X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/55acbb2a3903f7940d0db5fae2e8f4fdab51d1b8..c07b79fcbf72f530cbff5bc1e49c12bff311f50f:/client/mifarehost.c diff --git a/client/mifarehost.c b/client/mifarehost.c index cfcc17ba..d025918d 100644 --- a/client/mifarehost.c +++ b/client/mifarehost.c @@ -11,190 +11,202 @@ #include #include #include +#include #include "mifarehost.h" +#include "proxmark3.h" // MIFARE - int compar_int(const void * a, const void * b) { - return (*(uint64_t*)b - *(uint64_t*)a); + // 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; } -// 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 0; + else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1; + else return -1; } -countKeys * uniqsort(uint64_t * possibleKeys, uint32_t size) { - int i, j = 0; - int count = 0; - countKeys *our_counts; - - qsort(possibleKeys, size, sizeof (uint64_t), compar_int); - - our_counts = calloc(size, sizeof(countKeys)); - if (our_counts == NULL) { - PrintAndLog("Memory allocation error for our_counts"); - return NULL; - } +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); + 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); - 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; - } - } - qsort(our_counts, j, sizeof(countKeys), compar_special_int); - return (our_counts); + return statelist->head.slhead; } -int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKeys) +int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate) { - int i, m, len; - uint8_t isEOF; + uint16_t i, len; uint32_t uid; - fnVector * vector = NULL; - countKeys *ck; - int lenVector = 0; - UsbCommand * resp = NULL; - - memset(resultKeys, 0x00, 16 * 6); + UsbCommand resp; + StateList_t statelists[2]; + struct Crypto1State *p1, *p2, *p3, *p4; + // flush queue - while (WaitForResponseTimeout(CMD_ACK, 500) != NULL) ; + WaitForResponseTimeout(CMD_ACK,NULL,100); - UsbCommand c = {CMD_MIFARE_NESTED, {blockNo, keyType, trgBlockNo + trgKeyType * 0x100}}; + UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}}; memcpy(c.d.asBytes, key, 6); - SendCommand(&c); - - PrintAndLog("\n"); - - // wait cycle - while (true) { - printf("."); - if (ukbhit()) { - getchar(); - printf("\naborted via keyboard!\n"); - break; - } - - resp = WaitForResponseTimeout(CMD_ACK, 1500); - - if (resp != NULL) { - isEOF = resp->arg[0] & 0xff; + SendCommand(&c); - if (isEOF) break; - - len = resp->arg[1] & 0xff; - if (len == 0) continue; + if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) { + len = resp.arg[1]; + if (len == 2) { + memcpy(&uid, resp.d.asBytes, 4); + PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8); - 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; + 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(&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); + 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); } - - lenVector += len; + } + else { + PrintAndLog("Got 0 keys from proxmark."); + return 1; } } - if (!lenVector) { - PrintAndLog("Got 0 keys from proxmark."); - 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; + 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]); + } - while ((revstate->odd != 0x0) || (revstate->even != 0x0)) { - lfsr_rollback_word(revstate, vector[m].nt ^ vector[m].uid, 0); - crypto1_get_lfsr(revstate, &lfsr); + // wait for threads to terminate: + for (i = 0; i < 2; i++) { + pthread_join(thread_id[i], (void*)&statelists[i].head.slhead); + } + - // 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; - } + // 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++; } - pk->possibleKeys[kcount] = lfsr; - kcount++; - revstate++; } - free(revstate_start); - revstate_start = NULL; - + else { + while (Compare16Bits(p1, p2) == -1) p1++; + while (Compare16Bits(p1, p2) == 1) p2++; + } } - - // 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; - } + 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; + 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++; + } } - - PrintAndLog("Total keys count:%d", kcount); - ck = uniqsort(pk->possibleKeys, pk->size); - - // fill key array - for (i = 0; i < 16 ; i++) { - num_to_bytes(ck[i].key, 6, (uint8_t*)(resultKeys + i * 6)); + statelists[0].len = p7 - statelists[0].head.keyhead; + statelists[0].tail.keytail=--p7; + + memset(resultKey, 0, 6); + // 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; + 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, 1, keyBlock, &key64)) { + num_to_bytes(key64, 6, resultKey); + break; + } } - - // finalize - free(pk->possibleKeys); - free(pk); - free(ck); - free(vector); - + + free(statelists[0].head.slhead); + free(statelists[1].head.slhead); + return 0; } int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){ + *key = 0; - UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}}; + UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}}; memcpy(c.d.asBytes, keyBlock, 6 * keycnt); + SendCommand(&c); - SendCommand(&c); - - UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 3000); - - if (resp == NULL) return 1; - if ((resp->arg[0] & 0xff) != 0x01) return 2; - *key = bytes_to_num(resp->d.asBytes, 6); + UsbCommand resp; + if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1; + if ((resp.arg[0] & 0xff) != 0x01) return 2; + *key = bytes_to_num(resp.d.asBytes, 6); return 0; } @@ -202,13 +214,11 @@ int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * key int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) { UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}}; - - SendCommand(&c); + SendCommand(&c); - UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500); - - if (resp == NULL) return 1; - memcpy(data, resp->d.asBytes, blocksCount * 16); + UsbCommand resp; + if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1; + memcpy(data, resp.d.asBytes, blocksCount * 16); return 0; } @@ -221,31 +231,29 @@ int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) { // "MAGIC" CARD -int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) { - uint8_t block0[16]; - memset(block0, 0, 16); +int mfCSetUID(uint8_t *uid, uint8_t *oldUID, bool wantWipe) { + uint8_t block0[16] = {0x00}; memcpy(block0, uid, 4); block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // Mifare UID BCC // mifare classic SAK(byte 5) and ATQA(byte 6 and 7) - block0[5] = 0x88; + block0[5] = 0x08; block0[6] = 0x04; block0[7] = 0x00; return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER); } -int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, int wantWipe, uint8_t params) { - uint8_t isOK = 0; +int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) { - UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}}; + uint8_t isOK = 0; + UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}}; memcpy(c.d.asBytes, data, 16); SendCommand(&c); - UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500); - - if (resp != NULL) { - isOK = resp->arg[0] & 0xff; - if (uid != NULL) memcpy(uid, resp->d.asBytes, 4); + 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"); @@ -257,14 +265,13 @@ int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, int wantWipe, uint int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) { uint8_t isOK = 0; - UsbCommand c = {CMD_MIFARE_EML_CGETBLOCK, {params, 0, blockNo}}; + UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}}; SendCommand(&c); - UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500); - - if (resp != NULL) { - isOK = resp->arg[0] & 0xff; - memcpy(data, resp->d.asBytes, 16); + 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"); @@ -275,9 +282,13 @@ int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) { // SNIFFER +// constants +static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00}; + // variables char logHexFileName[200] = {0x00}; -static uint8_t traceCard[4096]; +static uint8_t traceCard[4096] = {0x00}; +static char traceFileName[200] = {0x00}; static int traceState = TRACE_IDLE; static uint8_t traceCurBlock = 0; static uint8_t traceCurKey = 0; @@ -295,13 +306,84 @@ uint32_t nr_enc; // encrypted reader challenge uint32_t ar_enc; // encrypted reader response uint32_t at_enc; // encrypted tag response -int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak) { +int isTraceCardEmpty(void) { + return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0)); +} - if (traceCrypto1) crypto1_destroy(traceCrypto1); - traceCrypto1 = NULL; +int isBlockEmpty(int blockN) { + for (int i = 0; i < 16; i++) + if (traceCard[blockN * 16 + i] != 0) return 0; + return 1; +} + +int isBlockTrailer(int blockN) { + return ((blockN & 0x03) == 0x03); +} + +int loadTraceCard(uint8_t *tuid) { + FILE * f; + char buf[64]; + uint8_t buf8[64]; + int i, blockNum; + + if (!isTraceCardEmpty()) saveTraceCard(); memset(traceCard, 0x00, 4096); memcpy(traceCard, tuid + 3, 4); + FillFileNameByUID(traceFileName, tuid, ".eml", 7); + + 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("File reading error."); + fclose(f); + return 2; + } + + 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]); + + memcpy(traceCard + blockNum * 16, buf8, 16); + + blockNum++; + } + fclose(f); + + return 0; +} + +int saveTraceCard(void) { + FILE * f; + + if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0; + + f = fopen(traceFileName, "w+"); + 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"); + } + fclose(f); + + return 0; +} + +int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) { + + if (traceCrypto1) crypto1_destroy(traceCrypto1); + traceCrypto1 = NULL; + + if (wantSaveToEmlFile) loadTraceCard(tuid); traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3]; traceCard[5] = sak; memcpy(&traceCard[6], atqa, 2); @@ -331,7 +413,7 @@ void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool i } -int mfTraceDecode(uint8_t *data_src, int len) { +int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { uint8_t data[64]; if (traceState == TRACE_ERROR) return 1; @@ -349,7 +431,13 @@ int mfTraceDecode(uint8_t *data_src, int len) { switch (traceState) { case TRACE_IDLE: - // TODO: check packet crc16! + // 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] == 0x60) || (data[0] == 0x61))) { @@ -386,7 +474,12 @@ int mfTraceDecode(uint8_t *data_src, int len) { if (len == 18) { traceState = TRACE_IDLE; - memcpy(traceCard + traceCurBlock * 16, data, 16); + 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; @@ -395,7 +488,7 @@ int mfTraceDecode(uint8_t *data_src, int len) { break; case TRACE_WRITE_OK: - if ((len == 1) && (data[0] = 0x0a)) { + if ((len == 1) && (data[0] == 0x0a)) { traceState = TRACE_WRITE_DATA; return 0; @@ -410,6 +503,7 @@ int mfTraceDecode(uint8_t *data_src, int len) { traceState = TRACE_IDLE; memcpy(traceCard + traceCurBlock * 16, data, 16); + if (wantSaveToEmlFile) saveTraceCard(); return 0; } else { traceState = TRACE_ERROR; @@ -420,7 +514,6 @@ int mfTraceDecode(uint8_t *data_src, int len) { case TRACE_AUTH1: if (len == 4) { traceState = TRACE_AUTH2; - nt = bytes_to_num(data, 4); return 0; } else { @@ -449,32 +542,27 @@ int mfTraceDecode(uint8_t *data_src, int len) { at_enc = bytes_to_num(data, 4); // decode key here) - if (!traceCrypto1) { - 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, uid ^ nt, 0); - }else{ - 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, uid ^ nt, 0); - } + 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, uid ^ nt, 0); + crypto1_get_lfsr(revstate, &lfsr); printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF)); AddLogUint64(logHexFileName, "key> ", lfsr); + int blockShift = ((traceCurBlock & 0xFC) + 3) * 16; + if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4); + if (traceCurKey) { - num_to_bytes(lfsr, 6, traceCard + traceCurBlock * 16 + 10); + num_to_bytes(lfsr, 6, traceCard + blockShift + 10); } else { - num_to_bytes(lfsr, 6, traceCard + traceCurBlock * 16); + num_to_bytes(lfsr, 6, traceCard + blockShift); } + if (wantSaveToEmlFile) saveTraceCard(); if (traceCrypto1) { crypto1_destroy(traceCrypto1);