]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - client/cmdhficlass.c
Bugfix: Output typing on print of HID card formats (#895)
[proxmark3-svn] / client / cmdhficlass.c
index 31f7ba973f8d2a956194d9152fdf65584b3f76a7..3b9fccdc89e3064aee1ff916642686bfd881e3d3 100644 (file)
@@ -2,6 +2,7 @@
 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>, Hagen Fritsch
 // Copyright (C) 2011 Gerhard de Koning Gans
 // Copyright (C) 2014 Midnitesnake & Andy Davies & Martin Holst Swende
+// Copyright (C) 2019 piwi
 //
 // 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
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
+#include <ctype.h>
 #include "iso14443crc.h" // Can also be used for iClass, using 0xE012 as CRC-type
-#include "data.h"
-#include "proxmark3.h"
+#include "comms.h"
 #include "ui.h"
+#include "cliparser/cliparser.h"
 #include "cmdparser.h"
 #include "cmdhficlass.h"
 #include "common.h"
 #include "util.h"
 #include "cmdmain.h"
-#include "loclass/des.h"
+#include "mbedtls/des.h"
 #include "loclass/cipherutils.h"
 #include "loclass/cipher.h"
 #include "loclass/ikeys.h"
 #include "loclass/elite_crack.h"
 #include "loclass/fileutils.h"
 #include "protocols.h"
+#include "usb_cmd.h"
+#include "cmdhfmfu.h"
+#include "util_posix.h"
+#include "cmdhf14a.h" // DropField()
+
+
+#define ICLASS_KEYS_MAX 8
+static uint8_t iClass_Key_Table[ICLASS_KEYS_MAX][8] = {
+               { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
+               { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
+               { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
+               { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
+               { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
+               { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
+               { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
+               { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }
+};
+
+
+typedef struct iclass_block {
+       uint8_t d[8];
+} iclass_block_t;
+
+
+// iclass / picopass chip config structures and shared routines
+typedef struct {
+       uint8_t app_limit;      //[8]
+       uint8_t otp[2];         //[9-10]
+       uint8_t block_writelock;//[11]
+       uint8_t chip_config;    //[12]
+       uint8_t mem_config;     //[13]
+       uint8_t eas;            //[14]
+       uint8_t fuses;          //[15]
+} picopass_conf_block;
+
+typedef struct {
+       uint8_t csn[8];
+       picopass_conf_block conf;
+       uint8_t epurse[8];
+       uint8_t key_d[8];
+       uint8_t key_c[8];
+       uint8_t app_issuer_area[8];
+} picopass_hdr;
+
+
+static void fuse_config(const picopass_hdr *hdr) {
+       uint8_t fuses = hdr->conf.fuses;
+
+       if (fuses & FUSE_FPERS)
+               PrintAndLog("  Mode: Personalization [Programmable]");
+       else
+               PrintAndLog("  Mode: Application [Locked]");
+
+       if (fuses & FUSE_CODING1)
+               PrintAndLog("Coding: RFU");
+       else {
+               if (fuses & FUSE_CODING0)
+                       PrintAndLog("Coding: ISO 14443-2 B/ISO 15693");
+               else
+                       PrintAndLog("Coding: ISO 14443B only");
+       }
+       if ((fuses & FUSE_CRYPT1) && (fuses & FUSE_CRYPT0)) PrintAndLog(" Crypt: Secured page, keys not locked");
+       if ((fuses & FUSE_CRYPT1) && !(fuses & FUSE_CRYPT0)) PrintAndLog(" Crypt: Secured page, keys locked");
+       if (!(fuses & FUSE_CRYPT1) && (fuses & FUSE_CRYPT0)) PrintAndLog(" Crypt: Non secured page");
+       if (!(fuses & FUSE_CRYPT1) && !(fuses & FUSE_CRYPT0)) PrintAndLog(" Crypt: No auth possible. Read only if RA is enabled");
+
+       if (fuses & FUSE_RA)
+               PrintAndLog("    RA: Read access enabled");
+       else
+               PrintAndLog("    RA: Read access not enabled");
+}
+
+
+static void getMemConfig(uint8_t mem_cfg, uint8_t chip_cfg, uint8_t *max_blk, uint8_t *app_areas, uint8_t *kb) {
+       // mem-bit 5, mem-bit 7, chip-bit 4: defines chip type
+       if((chip_cfg & 0x10) && !(mem_cfg & 0x80) && !(mem_cfg & 0x20)) {
+               *kb = 2;
+               *app_areas = 2;
+               *max_blk = 31;
+       } else if((chip_cfg & 0x10) && (mem_cfg & 0x80) && !(mem_cfg & 0x20)) {
+               *kb = 16;
+               *app_areas = 2;
+               *max_blk = 255; //16kb
+       } else if(!(chip_cfg & 0x10) && !(mem_cfg & 0x80) && !(mem_cfg & 0x20)) {
+               *kb = 16;
+               *app_areas = 16;
+               *max_blk = 255; //16kb
+       } else if((chip_cfg & 0x10) && (mem_cfg & 0x80) && (mem_cfg & 0x20)) {
+               *kb = 32;
+               *app_areas = 3;
+               *max_blk = 255; //16kb
+       } else if(!(chip_cfg & 0x10) && !(mem_cfg & 0x80) && (mem_cfg & 0x20)) {
+               *kb = 32;
+               *app_areas = 17;
+               *max_blk = 255; //16kb
+       } else {
+               *kb = 32;
+               *app_areas = 2;
+               *max_blk = 255;
+       }
+}
+
+
+static void mem_app_config(const picopass_hdr *hdr) {
+       uint8_t mem = hdr->conf.mem_config;
+       uint8_t chip = hdr->conf.chip_config;
+       uint8_t applimit = hdr->conf.app_limit;
+       if (applimit < 6) applimit = 26;
+       uint8_t kb = 2;
+       uint8_t app_areas = 2;
+       uint8_t max_blk = 31;
+       getMemConfig(mem, chip, &max_blk, &app_areas, &kb);
+       PrintAndLog("   Mem: %u KBits/%u App Areas (%u * 8 bytes) [%02X]", kb, app_areas, max_blk+1, mem);
+       PrintAndLog("   AA1: blocks 06-%02X", applimit);
+       PrintAndLog("   AA2: blocks %02X-%02X", applimit+1, max_blk);
+}
+
+
+static void printIclassDumpInfo(uint8_t* iclass_dump) {
+       fuse_config((picopass_hdr*)iclass_dump);
+       mem_app_config((picopass_hdr*)iclass_dump);
+}
 
-static int CmdHelp(const char *Cmd);
 
-int xorbits_8(uint8_t val)
-{
-       uint8_t res = val ^ (val >> 1); //1st pass
-       res = res ^ (res >> 1);                 // 2nd pass
-       res = res ^ (res >> 2);                 // 3rd pass
-       res = res ^ (res >> 4);                         // 4th pass
-       return res & 1;
+static void usage_hf_iclass_chk(void) {
+       PrintAndLog("Checkkeys loads a dictionary text file with 8byte hex keys to test authenticating against a iClass tag");
+       PrintAndLog("Usage: hf iclass chk [h|e|r] <f  (*.dic)>");
+       PrintAndLog("Options:");
+       PrintAndLog("h             Show this help");
+       PrintAndLog("f <filename>  Dictionary file with default iclass keys");
+       PrintAndLog("      e             target Elite / High security key scheme");
+       PrintAndLog("      r             interpret dictionary file as raw (diversified keys)");
+       PrintAndLog("Samples:");
+       PrintAndLog("        hf iclass chk f default_iclass_keys.dic");
+       PrintAndLog("        hf iclass chk f default_iclass_keys.dic e");
 }
 
-int CmdHFiClassList(const char *Cmd)
-{
+
+static int CmdHFiClassList(const char *Cmd) {
        PrintAndLog("Deprecated command, use 'hf list iclass' instead");
        return 0;
 }
 
-int CmdHFiClassSnoop(const char *Cmd)
-{
-       UsbCommand c = {CMD_SNOOP_ICLASS};
+
+static int CmdHFiClassSnoop(const char *Cmd) {
+
+       CLIParserInit("hf iclass snoop", "\nSnoop a communication between an iClass Reader and an iClass Tag.", NULL);
+       void* argtable[] = {
+               arg_param_begin,
+               arg_lit0("j",  "jam",    "Jam (prevent) e-purse Updates"),
+               arg_param_end
+       };
+       if (CLIParserParseString(Cmd, argtable, arg_getsize(argtable), true)){
+               CLIParserFree();
+               return 0;
+       }
+
+       bool jam_epurse_update = arg_get_lit(1);
+
+       const uint8_t update_epurse_sequence[2] = {0x87, 0x02};
+               
+       UsbCommand c = {CMD_SNOOP_ICLASS, {0}};
+       if (jam_epurse_update) {
+               c.arg[0] = sizeof(update_epurse_sequence);
+               memcpy(c.d.asBytes, update_epurse_sequence, sizeof(update_epurse_sequence));
+       }
        SendCommand(&c);
+
        return 0;
 }
-int usage_hf_iclass_sim()
-{
+
+
+static void usage_hf_iclass_sim(void) {
        PrintAndLog("Usage:  hf iclass sim <option> [CSN]");
        PrintAndLog("        options");
        PrintAndLog("                0 <CSN> simulate the given CSN");
@@ -66,59 +215,73 @@ int usage_hf_iclass_sim()
        PrintAndLog("        example: hf iclass sim 2");
        PrintAndLog("        example: hf iclass eload 'tagdump.bin'");
        PrintAndLog("                 hf iclass sim 3");
-       return 0;
 }
 
+
+// the original malicious IDs from Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult,
+// and Milosch Meriac. Dismantling iClass and iClass Elite.
 #define NUM_CSNS 15
-int CmdHFiClassSim(const char *Cmd)
-{
+static uint8_t csns[8 * NUM_CSNS] = {
+       0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x04, 0x0E, 0x08, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x09, 0x0D, 0x05, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x0A, 0x0C, 0x06, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x0F, 0x0B, 0x03, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x08, 0x0A, 0x0C, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x0D, 0x09, 0x09, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x0E, 0x08, 0x0A, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x03, 0x07, 0x17, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x3C, 0x06, 0xE0, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x01, 0x05, 0x1D, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x02, 0x04, 0x1E, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x07, 0x03, 0x1B, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x00, 0x02, 0x24, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x05, 0x01, 0x21, 0xF7, 0xFF, 0x12, 0xE0 };
+
+
+// pre-defined 9 CSNs by iceman.
+// only one csn depend on several others.
+// six depends only on the first csn,  (0,1, 0x45)
+
+// #define NUM_CSNS 9
+// static uint8_t csns[8 * NUM_CSNS] = {
+       // 0x01, 0x0A, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0,
+       // 0x0C, 0x06, 0x0C, 0xFE, 0xF7, 0xFF, 0x12, 0xE0,
+       // 0x10, 0x97, 0x83, 0x7B, 0xF7, 0xFF, 0x12, 0xE0,
+       // 0x13, 0x97, 0x82, 0x7A, 0xF7, 0xFF, 0x12, 0xE0,
+       // 0x07, 0x0E, 0x0D, 0xF9, 0xF7, 0xFF, 0x12, 0xE0,
+       // 0x14, 0x96, 0x84, 0x76, 0xF7, 0xFF, 0x12, 0xE0,
+       // 0x17, 0x96, 0x85, 0x71, 0xF7, 0xFF, 0x12, 0xE0,
+       // 0xCE, 0xC5, 0x0F, 0x77, 0xF7, 0xFF, 0x12, 0xE0,
+       // 0xD2, 0x5A, 0x82, 0xF8, 0xF7, 0xFF, 0x12, 0xE0
+       // //0x04, 0x08, 0x9F, 0x78, 0x6E, 0xFF, 0x12, 0xE0
+// };
+
+
+static int CmdHFiClassSim(const char *Cmd) {
        uint8_t simType = 0;
        uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
 
-       if (strlen(Cmd)<1) {
-               return usage_hf_iclass_sim();
+       if (strlen(Cmd) < 1) {
+               usage_hf_iclass_sim();
+               return 0;
        }
        simType = param_get8ex(Cmd, 0, 0, 10);
 
-       if(simType == 0)
-       {
+       if (simType == ICLASS_SIM_MODE_CSN) {
                if (param_gethex(Cmd, 1, CSN, 16)) {
                        PrintAndLog("A CSN should consist of 16 HEX symbols");
-                       return usage_hf_iclass_sim();
+                       usage_hf_iclass_sim();
+                       return 0;
                }
-
                PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
        }
-       if(simType > 3)
-       {
-               PrintAndLog("Undefined simptype %d", simType);
-               return usage_hf_iclass_sim();
-       }
 
-       uint8_t numberOfCSNs=0;
-       if(simType == 2)
-       {
-               UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,NUM_CSNS}};
+       if (simType == ICLASS_SIM_MODE_READER_ATTACK) {
+               UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType, NUM_CSNS}};
                UsbCommand resp = {0};
 
-               uint8_t csns[8*NUM_CSNS] = {
-                       0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x04, 0x0E, 0x08, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x09, 0x0D, 0x05, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x0A, 0x0C, 0x06, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x0F, 0x0B, 0x03, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x08, 0x0A, 0x0C, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x0D, 0x09, 0x09, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x0E, 0x08, 0x0A, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x03, 0x07, 0x17, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x3C, 0x06, 0xE0, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x01, 0x05, 0x1D, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x02, 0x04, 0x1E, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x07, 0x03, 0x1B, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x00, 0x02, 0x24, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x05, 0x01, 0x21, 0xF7, 0xFF, 0x12, 0xE0 };
-
-               memcpy(c.d.asBytes, csns, 8*NUM_CSNS);
+               memcpy(c.d.asBytes, csns, 8 * NUM_CSNS);
 
                SendCommand(&c);
                if (!WaitForResponseTimeout(CMD_ACK, &resp, -1)) {
@@ -127,9 +290,9 @@ int CmdHFiClassSim(const char *Cmd)
                }
 
                uint8_t num_mac_responses  = resp.arg[1];
-               PrintAndLog("Mac responses: %d MACs obtained (should be %d)", num_mac_responses,NUM_CSNS);
+               PrintAndLog("Mac responses: %d MACs obtained (should be %d)", num_mac_responses, NUM_CSNS);
 
-               size_t datalen = NUM_CSNS*24;
+               size_t datalen = NUM_CSNS * 24;
                /*
                 * Now, time to dump to file. We'll use this format:
                 * <8-byte CSN><8-byte CC><4 byte NR><4 byte MAC>....
@@ -137,281 +300,138 @@ int CmdHFiClassSim(const char *Cmd)
                 * 8 * 24 bytes.
                 *
                 * The returndata from the pm3 is on the following format
-                * <4 byte NR><4 byte MAC>
-                * CC are all zeroes, CSN is the same as was sent in
+                * <8 byte CC><4 byte NR><4 byte MAC>
+                * CSN is the same as was sent in
                 **/
                void* dump = malloc(datalen);
-               memset(dump,0,datalen);//<-- Need zeroes for the CC-field
-               uint8_t i = 0;
-               for(i = 0 ; i < NUM_CSNS ; i++)
-               {
-                       memcpy(dump+i*24, csns+i*8,8); //CSN
-                       //8 zero bytes here...
+               for(int i = 0; i < NUM_CSNS; i++) {
+                       memcpy(dump + i*24, csns+i*8, 8); //CSN
+                       //copy CC from response
+                       memcpy(dump + i*24 + 8, resp.d.asBytes + i*16, 8);
                        //Then comes NR_MAC (eight bytes from the response)
-                       memcpy(dump+i*24+16,resp.d.asBytes+i*8,8);
-
+                       memcpy(dump + i*24 + 16, resp.d.asBytes + i*16 + 8, 8);
                }
                /** Now, save to dumpfile **/
                saveFile("iclass_mac_attack", "bin", dump,datalen);
                free(dump);
-       }else
-       {
-               UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
+
+       } else if (simType == ICLASS_SIM_MODE_CSN || simType == ICLASS_SIM_MODE_CSN_DEFAULT || simType == ICLASS_SIM_MODE_FULL) {
+               UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType, 0}};
                memcpy(c.d.asBytes, CSN, 8);
                SendCommand(&c);
+
+       } else {
+               PrintAndLog("Undefined simtype %d", simType);
+               usage_hf_iclass_sim();
+               return 0;
        }
 
        return 0;
 }
 
-int CmdHFiClassReader(const char *Cmd)
-{
-       UsbCommand c = {CMD_READER_ICLASS, {0}};
-       SendCommand(&c);
+
+int HFiClassReader(bool loop, bool verbose) {
+
+       bool tagFound = false;
+       UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_INIT | FLAG_ICLASS_READER_CLEARTRACE | FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_CC | FLAG_ICLASS_READER_AA} };
        UsbCommand resp;
-       while(!ukbhit()){
-               if (WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
-                       uint8_t isOK    = resp.arg[0] & 0xff;
-                       uint8_t * data  = resp.d.asBytes;
-
-                       PrintAndLog("isOk:%02x", isOK);
-                       if( isOK == 0){
-                               //Aborted
-                               PrintAndLog("Quitting...");
+
+       while (!ukbhit()) {
+               SendCommand(&c);
+               if (WaitForResponseTimeout(CMD_ACK,&resp, 4500)) {
+                       uint8_t readStatus = resp.arg[0] & 0xff;
+                       uint8_t *data = resp.d.asBytes;
+
+                       // no tag found
+                       if (readStatus == 0 && !loop) {
+                               // abort
+                               if (verbose) PrintAndLog("Quitting...");
+                               DropField();
                                return 0;
                        }
-                       if(isOK > 0)
-                       {
-                               PrintAndLog("CSN: %s",sprint_hex(data,8));
+
+                       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(isOK >= 1)
-                       {
-                               PrintAndLog("CC: %s",sprint_hex(data+8,8));
-                       }else{
-                               PrintAndLog("No CC obtained");
+                       if (readStatus & FLAG_ICLASS_READER_CONF) {
+                               printIclassDumpInfo(data);
                        }
+                       if (readStatus & FLAG_ICLASS_READER_AA) {
+                               bool legacy = true;
+                               PrintAndLog(" AppIA: %s",sprint_hex(data+8*5,8));
+                               for (int i = 0; i<8; i++) {
+                                       if (data[8*5+i] != 0xFF) {
+                                               legacy = false;
+                                       }
+                               }
+                               PrintAndLog("      : Possible iClass %s",(legacy) ? "(legacy tag)" : "(NOT legacy tag)");
+                       }
+
+                       if (tagFound && !loop) return 1;
                } else {
-                       PrintAndLog("Command execute timeout");
+                       if (verbose) PrintAndLog("Command execute timeout");
                }
+               if (!loop) break;
        }
 
+       DropField();
        return 0;
 }
 
-int CmdHFiClassReader_Replay(const char *Cmd)
-{
-       uint8_t readerType = 0;
-       uint8_t MAC[4]={0x00, 0x00, 0x00, 0x00};
-
-       if (strlen(Cmd)<1) {
-               PrintAndLog("Usage:  hf iclass replay <MAC>");
-               PrintAndLog("        sample: hf iclass replay 00112233");
-               return 0;
-       }
-
-       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);
-       SendCommand(&c);
 
-       return 0;
+static void usage_hf_iclass_reader(void) {
+       PrintAndLogEx(NORMAL, "Act as a Iclass reader.  Look for iClass tags until Enter or the pm3 button is pressed\n");
+       PrintAndLogEx(NORMAL, "Usage:  hf iclass reader [h] [1]\n");
+       PrintAndLogEx(NORMAL, "Options:");
+       PrintAndLogEx(NORMAL, "    h   This help text");
+       PrintAndLogEx(NORMAL, "    1   read only 1 tag");
+       PrintAndLogEx(NORMAL, "Examples:");
+       PrintAndLogEx(NORMAL, "        hf iclass reader 1");
 }
 
-int CmdHFiClassReader_Dump(const char *Cmd)
-{
-       uint8_t readerType = 0;
-       uint8_t MAC[4]={0x00,0x00,0x00,0x00};
-       uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
-       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};
-       //uint8_t CC_temp[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
-       uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
-       uint8_t keytable[128] = {0};
-       int elite = 0;
-       uint8_t *used_key;
-       int i;
-       if (strlen(Cmd)<1)
-       {
-               PrintAndLog("Usage:  hf iclass dump <Key> [e]");
-               PrintAndLog("        Key    - A 16 byte master key");
-               PrintAndLog("        e      - If 'e' is specified, the key is interpreted as the 16 byte");
-               PrintAndLog("                 Custom Key (KCus), which can be obtained via reader-attack");
-               PrintAndLog("                 See 'hf iclass sim 2'. This key should be on iclass-format");
-               PrintAndLog("        sample: hf iclass dump 0011223344556677");
-
-
-               return 0;
-       }
-
-       if (param_gethex(Cmd, 0, KEY, 16))
-       {
-               PrintAndLog("KEY must include 16 HEX symbols");
-               return 1;
-       }
-
-       if (param_getchar(Cmd, 1) == 'e')
-       {
-               PrintAndLog("Elite switch on");
-               elite = 1;
-
-               //calc h2
-               hash2(KEY, keytable);
-               printarr_human_readable("keytable", keytable, 128);
-
-       }
-
-       UsbCommand resp;
-       uint8_t key_sel[8] = {0};
-       uint8_t key_sel_p[8] = { 0 };
-
-       UsbCommand c = {CMD_READER_ICLASS, {0}};
-       c.arg[0] = FLAG_ICLASS_READER_ONLY_ONCE| FLAG_ICLASS_READER_GET_CC;
-       SendCommand(&c);
-
-
-
-       if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
-       {
-               PrintAndLog("Command execute timeout");
-               return 0;
-       }
 
-       uint8_t isOK    = resp.arg[0] & 0xff;
-       uint8_t * data  = resp.d.asBytes;
-
-       memcpy(CSN,data,8);
-       memcpy(CCNR,data+8,8);
-
-       PrintAndLog("isOk:%02x", isOK);
-
-       if(isOK > 0)
-       {
-               PrintAndLog("CSN: %s",sprint_hex(CSN,8));
-       }
-       if(isOK <= 1){
-               PrintAndLog("Failed to obtain CC! Aborting");
+static int CmdHFiClassReader(const char *Cmd) {
+       char cmdp = tolower(param_getchar(Cmd, 0));
+       if (cmdp == 'h') {
+               usage_hf_iclass_reader();
                return 0;
        }
-       //Status 2 or higher
-
-       if(elite)
-       {
-               //Get the key index (hash1)
-               uint8_t key_index[8] = {0};
-
-               hash1(CSN, key_index);
-               printvar("hash1", key_index,8);
-               for(i = 0; i < 8 ; i++)
-                       key_sel[i] = keytable[key_index[i]] & 0xFF;
-               PrintAndLog("Pre-fortified 'permuted' HS key that would be needed by an iclass reader to talk to above CSN:");
-               printvar("k_sel", key_sel,8);
-               //Permute from iclass format to standard format
-               permutekey_rev(key_sel,key_sel_p);
-               used_key = key_sel_p;
-       }else{
-               used_key = KEY;
-       }
-
-       PrintAndLog("Pre-fortified key that would be needed by the OmniKey reader to talk to above CSN:");
-       printvar("Used key",used_key,8);
-       diversifyKey(CSN,used_key, div_key);
-       PrintAndLog("Hash0, a.k.a diversified key, that is computed using Ksel and stored in the card (Block 3):");
-       printvar("Div key", div_key, 8);
-       printvar("CC_NR:",CCNR,12);
-       doMAC(CCNR,div_key, MAC);
-       printvar("MAC", MAC, 4);
-
-       uint8_t iclass_data[32000] = {0};
-       uint32_t iclass_datalen = 0;
-       uint32_t iclass_blocksFailed = 0;//Set to 1 if dump was incomplete
-
-       UsbCommand d = {CMD_READER_ICLASS_REPLAY, {readerType}};
-       memcpy(d.d.asBytes, MAC, 4);
-       clearCommandBuffer();
-       SendCommand(&d);
-       PrintAndLog("Waiting for device to dump data. Press button on device and key on keyboard to abort...");
-       while (true) {
-               printf(".");
-               if (ukbhit()) {
-                       getchar();
-                       printf("\naborted via keyboard!\n");
-                       break;
-               }
-               if(WaitForResponseTimeout(CMD_ACK,&resp,4500))
-               {
-                       uint32_t dataLength = resp.arg[0];
-                       iclass_blocksFailed |= resp.arg[1];
-                       if(dataLength > 0)
-                       {
-                               PrintAndLog("Got %d bytes data (total so far %d)" ,dataLength,iclass_datalen);
-                               memcpy(iclass_data, resp.d.asBytes,dataLength);
-                               iclass_datalen += dataLength;
-                       }else
-                       {//Last transfer, datalength 0 means the dump is finished
-                               PrintAndLog("Dumped %d bytes of data from tag. ", iclass_datalen);
-                               if(iclass_blocksFailed)
-                               {
-                                       PrintAndLog("OBS! Some blocks failed to be dumped correctly!");
-                               }
-                               if(iclass_datalen > 0)
-                               {
-                                       char filename[100] = {0};
-                                       //create a preferred filename
-                                       snprintf(filename, 100,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x",
-                                                        CSN[0],CSN[1],CSN[2],CSN[3],
-                                                       CSN[4],CSN[5],CSN[6],CSN[7]);
-                                       //Place the div_key in block 3
-                                       memcpy(iclass_data+(3*8), div_key, 8);
-                                       saveFile(filename,"bin",iclass_data, iclass_datalen );
-                               }
-                               //Aaaand we're finished
-                               return 0;
-                       }
-               }
-       }
-
-
-       return 0;
+       bool findone = (cmdp == '1') ? false : true;
+       return HFiClassReader(findone, true);
 }
 
-int hf_iclass_eload_usage()
-{
+
+static void usage_hf_iclass_eload(void) {
        PrintAndLog("Loads iclass tag-dump into emulator memory on device");
        PrintAndLog("Usage:  hf iclass eload f <filename>");
        PrintAndLog("");
        PrintAndLog("Example: hf iclass eload f iclass_tagdump-aa162d30f8ff12f1.bin");
-       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);
-       SendCommand(&c);
-       return 0;
-}
-int CmdHFiClassELoad(const char *Cmd)
-{
+
+static int CmdHFiClassELoad(const char *Cmd) {
 
        char opt = param_getchar(Cmd, 0);
-       if (strlen(Cmd)<1 || opt == 'h')
-               return hf_iclass_eload_usage();
+       if (strlen(Cmd)<1 || opt == 'h') {
+               usage_hf_iclass_eload();
+               return 0;
+       }
 
        //File handling and reading
        FILE *f;
        char filename[FILE_PATH_SIZE];
-       if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0)
-       {
+       if (opt == 'f' && param_getstr(Cmd, 1, filename, sizeof(filename)) > 0) {
                f = fopen(filename, "rb");
-       }else{
-               return hf_iclass_eload_usage();
+       } else {
+               usage_hf_iclass_eload();
+               return 0;
        }
 
-       if(!f) {
+       if (!f) {
                PrintAndLog("Failed to read from file '%s'", filename);
                return 1;
        }
@@ -420,8 +440,13 @@ int CmdHFiClassELoad(const char *Cmd)
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 
-       uint8_t *dump = malloc(fsize);
+       if (fsize < 0) {
+               PrintAndLog("Error, when getting filesize");
+               fclose(f);
+               return 1;
+       }
 
+       uint8_t *dump = malloc(fsize);
 
        size_t bytes_read = fread(dump, 1, fsize, f);
        fclose(f);
@@ -429,8 +454,7 @@ int CmdHFiClassELoad(const char *Cmd)
        printIclassDumpInfo(dump);
        //Validate
 
-       if (bytes_read < fsize)
-       {
+       if (bytes_read < fsize) {
                prnlog("Error, could only read %d bytes (should be %d)",bytes_read, fsize );
                free(dump);
                return 1;
@@ -439,10 +463,10 @@ int CmdHFiClassELoad(const char *Cmd)
        uint32_t bytes_sent = 0;
        uint32_t bytes_remaining  = bytes_read;
 
-       while(bytes_remaining > 0){
+       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);
+               memcpy(c.d.asBytes, dump+bytes_sent, bytes_in_packet);
                SendCommand(&c);
                bytes_remaining -= bytes_in_packet;
                bytes_sent += bytes_in_packet;
@@ -452,23 +476,8 @@ int CmdHFiClassELoad(const char *Cmd)
        return 0;
 }
 
-int usage_hf_iclass_decrypt()
-{
-       PrintAndLog("Usage: hf iclass decrypt f <tagdump> o ");
-       PrintAndLog("");
-       PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
-       PrintAndLog("in the working directory. The file should be 16 bytes binary data");
-       PrintAndLog("");
-       PrintAndLog("example: hf iclass decrypt f tagdump_12312342343.bin");
-       PrintAndLog("");
-       PrintAndLog("OBS! This is pretty stupid implementation, it tries to decrypt every block after block 6. ");
-       PrintAndLog("Correct behaviour would be to decrypt only the application areas where the key is valid,");
-       PrintAndLog("which is defined by the configuration block.");
-       return 1;
-}
 
-int readKeyfile(const char *filename, size_t len, uint8_t* buffer)
-{
+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);
@@ -492,8 +501,22 @@ int readKeyfile(const char *filename, size_t len, uint8_t* buffer)
        return 0;
 }
 
-int CmdHFiClassDecrypt(const char *Cmd)
-{
+
+static void usage_hf_iclass_decrypt(void) {
+       PrintAndLog("Usage: hf iclass decrypt f <tagdump>");
+       PrintAndLog("");
+       PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
+       PrintAndLog("in the working directory. The file should be 16 bytes binary data");
+       PrintAndLog("");
+       PrintAndLog("example: hf iclass decrypt f tagdump_12312342343.bin");
+       PrintAndLog("");
+       PrintAndLog("OBS! This is pretty stupid implementation, it tries to decrypt every block after block 6. ");
+       PrintAndLog("Correct behaviour would be to decrypt only the application areas where the key is valid,");
+       PrintAndLog("which is defined by the configuration block.");
+}
+
+
+static int CmdHFiClassDecrypt(const char *Cmd) {
        uint8_t key[16] = { 0 };
        if(readKeyfile("iclass_decryptionkey.bin", 16, key))
        {
@@ -502,17 +525,23 @@ int CmdHFiClassDecrypt(const char *Cmd)
        }
        PrintAndLog("Decryption file found... ");
        char opt = param_getchar(Cmd, 0);
-       if (strlen(Cmd)<1 || opt == 'h')
-               return usage_hf_iclass_decrypt();
+       if (strlen(Cmd)<1 || opt == 'h') {
+               usage_hf_iclass_decrypt();
+               return 0;
+       }
 
        //Open the tagdump-file
        FILE *f;
        char filename[FILE_PATH_SIZE];
-       if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0)
-       {
+       if(opt == 'f' && param_getstr(Cmd, 1, filename, sizeof(filename)) > 0) {
                f = fopen(filename, "rb");
-       }else{
-               return usage_hf_iclass_decrypt();
+               if ( f == NULL ) {
+                       PrintAndLog("Could not find file %s", filename);
+                       return 1;
+               }
+       } else {
+               usage_hf_iclass_decrypt();
+               return 0;
        }
 
        fseek(f, 0, SEEK_END);
@@ -520,8 +549,8 @@ int CmdHFiClassDecrypt(const char *Cmd)
        fseek(f, 0, SEEK_SET);
        uint8_t enc_dump[8] = {0};
        uint8_t *decrypted = malloc(fsize);
-       des3_context ctx = { DES_DECRYPT ,{ 0 } };
-       des3_set2key_dec( &ctx, key);
+       mbedtls_des3_context ctx = { {0} };
+       mbedtls_des3_set2key_dec( &ctx, key);
        size_t bytes_read = fread(enc_dump, 1, 8, f);
 
        //Use the first block (CSN) for filename
@@ -537,7 +566,7 @@ int CmdHFiClassDecrypt(const char *Cmd)
                {
                        memcpy(decrypted+(blocknum*8), enc_dump, 8);
                }else{
-                       des3_crypt_ecb(&ctx, enc_dump,decrypted +(blocknum*8) );
+                       mbedtls_des3_crypt_ecb(&ctx, enc_dump,decrypted +(blocknum*8) );
                }
                printvar("decrypted block", decrypted +(blocknum*8), 8);
                bytes_read = fread(enc_dump, 1, 8, f);
@@ -546,125 +575,1001 @@ int CmdHFiClassDecrypt(const char *Cmd)
        fclose(f);
 
        saveFile(outfilename,"bin", decrypted, blocknum*8);
-
+       free(decrypted);
        return 0;
 }
 
-int CmdHFiClass_iso14443A_write(const char *Cmd)
-{
-       uint8_t readerType = 0;
-       uint8_t MAC[4]={0x00,0x00,0x00,0x00};
-       uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
-       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};
-       uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 
-       uint8_t blockNo=0;
-       uint8_t bldata[8]={0};
+static void usage_hf_iclass_encrypt(void) {
+       PrintAndLog("Usage: hf iclass encrypt <BlockData>");
+       PrintAndLog("");
+       PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
+       PrintAndLog("in the working directory. The file should be 16 bytes binary data");
+       PrintAndLog("");
+       PrintAndLog("example: hf iclass encrypt 0102030405060708");
+       PrintAndLog("");
+}
 
-       if (strlen(Cmd)<3)
-       {
-               PrintAndLog("Usage:  hf iclass write <Key> <Block> <Data>");
-               PrintAndLog("        sample: hf iclass write 0011223344556677 10 AAAAAAAAAAAAAAAA");
-               return 0;
-       }
 
-       if (param_gethex(Cmd, 0, KEY, 16))
+static int iClassEncryptBlkData(uint8_t *blkData) {
+       uint8_t key[16] = { 0 };
+       if(readKeyfile("iclass_decryptionkey.bin", 16, key))
        {
-               PrintAndLog("KEY must include 16 HEX symbols");
+               usage_hf_iclass_encrypt();
                return 1;
        }
+       PrintAndLog("Decryption file found... ");
 
-       blockNo = param_get8(Cmd, 1);
-       if (blockNo>32)
-       {
-               PrintAndLog("Error: Maximum number of blocks is 32 for iClass 2K Cards!");
-               return 1;
+       uint8_t encryptedData[16];
+       uint8_t *encrypted = encryptedData;
+       mbedtls_des3_context ctx = { {0} };
+       mbedtls_des3_set2key_enc( &ctx, key);
+
+       mbedtls_des3_crypt_ecb(&ctx, blkData,encrypted);
+       //printvar("decrypted block", decrypted, 8);
+       memcpy(blkData,encrypted,8);
+
+       return 1;
+}
+
+
+static int CmdHFiClassEncryptBlk(const char *Cmd) {
+       uint8_t blkData[8] = {0};
+       char opt = param_getchar(Cmd, 0);
+       if (strlen(Cmd)<1 || opt == 'h') {
+               usage_hf_iclass_encrypt();
+               return 0;
        }
-       if (param_gethex(Cmd, 2, bldata, 8))
-       {
-               PrintAndLog("Block data must include 8 HEX symbols");
-               return 1;
+       //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;
+}
 
-       UsbCommand c = {CMD_ICLASS_ISO14443A_WRITE, {0}};
-       SendCommand(&c);
-       UsbCommand resp;
 
-       if (WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
-               uint8_t isOK    = resp.arg[0] & 0xff;
-               uint8_t * data  = resp.d.asBytes;
+static 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]);
+}
+
 
-               memcpy(CSN,data,8);
-               memcpy(CCNR,data+8,8);
-               PrintAndLog("DEBUG: %s",sprint_hex(CSN,8));
-               PrintAndLog("DEBUG: %s",sprint_hex(CCNR,8));
-               PrintAndLog("isOk:%02x", isOK);
-       } else {
+static bool iClass_select(uint8_t *CSN, bool verbose, bool cleartrace, bool init) {
+
+       UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_CSN}};
+       if (init) c.arg[0] |= FLAG_ICLASS_READER_INIT;
+       if (cleartrace) c.arg[0] |= FLAG_ICLASS_READER_CLEARTRACE;
+
+       UsbCommand resp;
+       clearCommandBuffer();
+       SendCommand(&c);
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
                PrintAndLog("Command execute timeout");
+               return false;
        }
 
-       diversifyKey(CSN,KEY, div_key);
+       uint8_t isOK = resp.arg[0] & 0xff;
+       uint8_t *data = resp.d.asBytes;
 
-       PrintAndLog("Div Key: %s",sprint_hex(div_key,8));
-       doMAC(CCNR, div_key, MAC);
+       if (isOK & FLAG_ICLASS_READER_CSN) {
+               memcpy(CSN, data, 8);
+               if (verbose) PrintAndLog("CSN: %s", sprint_hex(CSN, 8));
+       } else {
+               PrintAndLog("Failed to select card! Aborting");
+               return false;
+       }
+       return true;
+}
 
-       UsbCommand c2 = {CMD_ICLASS_ISO14443A_WRITE, {readerType,blockNo}};
-       memcpy(c2.d.asBytes, bldata, 8);
-       memcpy(c2.d.asBytes+8, MAC, 4);
-       SendCommand(&c2);
 
-       if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
-               uint8_t isOK    = resp.arg[0] & 0xff;
-               uint8_t * data  = resp.d.asBytes;
+static void HFiClassCalcDivKey(uint8_t *CSN, uint8_t *KEY, uint8_t *div_key, bool elite){
+       uint8_t keytable[128] = {0};
+       uint8_t key_index[8] = {0};
+       if (elite) {
+               uint8_t key_sel[8] = { 0 };
+               uint8_t key_sel_p[8] = { 0 };
+               hash2(KEY, keytable);
+               hash1(CSN, key_index);
+               for(uint8_t i = 0; i < 8 ; i++)
+                       key_sel[i] = keytable[key_index[i]] & 0xFF;
 
-               if (isOK)
-                       PrintAndLog("isOk:%02x data:%s", isOK, sprint_hex(data, 4));
-               else
-                       PrintAndLog("isOk:%02x", isOK);
+               //Permute from iclass format to standard format
+               permutekey_rev(key_sel, key_sel_p);
+               diversifyKey(CSN, key_sel_p, div_key);
        } else {
-               PrintAndLog("Command execute timeout");
+               diversifyKey(CSN, KEY, div_key);
        }
-       return 0;
 }
-int CmdHFiClass_loclass(const char *Cmd)
-{
-       char opt = param_getchar(Cmd, 0);
 
-       if (strlen(Cmd)<1 || opt == 'h') {
-               PrintAndLog("Usage: hf iclass loclass [options]");
-               PrintAndLog("Options:");
-               PrintAndLog("h             Show this help");
-               PrintAndLog("t             Perform self-test");
-               PrintAndLog("f <filename>  Bruteforce iclass dumpfile");
-               PrintAndLog("                   An iclass dumpfile is assumed to consist of an arbitrary number of");
-               PrintAndLog("                   malicious CSNs, and their protocol responses");
-               PrintAndLog("                   The the binary format of the file is expected to be as follows: ");
-               PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
-               PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
-               PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
-               PrintAndLog("                  ... totalling N*24 bytes");
-               return 0;
-       }
-       char fileName[255] = {0};
-       if(opt == 'f')
-       {
-               if(param_getstr(Cmd, 1, fileName) > 0)
-               {
-                       return bruteforceFileNoKeys(fileName);
-               }else
-               {
-                       PrintAndLog("You must specify a filename");
-               }
+
+static bool iClass_authenticate(uint8_t *CSN, uint8_t *KEY, uint8_t *MAC, uint8_t *div_key, bool use_credit_key, bool elite, bool rawkey, bool replay, bool verbose) {
+
+       //get div_key
+       if (rawkey || replay)
+               memcpy(div_key, KEY, 8);
+       else
+               HFiClassCalcDivKey(CSN, KEY, div_key, elite);
+
+       char keytypetext[23] = "legacy diversified key";
+       if (rawkey) {
+               strcpy(keytypetext, "raw key");
+       } else if (replay) {
+               strcpy(keytypetext, "replayed NR/MAC");
+       } else if (elite) {
+               strcpy(keytypetext, "Elite diversified key");
        }
-       else if(opt == 't')
-       {
-               int errors = testCipherUtils();
-               errors += testMAC();
+       
+       if (verbose) PrintAndLog("Authenticating with %s: %s", keytypetext, sprint_hex(div_key, 8));
+
+       UsbCommand resp;
+       UsbCommand d = {CMD_ICLASS_READCHECK, {2, use_credit_key, 0}};
+
+       clearCommandBuffer();
+       SendCommand(&d);
+
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+               if (verbose) PrintAndLog("Auth Command (READCHECK[2]) execute timeout");
+               return false;
+       }
+       bool isOK = resp.arg[0];
+       if (!isOK) {
+               if (verbose) PrintAndLog("Couldn't get Card Challenge");
+               return false;
+       }
+
+       if (replay) {
+               memcpy(MAC, KEY+4, 4);
+       } else {
+               uint8_t CCNR[12];
+               memcpy(CCNR, resp.d.asBytes, 8);
+               memset(CCNR+8, 0x00, 4); // default NR = {0, 0, 0, 0}
+               doMAC(CCNR, div_key, MAC);
+       }
+
+       d.cmd = CMD_ICLASS_CHECK;
+       if (replay) {
+               memcpy(d.d.asBytes, KEY, 8);
+       } else {
+               memset(d.d.asBytes, 0x00, 4); // default NR = {0, 0, 0, 0}
+               memcpy(d.d.asBytes+4, MAC, 4);
+       }
+       clearCommandBuffer();
+       SendCommand(&d);
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+               if (verbose) PrintAndLog("Auth Command (CHECK) execute timeout");
+               return false;
+       }
+       isOK = resp.arg[0];
+       if (!isOK) {
+               if (verbose) PrintAndLog("Authentication error");
+               return false;
+       }
+       return true;
+}
+
+
+static void usage_hf_iclass_dump(void) {
+       PrintAndLog("Usage:  hf iclass dump f <fileName> k <Key> c <CreditKey> e|r|n\n");
+       PrintAndLog("Options:");
+       PrintAndLog("  f <filename> : specify a filename to save dump to");
+       PrintAndLog("  k <Key>      : *Debit Key (AA1) as 16 hex symbols (8 bytes) or 1 hex to select key from memory");
+       PrintAndLog("  c <CreditKey>: Credit Key (AA2) as 16 hex symbols (8 bytes) or 1 hex to select key from memory");
+       PrintAndLog("  e            : If 'e' is specified, the keys are interpreted as Elite");
+       PrintAndLog("                 Custom Keys (KCus), which can be obtained via reader-attack");
+       PrintAndLog("                 See 'hf iclass sim 2'. This key should be on iclass-format");
+       PrintAndLog("  r            : If 'r' is specified, keys are interpreted as raw blocks 3/4");
+       PrintAndLog("  n            : If 'n' is specified, keys are interpreted as NR/MAC pairs which can be obtained by 'hf iclass snoop'");
+       PrintAndLog("  NOTE: * = required");
+       PrintAndLog("Samples:");
+       PrintAndLog("  hf iclass dump k 001122334455667B");
+       PrintAndLog("  hf iclass dump k AAAAAAAAAAAAAAAA c 001122334455667B");
+       PrintAndLog("  hf iclass dump k AAAAAAAAAAAAAAAA e");
+}
+
+
+static void printIclassDumpContents(uint8_t *iclass_dump, uint8_t startblock, uint8_t endblock, size_t filesize) {
+       uint8_t mem_config;
+       memcpy(&mem_config, iclass_dump + 13,1);
+       uint8_t maxmemcount;
+       uint8_t filemaxblock = filesize / 8;
+       if (mem_config & 0x80)
+               maxmemcount = 255;
+       else
+               maxmemcount = 31;
+       //PrintAndLog   ("endblock: %d, filesize: %d, maxmemcount: %d, filemaxblock: %d", endblock,filesize, maxmemcount, filemaxblock);
+
+       if (startblock == 0)
+               startblock = 6;
+       if ((endblock > maxmemcount) || (endblock == 0))
+               endblock = maxmemcount;
+
+       // remember endblock need to relate to zero-index arrays.
+       if (endblock > filemaxblock-1)
+               endblock = filemaxblock;
+
+       int i = startblock;
+       printf("------+--+-------------------------+\n");
+       while (i <= endblock) {
+               uint8_t *blk = iclass_dump + (i * 8);
+               printf("Block |%02X| %s|\n", i, sprint_hex(blk, 8) );
+               i++;
+       }
+       printf("------+--+-------------------------+\n");
+}
+
+
+static 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 AA1_maxBlk = 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 NRMAC_replay = false;
+       bool errors = false;
+       bool verbose = false;
+       uint8_t cmdp = 0;
+
+       while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
+               switch(param_getchar(Cmd, cmdp)) {
+                       case 'h':
+                       case 'H':
+                               usage_hf_iclass_dump();
+                               return 0;
+                       case 'c':
+                       case 'C':
+                               have_credit_key = true;
+                               dataLen = param_getstr(Cmd, cmdp+1, tempStr, sizeof(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, sizeof(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, sizeof(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;
+                       case 'n':
+                       case 'N':
+                               NRMAC_replay = true;
+                               cmdp++;
+                               break;
+                       case 'v':
+                       case 'V':
+                               verbose = true;
+                               cmdp++;
+                               break;
+                       default:
+                               PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+                               errors = true;
+                               break;
+               }
+       }
+
+       if (elite + rawkey + NRMAC_replay > 1) {
+               PrintAndLog("You cannot combine the 'e', 'r', and 'n' options\n");
+               errors = true;
+       }
+       
+       if (errors || cmdp < 2) {
+               usage_hf_iclass_dump();
+               return 0;
+       }
+
+       // if only credit key is given: try for AA1 as well (not for iclass but for some picopass this will work)
+       if (!have_debit_key && have_credit_key) {
+               use_credit_key = true;
+               memcpy(KEY, CreditKEY, 8);
+       }
+
+       // clear trace and get first 3 blocks
+       UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_INIT | FLAG_ICLASS_READER_CLEARTRACE | FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_CC}};
+       UsbCommand resp;
+       uint8_t tag_data[256*8];
+
+       clearCommandBuffer();
+       SendCommand(&c);
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+               PrintAndLog("Command execute timeout");
+               DropField();
+               return 0;
+       }
+
+       uint8_t readStatus = resp.arg[0] & 0xff;
+       uint8_t *data = resp.d.asBytes;
+       uint8_t status_mask = FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_CC;
+
+       if (readStatus != status_mask) {
+               PrintAndLog("No tag found ...");
+               return 0;
+       } else {
+               memcpy(tag_data, data, 8*3);
+               if (verbose) PrintAndLog("CSN: %s", sprint_hex(tag_data, 8));
+               AA1_maxBlk = data[8];
+               getMemConfig(data[13], data[12], &maxBlk, &app_areas, &kb);
+               // large memory - not able to dump pages currently
+               if (AA1_maxBlk > maxBlk) AA1_maxBlk = maxBlk;
+       }
+
+       // authenticate with debit key (or credit key if we have no debit key) and get div_key - later store in dump block 3
+       if (!iClass_authenticate(tag_data, KEY, MAC, div_key, use_credit_key, elite, rawkey, NRMAC_replay, verbose)){
+               DropField();
+               return 0;
+       }
+
+       // read AA1
+       UsbCommand w = {CMD_ICLASS_DUMP};
+       uint32_t blocksRead = 0;
+       for (blockno = 3; blockno <= AA1_maxBlk; blockno += blocksRead) {
+               w.arg[0] = blockno;
+               w.arg[1] = AA1_maxBlk - blockno + 1;
+               clearCommandBuffer();
+               SendCommand(&w);
+               if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+                       PrintAndLog("Command execute time-out 1");
+                       DropField();
+                       return 1;
+               }
+               blocksRead = resp.arg[1];
+               bool isOK = resp.arg[0];
+               if (!isOK) {
+                       PrintAndLog("Reading AA1 block failed");
+                       DropField();
+                       return 0;
+               }
+               memcpy(tag_data + blockno*8, resp.d.asBytes, blocksRead*8);
+       }
+
+       // do we still need to read more blocks (AA2 enabled)?
+       if (have_credit_key && maxBlk > AA1_maxBlk) {
+               if (!use_credit_key) {
+                       //turn off hf field before authenticating with different key
+                       DropField();
+                       // AA2 authenticate credit key and git c_div_key - later store in dump block 4
+                       uint8_t CSN[8];
+                       if (!iClass_select(CSN, verbose, false, true) || !iClass_authenticate(CSN, CreditKEY, MAC, c_div_key, true, false, false, NRMAC_replay, verbose)){
+                               DropField();
+                               return 0;
+                       }
+               }
+               for ( ; blockno <= maxBlk; blockno += blocksRead) {
+                       w.arg[0] = blockno;
+                       w.arg[1] = maxBlk - blockno + 1;
+                       clearCommandBuffer();
+                       SendCommand(&w);
+                       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+                               PrintAndLog("Command execute time-out 1");
+                               DropField();
+                               return 1;
+                       }
+                       blocksRead = resp.arg[1];
+                       bool isOK = resp.arg[0];
+                       if (!isOK) {
+                               PrintAndLog("Reading AA2 block failed");
+                               DropField();
+                               return 0;
+                       }
+                       memcpy(tag_data + blockno*8, resp.d.asBytes, blocksRead*8);
+               }
+       }
+
+       DropField();
+
+       // add diversified keys to dump
+       if (have_debit_key) {
+               memcpy(tag_data + 3*8, div_key, 8);
+       } else {
+               memset(tag_data + 3*8, 0xff, 8);
+       }
+       if (have_credit_key) {
+               memcpy(tag_data + 4*8, c_div_key, 8);
+       } else {
+               memset(tag_data + 4*8, 0xff, 8);
+       }
+
+       // print the dump
+       printf("------+--+-------------------------+\n");
+       printf("CSN   |00| %s|\n",sprint_hex(tag_data, 8));
+       printIclassDumpContents(tag_data, 1, blockno-1, blockno*8);
+
+       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", blockno);
+       saveFile(filename, "bin", tag_data, blockno*8);
+       return 1;
+}
+
+
+static int WriteBlock(uint8_t blockno, uint8_t *bldata, uint8_t *KEY, bool use_credit_key, bool elite, bool rawkey, bool NRMAC_replay, bool verbose) {
+
+       uint8_t MAC[4] = {0x00,0x00,0x00,0x00};
+       uint8_t div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t CSN[8];
+
+       if (!iClass_select(CSN, verbose, true, true) || !iClass_authenticate(CSN, KEY, MAC, div_key, use_credit_key, elite, rawkey, NRMAC_replay, verbose)) {
+               DropField();
+               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");
+               DropField();
+               return 0;
+       }
+       bool isOK = resp.arg[0];
+       if (!isOK) {
+               PrintAndLog("Write Block Failed");
+               DropField();
+               return 0;
+       }
+
+       PrintAndLog("Write Block Successful");
+       return 1;
+}
+
+
+static void usage_hf_iclass_writeblock(void) {
+       PrintAndLog("Options:");
+       PrintAndLog("  b <Block> : The block number as 2 hex symbols");
+       PrintAndLog("  d <data>  : Set the Data to write as 16 hex symbols");
+       PrintAndLog("  k <Key>   : Access Key as 16 hex symbols or 1 hex to select key from memory");
+       PrintAndLog("  c         : If 'c' is specified, the key set is assumed to be the credit key\n");
+       PrintAndLog("  e         : If 'e' is specified, elite computations applied to key");
+       PrintAndLog("  r         : If 'r' is specified, no computations applied to key");
+       PrintAndLog("Samples:");
+       PrintAndLog("  hf iclass writeblk b 0A d AAAAAAAAAAAAAAAA k 001122334455667B");
+       PrintAndLog("  hf iclass writeblk b 1B d AAAAAAAAAAAAAAAA k 001122334455667B c");
+       PrintAndLog("  hf iclass writeblk b 0A d AAAAAAAAAAAAAAAA n 0");
+}
+
+
+static 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 && !errors)     {
+               switch(param_getchar(Cmd, cmdp)) {
+               case 'h':
+               case 'H':
+                       usage_hf_iclass_writeblock();
+                       return 0;
+               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("Data 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, sizeof(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) {
+                       usage_hf_iclass_writeblock();
+                       return 0;
+               }
+       }
+
+       if (elite && rawkey) {
+               PrintAndLog("You cannot combine the 'e' and 'r' options\n");
+               errors = true;
+       }
+               
+       if (cmdp < 6) {
+               usage_hf_iclass_writeblock();
+               return 0;
+       }
+       int ans = WriteBlock(blockno, bldata, KEY, use_credit_key, elite, rawkey, false, true);
+       DropField();
+       return ans;
+}
+
+
+static void usage_hf_iclass_clone(void) {
+       PrintAndLog("Usage:  hf iclass clone f <tagfile.bin> b <first block> l <last block> k <KEY> c e|r");
+       PrintAndLog("Options:");
+       PrintAndLog("  f <filename>: specify a filename to clone from");
+       PrintAndLog("  b <Block>   : The first block to clone as 2 hex symbols");
+       PrintAndLog("  l <Last Blk>: Set the Data to write as 16 hex symbols");
+       PrintAndLog("  k <Key>     : Access Key as 16 hex symbols or 1 hex to select key from memory");
+       PrintAndLog("  c           : If 'c' is specified, the key set is assumed to be the credit key\n");
+       PrintAndLog("  e           : If 'e' is specified, elite computations applied to key");
+       PrintAndLog("  r           : If 'r' is specified, no computations applied to key");
+       PrintAndLog("Samples:");
+       PrintAndLog("  hf iclass clone f iclass_tagdump-121345.bin b 06 l 1A k 1122334455667788 e");
+       PrintAndLog("  hf iclass clone f iclass_tagdump-121345.bin b 05 l 19 k 0");
+       PrintAndLog("  hf iclass clone f iclass_tagdump-121345.bin b 06 l 19 k 0 e");
+}
+
+
+static int CmdHFiClassCloneTag(const char *Cmd) {
+       char filename[FILE_PATH_SIZE] = {0};
+       char tempStr[50]={0};
+       uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t keyNbr = 0;
+       uint8_t fileNameLen = 0;
+       uint8_t startblock = 0;
+       uint8_t endblock = 0;
+       uint8_t dataLen = 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 && !errors) {
+               switch(param_getchar(Cmd, cmdp)) {
+               case 'h':
+               case 'H':
+                       usage_hf_iclass_clone();
+                       return 0;
+               case 'b':
+               case 'B':
+                       if (param_gethex(Cmd, cmdp+1, &startblock, 2)) {
+                               PrintAndLog("Start Block No must include 2 HEX symbols\n");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'c':
+               case 'C':
+                       use_credit_key = true;
+                       cmdp++;
+                       break;
+               case 'e':
+               case 'E':
+                       elite = true;
+                       cmdp++;
+                       break;
+               case 'f':
+               case 'F':
+                       fileNameLen = param_getstr(Cmd, cmdp+1, filename, sizeof(filename));
+                       if (fileNameLen < 1) {
+                               PrintAndLog("No filename found after f");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'k':
+               case 'K':
+                       dataLen = param_getstr(Cmd, cmdp+1, tempStr, sizeof(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 'l':
+               case 'L':
+                       if (param_gethex(Cmd, cmdp+1, &endblock, 2)) {
+                               PrintAndLog("Start Block No must include 2 HEX symbols\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) {
+                       usage_hf_iclass_clone();
+                       return 0;
+               }
+       }
+
+       if (cmdp < 8) {
+               usage_hf_iclass_clone();
+               return 0;
+       }
+
+       FILE *f;
+
+       iclass_block_t tag_data[USB_CMD_DATA_SIZE/12];
+
+       if ((endblock-startblock+1)*12 > USB_CMD_DATA_SIZE) {
+               PrintAndLog("Trying to write too many blocks at once.  Max: %d", USB_CMD_DATA_SIZE/8);
+       }
+       // file handling and reading
+       f = fopen(filename,"rb");
+       if (!f) {
+               PrintAndLog("Failed to read from file '%s'", filename);
+               return 1;
+       }
+
+       if (startblock<5) {
+               PrintAndLog("You cannot write key blocks this way. yet... make your start block > 4");
+               fclose(f);
+               return 0;
+       }
+       // now read data from the file from block 6 --- 19
+       // ok we will use this struct [data 8 bytes][MAC 4 bytes] for each block calculate all mac number for each data
+       // then copy to usbcommand->asbytes; the max is 32 - 6 = 24 block 12 bytes each block 288 bytes then we can only accept to clone 21 blocks at the time,
+       // else we have to create a share memory
+       int i;
+       fseek(f, startblock*8, SEEK_SET);
+       if (fread(tag_data, sizeof(iclass_block_t), endblock - startblock + 1, f) == 0 ) {
+               PrintAndLog("File reading error.");
+               fclose(f);
+               return 2;
+       }
+
+       uint8_t MAC[4]={0x00,0x00,0x00,0x00};
+       uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t CSN[8];
+
+       if (!iClass_select(CSN, true, false, false) || !iClass_authenticate(CSN, KEY, MAC, div_key, use_credit_key, elite, rawkey, false, true)) {
+               DropField();
+               return 0;
+       }
+
+       UsbCommand w = {CMD_ICLASS_CLONE, {startblock, endblock}};
+       uint8_t *ptr;
+       // calculate all mac for every the block we will write
+       for (i = startblock; i <= endblock; i++){
+               Calc_wb_mac(i, tag_data[i - startblock].d, div_key, MAC);
+               // usb command d start pointer = d + (i - 6) * 12
+               // memcpy(pointer,tag_data[i - 6],8) 8 bytes
+               // memcpy(pointer + 8,mac,sizoof(mac) 4 bytes;
+               // next one
+               ptr = w.d.asBytes + (i - startblock) * 12;
+               memcpy(ptr, &(tag_data[i - startblock].d[0]), 8);
+               memcpy(ptr + 8,MAC, 4);
+       }
+       uint8_t p[12];
+       for (i = 0; i <= endblock - startblock;i++){
+               memcpy(p,w.d.asBytes + (i * 12),12);
+               printf("Block |%02x|",i + startblock);
+               printf(" %02x%02x%02x%02x%02x%02x%02x%02x |",p[0],p[1],p[2],p[3],p[4],p[5],p[6],p[7]);
+               printf(" MAC |%02x%02x%02x%02x|\n",p[8],p[9],p[10],p[11]);
+       }
+
+       UsbCommand resp;
+       SendCommand(&w);
+       if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
+       {
+               PrintAndLog("Command execute timeout");
+               DropField();
+               return 0;
+       }
+       return 1;
+}
+
+
+static int ReadBlock(uint8_t *KEY, uint8_t blockno, uint8_t keyType, bool elite, bool rawkey, bool NRMAC_replay, bool verbose, bool auth) {
+
+       uint8_t MAC[4]={0x00,0x00,0x00,0x00};
+       uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t CSN[8];
+
+       if (!iClass_select(CSN, verbose, true, true)) {
+               DropField();
+               return 0;
+       }
+
+       if (auth) {
+               if (!iClass_authenticate(CSN, KEY, MAC, div_key, (keyType==0x18), elite, rawkey, NRMAC_replay, verbose)) {
+                       DropField();
+                       return 0;
+               }
+       }
+
+       UsbCommand resp;
+       UsbCommand w = {CMD_ICLASS_READBLOCK, {blockno}};
+       clearCommandBuffer();
+       SendCommand(&w);
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+               PrintAndLog("Command execute timeout");
+               DropField();
+               return 0;
+       }
+       bool isOK = resp.arg[0];
+       if (!isOK) {
+               PrintAndLog("Read Block Failed");
+               DropField();
+               return 0;
+       }
+       //data read is stored in: resp.d.asBytes[0-15]
+       if (verbose)
+               PrintAndLog("Block %02X: %s\n",blockno, sprint_hex(resp.d.asBytes,8));
+
+       return 1;
+}
+
+
+static void usage_hf_iclass_readblock(void) {
+       PrintAndLog("Usage:  hf iclass readblk b <Block> k <Key> [c] [e|r|n]\n");
+       PrintAndLog("Options:");
+       PrintAndLog("  b <Block> : The block number as 2 hex symbols");
+       PrintAndLog("  k <Key>   : Access Key as 16 hex symbols or 1 hex to select key from memory");
+       PrintAndLog("  c         : If 'c' is specified, the key set is assumed to be the credit key\n");
+       PrintAndLog("  e         : If 'e' is specified, elite computations applied to key");
+       PrintAndLog("  r         : If 'r' is specified, no computations applied to key");
+       PrintAndLog("  n         : If 'n' is specified, <Key> specifies a NR/MAC pair which can be obtained by 'hf iclass snoop'");
+       PrintAndLog("Samples:");
+       PrintAndLog("  hf iclass readblk b 06 k 0011223344556677");
+       PrintAndLog("  hf iclass readblk b 1B k 0011223344556677 c");
+       PrintAndLog("  hf iclass readblk b 0A k 0");
+}
+
+
+static int CmdHFiClass_ReadBlock(const char *Cmd) {
+       uint8_t blockno=0;
+       uint8_t keyType = 0x88; //debit key
+       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 elite = false;
+       bool rawkey = false;
+       bool NRMAC_replay = false;
+       bool errors = false;
+       bool auth = false;
+       uint8_t cmdp = 0;
+
+       while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
+               switch (param_getchar(Cmd, cmdp)) {
+                       case 'h':
+                       case 'H':
+                               usage_hf_iclass_readblock();
+                               return 0;
+                       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':
+                               keyType = 0x18;
+                               cmdp++;
+                               break;
+                       case 'e':
+                       case 'E':
+                               elite = true;
+                               cmdp++;
+                               break;
+                       case 'k':
+                       case 'K':
+                               auth = true;
+                               dataLen = param_getstr(Cmd, cmdp+1, tempStr, sizeof(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: KeyNbr is invalid\n");
+                                               errors = true;
+                                       }
+                               } else {
+                                       PrintAndLog("\nERROR: Key is incorrect length\n");
+                                       errors = true;
+                               }
+                               cmdp += 2;
+                               break;
+                       case 'r':
+                       case 'R':
+                               rawkey = true;
+                               cmdp++;
+                               break;
+                       case 'n':
+                       case 'N':
+                               NRMAC_replay = true;
+                               cmdp++;
+                               break;
+                       default:
+                               PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+                               errors = true;
+                               break;
+               }
+       }
+       
+       if (elite + rawkey + NRMAC_replay > 1) {
+               PrintAndLog("You cannot combine the 'e', 'r', and 'n' options\n");
+               errors = true;
+       }
+
+       if (errors) {
+               usage_hf_iclass_readblock();
+               return 0;
+       }
+
+       if (cmdp < 2) {
+               usage_hf_iclass_readblock();
+               return 0;
+       }
+       if (!auth)
+               PrintAndLog("warning: no authentication used with read, only a few specific blocks can be read accurately without authentication.");
+
+       return ReadBlock(KEY, blockno, keyType, elite, rawkey, NRMAC_replay, true, auth);
+}
+
+
+static int CmdHFiClass_loclass(const char *Cmd) {
+       char opt = param_getchar(Cmd, 0);
+
+       if (strlen(Cmd)<1 || opt == 'h') {
+               PrintAndLog("Usage: hf iclass loclass [options]");
+               PrintAndLog("Options:");
+               PrintAndLog("h             Show this help");
+               PrintAndLog("t             Perform self-test");
+               PrintAndLog("f <filename>  Bruteforce iclass dumpfile");
+               PrintAndLog("                   An iclass dumpfile is assumed to consist of an arbitrary number of");
+               PrintAndLog("                   malicious CSNs, and their protocol responses");
+               PrintAndLog("                   The binary format of the file is expected to be as follows: ");
+               PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
+               PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
+               PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
+               PrintAndLog("                  ... totalling N*24 bytes");
+               return 0;
+       }
+       char fileName[255] = {0};
+       if(opt == 'f') {
+               if(param_getstr(Cmd, 1, fileName, sizeof(fileName)) > 0) {
+                       return bruteforceFileNoKeys(fileName);
+               } else {
+                       PrintAndLog("You must specify a filename");
+               }
+       } else if(opt == 't') {
+               int errors = testCipherUtils();
+               errors += testMAC();
                errors += doKeyTests(0);
                errors += testElite();
-               if(errors)
-               {
+               if(errors) {
                        prnlog("OBS! There were errors!!!");
                }
                return errors;
@@ -673,30 +1578,649 @@ int CmdHFiClass_loclass(const char *Cmd)
        return 0;
 }
 
-static command_t CommandTable[] = 
-{
-       {"help",        CmdHelp,                        1,      "This help"},
-       {"list",        CmdHFiClassList,        0,      "[Deprecated] List iClass history"},
-       {"snoop",       CmdHFiClassSnoop,       0,      "Eavesdrop iClass communication"},
-       {"sim", CmdHFiClassSim,         0,      "Simulate iClass tag"},
-       {"reader",CmdHFiClassReader,    0,      "Read an iClass tag"},
-       {"replay",CmdHFiClassReader_Replay,     0,      "Read an iClass tag via Reply Attack"},
-       {"dump",        CmdHFiClassReader_Dump, 0,              "Authenticate and Dump iClass tag"},
-//     {"write",       CmdHFiClass_iso14443A_write,    0,      "Authenticate and Write iClass block"},
-       {"loclass",     CmdHFiClass_loclass,    1,      "Use loclass to perform bruteforce of reader attack dump"},
-       {"eload",   CmdHFiClassELoad,    0,     "[experimental] Load data into iclass emulator memory"},
-       {"decrypt", CmdHFiClassDecrypt,  1,     "Decrypt tagdump" },
+
+static void usage_hf_iclass_readtagfile() {
+       PrintAndLog("Usage: hf iclass readtagfile <filename> [startblock] [endblock]");
+}
+
+
+static int CmdHFiClassReadTagFile(const char *Cmd) {
+       int startblock = 0;
+       int endblock = 0;
+       char tempnum[5];
+       FILE *f;
+       char filename[FILE_PATH_SIZE];
+       if (param_getstr(Cmd, 0, filename, sizeof(filename)) < 1) {
+               usage_hf_iclass_readtagfile();
+               return 0;
+       }
+       if (param_getstr(Cmd, 1, tempnum, sizeof(tempnum)) < 1)
+               startblock = 0;
+       else
+               sscanf(tempnum,"%d",&startblock);
+
+       if (param_getstr(Cmd,2, tempnum, sizeof(tempnum)) < 1)
+               endblock = 0;
+       else
+               sscanf(tempnum,"%d",&endblock);
+       // file handling and reading
+       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);
+
+       if ( fsize < 0 ) {
+               PrintAndLog("Error, when getting filesize");
+               fclose(f);
+               return 1;
+       }
+
+       uint8_t *dump = malloc(fsize);
+
+       size_t bytes_read = fread(dump, 1, fsize, f);
+       fclose(f);
+       uint8_t *csn = dump;
+       printf("------+--+-------------------------+\n");
+       printf("CSN   |00| %s|\n", sprint_hex(csn, 8) );
+       //    printIclassDumpInfo(dump);
+       printIclassDumpContents(dump,startblock,endblock,bytes_read);
+       free(dump);
+       return 0;
+}
+
+/*
+uint64_t xorcheck(uint64_t sdiv,uint64_t hdiv) {
+       uint64_t new_div = 0x00;
+       new_div ^= sdiv;
+       new_div ^= hdiv;
+       return new_div;
+}
+
+uint64_t hexarray_to_uint64(uint8_t *key) {
+       char temp[17];
+       uint64_t uint_key;
+       for (int i = 0;i < 8;i++)
+               sprintf(&temp[(i *2)],"%02X",key[i]);
+       temp[16] = '\0';
+       if (sscanf(temp,"%016" SCNx64,&uint_key) < 1)
+               return 0;
+       return uint_key;
+}
+*/
+
+
+//when told CSN, oldkey, newkey, if new key is elite (elite), and if old key was elite (oldElite)
+//calculate and return xor_div_key (ready for a key write command)
+//print all div_keys if verbose
+static void HFiClassCalcNewKey(uint8_t *CSN, uint8_t *OLDKEY, uint8_t *NEWKEY, uint8_t *xor_div_key, bool elite, bool oldElite, bool verbose){
+       uint8_t old_div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t new_div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       //get old div key
+       HFiClassCalcDivKey(CSN, OLDKEY, old_div_key, oldElite);
+       //get new div key
+       HFiClassCalcDivKey(CSN, NEWKEY, new_div_key, elite);
+
+       for (uint8_t i = 0; i < sizeof(old_div_key); i++){
+               xor_div_key[i] = old_div_key[i] ^ new_div_key[i];
+       }
+       if (verbose) {
+               printf("Old Div Key : %s\n",sprint_hex(old_div_key,8));
+               printf("New Div Key : %s\n",sprint_hex(new_div_key,8));
+               printf("Xor Div Key : %s\n",sprint_hex(xor_div_key,8));
+       }
+}
+
+
+static void usage_hf_iclass_calc_newkey(void) {
+       PrintAndLog("HELP :  Manage iClass Keys in client memory:\n");
+       PrintAndLog("Usage:  hf iclass calc_newkey o <Old key> n <New key> s [csn] e");
+       PrintAndLog("  Options:");
+       PrintAndLog("  o <oldkey> : *specify a key as 16 hex symbols or a key number as 1 symbol");
+       PrintAndLog("  n <newkey> : *specify a key as 16 hex symbols or a key number as 1 symbol");
+       PrintAndLog("  s <csn>    : specify a card Serial number to diversify the key (if omitted will attempt to read a csn)");
+       PrintAndLog("  e          : specify new key as elite calc");
+       PrintAndLog("  ee         : specify old and new key as elite calc");
+       PrintAndLog("Samples:");
+       PrintAndLog(" e key to e key given csn : hf iclass calcnewkey o 1122334455667788 n 2233445566778899 s deadbeafdeadbeaf ee");
+       PrintAndLog(" std key to e key read csn: hf iclass calcnewkey o 1122334455667788 n 2233445566778899 e");
+       PrintAndLog(" std to std read csn      : hf iclass calcnewkey o 1122334455667788 n 2233445566778899");
+       PrintAndLog("NOTE: * = required\n");
+}
+
+
+static int CmdHFiClassCalcNewKey(const char *Cmd) {
+       uint8_t OLDKEY[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t NEWKEY[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t xor_div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t CSN[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t keyNbr = 0;
+       uint8_t dataLen = 0;
+       char tempStr[50] = {0};
+       bool givenCSN = false;
+       bool oldElite = false;
+       bool elite = false;
+       bool errors = false;
+       uint8_t cmdp = 0;
+       
+       while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
+               switch(param_getchar(Cmd, cmdp)) {
+               case 'h':
+               case 'H':
+                       usage_hf_iclass_calc_newkey();
+                       return 0;
+               case 'e':
+               case 'E':
+                       dataLen = param_getstr(Cmd, cmdp, tempStr, sizeof(tempStr));
+                       if (dataLen==2)
+                               oldElite = true;
+                       elite = true;
+                       cmdp++;
+                       break;
+               case 'n':
+               case 'N':
+                       dataLen = param_getstr(Cmd, cmdp+1, tempStr, sizeof(tempStr));
+                       if (dataLen == 16) {
+                               errors = param_gethex(tempStr, 0, NEWKEY, dataLen);
+                       } else if (dataLen == 1) {
+                               keyNbr = param_get8(Cmd, cmdp+1);
+                               if (keyNbr < ICLASS_KEYS_MAX) {
+                                       memcpy(NEWKEY, iClass_Key_Table[keyNbr], 8);
+                               } else {
+                                       PrintAndLog("\nERROR: NewKey Nbr is invalid\n");
+                                       errors = true;
+                               }
+                       } else {
+                               PrintAndLog("\nERROR: NewKey is incorrect length\n");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'o':
+               case 'O':
+                       dataLen = param_getstr(Cmd, cmdp+1, tempStr, sizeof(tempStr));
+                       if (dataLen == 16) {
+                               errors = param_gethex(tempStr, 0, OLDKEY, dataLen);
+                       } else if (dataLen == 1) {
+                               keyNbr = param_get8(Cmd, cmdp+1);
+                               if (keyNbr < ICLASS_KEYS_MAX) {
+                                       memcpy(OLDKEY, 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 's':
+               case 'S':
+                       givenCSN = true;
+                       if (param_gethex(Cmd, cmdp+1, CSN, 16)) {
+                               usage_hf_iclass_calc_newkey();
+                               return 0;
+                       }
+                       cmdp += 2;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if (errors) {
+                       usage_hf_iclass_calc_newkey();
+                       return 0;
+               }
+       }
+
+       if (cmdp < 4) {
+               usage_hf_iclass_calc_newkey();
+               return 0;
+       }
+
+       if (!givenCSN)
+               if (!iClass_select(CSN, true, true, true)) {
+                       DropField();
+                       return 0;
+               }
+       DropField();
+
+       HFiClassCalcNewKey(CSN, OLDKEY, NEWKEY, xor_div_key, elite, oldElite, true);
+       return 0;
+}
+
+
+static int loadKeys(char *filename) {
+       FILE *f;
+       f = fopen(filename,"rb");
+       if(!f) {
+               PrintAndLog("Failed to read from file '%s'", filename);
+               return 0;
+       }
+       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 1;
+       }
+
+       uint8_t *dump = malloc(fsize);
+
+       size_t bytes_read = fread(dump, 1, fsize, f);
+       fclose(f);
+       if (bytes_read > ICLASS_KEYS_MAX * 8){
+               PrintAndLog("File is too long to load - bytes: %u", bytes_read);
+               free(dump);
+               return 0;
+       }
+       uint8_t i = 0;
+       for (; i < bytes_read/8; i++){
+               memcpy(iClass_Key_Table[i],dump+(i*8),8);
+       }
+       free(dump);
+       PrintAndLog("%u keys loaded", i);
+       return 1;
+}
+
+
+static int saveKeys(char *filename) {
+       FILE *f;
+       f = fopen(filename,"wb");
+       if (f == NULL) {
+               printf("error opening file %s\n",filename);
+               return 0;
+       }
+       for (uint8_t i = 0; i < ICLASS_KEYS_MAX; i++){
+               if (fwrite(iClass_Key_Table[i],8,1,f) != 1){
+                       PrintAndLog("save key failed to write to file: %s", filename);
+                       break;
+               }
+       }
+       fclose(f);
+       return 0;
+}
+
+
+static int printKeys(void) {
+       PrintAndLog("");
+       for (uint8_t i = 0; i < ICLASS_KEYS_MAX; i++){
+               PrintAndLog("%u: %s",i,sprint_hex(iClass_Key_Table[i],8));
+       }
+       PrintAndLog("");
+       return 0;
+}
+
+
+static void usage_hf_iclass_managekeys(void) {
+       PrintAndLog("HELP :  Manage iClass Keys in client memory:\n");
+       PrintAndLog("Usage:  hf iclass managekeys n [keynbr] k [key] f [filename] s l p\n");
+       PrintAndLog("  Options:");
+       PrintAndLog("  n <keynbr>  : specify the keyNbr to set in memory");
+       PrintAndLog("  k <key>     : set a key in memory");
+       PrintAndLog("  f <filename>: specify a filename to use with load or save operations");
+       PrintAndLog("  s           : save keys in memory to file specified by filename");
+       PrintAndLog("  l           : load keys to memory from file specified by filename");
+       PrintAndLog("  p           : print keys loaded into memory\n");
+       PrintAndLog("Samples:");
+       PrintAndLog(" set key      : hf iclass managekeys n 0 k 1122334455667788");
+       PrintAndLog(" save key file: hf iclass managekeys f mykeys.bin s");
+       PrintAndLog(" load key file: hf iclass managekeys f mykeys.bin l");
+       PrintAndLog(" print keys   : hf iclass managekeys p\n");
+}
+
+
+static int CmdHFiClassManageKeys(const char *Cmd) {
+       uint8_t keyNbr = 0;
+       uint8_t dataLen = 0;
+       uint8_t KEY[8] = {0};
+       char filename[FILE_PATH_SIZE];
+       uint8_t fileNameLen = 0;
+       bool errors = false;
+       uint8_t operation = 0;
+       char tempStr[20];
+       uint8_t cmdp = 0;
+
+       while(param_getchar(Cmd, cmdp) != 0x00) {
+               switch(param_getchar(Cmd, cmdp)) {
+               case 'h':
+               case 'H':
+                       usage_hf_iclass_managekeys();
+                       return 0;
+               case 'f':
+               case 'F':
+                       fileNameLen = param_getstr(Cmd, cmdp+1, filename, sizeof(filename));
+                       if (fileNameLen < 1) {
+                               PrintAndLog("No filename found after f");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'n':
+               case 'N':
+                       keyNbr = param_get8(Cmd, cmdp+1);
+                       if (keyNbr >= ICLASS_KEYS_MAX) {
+                               PrintAndLog("Invalid block number");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'k':
+               case 'K':
+                       operation += 3; //set key
+                       dataLen = param_getstr(Cmd, cmdp+1, tempStr, sizeof(tempStr));
+                       if (dataLen == 16) { //ul-c or ev1/ntag key length
+                               errors = param_gethex(tempStr, 0, KEY, dataLen);
+                       } else {
+                               PrintAndLog("\nERROR: Key is incorrect length\n");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'p':
+               case 'P':
+                       operation += 4; //print keys in memory
+                       cmdp++;
+                       break;
+               case 'l':
+               case 'L':
+                       operation += 5; //load keys from file
+                       cmdp++;
+                       break;
+               case 's':
+               case 'S':
+                       operation += 6; //save keys to file
+                       cmdp++;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if (errors) {
+                       usage_hf_iclass_managekeys();
+                       return 0;
+               }
+       }
+
+       if (operation == 0){
+               PrintAndLog("no operation specified (load, save, or print)\n");
+               usage_hf_iclass_managekeys();
+               return 0;
+       }
+
+       if (operation > 6){
+               PrintAndLog("Too many operations specified\n");
+               usage_hf_iclass_managekeys();
+               return 0;
+       }
+       if (operation > 4 && fileNameLen == 0){
+               PrintAndLog("You must enter a filename when loading or saving\n");
+               usage_hf_iclass_managekeys();
+               return 0;
+       }
+
+       switch (operation){
+               case 3: memcpy(iClass_Key_Table[keyNbr], KEY, 8); return 1;
+               case 4: return printKeys();
+               case 5: return loadKeys(filename);
+               case 6: return saveKeys(filename);
+               break;
+       }
+       return 0;
+}
+
+
+static int CmdHFiClassCheckKeys(const char *Cmd) {
+
+       uint8_t mac[4] = {0x00,0x00,0x00,0x00};
+       uint8_t key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+
+       // elite key,  raw key, standard key
+       bool use_elite = false;
+       bool use_raw = false;
+       bool found_debit = false;
+       bool found_credit = false;
+       bool errors = false;
+       uint8_t cmdp = 0x00;
+       FILE * f;
+       char filename[FILE_PATH_SIZE] = {0};
+       uint8_t fileNameLen = 0;
+       char buf[17];
+       uint8_t *keyBlock = NULL, *p;
+       int keyitems = 0, keycnt = 0;
+
+       while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
+               switch (param_getchar(Cmd, cmdp)) {
+               case 'h':
+               case 'H':
+                       usage_hf_iclass_chk();
+                       return 0;
+               case 'f':
+               case 'F':
+                       fileNameLen = param_getstr(Cmd, cmdp+1, filename, sizeof(filename));
+                       if (fileNameLen < 1) {
+                               PrintAndLog("No filename found after f");
+                               errors = true;
+                       }
+                       cmdp += 2;
+                       break;
+               case 'e':
+               case 'E':
+                       use_elite = true;
+                       cmdp++;
+                       break;
+               case 'r':
+               case 'R':
+                       use_raw = true;
+                       cmdp++;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+       }
+
+       if (errors) {
+               usage_hf_iclass_chk();
+               return 0;
+       }
+
+       if ( !(f = fopen( filename , "r")) ) {
+               PrintAndLog("File: %s: not found or locked.", filename);
+               return 1;
+       }
+
+       while( fgets(buf, sizeof(buf), f) ){
+               if (strlen(buf) < 16 || buf[15] == '\n')
+                       continue;
+
+               while (fgetc(f) != '\n' && !feof(f)) ;  //goto next line
+
+               if( buf[0]=='#' ) continue; //The line start with # is comment, skip
+
+               if (!isxdigit(buf[0])){
+                       PrintAndLog("File content error. '%s' must include 16 HEX symbols",buf);
+                       continue;
+               }
+
+               buf[16] = 0;
+
+               p = realloc(keyBlock, 8 * (keyitems += 64));
+               if (!p) {
+                       PrintAndLog("Cannot allocate memory for default keys");
+                       free(keyBlock);
+                       fclose(f);
+                       return 2;
+               }
+               keyBlock = p;
+
+               memset(keyBlock + 8 * keycnt, 0, 8);
+               num_to_bytes(strtoull(buf, NULL, 16), 8, keyBlock + 8 * keycnt);
+
+               //PrintAndLog("check key[%2d] %016" PRIx64, keycnt, bytes_to_num(keyBlock + 8*keycnt, 8));
+               keycnt++;
+               memset(buf, 0, sizeof(buf));
+       }
+       fclose(f);
+       PrintAndLog("Loaded %2d keys from %s", keycnt, filename);
+
+       // time
+       uint64_t t1 = msclock();
+
+       uint8_t CSN[8];
+       if (!iClass_select(CSN, false, true, true)) {
+               PrintAndLog("Couldn't select card");
+               DropField();
+               return 0;
+       }
+
+       for (uint32_t c = 0; c < keycnt; c++) {
+               printf("."); fflush(stdout);
+               if (ukbhit()) {
+                       int gc = getchar(); (void)gc;
+                       printf("\naborted via keyboard!\n");
+                       break;
+               }
+
+               memcpy(key, keyBlock + 8 * c , 8);
+
+               // debit key
+               if (!iClass_authenticate(CSN, key, mac, div_key, false, use_elite, use_raw, false, false))
+                       continue;
+
+               // key found.
+               PrintAndLog("\n--------------------------------------------------------");
+               PrintAndLog("   Found AA1 debit key\t\t[%s]", sprint_hex(key, 8));
+               found_debit = true;
+
+               // credit key
+               if (!iClass_authenticate(CSN, key, mac, div_key, true, use_elite, use_raw, false, false))
+                       continue;
+
+               // key found
+               PrintAndLog("\n--------------------------------------------------------");
+               PrintAndLog("   Found AA2 credit key\t\t[%s]", sprint_hex(key, 8));
+               found_credit = true;
+
+               // both keys found.
+               if (found_debit && found_credit)
+                       break;
+       }
+
+       t1 = msclock() - t1;
+
+       PrintAndLog("\nTime in iclass checkkeys: %.0f seconds\n", (float)t1/1000.0);
+
+       DropField();
+       free(keyBlock);
+       PrintAndLog("");
+       return 0;
+}
+
+
+static void usage_hf_iclass_permutekey(void) {
+       PrintAndLogEx(NORMAL, "Convert keys from standard NIST to iClass format (and vice versa)");
+       PrintAndLogEx(NORMAL, "");
+       PrintAndLogEx(NORMAL, "Usage:  hf iclass permute [h] [r] <key>");
+       PrintAndLogEx(NORMAL, "Options:");
+       PrintAndLogEx(NORMAL, "           h          This help");
+       PrintAndLogEx(NORMAL, "           r          reverse convert key from iClass to NIST format");
+       PrintAndLogEx(NORMAL, "");
+       PrintAndLogEx(NORMAL, "Examples:");
+       PrintAndLogEx(NORMAL, "      hf iclass permute r 0123456789abcdef");
+}
+
+
+static int CmdHFiClassPermuteKey(const char *Cmd) {
+
+       uint8_t key[8] = {0};
+       uint8_t data[16] = {0};
+       bool isReverse = false;
+       int len = sizeof(data);
+       char cmdp = tolower(param_getchar(Cmd, 0));
+       if (strlen(Cmd) == 0 || cmdp == 'h') {
+               usage_hf_iclass_permutekey();
+               return 0;
+       }
+
+       if (cmdp == 'r') {
+               isReverse = true;
+               param_gethex_ex(Cmd, 1, data, &len);
+       } else if (cmdp == 'f') {
+               param_gethex_ex(Cmd, 1, data, &len);
+       } else {
+               param_gethex_ex(Cmd, 0, data, &len);
+       }
+
+
+       if (len % 2) {
+               usage_hf_iclass_permutekey();
+               return 0;
+       }
+
+       len >>= 1;
+
+       memcpy(key, data, 8);
+
+       if (isReverse) {
+               // generate_rev(data, len);
+               uint8_t key_std_format[8] = {0};
+               permutekey_rev(key, key_std_format);
+               PrintAndLogEx(SUCCESS, "key in standard NIST format:     %s \n", sprint_hex(key_std_format, 8));
+               // if (mbedtls_des_key_check_key_parity(key_std_format
+       } else {
+               // generate(data, len);
+               uint8_t key_iclass_format[8] = {0};
+               permutekey(key, key_iclass_format);
+               PrintAndLogEx(SUCCESS, "key in iClass (permuted) format: %s \n", sprint_hex(key_iclass_format, 8));
+       }
+       return 0;
+}
+
+
+static int CmdHelp(const char *Cmd);
+
+static command_t CommandTable[] = {
+       {"help",        CmdHelp,                        1,  "This help"},
+       {"calcnewkey",  CmdHFiClassCalcNewKey,          1,  "[options..] Calc Diversified keys (blocks 3 & 4) to write new keys"},
+       {"chk",         CmdHFiClassCheckKeys,           0,  "            Check keys"},
+       {"clone",       CmdHFiClassCloneTag,            0,  "[options..] Authenticate and Clone from iClass bin file"},
+       {"decrypt",     CmdHFiClassDecrypt,             1,  "[f <fname>] Decrypt tagdump" },
+       {"dump",        CmdHFiClassReader_Dump,         0,  "[options..] Authenticate and Dump iClass tag's AA1 and/or AA2"},
+       {"eload",       CmdHFiClassELoad,               0,  "[f <fname>] (experimental) Load data into iClass emulator memory"},
+       {"encryptblk",  CmdHFiClassEncryptBlk,          1,  "<BlockData> Encrypt given block data"},
+       {"list",        CmdHFiClassList,                0,  "            (Deprecated) List iClass history"},
+       {"loclass",     CmdHFiClass_loclass,            1,  "[options..] Use loclass to perform bruteforce of reader attack dump"},
+       {"managekeys",  CmdHFiClassManageKeys,          1,  "[options..] Manage the keys to use with iClass"},
+       {"permutekey",  CmdHFiClassPermuteKey,          1,  "            iClass key permutation"},
+       {"readblk",     CmdHFiClass_ReadBlock,          0,  "[options..] Authenticate and Read iClass block"},
+       {"reader",      CmdHFiClassReader,              0,  "            Look for iClass tags until a key or the pm3 button is pressed"},
+       {"readtagfile", CmdHFiClassReadTagFile,         1,  "[options..] Display Content from tagfile"},
+       {"sim",         CmdHFiClassSim,                 0,  "[options..] Simulate iClass tag"},
+       {"snoop",       CmdHFiClassSnoop,               0,  "            Eavesdrop iClass communication"},
+       {"writeblk",    CmdHFiClass_WriteBlock,         0,  "[options..] Authenticate and Write iClass block"},
        {NULL, NULL, 0, NULL}
 };
 
-int CmdHFiClass(const char *Cmd)
-{
+
+int CmdHFiClass(const char *Cmd) {
+       clearCommandBuffer();
        CmdsParse(CommandTable, Cmd);
        return 0;
 }
 
-int CmdHelp(const char *Cmd)
-{
+
+int CmdHelp(const char *Cmd) {
        CmdsHelp(CommandTable);
        return 0;
 }
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