X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0675f200e6d52728457664e5e127af2496af9bdd..ce1cccd697034c4eb18223ad9895f84ac1161354:/client/mifarehost.c diff --git a/client/mifarehost.c b/client/mifarehost.c index 529c248d..b41c3687 100644 --- a/client/mifarehost.c +++ b/client/mifarehost.c @@ -1,242 +1,665 @@ -// Merlok, 2011 +// Merlok, 2011, 2012 // people from mifare@nethemba.com, 2010 // // This code is licensed to you under the terms of the GNU GPL, version 2 or, // at your option, any later version. See the LICENSE.txt file for the text of // the license. //----------------------------------------------------------------------------- -// High frequency ISO14443A commands +// mifare commands //----------------------------------------------------------------------------- -#include -#include -#include #include "mifarehost.h" +// MIFARE +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); -int compar_int(const void * a, const void * b) { - return (*(uint64_t*)b - *(uint64_t*)a); + // better: + 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 countKeys structure -int compar_special_int(const void * a, const void * b) { - return (((countKeys *)b)->count - ((countKeys *)a)->count); +// Compare 16 Bits out of cryptostate +int Compare16Bits(const void * a, const void * b) { + 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)) + ; +*/ +} + +// 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); + + 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; } -countKeys * uniqsort(uint64_t * possibleKeys, uint32_t size) { - int i, j = 0; - int count = 0; - countKeys *our_counts; +int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate) +{ + uint16_t i; + uint32_t uid; + UsbCommand resp; + StateList_t statelists[2]; + struct Crypto1State *p1, *p2, *p3, *p4; - qsort(possibleKeys, size, sizeof (uint64_t), compar_int); + 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; + + // error during nested + if (resp.arg[0]) return resp.arg[0]; - our_counts = calloc(size, sizeof(countKeys)); - if (our_counts == NULL) { - PrintAndLog("Memory allocation error for our_counts"); - return NULL; + memcpy(&uid, resp.d.asBytes, 4); + + for (i = 0; i < 2; i++) { + statelists[i].blockNo = resp.arg[2] & 0xff; + statelists[i].keyType = (resp.arg[2] >> 8) & 0xff; + statelists[i].uid = uid; + memcpy(&statelists[i].nt, (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4); + memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4); } - for (i = 0; i < size; i++) { - if (possibleKeys[i+1] == possibleKeys[i]) { - count++; - } else { - our_counts[j].key = possibleKeys[i]; - our_counts[j].count = count; - j++; - count=0; + // calc keys + pthread_t thread_id[2]; + + // create and run worker threads + 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++) + 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) { + *p3 = *p1; + lfsr_rollback_word(p3, statelists[0].nt ^ statelists[0].uid, 0); + p3++; + p1++; + } + savestate = *p2; + while(Compare16Bits(p2, savep) == 0 && p2 <= statelists[1].tail.sltail) { + *p4 = *p2; + lfsr_rollback_word(p4, statelists[1].nt ^ statelists[1].uid, 0); + p4++; + p2++; + } + } + else { + while (Compare16Bits(p1, p2) == -1) p1++; + while (Compare16Bits(p1, p2) == 1) p2++; } } - qsort(our_counts, j, sizeof(countKeys), compar_special_int); - return (our_counts); -} -int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKeys) -{ - int i, m, len; - uint8_t isEOF; - uint32_t uid; - fnVector * vector = NULL; - countKeys *ck; - int lenVector = 0; - UsbCommand * resp = NULL; + 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; + + // 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; - memset(resultKeys, 0x00, 16 * 6); + while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) { + if (compar_int(p5, p6) == 0) { + *p7++ = *p5++; + p6++; + } + else { + while (compar_int(p5, p6) == -1) p5++; + while (compar_int(p5, p6) == 1) p6++; + } + } + statelists[0].len = p7 - statelists[0].head.keyhead; + statelists[0].tail.keytail = --p7; - // flush queue - while (WaitForResponseTimeout(CMD_ACK, 500) != NULL) ; + uint32_t numOfCandidates = statelists[0].len; + if ( numOfCandidates == 0 ) goto out; - UsbCommand c = {CMD_MIFARE_NESTED, {blockNo, keyType, trgBlockNo + trgKeyType * 0x100}}; - memcpy(c.d.asBytes, key, 6); - SendCommand(&c); + memset(resultKey, 0, 6); + uint64_t key64 = 0; + + // The list may still contain several key candidates. Test each of them with mfCheckKeys + // uint32_t max_keys = keycnt > (USB_CMD_DATA_SIZE/6) ? (USB_CMD_DATA_SIZE/6) : keycnt; + uint8_t keyBlock[USB_CMD_DATA_SIZE] = {0x00}; - PrintAndLog("\n"); + for (i = 0; i < numOfCandidates; ++i){ + crypto1_get_lfsr(statelists[0].head.slhead + i, &key64); + 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 -4; +} - // wait cycle - while (true) { - printf("."); - if (ukbhit()) { - getchar(); - printf("\naborted via keyboard!\n"); +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 | (keyType<<8)), clear_trace, keycnt}}; + memcpy(c.d.asBytes, keyBlock, 6 * keycnt); + clearCommandBuffer(); + SendCommand(&c); + UsbCommand resp; + 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; +} - resp = WaitForResponseTimeout(CMD_ACK, 1500); - if (resp != NULL) { - isEOF = resp->arg[0] & 0xff; +// EMULATOR - if (isEOF) break; - - len = resp->arg[1] & 0xff; - if (len == 0) continue; - - memcpy(&uid, resp->d.asBytes, 4); - PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, resp->arg[2] & 0xff, (resp->arg[2] >> 8) & 0xff); - vector = (fnVector *) realloc((void *)vector, (lenVector + len) * sizeof(fnVector) + 200); - if (vector == NULL) { - PrintAndLog("Memory allocation error for fnVector. len: %d bytes: %d", lenVector + len, (lenVector + len) * sizeof(fnVector)); - break; - } - - for (i = 0; i < len; i++) { - vector[lenVector + i].blockNo = resp->arg[2] & 0xff; - vector[lenVector + i].keyType = (resp->arg[2] >> 8) & 0xff; - vector[lenVector + i].uid = uid; +int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) { + UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}}; + clearCommandBuffer(); + SendCommand(&c); + UsbCommand resp; + if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1; + memcpy(data, resp.d.asBytes, blocksCount * 16); + return 0; +} - memcpy(&vector[lenVector + i].nt, (void *)(resp->d.asBytes + 8 + i * 8 + 0), 4); - memcpy(&vector[lenVector + i].ks1, (void *)(resp->d.asBytes + 8 + i * 8 + 4), 4); - } +int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) { + return mfEmlSetMem_xt(data, blockNum, blocksCount, 16); +} - lenVector += len; - } +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) { + + uint8_t params = MAGIC_SINGLE; + uint8_t block0[16]; + memset(block0, 0x00, sizeof(block0)); + + 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 + memcpy(block0, uid, 4); + // 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 ) + block0[5]=sak[0]; + + if ( atqa != NULL ) { + block0[6]=atqa[1]; + block0[7]=atqa[0]; } + PrintAndLog("new block 0: %s", sprint_hex(block0,16)); - if (!lenVector) { - PrintAndLog("Got 0 keys from proxmark."); + 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, uint8_t params) { + + uint8_t isOK = 0; + 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)) { + isOK = resp.arg[0] & 0xff; + if (uid != NULL) + memcpy(uid, resp.d.asBytes, 4); + if (!isOK) + return 2; + } else { + PrintAndLog("Command execute timeout"); return 1; } - printf("------------------------------------------------------------------\n"); - - // calc keys - struct Crypto1State* revstate = NULL; - struct Crypto1State* revstate_start = NULL; - uint64_t lfsr; - int kcount = 0; - pKeys *pk; - - if ((pk = (void *) malloc(sizeof(pKeys))) == NULL) return 1; - memset(pk, 0x00, sizeof(pKeys)); - - for (m = 0; m < lenVector; m++) { - // And finally recover the first 32 bits of the key - revstate = lfsr_recovery32(vector[m].ks1, vector[m].nt ^ vector[m].uid); - if (revstate_start == NULL) revstate_start = revstate; - - while ((revstate->odd != 0x0) || (revstate->even != 0x0)) { - lfsr_rollback_word(revstate, vector[m].nt ^ vector[m].uid, 0); - crypto1_get_lfsr(revstate, &lfsr); - - // Allocate a new space for keys - if (((kcount % MEM_CHUNK) == 0) || (kcount >= pk->size)) { - pk->size += MEM_CHUNK; -//fprintf(stdout, "New chunk by %d, sizeof %d\n", kcount, pk->size * sizeof(uint64_t)); - pk->possibleKeys = (uint64_t *) realloc((void *)pk->possibleKeys, pk->size * sizeof(uint64_t)); - if (pk->possibleKeys == NULL) { - PrintAndLog("Memory allocation error for pk->possibleKeys"); - return 1; - } - } - pk->possibleKeys[kcount] = lfsr; - kcount++; - revstate++; - } - free(revstate_start); - revstate_start = NULL; + return 0; +} +int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) { + uint8_t isOK = 0; + UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, blockNo, 0}}; + clearCommandBuffer(); + SendCommand(&c); + UsbCommand resp; + if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) { + isOK = resp.arg[0] & 0xff; + memcpy(data, resp.d.asBytes, 16); + if (!isOK) return 2; + } else { + PrintAndLog("Command execute timeout"); + return 1; } - - // Truncate - if (kcount != 0) { - pk->size = --kcount; - if ((pk->possibleKeys = (uint64_t *) realloc((void *)pk->possibleKeys, pk->size * sizeof(uint64_t))) == NULL) { - PrintAndLog("Memory allocation error for pk->possibleKeys"); - return 1; - } - } + return 0; +} - PrintAndLog("Total keys count:%d", kcount); - ck = uniqsort(pk->possibleKeys, pk->size); +// SNIFFER +// [iceman] so many global variables.... + +// constants +static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00}; + +// variables +char logHexFileName[FILE_PATH_SIZE] = {0x00}; +static uint8_t traceCard[4096] = {0x00}; +static char traceFileName[FILE_PATH_SIZE] = {0x00}; +static int traceState = TRACE_IDLE; +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 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 +uint32_t at_enc =0; // encrypted tag response + +int isTraceCardEmpty(void) { + return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0)); +} - // fill key array - for (i = 0; i < 16 ; i++) { - num_to_bytes(ck[i].key, 6, (uint8_t*)(resultKeys + i * 6)); - } +int isBlockEmpty(int blockN) { + for (int i = 0; i < 16; i++) + if (traceCard[blockN * 16 + i] != 0) return 0; - // finalize - free(pk->possibleKeys); - free(pk); - free(ck); - free(vector); + return 1; +} - return 0; +int isBlockTrailer(int blockN) { + return ((blockN & 0x03) == 0x03); } -int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){ - *key = 0; +int loadTraceCard(uint8_t *tuid, uint8_t uidlen) { + FILE * f; + char buf[64] = {0x00}; + uint8_t buf8[64] = {0x00}; + int i, blockNum; + + if (!isTraceCardEmpty()) + saveTraceCard(); + + memset(traceCard, 0x00, 4096); + memcpy(traceCard, tuid, uidlen); - UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}}; - memcpy(c.d.asBytes, keyBlock, 6 * keycnt); + FillFileNameByUID(traceFileName, tuid, ".eml", uidlen); + + f = fopen(traceFileName, "r"); + if (!f) return 1; + + blockNum = 0; + + while(!feof(f)){ + + memset(buf, 0, sizeof(buf)); + if (fgets(buf, sizeof(buf), f) == NULL) { + PrintAndLog("No trace file found or reading error."); + fclose(f); + return 2; + } - SendCommand(&c); + if (strlen(buf) < 32){ + if (feof(f)) break; + PrintAndLog("File content error. Block data must include 32 HEX symbols"); + fclose(f); + return 2; + } + for (i = 0; i < 32; i += 2) + sscanf(&buf[i], "%02X", (unsigned int *)&buf8[i / 2]); - UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 3000); + memcpy(traceCard + blockNum * 16, buf8, 16); - if (resp == NULL) return 1; - if ((resp->arg[0] & 0xff) != 0x01) return 2; - *key = bytes_to_num(resp->d.asBytes, 6); + blockNum++; + } + fclose(f); return 0; } -int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) { - UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}}; - - SendCommand(&c); +int saveTraceCard(void) { + + 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,"\n"); + } + fflush(f); + fclose(f); + return 0; +} - UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500); +int mfTraceInit(uint8_t *tuid, uint8_t uidlen, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) { - if (resp == NULL) return 1; - memcpy(data, resp->d.asBytes, blocksCount * 16); + if (traceCrypto1) + crypto1_destroy(traceCrypto1); + + traceCrypto1 = NULL; + + if (wantSaveToEmlFile) + loadTraceCard(tuid, uidlen); + + traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3]; + traceCard[5] = sak; + memcpy(&traceCard[6], atqa, 2); + traceCurBlock = 0; + cuid = bytes_to_num(tuid+(uidlen-4), 4); + traceState = TRACE_IDLE; return 0; } -int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) { - UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}}; - memcpy(c.d.asBytes, data, blocksCount * 16); - SendCommand(&c); - return 0; +void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){ + uint8_t bt = 0; + int i; + + if (len != 1) { + for (i = 0; i < len; i++) + data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i]; + } else { + 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 mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) { - uint8_t isOK = 0; - uint8_t block0[16]; - memset(block0, 0, 16); - memcpy(block0, uid, 4); - block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // Mifare UID BCC +int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { + + 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); + } + + 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!!!"); + traceState = TRACE_ERROR; // do not decrypt the next commands + return 1; + } + + // AUTHENTICATION + 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; + return 0; + } - UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, 1, 0}}; - memcpy(c.d.asBytes, block0, 16); - SendCommand(&c); + // READ + if ((len ==4) && ((data[0] == ISO14443A_CMD_READBLOCK))) { + traceState = TRACE_READ_DATA; + traceCurBlock = data[1]; + return 0; + } - UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500); + // WRITE + if ((len ==4) && ((data[0] == ISO14443A_CMD_WRITEBLOCK))) { + traceState = TRACE_WRITE_OK; + traceCurBlock = data[1]; + return 0; + } - if (resp != NULL) { - isOK = resp->arg[0] & 0xff; - PrintAndLog("isOk:%02x", isOK); - memcpy(oldUID, resp->d.asBytes, 4); - if (!isOK) return 2; - } else { - PrintAndLog("Command execute timeout"); + // HALT + if ((len ==4) && ((data[0] == ISO14443A_CMD_HALT) && (data[1] == 0x00))) { + traceState = TRACE_ERROR; // do not decrypt the next commands + return 0; + } + return 0; + case TRACE_READ_DATA: + if (len == 18) { + traceState = TRACE_IDLE; + + if (isBlockTrailer(traceCurBlock)) { + memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4); + } else { + memcpy(traceCard + traceCurBlock * 16, data, 16); + } + if (wantSaveToEmlFile) saveTraceCard(); + return 0; + } else { + traceState = TRACE_ERROR; + return 1; + } + break; + case TRACE_WRITE_OK: + if ((len == 1) && (data[0] == 0x0a)) { + traceState = TRACE_WRITE_DATA; + return 0; + } else { + traceState = TRACE_ERROR; + return 1; + } + break; + case TRACE_WRITE_DATA: + if (len == 18) { + traceState = TRACE_IDLE; + memcpy(traceCard + traceCurBlock * 16, data, 16); + if (wantSaveToEmlFile) saveTraceCard(); + return 0; + } else { + traceState = TRACE_ERROR; + return 1; + } + break; + case TRACE_AUTH1: + if (len == 4) { + traceState = TRACE_AUTH2; + nt = bytes_to_num(data, 4); + return 0; + } else { + traceState = TRACE_ERROR; + return 1; + } + 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; + } else { + traceState = TRACE_ERROR; + return 1; + } + break; + case TRACE_AUTH_OK: + if (len == 4) { + traceState = TRACE_IDLE; + at_enc = bytes_to_num(data, 4); + + // decode key here) + ks2 = ar_enc ^ prng_successor(nt, 64); + ks3 = at_enc ^ prng_successor(nt, 96); + revstate = lfsr_recovery64(ks2, ks3); + lfsr_rollback_word(revstate, 0, 0); + lfsr_rollback_word(revstate, 0, 0); + lfsr_rollback_word(revstate, nr_enc, 1); + lfsr_rollback_word(revstate, cuid ^ nt, 0); + crypto1_get_lfsr(revstate, &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) + num_to_bytes(key, 6, traceCard + blockShift + 10); + else + num_to_bytes(key, 6, traceCard + blockShift); + + if (wantSaveToEmlFile) + saveTraceCard(); + + if (traceCrypto1) + crypto1_destroy(traceCrypto1); + + // set cryptosystem state + traceCrypto1 = lfsr_recovery64(ks2, ks3); + + return 0; + } else { + traceState = TRACE_ERROR; + return 1; + } + 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; +}