+               if (WaitForResponseTimeout(CMD_ACK,&resp, 4500)) {
+                       uint8_t readStatus = resp.arg[0] & 0xff;
+                       uint8_t *data = resp.d.asBytes;
+
+                       if (verbose) PrintAndLog("Readstatus:%02x", readStatus);
+                       if( readStatus == 0){
+                               //Aborted
+                               if (verbose) PrintAndLog("Quitting...");
+                               return 0;
+                       }
+                       if( readStatus & FLAG_ICLASS_READER_CSN){
+                               PrintAndLog("CSN: %s",sprint_hex(data,8));
+                               tagFound = true;
+                       }
+                       if( readStatus & FLAG_ICLASS_READER_CC)   PrintAndLog("CC: %s", sprint_hex(data+16, 8));
+                       if( readStatus & FLAG_ICLASS_READER_CONF) printIclassDumpInfo(data);                    
+                       if (tagFound && !loop) return 1;
+               } else {
+                       if (verbose) PrintAndLog("Command execute timeout");
+               }
+               if (!loop) break;
+       }
+       return 0;
+}
+
+int CmdHFiClassReader(const char *Cmd) {       
+       char cmdp = param_getchar(Cmd, 0);
+       if (cmdp == 'h' || cmdp == 'H') return usage_hf_iclass_reader();
+       bool findone = (cmdp == '1') ? FALSE : TRUE;
+       return HFiClassReader(Cmd, findone, true);
+}
+
+int CmdHFiClassReader_Replay(const char *Cmd) {
+       uint8_t readerType = 0;
+       uint8_t MAC[4]={0x00, 0x00, 0x00, 0x00};
+
+       if (strlen(Cmd)<1) return usage_hf_iclass_replay();
+
+       if (param_gethex(Cmd, 0, MAC, 8)) {
+               PrintAndLog("MAC must include 8 HEX symbols");
+               return 1;
+       }
+
+       UsbCommand c = {CMD_READER_ICLASS_REPLAY, {readerType}};
+       memcpy(c.d.asBytes, MAC, 4);
+       clearCommandBuffer();
+       SendCommand(&c);
+       return 0;
+}
+
+int iclassEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {
+       UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};
+       memcpy(c.d.asBytes, data, blocksCount * 16);
+       clearCommandBuffer();
+       SendCommand(&c);
+       return 0;
+}
+
+int CmdHFiClassELoad(const char *Cmd) {
+
+       char opt = param_getchar(Cmd, 0);
+       if (strlen(Cmd)<1 || opt == 'h' || opt == 'H') return usage_hf_iclass_eload();
+
+       //File handling and reading
+       FILE *f;
+       char filename[FILE_PATH_SIZE];
+       if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0) {
+               f = fopen(filename, "rb");
+       } else {
+               return usage_hf_iclass_eload();
+       }
+
+       if(!f) {
+               PrintAndLog("Failed to read from file '%s'", filename);
+               return 1;
+       }
+
+       fseek(f, 0, SEEK_END);
+       long fsize = ftell(f);
+       fseek(f, 0, SEEK_SET);
+
+       if (fsize < 0)  {
+               prnlog("Error, when getting filesize");
+               fclose(f);
+               return 1;
+       }
+
+       uint8_t *dump = malloc(fsize);
+
+       size_t bytes_read = fread(dump, 1, fsize, f);
+       fclose(f);
+
+       printIclassDumpInfo(dump);
+       //Validate
+
+       if (bytes_read < fsize) {
+               prnlog("Error, could only read %d bytes (should be %d)",bytes_read, fsize );
+               free(dump);
+               return 1;
+       }
+       //Send to device
+       uint32_t bytes_sent = 0;
+       uint32_t bytes_remaining  = bytes_read;
+
+       while(bytes_remaining > 0){
+               uint32_t bytes_in_packet = MIN(USB_CMD_DATA_SIZE, bytes_remaining);
+               UsbCommand c = {CMD_ICLASS_EML_MEMSET, {bytes_sent,bytes_in_packet,0}};
+               memcpy(c.d.asBytes, dump, bytes_in_packet);
+               clearCommandBuffer();
+               SendCommand(&c);
+               bytes_remaining -= bytes_in_packet;
+               bytes_sent += bytes_in_packet;
+       }
+       free(dump);
+       PrintAndLog("Sent %d bytes of data to device emulator memory", bytes_sent);
+       return 0;
+}
+
+static int readKeyfile(const char *filename, size_t len, uint8_t* buffer) {
+       FILE *f = fopen(filename, "rb");
+       if(!f) {
+               PrintAndLog("Failed to read from file '%s'", filename);
+               return 1;
+       }
+       fseek(f, 0, SEEK_END);
+       long fsize = ftell(f);
+       fseek(f, 0, SEEK_SET);
+       size_t bytes_read = fread(buffer, 1, len, f);
+       fclose(f);
+       
+       if(fsize != len) {
+               PrintAndLog("Warning, file size is %d, expected %d", fsize, len);
+               return 1;
+       }
+       
+       if(bytes_read != len) {
+               PrintAndLog("Warning, could only read %d bytes, expected %d" ,bytes_read, len);
+               return 1;
+       }
+       return 0;
+}
+
+int CmdHFiClassDecrypt(const char *Cmd) {
+
+       char opt = param_getchar(Cmd, 0);
+       if (strlen(Cmd)<1 || opt == 'h' || opt == 'H') return usage_hf_iclass_decrypt();
+       
+       uint8_t key[16] = { 0 };
+       if(readKeyfile("iclass_decryptionkey.bin", 16, key)) return usage_hf_iclass_decrypt();
+       
+       PrintAndLog("Decryption key loaded from file [ok]");
+
+       //Open the tagdump-file
+       FILE *f;
+       char filename[FILE_PATH_SIZE];
+       if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0) {
+               f = fopen(filename, "rb");
+               if (!f) {
+                       PrintAndLog("Could not find file %s", filename);
+                       return 1;
+               }               
+       } else {
+               return usage_hf_iclass_decrypt();
+       }       
+
+       fseek(f, 0, SEEK_END);
+       long fsize = ftell(f);
+       fseek(f, 0, SEEK_SET);
+               
+       if ( fsize < 0 ) {
+               PrintAndLog("Error, when getting filesize");
+               fclose(f);
+               return 2;
+       }
+       
+       uint8_t *decrypted = malloc(fsize);
+       
+       size_t bytes_read = fread(decrypted, 1, fsize, f);
+       fclose(f);
+       if ( bytes_read == 0) {
+               PrintAndLog("File reading error");
+               free(decrypted);
+               return 3;
+       }
+
+       picopass_hdr *hdr = (picopass_hdr *)decrypted;
+               
+       uint8_t mem = hdr->conf.mem_config;
+       uint8_t chip = hdr->conf.chip_config;
+       uint8_t applimit = hdr->conf.app_limit;
+       uint8_t kb = 2;
+       uint8_t app_areas = 2;
+       uint8_t max_blk = 31;
+       getMemConfig(mem, chip, &max_blk, &app_areas, &kb);     
+       
+       //Use the first block (CSN) for filename
+       char outfilename[FILE_PATH_SIZE] = {0};
+       snprintf(outfilename, FILE_PATH_SIZE, "iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x-decrypted",
+                        hdr->csn[0],hdr->csn[1],hdr->csn[2],hdr->csn[3],
+                        hdr->csn[4],hdr->csn[5],hdr->csn[6],hdr->csn[7]);
+
+       // tripledes
+       des3_context ctx = { DES_DECRYPT ,{ 0 } };
+       des3_set2key_dec( &ctx, key);
+
+       uint8_t enc_dump[8] = {0};
+       uint8_t empty[8] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
+       for(uint16_t blocknum=0; blocknum < applimit; ++blocknum) {
+               
+               uint8_t idx = blocknum*8;
+               memcpy(enc_dump, decrypted + idx, 8);
+               
+               // block 7 or higher,  and not empty 0xFF
+               if(blocknum > 6 &&  memcmp(enc_dump, empty, 8) != 0 ) {
+                       des3_crypt_ecb(&ctx, enc_dump, decrypted + idx );
+               }
+               //printvar("decrypted block", decrypted + idx, 8);
+       }
+       
+       saveFile(outfilename, "bin", decrypted, fsize);
+       free(decrypted);
+       
+       printIclassDumpContents(decrypted, 1, (fsize/8), fsize);
+       return 0;
+}
+
+static int iClassEncryptBlkData(uint8_t *blkData) {
+       uint8_t key[16] = { 0 };
+       if(readKeyfile("iclass_decryptionkey.bin", 16, key)) {
+               usage_hf_iclass_encrypt();
+               return 1;
+       }
+       PrintAndLog("Decryption file found... ");
+       uint8_t encryptedData[16];
+       uint8_t *encrypted = encryptedData;
+       des3_context ctx = { DES_DECRYPT ,{ 0 } };
+       des3_set2key_enc( &ctx, key);
+       
+       des3_crypt_ecb(&ctx, blkData,encrypted);
+       //printvar("decrypted block", decrypted, 8);
+       memcpy(blkData,encrypted,8);
+
+       return 1;
+}
+
+int CmdHFiClassEncryptBlk(const char *Cmd) {
+       uint8_t blkData[8] = {0};
+       char opt = param_getchar(Cmd, 0);
+       if (strlen(Cmd)<1 || opt == 'h' || opt == 'H') return usage_hf_iclass_encrypt();
+
+       //get the bytes to encrypt
+       if (param_gethex(Cmd, 0, blkData, 16)) {
+               PrintAndLog("BlockData must include 16 HEX symbols");
+               return 0;
+       }
+       if (!iClassEncryptBlkData(blkData)) return 0;
+
+       printvar("encrypted block", blkData, 8);
+       return 1;
+}
+
+void Calc_wb_mac(uint8_t blockno, uint8_t *data, uint8_t *div_key, uint8_t MAC[4]) {
+       uint8_t WB[9];
+       WB[0] = blockno;
+       memcpy(WB + 1,data,8);
+       doMAC_N(WB,sizeof(WB),div_key,MAC);
+       //printf("Cal wb mac block [%02x][%02x%02x%02x%02x%02x%02x%02x%02x] : MAC [%02x%02x%02x%02x]",WB[0],WB[1],WB[2],WB[3],WB[4],WB[5],WB[6],WB[7],WB[8],MAC[0],MAC[1],MAC[2],MAC[3]);
+}
+
+static bool select_only(uint8_t *CSN, uint8_t *CCNR, bool use_credit_key, bool verbose) {
+       UsbCommand resp;
+
+       UsbCommand c = {CMD_READER_ICLASS, {0}};
+       c.arg[0] = FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_CC | FLAG_ICLASS_READER_ONE_TRY;
+       if (use_credit_key)
+               c.arg[0] |= FLAG_ICLASS_READER_CEDITKEY;
+
+       clearCommandBuffer();
+       SendCommand(&c);
+       if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
+               PrintAndLog("Command execute timeout");
+               return false;
+       }
+
+       uint8_t isOK = resp.arg[0] & 0xff;
+       uint8_t *data = resp.d.asBytes;
+
+       memcpy(CSN,data,8);
+       
+       if (CCNR!=NULL) 
+               memcpy(CCNR,data+16,8);
+       
+       if(isOK > 0) {
+               if (verbose) PrintAndLog("CSN: %s",sprint_hex(CSN,8));
+       }
+       
+       if(isOK <= 1){
+               PrintAndLog("Failed to obtain CC! Aborting");
+               return false;
+       }
+       return true;    
+}
+
+static bool select_and_auth(uint8_t *KEY, uint8_t *MAC, uint8_t *div_key, bool use_credit_key, bool elite, bool rawkey, bool verbose) {
+       uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+
+       if (!select_only(CSN, CCNR, use_credit_key, verbose))
+               return false;
+
+       //get div_key
+       if(rawkey)
+               memcpy(div_key, KEY, 8);
+       else
+               HFiClassCalcDivKey(CSN, KEY, div_key, elite);
+       
+       PrintAndLog("Authing with %s: %02x%02x%02x%02x%02x%02x%02x%02x", rawkey ? "raw key" : "diversified key", div_key[0],div_key[1],div_key[2],div_key[3],div_key[4],div_key[5],div_key[6],div_key[7]);
+
+       doMAC(CCNR, div_key, MAC);
+       UsbCommand resp;
+       UsbCommand d = {CMD_ICLASS_AUTHENTICATION, {0}};
+       memcpy(d.d.asBytes, MAC, 4);
+       clearCommandBuffer();
+       SendCommand(&d);
+       if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
+               PrintAndLog("Auth Command execute timeout");
+               return false;
+       }
+       uint8_t isOK = resp.arg[0] & 0xff;
+       if (!isOK) {
+               PrintAndLog("Authentication error");
+               return false;
+       }
+       return true;
+}
+
+int CmdHFiClassReader_Dump(const char *Cmd) {
+
+       uint8_t MAC[4] = {0x00,0x00,0x00,0x00};
+       uint8_t div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t c_div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t blockno = 0;
+       uint8_t numblks = 0;
+       uint8_t maxBlk = 31;
+       uint8_t app_areas = 1;
+       uint8_t kb = 2;
+       uint8_t KEY[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t CreditKEY[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t keyNbr = 0;
+       uint8_t dataLen = 0;
+       uint8_t fileNameLen = 0;
+       char filename[FILE_PATH_SIZE]={0};
+       char tempStr[50] = {0};
+       bool have_debit_key = false;
+       bool have_credit_key = false;
+       bool use_credit_key = false;
+       bool elite = false;
+       bool rawkey = false;
+       bool errors = false;
+       uint8_t cmdp = 0;
+
+       while(param_getchar(Cmd, cmdp) != 0x00)
+       {
+               switch(param_getchar(Cmd, cmdp))
+               {
+               case 'h':
+               case 'H':
+                       return usage_hf_iclass_dump();
+               case 'c':
+               case 'C':
+                       have_credit_key = true;
+                       dataLen = param_getstr(Cmd, cmdp+1, tempStr);
+                       if (dataLen == 16) {
+                               errors = param_gethex(tempStr, 0, CreditKEY, dataLen);
+                       } else if (dataLen == 1) {
+                               keyNbr = param_get8(Cmd, cmdp+1);
+                               if (keyNbr < ICLASS_KEYS_MAX) {
+                                       memcpy(CreditKEY, iClass_Key_Table[keyNbr], 8);
+                               } else {
+                                       PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
+                                       errors = true;
+                               }
+                       } else {
+                               PrintAndLog("\nERROR: Credit Key is incorrect length\n");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'e':
+               case 'E':
+                       elite = true;
+                       cmdp++;
+                       break;
+               case 'f':
+               case 'F':
+                       fileNameLen = param_getstr(Cmd, cmdp+1, filename); 
+                       if (fileNameLen < 1) {
+                               PrintAndLog("No filename found after f");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'k':
+               case 'K':
+                       have_debit_key = true;
+                       dataLen = param_getstr(Cmd, cmdp+1, tempStr);
+                       if (dataLen == 16) { 
+                               errors = param_gethex(tempStr, 0, KEY, dataLen);
+                       } else if (dataLen == 1) {
+                               keyNbr = param_get8(Cmd, cmdp+1);
+                               if (keyNbr < ICLASS_KEYS_MAX) {
+                                       memcpy(KEY, iClass_Key_Table[keyNbr], 8);
+                               } else {
+                                       PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
+                                       errors = true;
+                               }
+                       } else {
+                               PrintAndLog("\nERROR: Credit Key is incorrect length\n");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'r':
+               case 'R':
+                       rawkey = true;
+                       cmdp++;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if(errors) return usage_hf_iclass_dump();
+       }
+
+       if (cmdp < 2) return usage_hf_iclass_dump();
+       // if no debit key given try credit key on AA1 (not for iclass but for some picopass this will work)
+       if (!have_debit_key && have_credit_key) use_credit_key = true;
+
+       //get config and first 3 blocks
+       UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_CSN |
+                                       FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_ONE_TRY}};
+       UsbCommand resp;
+       uint8_t tag_data[255*8];
+
+       clearCommandBuffer();
+       SendCommand(&c);
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+               PrintAndLog("Command execute timeout");
+               ul_switch_off_field();
+               return 0;
+       }
+       uint8_t readStatus = resp.arg[0] & 0xff;
+       uint8_t * data  = resp.d.asBytes;
+
+       if(readStatus == 0){
+               PrintAndLog("No tag found...");
+               ul_switch_off_field();
+               return 0;
+       }
+       
+       if( readStatus & (FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_CC)){
+               memcpy(tag_data, data, 8*3);
+               blockno += 2; // 2 to force re-read of block 2 later. (seems to respond differently..)
+               numblks = data[8];
+               getMemConfig(data[13], data[12], &maxBlk, &app_areas, &kb);
+               // large memory - not able to dump pages currently
+               if (numblks > maxBlk) numblks = maxBlk;
+       }
+       
+       ul_switch_off_field();
+       // authenticate debit key and get div_key - later store in dump block 3
+       if (!select_and_auth(KEY, MAC, div_key, use_credit_key, elite, rawkey, false)){
+               //try twice - for some reason it sometimes fails the first time...
+               if (!select_and_auth(KEY, MAC, div_key, use_credit_key, elite, rawkey, false)){
+                       ul_switch_off_field();
+                       return 0;
+               }
+       }
+       
+       // begin dump
+       UsbCommand w = {CMD_ICLASS_DUMP, {blockno, numblks-blockno+1}};
+       clearCommandBuffer();
+       SendCommand(&w);
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+               PrintAndLog("Command execute time-out 1");
+               ul_switch_off_field();
+               return 1;
+       }
+       uint32_t blocksRead = resp.arg[1];
+       uint8_t isOK = resp.arg[0] & 0xff;
+       if (!isOK && !blocksRead) {
+               PrintAndLog("Read Block Failed");
+               ul_switch_off_field();
+               return 0;
+       }
+       uint32_t startindex = resp.arg[2];
+       if (blocksRead*8 > sizeof(tag_data)-(blockno*8)) {
+               PrintAndLog("Data exceeded Buffer size!");
+               blocksRead = (sizeof(tag_data)/8) - blockno;
+       }
+       // response ok - now get bigbuf content of the dump
+       GetFromBigBuf(tag_data+(blockno*8), blocksRead*8, startindex);
+       WaitForResponse(CMD_ACK,NULL);
+       size_t gotBytes = blocksRead*8 + blockno*8;
+
+       // try AA2
+       if (have_credit_key) {
+               //turn off hf field before authenticating with different key
+               ul_switch_off_field();
+               memset(MAC,0,4);
+               // AA2 authenticate credit key and git c_div_key - later store in dump block 4
+               if (!select_and_auth(CreditKEY, MAC, c_div_key, true, false, false, false)){
+                       //try twice - for some reason it sometimes fails the first time...
+                       if (!select_and_auth(CreditKEY, MAC, c_div_key, true, false, false, false)){
+                               ul_switch_off_field();
+                               return 0;
+                       }
+               }
+               // do we still need to read more block?  (aa2 enabled?)
+               if (maxBlk > blockno+numblks+1) {
+                       // setup dump and start
+                       w.arg[0] = blockno + blocksRead;
+                       w.arg[1] = maxBlk - (blockno + blocksRead);
+                       clearCommandBuffer();
+                       SendCommand(&w);
+                       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+                               PrintAndLog("Command execute timeout 2");
+                               ul_switch_off_field();
+                               return 0;
+                       }
+                       uint8_t isOK = resp.arg[0] & 0xff;
+                       blocksRead = resp.arg[1];
+                       if (!isOK && !blocksRead) {
+                               PrintAndLog("Read Block Failed 2");
+                               ul_switch_off_field();
+                               return 0;
+                       }               
+
+                       startindex = resp.arg[2];
+                       if (blocksRead*8 > sizeof(tag_data)-gotBytes) {
+                               PrintAndLog("Data exceeded Buffer size!");
+                               blocksRead = (sizeof(tag_data) - gotBytes)/8;
+                       }
+                       // get dumped data from bigbuf
+                       GetFromBigBuf(tag_data+gotBytes, blocksRead*8, startindex);
+                       WaitForResponse(CMD_ACK,NULL);
+
+                       gotBytes += blocksRead*8;                       
+               } else { //field is still on - turn it off...
+                       ul_switch_off_field();
+               }
+       }
+
+       // add diversified keys to dump
+       if (have_debit_key) memcpy(tag_data+(3*8),div_key,8);
+       if (have_credit_key) memcpy(tag_data+(4*8),c_div_key,8);
+       
+       printf("Num of bytes:  %zu\n", gotBytes);
+       
+       // print the dump
+       printf("------+--+-------------------------+\n");
+       printf("CSN   |00| %s|\n", sprint_hex(tag_data, 8));    
+       //printIclassDumpContents(tag_data, 1, (gotBytes/8)-1, gotBytes-8);
+       printIclassDumpContents(tag_data, 1, (gotBytes/8), gotBytes);
+
+       if (filename[0] == 0){
+               snprintf(filename, FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x",
+                   tag_data[0],tag_data[1],tag_data[2],tag_data[3],
+                   tag_data[4],tag_data[5],tag_data[6],tag_data[7]);
+       }
+
+       // save the dump to .bin file
+       PrintAndLog("Saving dump file - %d blocks read", gotBytes/8);
+       saveFile(filename, "bin", tag_data, gotBytes);
+       return 1;
+}
+
+static int WriteBlock(uint8_t blockno, uint8_t *bldata, uint8_t *KEY, bool use_credit_key, bool elite, bool rawkey, bool verbose) {
+       uint8_t MAC[4]={0x00,0x00,0x00,0x00};
+       uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       if (!select_and_auth(KEY, MAC, div_key, use_credit_key, elite, rawkey, verbose))
+               return 0;
+
+       UsbCommand resp;
+
+       Calc_wb_mac(blockno,bldata,div_key,MAC);
+       UsbCommand w = {CMD_ICLASS_WRITEBLOCK, {blockno}};
+       memcpy(w.d.asBytes, bldata, 8);
+       memcpy(w.d.asBytes + 8, MAC, 4);
+       
+       clearCommandBuffer();
+       SendCommand(&w);
+       if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
+               PrintAndLog("Write Command execute timeout");
+               return 0;
+       }
+       uint8_t isOK = resp.arg[0] & 0xff;
+       if (!isOK) {
+               PrintAndLog("Write Block Failed");
+               return 0;
+       }
+       PrintAndLog("Write Block Successful");
+       return 1;
+}
+
+int CmdHFiClass_WriteBlock(const char *Cmd) {
+       uint8_t blockno=0;
+       uint8_t bldata[8]={0,0,0,0,0,0,0,0};
+       uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t keyNbr = 0;
+       uint8_t dataLen = 0;
+       char tempStr[50] = {0};
+       bool use_credit_key = false;
+       bool elite = false;
+       bool rawkey= false;
+       bool errors = false;
+       uint8_t cmdp = 0;
+       while(param_getchar(Cmd, cmdp) != 0x00)
+       {
+               switch(param_getchar(Cmd, cmdp))
+               {
+               case 'h':
+               case 'H':
+                       return usage_hf_iclass_writeblock();
+               case 'b':
+               case 'B':
+                       if (param_gethex(Cmd, cmdp+1, &blockno, 2)) {
+                               PrintAndLog("Block No must include 2 HEX symbols\n");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'c':
+               case 'C':
+                       use_credit_key = true;
+                       cmdp++;
+                       break;
+               case 'd':
+               case 'D':
+                       if (param_gethex(Cmd, cmdp+1, bldata, 16))
+                       {
+                               PrintAndLog("KEY must include 16 HEX symbols\n");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'e':
+               case 'E':
+                       elite = true;
+                       cmdp++;
+                       break;
+               case 'k':
+               case 'K':
+                       dataLen = param_getstr(Cmd, cmdp+1, tempStr);
+                       if (dataLen == 16) { 
+                               errors = param_gethex(tempStr, 0, KEY, dataLen);
+                       } else if (dataLen == 1) {
+                               keyNbr = param_get8(Cmd, cmdp+1);
+                               if (keyNbr < ICLASS_KEYS_MAX) {
+                                       memcpy(KEY, iClass_Key_Table[keyNbr], 8);
+                               } else {
+                                       PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
+                                       errors = true;
+                               }
+                       } else {
+                               PrintAndLog("\nERROR: Credit Key is incorrect length\n");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'r':
+               case 'R':
+                       rawkey = true;
+                       cmdp++;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if(errors) return usage_hf_iclass_writeblock();