r
- UsbCommand c = {CMD_MIFARE_CHKKEYS, {((sectorCnt & 0xff) | ((keyType & 0xff) << 8)), (clear_trace | 0x02)|((timeout14a & 0xff) << 8), keycnt}}; \r
- memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
- SendCommand(&c);\r
-\r
- UsbCommand resp;\r
- if (!WaitForResponseTimeoutW(CMD_ACK, &resp, MAX(3000, 1000 + 13 * sectorCnt * keycnt * (keyType == 2 ? 2 : 1)), false)) return 1; // timeout: 13 ms / fail auth\r
- if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
- \r
- bool foundAKey = false;\r
- for(int sec = 0; sec < sectorCnt; sec++){\r
- for(int keyAB = 0; keyAB < 2; keyAB++){\r
- keyPtr = *(resp.d.asBytes + keyAB * 40 + sec);\r
- if (keyPtr){\r
- e_sector[sec].foundKey[keyAB] = true;\r
- e_sector[sec].Key[keyAB] = bytes_to_num(keyBlock + (keyPtr - 1) * 6, 6);\r
- foundAKey = true;\r
- }\r
- }\r
- }\r
- return foundAKey ? 0 : 3;\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
-}\r
-\r
-typedef\r
- struct {\r
- union {\r
- struct Crypto1State *slhead;\r
- uint64_t *keyhead;\r
- } head;\r
- union {\r
- struct Crypto1State *sltail;\r
- uint64_t *keytail;\r
- } tail;\r
- uint32_t len;\r
- uint32_t uid;\r
- uint32_t blockNo;\r
- uint32_t keyType;\r
- uint32_t nt;\r
- uint32_t ks1;\r
- } StateList_t;\r
-\r
-\r
-// wrapper function for multi-threaded lfsr_recovery32\r
-void\r
-#ifdef __has_attribute\r
-#if __has_attribute(force_align_arg_pointer)\r
-__attribute__((force_align_arg_pointer)) \r
-#endif\r
-#endif\r
-*nested_worker_thread(void *arg)\r
-{\r
- struct Crypto1State *p1;\r
- StateList_t *statelist = arg;\r
-\r
- statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);\r
- for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\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
- return statelist->head.slhead;\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
-{\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
- (void)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
- return -1;\r
- }\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
-\r
- pthread_t thread_id[2];\r
-\r
- // create and run worker threads\r
- for (i = 0; i < 2; i++) {\r
- pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r
- }\r
-\r
- // wait for threads to terminate:\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
- while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r
- if (Compare16Bits(p1, p2) == 0) {\r
- struct Crypto1State savestate, *savep = &savestate;\r
- savestate = *p1;\r
- while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r
- *p3 = *p1;\r
- lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0);\r
- p3++;\r
- p1++;\r
- }\r
- savestate = *p2;\r
- while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) {\r
- *p4 = *p2;\r
- lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0);\r
- p4++;\r
- p2++;\r
- }\r
- }\r
- else {\r
- while (Compare16Bits(p1, p2) == -1) p1++;\r
- while (Compare16Bits(p1, p2) == 1) p2++;\r
- }\r
- }\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
- statelists[1].tail.sltail=--p4;\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), 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
- for (i = 0; i < statelists[0].len; i++) {\r
- uint8_t keyBlock[6];\r
- uint64_t key64;\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, false, 1, keyBlock, &key64)) {\r
- num_to_bytes(key64, 6, resultKey);\r
- break;\r
- }\r
- }\r
-\r
- free(statelists[0].head.slhead);\r
- free(statelists[1].head.slhead);\r
-\r
- return 0;\r
-}\r
-\r
-// EMULATOR\r
-\r
-int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
- UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\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
- return 0;\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
- SendCommand(&c);\r
- return 0;\r
-}\r
-\r
-// "MAGIC" CARD\r
-\r
-int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
- uint8_t isOK = 0;\r
-\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
- memcpy(data, resp.d.asBytes, 16);\r
- if (!isOK) return 2;\r
- } else {\r
- PrintAndLog("Command execute timeout");\r
- return 1;\r
- }\r
- return 0;\r
-}\r
-\r
-int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {\r
-\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
- 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
-\r
- return 0;\r
-}\r
-\r
-int mfCWipe(uint32_t numSectors, bool gen1b, bool wantWipe, bool wantFill) {\r
- uint8_t isOK = 0;\r
- uint8_t cmdParams = wantWipe + wantFill * 0x02 + gen1b * 0x04;\r
- UsbCommand c = {CMD_MIFARE_CWIPE, {numSectors, cmdParams, 0}};\r
- SendCommand(&c);\r
-\r
- UsbCommand resp;\r
- WaitForResponse(CMD_ACK,&resp);\r
- isOK = resp.arg[0] & 0xff;\r
- \r
- return isOK;\r
-}\r
-\r
-int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID) {\r
- uint8_t oldblock0[16] = {0x00};\r
- uint8_t block0[16] = {0x00};\r
- int gen = 0, res;\r
-\r
- gen = mfCIdentify();\r
-\r
- /* generation 1a magic card by default */\r
- uint8_t cmdParams = CSETBLOCK_SINGLE_OPER;\r
- if (gen == 2) {\r
- /* generation 1b magic card */\r
- cmdParams = CSETBLOCK_SINGLE_OPER | CSETBLOCK_MAGIC_1B;\r
- }\r
- \r
- res = mfCGetBlock(0, oldblock0, cmdParams);\r
-\r
- if (res == 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
-\r
- res = mfCSetBlock(0, block0, oldUID, false, cmdParams);\r
- if (res) {\r
- PrintAndLog("Can't set block 0. Error: %d", res);\r
- return res;\r
- }\r
- \r
- return 0;\r
-}\r
-\r
-int mfCIdentify() {\r
- UsbCommand c = {CMD_MIFARE_CIDENT, {0, 0, 0}};\r
- SendCommand(&c);\r
- UsbCommand resp;\r
- WaitForResponse(CMD_ACK,&resp);\r
-\r
- uint8_t isGeneration = resp.arg[0] & 0xff;\r
- switch( isGeneration ){\r
- case 1: PrintAndLog("Chinese magic backdoor commands (GEN 1a) detected"); break;\r
- case 2: PrintAndLog("Chinese magic backdoor command (GEN 1b) detected"); break;\r
- default: PrintAndLog("No chinese magic backdoor command detected"); break;\r
- }\r
-\r
- return (int) isGeneration;\r
-}\r
-\r
-\r
-// SNIFFER\r
-\r
-// constants\r
-static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
-\r
-// variables\r
-char logHexFileName[FILE_PATH_SIZE] = {0x00};\r
-static uint8_t traceCard[4096] = {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
-uint64_t ui64Key;\r
-uint32_t ks2;\r
-uint32_t ks3;\r
-\r
-uint32_t uid; // serial number\r
-uint32_t nt; // tag challenge\r
-uint32_t nt_enc; // encrypted tag challenge\r
-uint8_t nt_enc_par; // encrypted tag challenge parity\r
-uint32_t nr_enc; // encrypted reader challenge\r
-uint32_t ar_enc; // encrypted reader response\r
-uint8_t ar_enc_par; // encrypted reader response parity\r
-uint32_t at_enc; // encrypted tag response\r
-uint8_t at_enc_par; // encrypted tag response parity\r
-\r
-int isTraceCardEmpty(void) {\r
- return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
-}\r
-\r
-int isBlockEmpty(int blockN) {\r
- for (int i = 0; i < 16; i++)\r
- if (traceCard[blockN * 16 + i] != 0) return 0;\r
-\r
- return 1;\r
-}\r
-\r
-int isBlockTrailer(int blockN) {\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
- if (i < 63)\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] = {0x00};\r
- uint8_t buf8[64] = {0x00};\r
- int i, blockNum;\r
-\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
- fclose(f);\r
- return 2;\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
- sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);\r
-\r
- memcpy(traceCard + blockNum * 16, buf8, 16);\r
-\r
- blockNum++;\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)\r
- crypto1_destroy(traceCrypto1);\r
-\r
- traceCrypto1 = NULL;\r
-\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
- traceCurBlock = 0;\r
- uid = bytes_to_num(tuid + 3, 4);\r
-\r
- traceState = TRACE_IDLE;\r
-\r
- return 0;\r
-}\r
-\r
-void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){\r
- uint8_t bt = 0;\r
- int i;\r
-\r
- if (len != 1) {\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
- data[0] = bt;\r
- }\r
- return;\r
-}\r
-\r
-bool NTParityCheck(uint32_t ntx) {\r
- if (\r
- (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((nt_enc_par >> 5) & 0x01) ^ (nt_enc & 0x01)) ||\r
- (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((nt_enc_par >> 6) & 0x01) ^ (nt_enc >> 8 & 0x01)) ||\r
- (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((nt_enc_par >> 7) & 0x01) ^ (nt_enc >> 16 & 0x01))\r
- )\r
- return false;\r
- \r
- uint32_t ar = prng_successor(ntx, 64);\r
- if (\r
- (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ar_enc_par >> 5) & 0x01) ^ (ar_enc & 0x01)) ||\r
- (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ar_enc_par >> 6) & 0x01) ^ (ar_enc >> 8 & 0x01)) ||\r
- (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ar_enc_par >> 7) & 0x01) ^ (ar_enc >> 16 & 0x01))\r
- )\r
- return false;\r
-\r
- uint32_t at = prng_successor(ntx, 96);\r
- if (\r
- (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ar_enc_par >> 4) & 0x01) ^ (at_enc >> 24 & 0x01)) ||\r
- (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((at_enc_par >> 5) & 0x01) ^ (at_enc & 0x01)) ||\r
- (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((at_enc_par >> 6) & 0x01) ^ (at_enc >> 8 & 0x01)) ||\r
- (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((at_enc_par >> 7) & 0x01) ^ (at_enc >> 16 & 0x01))\r
- )\r
- return false;\r
- \r
- return true;\r
-}\r
-\r
-\r
-int mfTraceDecode(uint8_t *data_src, int len, uint8_t parity, bool wantSaveToEmlFile) {\r
- uint8_t data[64];\r
-\r
- if (traceState == TRACE_ERROR) return 1;\r
- if (len > 64) {\r
- traceState = TRACE_ERROR;\r
- return 1;\r
- }\r
-\r
- memcpy(data, data_src, len);\r
- if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r
- mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
- uint8_t parity[16];\r
- oddparitybuf(data, len, parity);\r
- PrintAndLog("dec> %s [%s]", sprint_hex(data, len), printBitsPar(parity, len));\r
- AddLogHex(logHexFileName, "dec> ", data, len);\r
- }\r
-\r
- switch (traceState) {\r
- case TRACE_IDLE:\r
- // check packet crc16!\r
- if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {\r
- PrintAndLog("dec> CRC ERROR!!!");\r
- AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!");\r
- traceState = TRACE_ERROR; // do not decrypt the next commands\r
- return 1;\r
- }\r
-\r
- // AUTHENTICATION\r
- if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {\r
- traceState = TRACE_AUTH1;\r
- traceCurBlock = data[1];\r
- traceCurKey = data[0] == 60 ? 1:0;\r
- return 0;\r
- }\r
-\r
- // READ\r
- if ((len ==4) && ((data[0] == 0x30))) {\r
- traceState = TRACE_READ_DATA;\r
- traceCurBlock = data[1];\r
- return 0;\r
- }\r
-\r
- // WRITE\r
- if ((len ==4) && ((data[0] == 0xA0))) {\r
- traceState = TRACE_WRITE_OK;\r
- traceCurBlock = data[1];\r
- return 0;\r
- }\r
-\r
- // HALT\r
- if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {\r
- traceState = TRACE_ERROR; // do not decrypt the next commands\r
- return 0;\r
- }\r
-\r
- return 0;\r
- break;\r
-\r
- case TRACE_READ_DATA:\r
- if (len == 18) {\r
- traceState = TRACE_IDLE;\r
-\r
- if (isBlockTrailer(traceCurBlock)) {\r
- memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);\r
- } else {\r
- memcpy(traceCard + traceCurBlock * 16, data, 16);\r
- }\r
- if (wantSaveToEmlFile) saveTraceCard();\r
- return 0;\r
- } else {\r
- traceState = TRACE_ERROR;\r
- return 1;\r
- }\r
- break;\r
-\r
- case TRACE_WRITE_OK:\r
- if ((len == 1) && (data[0] == 0x0a)) {\r
- traceState = TRACE_WRITE_DATA;\r
-\r
- return 0;\r
- } else {\r
- traceState = TRACE_ERROR;\r
- return 1;\r
- }\r
- break;\r
-\r
- case TRACE_WRITE_DATA:\r
- if (len == 18) {\r
- traceState = TRACE_IDLE;\r
-\r
- memcpy(traceCard + traceCurBlock * 16, data, 16);\r
- if (wantSaveToEmlFile) saveTraceCard();\r
- return 0;\r
- } else {\r
- traceState = TRACE_ERROR;\r
- return 1;\r
- }\r
- break;\r
-\r
- case TRACE_AUTH1:\r
- if (len == 4) {\r
- traceState = TRACE_AUTH2;\r
- if (!traceCrypto1) {\r
- nt = bytes_to_num(data, 4);\r
- } else {\r
- nt_enc = bytes_to_num(data, 4);\r
- nt_enc_par = parity;\r
- }\r
- return 0;\r
- } else {\r
- traceState = TRACE_ERROR;\r
- return 1;\r
- }\r
- break;\r
-\r
- case TRACE_AUTH2:\r
- if (len == 8) {\r
- traceState = TRACE_AUTH_OK;\r
-\r
- nr_enc = bytes_to_num(data, 4);\r
- ar_enc = bytes_to_num(data + 4, 4);\r
- ar_enc_par = parity << 4;\r
- return 0;\r
- } else {\r
- traceState = TRACE_ERROR;\r
- return 1;\r
- }\r
- break;\r
-\r
- case TRACE_AUTH_OK:\r
- if (len ==4) {\r
- traceState = TRACE_IDLE;\r
-\r
- at_enc = bytes_to_num(data, 4);\r
- at_enc_par = parity;\r
- if (!traceCrypto1) {\r
-\r
- // decode key here)\r
- ks2 = ar_enc ^ prng_successor(nt, 64);\r
- ks3 = at_enc ^ prng_successor(nt, 96);\r
- revstate = lfsr_recovery64(ks2, ks3);\r
- lfsr_rollback_word(revstate, 0, 0);\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
- crypto1_destroy(revstate);\r
- ui64Key = lfsr;\r
- printf("key> probable key:%x%x Prng:%s ks2:%08x ks3:%08x\n", \r
- (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF), \r
- validate_prng_nonce(nt) ? "WEAK": "HARDEND",\r
- ks2,\r
- ks3);\r
- AddLogUint64(logHexFileName, "key> ", lfsr);\r
- } else {\r
- if (validate_prng_nonce(nt)) {\r
- struct Crypto1State *pcs;\r
- pcs = crypto1_create(ui64Key);\r
- uint32_t nt1 = crypto1_word(pcs, nt_enc ^ uid, 1) ^ nt_enc;\r
- uint32_t ar = prng_successor(nt1, 64);\r
- uint32_t at = prng_successor(nt1, 96);\r
- printf("key> nested auth uid: %08x nt: %08x nt_parity: %s ar: %08x at: %08x\n", uid, nt1, printBitsPar(&nt_enc_par, 4), ar, at);\r
- uint32_t nr1 = crypto1_word(pcs, nr_enc, 1) ^ nr_enc;\r
- uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ar_enc;\r
- uint32_t at1 = crypto1_word(pcs, 0, 0) ^ at_enc;\r
- crypto1_destroy(pcs);\r
- printf("key> the same key test. nr1: %08x ar1: %08x at1: %08x \n", nr1, ar1, at1);\r
-\r
- if (NTParityCheck(nt1))\r
- printf("key> the same key test OK. key=%x%x\n", (unsigned int)((ui64Key & 0xFFFFFFFF00000000) >> 32), (unsigned int)(ui64Key & 0xFFFFFFFF));\r
- else\r
- printf("key> the same key test. check nt parity error.\n");\r
- \r
- uint32_t ntc = prng_successor(nt, 90);\r
- uint32_t ntx = 0;\r
- int ntcnt = 0;\r
- for (int i = 0; i < 16383; i++) {\r
- ntc = prng_successor(ntc, 1);\r
- if (NTParityCheck(ntc)){\r
- if (!ntcnt)\r
- ntx = ntc;\r
- ntcnt++;\r
- } \r
- }\r
- if (ntcnt)\r
- printf("key> nt candidate=%08x nonce distance=%d candidates count=%d\n", ntx, nonce_distance(nt, ntx), ntcnt);\r
- else\r
- printf("key> don't have any nt candidate( \n");\r
-\r
- nt = ntx;\r
- ks2 = ar_enc ^ prng_successor(ntx, 64);\r
- ks3 = at_enc ^ prng_successor(ntx, 96);\r
-\r
- // decode key\r
- revstate = lfsr_recovery64(ks2, ks3);\r
- lfsr_rollback_word(revstate, 0, 0);\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
- crypto1_destroy(revstate);\r
- ui64Key = lfsr;\r
- printf("key> probable key:%x%x ks2:%08x ks3:%08x\n", \r
- (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),\r
- ks2,\r
- ks3);\r
- AddLogUint64(logHexFileName, "key> ", lfsr);\r
- } else { \r
- printf("key> hardnested not implemented!\n");\r
- \r
- crypto1_destroy(traceCrypto1);\r
-\r
- // not implemented\r
- traceState = TRACE_ERROR;\r
- }\r
- }\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
- } else {\r
- num_to_bytes(lfsr, 6, traceCard + blockShift);\r
- }\r
- if (wantSaveToEmlFile) saveTraceCard();\r
-\r
- if (traceCrypto1) {\r
- crypto1_destroy(traceCrypto1);\r
- }\r
-\r
- // set cryptosystem state\r
- traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
- return 0;\r
- } else {\r
- traceState = TRACE_ERROR;\r
- return 1;\r
- }\r
- break;\r
-\r
- default:\r
- traceState = TRACE_ERROR;\r
- return 1;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-// DECODING\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
-\r
-/** validate_prng_nonce\r
- * Determine if nonce is deterministic. ie: Suspectable to Darkside attack.\r
- * returns\r
- * true = weak prng\r
- * false = hardend prng\r
- */\r
-bool validate_prng_nonce(uint32_t nonce) {\r
- uint16_t *dist = 0;\r
- uint16_t x, i;\r
-\r
- dist = malloc(2 << 16);\r
- if(!dist)\r
- return -1;\r
-\r
- // init prng table:\r
- for (x = i = 1; i; ++i) {\r
- dist[(x & 0xff) << 8 | x >> 8] = i;\r
- x = x >> 1 | (x ^ x >> 2 ^ x >> 3 ^ x >> 5) << 15;\r
- }\r
- \r
- uint32_t res = (65535 - dist[nonce >> 16] + dist[nonce & 0xffff]) % 65535;\r
- \r
- free(dist); \r
- return (res == 16);\r
-}\r
-\r
-/* Detect Tag Prng, \r
-* function performs a partial AUTH, where it tries to authenticate against block0, key A, but only collects tag nonce.\r
-* the tag nonce is check to see if it has a predictable PRNG.\r
-* @returns \r
-* TRUE if tag uses WEAK prng (ie Now the NACK bug also needs to be present for Darkside attack)\r
-* FALSE is tag uses HARDEND prng (ie hardnested attack possible, with known key)\r
-*/\r
-int DetectClassicPrng(void){\r
-\r
- UsbCommand resp, respA; \r
- uint8_t cmd[] = {0x60, 0x00}; // MIFARE_AUTH_KEYA\r
- uint32_t flags = ISO14A_CONNECT | ISO14A_RAW | ISO14A_APPEND_CRC | ISO14A_NO_RATS;\r
- \r
- UsbCommand c = {CMD_READER_ISO_14443a, {flags, sizeof(cmd), 0}};\r
- memcpy(c.d.asBytes, cmd, sizeof(cmd));\r
-\r
- clearCommandBuffer();\r
- SendCommand(&c);\r
- if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {\r
- PrintAndLog("PRNG UID: Reply timeout.");\r
- return -1;\r
- }\r
- \r
- // if select tag failed.\r
- if (resp.arg[0] == 0) {\r
- PrintAndLog("PRNG error: selecting tag failed, can't detect prng.");\r
- return -1;\r
- }\r
- \r
- if (!WaitForResponseTimeout(CMD_ACK, &respA, 5000)) {\r
- PrintAndLog("PRNG data: Reply timeout.");\r
- return -1;\r
- }\r
-\r
- // check respA\r
- if (respA.arg[0] != 4) {\r
- PrintAndLog("PRNG data error: Wrong length: %d", respA.arg[0]);\r
- return -1;\r
- }\r
-\r
- uint32_t nonce = bytes_to_num(respA.d.asBytes, respA.arg[0]);\r
- return validate_prng_nonce(nonce);\r
-}\r
projects / proxmark3-svn / commitdiff