X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/4c6f2d48fbe8d57c6fbd80b7e4b38acaf6355e47..cbdcc89ae7404ac1c71a9e3824f8ee28ffb3724a:/client/mifarehost.c?ds=sidebyside diff --git a/client/mifarehost.c b/client/mifarehost.c index 72e70662..4e9ac539 100644 --- a/client/mifarehost.c +++ b/client/mifarehost.c @@ -14,6 +14,8 @@ #include #include "mifarehost.h" #include "proxmark3.h" +//#include "radixsort.h" +#include // MIFARE int compar_int(const void * a, const void * b) { @@ -21,21 +23,27 @@ 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 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 { @@ -60,79 +68,63 @@ 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; } - - - 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, len; + 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)) { - 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); - - 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); - } - } - else { - PrintAndLog("Got 0 keys from proxmark."); - return 1; - } - } + // error during nested + if (resp.arg[0]) return resp.arg[0]; - // calc keys + 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); + } + // 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) { @@ -154,6 +146,7 @@ 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; @@ -165,10 +158,11 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo // 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++; @@ -180,38 +174,58 @@ 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, 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; + return -4; } -int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){ +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, 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; @@ -221,48 +235,76 @@ 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}}; + clearCommandBuffer(); SendCommand(&c); - - UsbCommand resp; + UsbCommand resp; if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1; memcpy(data, resp.d.asBytes, blocksCount * 16); 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); + return mfEmlSetMem_xt(data, blockNum, blocksCount, 16); +} + +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 *oldUID, int wantWipe) { +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, 0, 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); - 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[6] = 0x04; - block0[7] = 0x00; + // 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)); - 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, int wantWipe, uint8_t params) { - uint8_t isOK = 0; +int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, 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, {params, blockNo, 0}}; memcpy(c.d.asBytes, data, 16); + clearCommandBuffer(); SendCommand(&c); - - UsbCommand resp; - if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) { + 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; + if (uid != NULL) + memcpy(uid, resp.d.asBytes, 4); + if (!isOK) + return 2; } else { PrintAndLog("Command execute timeout"); return 1; @@ -272,11 +314,10 @@ 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, blockNo, 0}}; + clearCommandBuffer(); SendCommand(&c); - - UsbCommand resp; + UsbCommand resp; if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) { isOK = resp.arg[0] & 0xff; memcpy(data, resp.d.asBytes, 16); @@ -294,28 +335,26 @@ int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) { static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00}; // variables -char logHexFileName[200] = {0x00}; +char logHexFileName[FILE_PATH_SIZE] = {0x00}; static uint8_t traceCard[4096] = {0x00}; -static char traceFileName[200] = {0}; +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; -uint64_t lfsr; -uint32_t ks2; -uint32_t ks3; +struct Crypto1State *revstate = NULL; -uint32_t uid; // serial number -uint32_t nt; // tag challenge -uint32_t nt_par; -uint32_t nr_enc; // encrypted reader challenge -uint32_t ar_enc; // encrypted reader response -uint32_t nr_ar_par; -uint32_t at_enc; // encrypted tag response -uint32_t at_par; +uint64_t key = 0; +uint32_t ks2 = 0; +uint32_t ks3 = 0; + +uint32_t uid = 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)); @@ -329,34 +368,41 @@ int isBlockEmpty(int blockN) { } int isBlockTrailer(int blockN) { - return ((blockN & 0x03) == 0x03); + return ((blockN & 0x03) == 0x03); } int loadTraceCard(uint8_t *tuid) { FILE * f; - char buf[64]; - uint8_t buf8[64]; + char buf[64] = {0x00}; + uint8_t buf8[64] = {0x00}; int i, blockNum; - if (!isTraceCardEmpty()) saveTraceCard(); + 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."); + 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) @@ -377,22 +423,27 @@ int saveTraceCard(void) { if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0; 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"); } fclose(f); - return 0; } int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) { - if (traceCrypto1) crypto1_destroy(traceCrypto1); + if (traceCrypto1) + crypto1_destroy(traceCrypto1); + traceCrypto1 = NULL; - if (wantSaveToEmlFile) loadTraceCard(tuid); + if (wantSaveToEmlFile) + loadTraceCard(tuid); + traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3]; traceCard[5] = sak; memcpy(&traceCard[6], atqa, 2); @@ -412,20 +463,22 @@ 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, uint32_t parity, bool wantSaveToEmlFile) { +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; @@ -449,7 +502,7 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm } // AUTHENTICATION - if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) { + if ((len == 4) && ((data[0] == 0x60) || (data[0] == 0x61))) { traceState = TRACE_AUTH1; traceCurBlock = data[1]; traceCurKey = data[0] == 60 ? 1:0; @@ -523,9 +576,7 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm case TRACE_AUTH1: if (len == 4) { traceState = TRACE_AUTH2; - nt = bytes_to_num(data, 4); - nt_par = parity; return 0; } else { traceState = TRACE_ERROR; @@ -539,7 +590,6 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm nr_enc = bytes_to_num(data, 4); ar_enc = bytes_to_num(data + 4, 4); - nr_ar_par = parity; return 0; } else { traceState = TRACE_ERROR; @@ -552,7 +602,6 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm traceState = TRACE_IDLE; at_enc = bytes_to_num(data, 4); - at_par = parity; // decode key here) ks2 = ar_enc ^ prng_successor(nt, 64); @@ -562,17 +611,18 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm 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); + + crypto1_get_lfsr(revstate, &key); + printf("Key: %012"llx"\n",key); + AddLogUint64(logHexFileName, "key: ", key); 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 + blockShift + 10); + num_to_bytes(key, 6, traceCard + blockShift + 10); } else { - num_to_bytes(lfsr, 6, traceCard + blockShift); + num_to_bytes(key, 6, traceCard + blockShift); } if (wantSaveToEmlFile) saveTraceCard(); @@ -585,7 +635,7 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm // nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt; - /* traceCrypto1 = crypto1_create(lfsr); // key in lfsr + /* traceCrypto1 = crypto1_create(key); // key in lfsr crypto1_word(traceCrypto1, nt ^ uid, 0); crypto1_word(traceCrypto1, ar, 1); crypto1_word(traceCrypto1, 0, 0); @@ -605,3 +655,28 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm return 0; } + +int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){ + /* + uint32_t nt; // tag challenge + uint32_t nr_enc; // encrypted reader challenge + uint32_t ar_enc; // encrypted reader response + uint32_t at_enc; // encrypted tag response + */ + struct Crypto1State *pcs = NULL; + + ks2 = ar_enc ^ prng_successor(nt, 64); + ks3 = at_enc ^ prng_successor(nt, 96); + + PrintAndLog("Decrypting data with:"); + PrintAndLog(" nt: %08x",nt); + PrintAndLog(" ar_enc: %08x",ar_enc); + PrintAndLog(" at_enc: %08x",at_enc); + PrintAndLog("\nEncrypted data: [%s]", sprint_hex(data,len) ); + + pcs = lfsr_recovery64(ks2, ks3); + mf_crypto1_decrypt(pcs, data, len, FALSE); + PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) ); + crypto1_destroy(pcs); + return 0; +}