X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0de8e3874d6524379550a50a4d9c29faf2d239ea..360caababff8eaed758d3d32864435185fd36eed:/client/mifarehost.c diff --git a/client/mifarehost.c b/client/mifarehost.c index d3f4a4cd..b7cd3b59 100644 --- a/client/mifarehost.c +++ b/client/mifarehost.c @@ -8,64 +8,47 @@ // mifare commands //----------------------------------------------------------------------------- -#include -#include -#include -#include #include "mifarehost.h" -#include "proxmark3.h" - -#define llx PRIx64 // MIFARE -int compar_int(const void * a, const void * b) { +extern int compar_int(const void * a, const void * b) { // didn't work: (the result is truncated to 32 bits) //return (*(uint64_t*)b - *(uint64_t*)a); // better: - if (*(uint64_t*)b == *(uint64_t*)a) return 0; - else if (*(uint64_t*)b > *(uint64_t*)a) return 1; - else return -1; + if (*(uint64_t*)b > *(uint64_t*)a) return 1; + if (*(uint64_t*)b < *(uint64_t*)a) return -1; + return 0; + + //return (*(uint64_t*)b > *(uint64_t*)a) - (*(uint64_t*)b < *(uint64_t*)a); } // Compare 16 Bits out of cryptostate int Compare16Bits(const void * a, const void * b) { - if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0; - else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1; - else return -1; + if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1; + if ((*(uint64_t*)b & 0x00ff000000ff0000) < (*(uint64_t*)a & 0x00ff000000ff0000)) return -1; + return 0; + +/* return + ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) + - + ((*(uint64_t*)b & 0x00ff000000ff0000) < (*(uint64_t*)a & 0x00ff000000ff0000)) + ; +*/ } -typedef - struct { - union { - struct Crypto1State *slhead; - uint64_t *keyhead; - } head; - union { - struct Crypto1State *sltail; - uint64_t *keytail; - } tail; - uint32_t len; - uint32_t uid; - uint32_t blockNo; - uint32_t keyType; - uint32_t nt; - uint32_t ks1; - } StateList_t; - - // wrapper function for multi-threaded lfsr_recovery32 void* nested_worker_thread(void *arg) { struct Crypto1State *p1; StateList_t *statelist = arg; - - statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid); + statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid); + for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++); + statelist->len = p1 - statelist->head.slhead; statelist->tail.sltail = --p1; qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits); - return statelist->head.slhead; } @@ -74,28 +57,20 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo uint16_t i; uint32_t uid; UsbCommand resp; - StateList_t statelists[2]; struct Crypto1State *p1, *p2, *p3, *p4; - // flush queue - WaitForResponseTimeout(CMD_ACK,NULL,100); - UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}}; memcpy(c.d.asBytes, key, 6); + clearCommandBuffer(); SendCommand(&c); + if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) return -1; - if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) { - return -1; - } - - if (resp.arg[0]) { - return resp.arg[0]; // error during nested - } - + // error during nested + if (resp.arg[0]) return resp.arg[0]; + memcpy(&uid, resp.d.asBytes, 4); - PrintAndLog("uid:%08x trgbl=%d trgkey=%x", uid, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8); - + for (i = 0; i < 2; i++) { statelists[i].blockNo = resp.arg[2] & 0xff; statelists[i].keyType = (resp.arg[2] >> 8) & 0xff; @@ -104,28 +79,26 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4); } - // calc keys - + // calc keys pthread_t thread_id[2]; // create and run worker threads - for (i = 0; i < 2; i++) { + for (i = 0; i < 2; i++) pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]); - } - + // wait for threads to terminate: - for (i = 0; i < 2; i++) { + for (i = 0; i < 2; i++) pthread_join(thread_id[i], (void*)&statelists[i].head.slhead); - } - // the first 16 Bits of the cryptostate already contain part of our key. // Create the intersection of the two lists based on these 16 Bits and // roll back the cryptostate p1 = p3 = statelists[0].head.slhead; p2 = p4 = statelists[1].head.slhead; + while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) { if (Compare16Bits(p1, p2) == 0) { + struct Crypto1State savestate, *savep = &savestate; savestate = *p1; while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) { @@ -147,21 +120,23 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo while (Compare16Bits(p1, p2) == 1) p2++; } } + p3->even = 0; p3->odd = 0; p4->even = 0; p4->odd = 0; statelists[0].len = p3 - statelists[0].head.slhead; statelists[1].len = p4 - statelists[1].head.slhead; - statelists[0].tail.sltail=--p3; - statelists[1].tail.sltail=--p4; + statelists[0].tail.sltail = --p3; + statelists[1].tail.sltail = --p4; // the statelists now contain possible keys. The key we are searching for must be in the // intersection of both lists. Create the intersection: qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compar_int); qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compar_int); - + uint64_t *p5, *p6, *p7; p5 = p7 = statelists[0].head.keyhead; p6 = statelists[1].head.keyhead; + while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) { if (compar_int(p5, p6) == 0) { *p7++ = *p5++; @@ -173,42 +148,108 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo } } statelists[0].len = p7 - statelists[0].head.keyhead; - statelists[0].tail.keytail=--p7; + statelists[0].tail.keytail = --p7; + uint32_t numOfCandidates = statelists[0].len; + if ( numOfCandidates == 0 ) goto out; + memset(resultKey, 0, 6); + uint64_t key64 = 0; + // The list may still contain several key candidates. Test each of them with mfCheckKeys - for (i = 0; i < statelists[0].len; i++) { - uint8_t keyBlock[6]; - uint64_t key64; + // uint32_t max_keys = keycnt > (USB_CMD_DATA_SIZE/6) ? (USB_CMD_DATA_SIZE/6) : keycnt; + uint8_t keyBlock[USB_CMD_DATA_SIZE] = {0x00}; + + for (i = 0; i < numOfCandidates; ++i){ crypto1_get_lfsr(statelists[0].head.slhead + i, &key64); - num_to_bytes(key64, 6, keyBlock); - key64 = 0; - if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, 1, keyBlock, &key64)) { - num_to_bytes(key64, 6, resultKey); - break; - } + num_to_bytes(key64, 6, keyBlock + i * 6); + } + + if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, numOfCandidates, keyBlock, &key64)) { + free(statelists[0].head.slhead); + free(statelists[1].head.slhead); + num_to_bytes(key64, 6, resultKey); + + PrintAndLog("UID: %08x target block:%3u key type: %c -- Found key [%012"llx"]", + uid, + (uint16_t)resp.arg[2] & 0xff, + (resp.arg[2] >> 8) ? 'B' : 'A', + key64 + ); + return -5; } +out: + PrintAndLog("UID: %08x target block:%3u key type: %c", + uid, + (uint16_t)resp.arg[2] & 0xff, + (resp.arg[2] >> 8) ? 'B' : 'A' + ); + free(statelists[0].head.slhead); - free(statelists[1].head.slhead); - return 0; + free(statelists[1].head.slhead); + return -4; } int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){ - *key = 0; - - UsbCommand c = {CMD_MIFARE_CHKKEYS, {((blockNo & 0xff) | ((keyType&0xff)<<8)), clear_trace, keycnt}}; + UsbCommand c = {CMD_MIFARE_CHKKEYS, { (blockNo | (keyType<<8)), clear_trace, keycnt}}; memcpy(c.d.asBytes, keyBlock, 6 * keycnt); - clearCommandBuffer(); SendCommand(&c); UsbCommand resp; - if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1; + if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)) return 1; if ((resp.arg[0] & 0xff) != 0x01) return 2; *key = bytes_to_num(resp.d.asBytes, 6); return 0; } +// PM3 imp of J-Run mf_key_brute (part 2) +// ref: https://github.com/J-Run/mf_key_brute +int mfKeyBrute(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint64_t *resultkey){ + + #define KEYS_IN_BLOCK 85 + #define KEYBLOCK_SIZE 510 + #define CANDIDATE_SIZE 0xFFFF * 6 + uint8_t found = FALSE; + uint64_t key64 = 0; + uint8_t candidates[CANDIDATE_SIZE] = {0x00}; + uint8_t keyBlock[KEYBLOCK_SIZE] = {0x00}; + + memset(candidates, 0, sizeof(candidates)); + memset(keyBlock, 0, sizeof(keyBlock)); + + // Generate all possible keys for the first two unknown bytes. + for (uint16_t i = 0; i < 0xFFFF; ++i) { + uint32_t j = i * 6; + candidates[0 + j] = i >> 8; + candidates[1 + j] = i; + candidates[2 + j] = key[2]; + candidates[3 + j] = key[3]; + candidates[4 + j] = key[4]; + candidates[5 + j] = key[5]; + } + uint32_t counter, i; + for ( i = 0, counter = 1; i < CANDIDATE_SIZE; i += KEYBLOCK_SIZE, ++counter){ + + key64 = 0; + + // copy candidatekeys to test key block + memcpy(keyBlock, candidates + i, KEYBLOCK_SIZE); + + // check a block of generated candidate keys. + if (!mfCheckKeys(blockNo, keyType, TRUE, KEYS_IN_BLOCK, keyBlock, &key64)) { + *resultkey = key64; + found = TRUE; + break; + } + + // progress + if ( counter % 20 == 0 ) + PrintAndLog("tried : %s.. \t %u keys", sprint_hex(candidates + i, 6), counter * KEYS_IN_BLOCK ); + } + return found; +} + // EMULATOR @@ -229,25 +270,23 @@ int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) { int mfEmlSetMem_xt(uint8_t *data, int blockNum, int blocksCount, int blockBtWidth) { UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, blockBtWidth}}; memcpy(c.d.asBytes, data, blocksCount * blockBtWidth); - clearCommandBuffer(); SendCommand(&c); return 0; } // "MAGIC" CARD +int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, uint8_t wipecard) { -int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, bool wantWipe) { - uint8_t oldblock0[16] = {0x00}; - uint8_t block0[16] = {0x00}; + uint8_t params = MAGIC_SINGLE; + uint8_t block0[16]; + memset(block0, 0x00, sizeof(block0)); - int old = mfCGetBlock(0, oldblock0, CSETBLOCK_SINGLE_OPER); - if (old == 0) { - memcpy(block0, oldblock0, 16); - PrintAndLog("old block 0: %s", sprint_hex(block0,16)); - } else { - PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0."); - } + int old = mfCGetBlock(0, block0, params); + if (old == 0) + PrintAndLog("old block 0: %s", sprint_hex(block0, sizeof(block0))); + else + PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0."); // fill in the new values // UID @@ -255,26 +294,30 @@ int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, bool w // Mifare UID BCC block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed) - if (sak!=NULL) + if ( sak != NULL ) block0[5]=sak[0]; - if (atqa!=NULL) { + + if ( atqa != NULL ) { block0[6]=atqa[1]; block0[7]=atqa[0]; } PrintAndLog("new block 0: %s", sprint_hex(block0,16)); - return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER); + + if ( wipecard ) params |= MAGIC_WIPE; + if ( oldUID == NULL) params |= MAGIC_UID; + + return mfCSetBlock(0, block0, oldUID, params); } -int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) { +int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, uint8_t params) { uint8_t isOK = 0; - UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}}; + UsbCommand c = {CMD_MIFARE_CSETBLOCK, {params, blockNo, 0}}; memcpy(c.d.asBytes, data, 16); - clearCommandBuffer(); SendCommand(&c); UsbCommand resp; - if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) { + if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) { isOK = resp.arg[0] & 0xff; if (uid != NULL) memcpy(uid, resp.d.asBytes, 4); @@ -289,9 +332,7 @@ int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uin int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) { uint8_t isOK = 0; - - UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}}; - + UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, blockNo, 0}}; clearCommandBuffer(); SendCommand(&c); UsbCommand resp; @@ -307,6 +348,7 @@ int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) { } // SNIFFER +// [iceman] so many global variables.... // constants static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00}; @@ -320,14 +362,12 @@ static uint8_t traceCurBlock = 0; static uint8_t traceCurKey = 0; struct Crypto1State *traceCrypto1 = NULL; - struct Crypto1State *revstate = NULL; - uint64_t key = 0; uint32_t ks2 = 0; uint32_t ks3 = 0; -uint32_t uid = 0; // serial number +uint32_t cuid = 0; // serial number uint32_t nt =0; // tag challenge uint32_t nr_enc =0; // encrypted reader challenge uint32_t ar_enc =0; // encrypted reader response @@ -345,10 +385,10 @@ int isBlockEmpty(int blockN) { } int isBlockTrailer(int blockN) { - return ((blockN & 0x03) == 0x03); + return ((blockN & 0x03) == 0x03); } -int loadTraceCard(uint8_t *tuid) { +int loadTraceCard(uint8_t *tuid, uint8_t uidlen) { FILE * f; char buf[64] = {0x00}; uint8_t buf8[64] = {0x00}; @@ -358,9 +398,9 @@ int loadTraceCard(uint8_t *tuid) { saveTraceCard(); memset(traceCard, 0x00, 4096); - memcpy(traceCard, tuid + 3, 4); + memcpy(traceCard, tuid, uidlen); - FillFileNameByUID(traceFileName, tuid, ".eml", 7); + FillFileNameByUID(traceFileName, tuid, ".eml", uidlen); f = fopen(traceFileName, "r"); if (!f) return 1; @@ -371,47 +411,59 @@ int loadTraceCard(uint8_t *tuid) { memset(buf, 0, sizeof(buf)); if (fgets(buf, sizeof(buf), f) == NULL) { - PrintAndLog("File reading error."); - fclose(f); + PrintAndLog("No trace file found or reading error."); + if (f) { + fclose(f); + f = NULL; + } return 2; } if (strlen(buf) < 32){ if (feof(f)) break; PrintAndLog("File content error. Block data must include 32 HEX symbols"); - fclose(f); + if (f) { + fclose(f); + f = NULL; + } return 2; } for (i = 0; i < 32; i += 2) - sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]); + sscanf(&buf[i], "%02X", (unsigned int *)&buf8[i / 2]); memcpy(traceCard + blockNum * 16, buf8, 16); blockNum++; } - fclose(f); - + if (f) { + fclose(f); + f = NULL; + } return 0; } int saveTraceCard(void) { - FILE * f; if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0; + FILE * f; f = fopen(traceFileName, "w+"); if ( !f ) return 1; for (int i = 0; i < 64; i++) { // blocks for (int j = 0; j < 16; j++) // bytes - fprintf(f, "%02x", *(traceCard + i * 16 + j)); + fprintf(f, "%02X", *(traceCard + i * 16 + j)); fprintf(f,"\n"); } - fclose(f); + fflush(f); + if (f) { + fclose(f); + f = NULL; + } return 0; } -int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) { +int mfTraceInit(uint8_t *tuid, uint8_t uidlen, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) { if (traceCrypto1) crypto1_destroy(traceCrypto1); @@ -419,16 +471,14 @@ int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFil traceCrypto1 = NULL; if (wantSaveToEmlFile) - loadTraceCard(tuid); + loadTraceCard(tuid, uidlen); traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3]; traceCard[5] = sak; memcpy(&traceCard[6], atqa, 2); traceCurBlock = 0; - uid = bytes_to_num(tuid + 3, 4); - + cuid = bytes_to_num(tuid+(uidlen-4), 4); traceState = TRACE_IDLE; - return 0; } @@ -440,44 +490,48 @@ void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool i for (i = 0; i < len; i++) data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i]; } else { - bt = 0; - for (i = 0; i < 4; i++) - bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i; - + bt = 0; + bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 0)) << 0; + bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 1)) << 1; + bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 2)) << 2; + bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 3)) << 3; data[0] = bt; } return; } - int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { - uint8_t data[64]; if (traceState == TRACE_ERROR) return 1; + if (len > 64) { traceState = TRACE_ERROR; return 1; } + uint8_t data[64]; + memset(data, 0x00, sizeof(data)); + memcpy(data, data_src, len); + if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) { mf_crypto1_decrypt(traceCrypto1, data, len, 0); - PrintAndLog("dec> %s", sprint_hex(data, len)); - AddLogHex(logHexFileName, "dec> ", data, len); + PrintAndLog("DEC| %s", sprint_hex(data, len)); + AddLogHex(logHexFileName, "DEC| ", data, len); } switch (traceState) { case TRACE_IDLE: // check packet crc16! if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) { - PrintAndLog("dec> CRC ERROR!!!"); - AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!"); + PrintAndLog("DEC| CRC ERROR!!!"); + AddLogLine(logHexFileName, "DEC| ", "CRC ERROR!!!"); traceState = TRACE_ERROR; // do not decrypt the next commands return 1; } // AUTHENTICATION - if ((len == 4) && ((data[0] == 0x60) || (data[0] == 0x61))) { + if ((len == 4) && ((data[0] == MIFARE_AUTH_KEYA) || (data[0] == MIFARE_AUTH_KEYB))) { traceState = TRACE_AUTH1; traceCurBlock = data[1]; traceCurKey = data[0] == 60 ? 1:0; @@ -485,28 +539,25 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { } // READ - if ((len ==4) && ((data[0] == 0x30))) { + if ((len ==4) && ((data[0] == ISO14443A_CMD_READBLOCK))) { traceState = TRACE_READ_DATA; traceCurBlock = data[1]; return 0; } // WRITE - if ((len ==4) && ((data[0] == 0xA0))) { + if ((len ==4) && ((data[0] == ISO14443A_CMD_WRITEBLOCK))) { traceState = TRACE_WRITE_OK; traceCurBlock = data[1]; return 0; } // HALT - if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) { + if ((len ==4) && ((data[0] == ISO14443A_CMD_HALT) && (data[1] == 0x00))) { traceState = TRACE_ERROR; // do not decrypt the next commands return 0; } - return 0; - break; - case TRACE_READ_DATA: if (len == 18) { traceState = TRACE_IDLE; @@ -522,23 +573,19 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { traceState = TRACE_ERROR; return 1; } - break; - + break; case TRACE_WRITE_OK: if ((len == 1) && (data[0] == 0x0a)) { traceState = TRACE_WRITE_DATA; - return 0; } else { traceState = TRACE_ERROR; return 1; } - break; - + break; case TRACE_WRITE_DATA: if (len == 18) { traceState = TRACE_IDLE; - memcpy(traceCard + traceCurBlock * 16, data, 16); if (wantSaveToEmlFile) saveTraceCard(); return 0; @@ -546,8 +593,7 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { traceState = TRACE_ERROR; return 1; } - break; - + break; case TRACE_AUTH1: if (len == 4) { traceState = TRACE_AUTH2; @@ -557,12 +603,10 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { traceState = TRACE_ERROR; return 1; } - break; - + break; case TRACE_AUTH2: if (len == 8) { traceState = TRACE_AUTH_OK; - nr_enc = bytes_to_num(data, 4); ar_enc = bytes_to_num(data + 4, 4); return 0; @@ -570,12 +614,10 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { traceState = TRACE_ERROR; return 1; } - break; - + break; case TRACE_AUTH_OK: - if (len ==4) { + if (len == 4) { traceState = TRACE_IDLE; - at_enc = bytes_to_num(data, 4); // decode key here) @@ -585,48 +627,51 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { lfsr_rollback_word(revstate, 0, 0); lfsr_rollback_word(revstate, 0, 0); lfsr_rollback_word(revstate, nr_enc, 1); - lfsr_rollback_word(revstate, uid ^ nt, 0); - + lfsr_rollback_word(revstate, cuid ^ nt, 0); crypto1_get_lfsr(revstate, &key); - printf("Key: %012"llx"\n",key); - AddLogUint64(logHexFileName, "key: ", key); + PrintAndLog("Found Key: [%012"llx"]", key); + + //if ( tryMfk64(cuid, nt, nr_enc, ar_enc, at_enc, &key) ) + AddLogUint64(logHexFileName, "Found Key: ", key); int blockShift = ((traceCurBlock & 0xFC) + 3) * 16; if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4); - if (traceCurKey) { + if (traceCurKey) num_to_bytes(key, 6, traceCard + blockShift + 10); - } else { + else num_to_bytes(key, 6, traceCard + blockShift); - } - if (wantSaveToEmlFile) saveTraceCard(); + + if (wantSaveToEmlFile) + saveTraceCard(); - if (traceCrypto1) { + if (traceCrypto1) crypto1_destroy(traceCrypto1); - } // set cryptosystem state traceCrypto1 = lfsr_recovery64(ks2, ks3); -// nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt; - - /* traceCrypto1 = crypto1_create(key); // key in lfsr - crypto1_word(traceCrypto1, nt ^ uid, 0); - crypto1_word(traceCrypto1, ar, 1); - crypto1_word(traceCrypto1, 0, 0); - crypto1_word(traceCrypto1, 0, 0);*/ - return 0; } else { traceState = TRACE_ERROR; return 1; } - break; - + break; default: traceState = TRACE_ERROR; return 1; } + return 0; +} +int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){ + PrintAndLog("\nEncrypted data: [%s]", sprint_hex(data, len) ); + struct Crypto1State *s; + ks2 = ar_enc ^ prng_successor(nt, 64); + ks3 = at_enc ^ prng_successor(nt, 96); + s = lfsr_recovery64(ks2, ks3); + mf_crypto1_decrypt(s, data, len, FALSE); + PrintAndLog("Decrypted data: [%s]", sprint_hex(data, len) ); + crypto1_destroy(s); return 0; }