X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/9f6e9d15755fdaefa4fee7a660cac988721268cd..0d2624a0cc13dbe34392da1f8495af6c64a84ddb:/client/cmdhficlass.c?ds=inline

diff --git a/client/cmdhficlass.c b/client/cmdhficlass.c
index f31bced7..55804cf8 100644
--- a/client/cmdhficlass.c
+++ b/client/cmdhficlass.c
@@ -1,6 +1,7 @@
 //-----------------------------------------------------------------------------
 // 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
 //
 // 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
@@ -13,21 +14,59 @@
 #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 "proxusb.h"
-#include "proxmark3.h"
+#include "comms.h"
 #include "ui.h"
 #include "cmdparser.h"
 #include "cmdhficlass.h"
 #include "common.h"
 #include "util.h"
 #include "cmdmain.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"
 
 static int CmdHelp(const char *Cmd);
 
-int xorbits_8(uint8_t val)
-{
+#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;
+
+int 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");	
+	return 0;
+}
+
+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
@@ -35,593 +74,1817 @@ int xorbits_8(uint8_t val)
 	return res & 1;
 }
 
-int CmdHFiClassList(const char *Cmd)
-{
+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};
+	SendCommand(&c);
+	return 0;
+}
+
+int usage_hf_iclass_sim(void) {
+	PrintAndLog("Usage:  hf iclass sim <option> [CSN]");
+	PrintAndLog("        options");
+	PrintAndLog("                0 <CSN> simulate the given CSN");
+	PrintAndLog("                1       simulate default CSN");
+	PrintAndLog("                2       Reader-attack, gather reader responses to extract elite key");
+	PrintAndLog("                3       Full simulation using emulator memory (see 'hf iclass eload')");
+	PrintAndLog("        example: hf iclass sim 0 031FEC8AF7FF12E0");
+	PrintAndLog("        example: hf iclass sim 2");
+	PrintAndLog("        example: hf iclass eload 'tagdump.bin'");
+	PrintAndLog("                 hf iclass sim 3");
+	return 0;
+}
+
+#define NUM_CSNS 15
+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();
+	}
+	simType = param_get8ex(Cmd, 0, 0, 10);
+
+	if(simType == 0)
+	{
+		if (param_gethex(Cmd, 1, CSN, 16)) {
+			PrintAndLog("A CSN should consist of 16 HEX symbols");
+			return usage_hf_iclass_sim();
+		}
+
+		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}};
+		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);
+
+		SendCommand(&c);
+		if (!WaitForResponseTimeout(CMD_ACK, &resp, -1)) {
+			PrintAndLog("Command timed out");
+			return 0;
+		}
 
-	bool ShowWaitCycles = false;
-	char param = param_getchar(Cmd, 0);
+		uint8_t num_mac_responses  = resp.arg[1];
+		PrintAndLog("Mac responses: %d MACs obtained (should be %d)", num_mac_responses,NUM_CSNS);
 
-	if (param != 0) {
-		PrintAndLog("List data in trace buffer.");
-		PrintAndLog("Usage:  hf iclass list");
-		PrintAndLog("h - help");
-		PrintAndLog("sample: hf iclass list");
+		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>....
+		 * So, it should wind up as
+		 * 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
+		 **/
+		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...
+			//Then comes NR_MAC (eight bytes from the response)
+			memcpy(dump+i*24+16,resp.d.asBytes+i*8,8);
+
+		}
+		/** Now, save to dumpfile **/
+		saveFile("iclass_mac_attack", "bin", dump,datalen);
+		free(dump);
+	}else
+	{
+		UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
+		memcpy(c.d.asBytes, CSN, 8);
+		SendCommand(&c);
+	}
+
+	return 0;
+}
+
+int HFiClassReader(const char *Cmd, bool loop, bool verbose) {
+	bool tagFound = false;
+	UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_CSN |
+		    FLAG_ICLASS_READER_CC | FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_AA |
+		    FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_ONE_TRY } };
+	// loop in client not device - else on windows have a communication error
+	UsbCommand resp;
+	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 or button pressed
+			if( (readStatus == 0 && !loop) || readStatus == 0xFF) {
+				// abort
+				if (verbose) PrintAndLog("Quitting...");
+				return 0;
+			}
+
+			if( readStatus & FLAG_ICLASS_READER_CSN) {
+				PrintAndLog("   CSN: %s",sprint_hex(data,8));
+				tagFound = true;
+			}
+			if( readStatus & FLAG_ICLASS_READER_CC) { 
+				PrintAndLog("    CC: %s",sprint_hex(data+16,8));
+			}
+			if( readStatus & FLAG_ICLASS_READER_CONF) {
+				printIclassDumpInfo(data);
+			}
+			if (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 {
+			if (verbose) PrintAndLog("Command execute timeout");
+		}
+		if (!loop) break;
+	}
+	return 0;
+}
+
+int CmdHFiClassReader(const char *Cmd) {
+	return HFiClassReader(Cmd, true, true);
+}
+
+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;
 	}
 
-	uint8_t got[1920];
-	GetFromBigBuf(got,sizeof(got),0);
-	WaitForResponse(CMD_ACK,NULL);
+	if (param_gethex(Cmd, 0, MAC, 8)) {
+		PrintAndLog("MAC must include 8 HEX symbols");
+		return 1;
+	}
 
-	PrintAndLog("Recorded Activity");
-	PrintAndLog("");
-	PrintAndLog("Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer");
-	PrintAndLog("All times are in carrier periods (1/13.56Mhz)");
+	UsbCommand c = {CMD_READER_ICLASS_REPLAY, {readerType}};
+	memcpy(c.d.asBytes, MAC, 4);
+	SendCommand(&c);
+
+	return 0;
+}
+
+int iclassEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {
+	UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};
+	memcpy(c.d.asBytes, data, blocksCount * 16);
+	SendCommand(&c);
+	return 0;
+}
+
+int hf_iclass_eload_usage(void) {
+	PrintAndLog("Loads iclass tag-dump into emulator memory on device");
+	PrintAndLog("Usage:  hf iclass eload f <filename>");
 	PrintAndLog("");
-	PrintAndLog("     Start |       End | Src | Data");
-	PrintAndLog("-----------|-----------|-----|--------");
+	PrintAndLog("Example: hf iclass eload f iclass_tagdump-aa162d30f8ff12f1.bin");
+	return 0;
+}
 
-	int i;
-	uint32_t first_timestamp = 0;
-	uint32_t timestamp;
-	bool tagToReader;
-	uint32_t parityBits;
-	uint8_t len;
-	uint8_t *frame;
-	uint32_t EndOfTransmissionTimestamp = 0;
+int CmdHFiClassELoad(const char *Cmd) {
 
+	char opt = param_getchar(Cmd, 0);
+	if (strlen(Cmd)<1 || opt == 'h')
+		return hf_iclass_eload_usage();
 
-	for( i=0; i < 1900;)
+	//File handling and reading
+	FILE *f;
+	char filename[FILE_PATH_SIZE];
+	if(opt == 'f' && param_getstr(Cmd, 1, filename, sizeof(filename)) > 0)
 	{
-		//First 32 bits contain
-		// isResponse (1 bit)
-		// timestamp (remaining)
-		//Then paritybits
-		//Then length
-		timestamp = *((uint32_t *)(got+i));
-		parityBits = *((uint32_t *)(got+i+4));
-		len = got[i+8];
-		frame = (got+i+9);
-		uint32_t next_timestamp = (*((uint32_t *)(got+i+9))) & 0x7fffffff;
-
-		tagToReader = timestamp & 0x80000000;
-		timestamp &= 0x7fffffff;
-
-		if(i==0) {
-			first_timestamp = timestamp;
-		}
+		f = fopen(filename, "rb");
+	}else{
+		return hf_iclass_eload_usage();
+	}
+
+	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);
+
+	printIclassDumpInfo(dump);
+	//Validate
+
+	if (bytes_read < fsize)
+	{
+		prnlog("Error, could only read %d bytes (should be %d)",bytes_read, fsize );
+		free(dump);
+		return 1;
+	}
+	//Send to device
+	uint32_t bytes_sent = 0;
+	uint32_t bytes_remaining  = bytes_read;
+
+	while(bytes_remaining > 0){
+		uint32_t bytes_in_packet = MIN(USB_CMD_DATA_SIZE, bytes_remaining);
+		UsbCommand c = {CMD_ICLASS_EML_MEMSET, {bytes_sent,bytes_in_packet,0}};
+		memcpy(c.d.asBytes, dump, bytes_in_packet);
+		SendCommand(&c);
+		bytes_remaining -= bytes_in_packet;
+		bytes_sent += bytes_in_packet;
+	}
+	free(dump);
+	PrintAndLog("Sent %d bytes of data to device emulator memory", bytes_sent);
+	return 0;
+}
+
+static int readKeyfile(const char *filename, size_t len, uint8_t* buffer) {
+	FILE *f = fopen(filename, "rb");
+	if(!f) {
+		PrintAndLog("Failed to read from file '%s'", filename);
+		return 1;
+	}
+	fseek(f, 0, SEEK_END);
+	long fsize = ftell(f);
+	fseek(f, 0, SEEK_SET);
+	size_t bytes_read = fread(buffer, 1, len, f);
+	fclose(f);
+	if(fsize != len)
+	{
+		PrintAndLog("Warning, file size is %d, expected %d", fsize, len);
+		return 1;
+	}
+	if(bytes_read != len)
+	{
+		PrintAndLog("Warning, could only read %d bytes, expected %d" ,bytes_read, len);
+		return 1;
+	}
+	return 0;
+}
 
-		// Break and stick with current result if buffer was not completely full
-		if (frame[0] == 0x44 && frame[1] == 0x44 && frame[2] == 0x44 && frame[3] == 0x44) break;
+int 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.");
+	return 1;
+}
 
-		char line[1000] = "";
+int CmdHFiClassDecrypt(const char *Cmd) {
+	uint8_t key[16] = { 0 };
+	if(readKeyfile("iclass_decryptionkey.bin", 16, key))
+	{
+		usage_hf_iclass_decrypt();
+		return 1;
+	}
+	PrintAndLog("Decryption file found... ");
+	char opt = param_getchar(Cmd, 0);
+	if (strlen(Cmd)<1 || opt == 'h')
+		return usage_hf_iclass_decrypt();
+
+	//Open the tagdump-file
+	FILE *f;
+	char filename[FILE_PATH_SIZE];
+	if(opt == 'f' && param_getstr(Cmd, 1, filename, sizeof(filename)) > 0) {
+		f = fopen(filename, "rb");
+		if ( f == NULL ) {
+			PrintAndLog("Could not find file %s", filename);
+			return 1;
+		}
+	} else {
+		return usage_hf_iclass_decrypt();
+	}
 
-		if(len)//We have some data to display
+	fseek(f, 0, SEEK_END);
+	long fsize = ftell(f);
+	fseek(f, 0, SEEK_SET);
+	uint8_t enc_dump[8] = {0};
+	uint8_t *decrypted = malloc(fsize);
+	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
+	char outfilename[FILE_PATH_SIZE] = { 0 };
+	snprintf(outfilename,FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x-decrypted",
+			 enc_dump[0],enc_dump[1],enc_dump[2],enc_dump[3],
+			 enc_dump[4],enc_dump[5],enc_dump[6],enc_dump[7]);
+
+	size_t blocknum =0;
+	while(bytes_read == 8)
+	{
+		if(blocknum < 7)
 		{
-			int j,oddparity;
+			memcpy(decrypted+(blocknum*8), enc_dump, 8);
+		}else{
+			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);
+		blocknum++;
+	}
+	fclose(f);
 
-			for(j = 0; j < len ; j++)
-			{
-				oddparity = 0x01 ^ xorbits_8(frame[j] & 0xFF);
+	saveFile(outfilename,"bin", decrypted, blocknum*8);
+	free(decrypted);
+	return 0;
+}
+
+int 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("");
+	return 0;
+}
+
+static int iClassEncryptBlkData(uint8_t *blkData) {
+	uint8_t key[16] = { 0 };
+	if(readKeyfile("iclass_decryptionkey.bin", 16, key))
+	{
+		usage_hf_iclass_encrypt();
+		return 1;
+	}
+	PrintAndLog("Decryption file found... ");
+
+	uint8_t encryptedData[16];
+	uint8_t *encrypted = encryptedData;
+	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;
+}
+
+int CmdHFiClassEncryptBlk(const char *Cmd) {
+	uint8_t blkData[8] = {0};
+	char opt = param_getchar(Cmd, 0);
+	if (strlen(Cmd)<1 || opt == 'h')
+		return usage_hf_iclass_encrypt();
 
-				if (tagToReader && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
-					sprintf(line+(j*4), "%02x!  ", frame[j]);
+	//get the bytes to encrypt
+	if (param_gethex(Cmd, 0, blkData, 16))
+	{
+		PrintAndLog("BlockData must include 16 HEX symbols");
+		return 0;
+	}
+	if (!iClassEncryptBlkData(blkData)) return 0;
+
+	printvar("encrypted block", blkData, 8);
+	return 1;
+}
+
+void Calc_wb_mac(uint8_t blockno, uint8_t *data, uint8_t *div_key, uint8_t MAC[4]) {
+	uint8_t WB[9];
+	WB[0] = blockno;
+	memcpy(WB + 1,data,8);
+	doMAC_N(WB,sizeof(WB),div_key,MAC);
+	//printf("Cal wb mac block [%02x][%02x%02x%02x%02x%02x%02x%02x%02x] : MAC [%02x%02x%02x%02x]",WB[0],WB[1],WB[2],WB[3],WB[4],WB[5],WB[6],WB[7],WB[8],MAC[0],MAC[1],MAC[2],MAC[3]);
+}
+
+static bool select_only(uint8_t *CSN, uint8_t *CCNR, bool use_credit_key, bool verbose) {
+	UsbCommand resp;
+
+	UsbCommand c = {CMD_READER_ICLASS, {0}};
+	c.arg[0] = FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_CC | FLAG_ICLASS_READER_ONE_TRY;
+	if (use_credit_key)
+		c.arg[0] |= FLAG_ICLASS_READER_CEDITKEY;
+
+	clearCommandBuffer();
+	SendCommand(&c);
+	if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
+	{
+		PrintAndLog("Command execute timeout");
+		return false;
+	}
+
+	uint8_t isOK = resp.arg[0] & 0xff;
+	uint8_t *data = resp.d.asBytes;
+
+	memcpy(CSN,data,8);
+	if (CCNR!=NULL)memcpy(CCNR,data+16,8);
+	if(isOK > 0)
+	{
+		if (verbose) PrintAndLog("CSN: %s",sprint_hex(CSN,8));
+	}
+	if(isOK <= 1){
+		PrintAndLog("Failed to obtain CC! Aborting");
+		return false;
+	}
+	return true;	
+}
+
+static bool select_and_auth(uint8_t *KEY, uint8_t *MAC, uint8_t *div_key, bool use_credit_key, bool elite, bool rawkey, bool verbose) {
+	uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+	uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+
+	if (!select_only(CSN, CCNR, use_credit_key, verbose))
+		return false;
+
+	//get div_key
+	if(rawkey)
+		memcpy(div_key, KEY, 8);
+	else
+		HFiClassCalcDivKey(CSN, KEY, div_key, elite);
+	 if (verbose) PrintAndLog("Authing with %s: %02x%02x%02x%02x%02x%02x%02x%02x", rawkey ? "raw key" : "diversified key", div_key[0],div_key[1],div_key[2],div_key[3],div_key[4],div_key[5],div_key[6],div_key[7]);
+
+	doMAC(CCNR, div_key, MAC);
+	UsbCommand resp;
+	UsbCommand d = {CMD_ICLASS_AUTHENTICATION, {0}};
+	memcpy(d.d.asBytes, MAC, 4);
+	clearCommandBuffer();
+	SendCommand(&d);
+	if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
+	{
+		if (verbose) PrintAndLog("Auth Command execute timeout");
+		return false;
+	}
+	uint8_t isOK = resp.arg[0] & 0xff;
+	if (!isOK) {
+		if (verbose) PrintAndLog("Authentication error");
+		return false;
+	}
+	return true;
+}
+
+int usage_hf_iclass_dump(void) {
+	PrintAndLog("Usage:  hf iclass dump f <fileName> k <Key> c <CreditKey> e|r\n");
+	PrintAndLog("Options:");
+	PrintAndLog("  f <filename> : specify a filename to save dump to");
+	PrintAndLog("  k <Key>      : *Access Key as 16 hex symbols or 1 hex to select key from memory");
+	PrintAndLog("  c <CreditKey>: Credit Key as 16 hex symbols or 1 hex to select key from memory");
+	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("  r            : If 'r' is specified, the key is interpreted as raw block 3/4");
+	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");
+	return 0;
+}
+
+int CmdHFiClassReader_Dump(const char *Cmd) {
+
+	uint8_t MAC[4] = {0x00,0x00,0x00,0x00};
+	uint8_t div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+	uint8_t c_div_key[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+	uint8_t blockno = 0;
+	uint8_t numblks = 0;
+	uint8_t maxBlk = 31;
+	uint8_t app_areas = 1;
+	uint8_t kb = 2;
+	uint8_t KEY[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+	uint8_t CreditKEY[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+	uint8_t keyNbr = 0;
+	uint8_t dataLen = 0;
+	uint8_t fileNameLen = 0;
+	char filename[FILE_PATH_SIZE]={0};
+	char tempStr[50] = {0};
+	bool have_debit_key = false;
+	bool have_credit_key = false;
+	bool use_credit_key = false;
+	bool elite = false;
+	bool rawkey = false;
+	bool errors = false;
+	uint8_t cmdp = 0;
+
+	while(param_getchar(Cmd, cmdp) != 0x00)
+	{
+		switch(param_getchar(Cmd, cmdp))
+		{
+		case 'h':
+		case 'H':
+			return usage_hf_iclass_dump();
+		case 'c':
+		case 'C':
+			have_credit_key = true;
+			dataLen = param_getstr(Cmd, cmdp+1, tempStr, 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 {
-					sprintf(line+(j*4), "%02x   ", frame[j]);
+					PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
+					errors = true;
 				}
+			} else {
+				PrintAndLog("\nERROR: Credit Key is incorrect length\n");
+				errors = true;
 			}
-		}else
-		{
-			if (ShowWaitCycles) {
-				sprintf(line, "fdt (Frame Delay Time): %d", (next_timestamp - timestamp));
+			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;
+		default:
+			PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+			errors = true;
+			break;
 		}
+		if(errors) return usage_hf_iclass_dump();
+	}
 
-		char *crc = "";
+	if (cmdp < 2) return usage_hf_iclass_dump();
+	// if no debit key given try credit key on AA1 (not for iclass but for some picopass this will work)
+	if (!have_debit_key && have_credit_key) use_credit_key = true;
 
-		if(len > 2)
-		{
-			uint8_t b1, b2;
-			if(!tagToReader && len == 4) {
-				// Rough guess that this is a command from the reader
-				// For iClass the command byte is not part of the CRC
-					ComputeCrc14443(CRC_ICLASS, &frame[1], len-3, &b1, &b2);
+	//get config and first 3 blocks
+	UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_CSN |
+					FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_ONE_TRY}};
+	UsbCommand resp;
+	uint8_t tag_data[255*8];
+
+	clearCommandBuffer();
+	SendCommand(&c);
+	if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+		PrintAndLog("Command execute timeout");
+		DropField();
+		return 0;
+	}
+	uint8_t readStatus = resp.arg[0] & 0xff;
+	uint8_t *data = resp.d.asBytes;
+
+	if(readStatus == 0){
+		PrintAndLog("No tag found...");
+		DropField();
+		return 0;
+	}
+	if( readStatus & (FLAG_ICLASS_READER_CSN|FLAG_ICLASS_READER_CONF|FLAG_ICLASS_READER_CC)){
+		memcpy(tag_data, data, 8*3);
+		blockno+=2; // 2 to force re-read of block 2 later. (seems to respond differently..)
+		numblks = data[8];
+		getMemConfig(data[13], data[12], &maxBlk, &app_areas, &kb);
+		// large memory - not able to dump pages currently
+		if (numblks > maxBlk) numblks = maxBlk;
+	}
+	DropField();
+	// authenticate debit key and get div_key - later store in dump block 3
+	if (!select_and_auth(KEY, MAC, div_key, use_credit_key, elite, rawkey, false)){
+		//try twice - for some reason it sometimes fails the first time...
+		if (!select_and_auth(KEY, MAC, div_key, use_credit_key, elite, rawkey, false)){
+			DropField();
+			return 0;
+		}
+	}
+	
+	// begin dump
+	UsbCommand w = {CMD_ICLASS_DUMP, {blockno, numblks-blockno+1}};
+	clearCommandBuffer();
+	SendCommand(&w);
+	if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+		PrintAndLog("Command execute time-out 1");
+		DropField();
+		return 1;
+	}
+	uint32_t blocksRead = resp.arg[1];
+	uint8_t isOK = resp.arg[0] & 0xff;
+	if (!isOK && !blocksRead) {
+		PrintAndLog("Read Block Failed");
+		DropField();
+		return 0;
+	}
+	uint32_t startindex = resp.arg[2];
+	if (blocksRead*8 > sizeof(tag_data)-(blockno*8)) {
+		PrintAndLog("Data exceeded Buffer size!");
+		blocksRead = (sizeof(tag_data)/8) - blockno;
+	}
+	// response ok - now get bigbuf content of the dump
+	GetFromBigBuf(tag_data+(blockno*8), blocksRead*8, startindex, NULL, -1, false);
+	size_t gotBytes = blocksRead*8 + blockno*8;
+
+	// try AA2
+	if (have_credit_key) {
+		//turn off hf field before authenticating with different key
+		DropField();
+		memset(MAC,0,4);
+		// AA2 authenticate credit key and git c_div_key - later store in dump block 4
+		if (!select_and_auth(CreditKEY, MAC, c_div_key, true, false, false, false)){
+			//try twice - for some reason it sometimes fails the first time...
+			if (!select_and_auth(CreditKEY, MAC, c_div_key, true, false, false, false)){
+				DropField();
+				return 0;
 			}
-			else {
-				  // For other data.. CRC might not be applicable (UPDATE commands etc.)
-				ComputeCrc14443(CRC_ICLASS, frame, len-2, &b1, &b2);
+		}
+		// do we still need to read more block?  (aa2 enabled?)
+		if (maxBlk > blockno+numblks+1) {
+			// setup dump and start
+			w.arg[0] = blockno + blocksRead;
+			w.arg[1] = maxBlk - (blockno + blocksRead);
+			clearCommandBuffer();
+			SendCommand(&w);
+			if (!WaitForResponseTimeout(CMD_ACK, &resp, 4500)) {
+				PrintAndLog("Command execute timeout 2");
+				DropField();
+				return 0;
 			}
-
-			if (b1 != frame[len-2] || b2 != frame[len-1]) {
-				crc = (tagToReader & (len < 8)) ? "" : " !crc";
+			uint8_t isOK = resp.arg[0] & 0xff;
+			blocksRead = resp.arg[1];
+			if (!isOK && !blocksRead) {
+				PrintAndLog("Read Block Failed 2");
+				DropField();
+				return 0;
+			}		
+
+			startindex = resp.arg[2];
+			if (blocksRead*8 > sizeof(tag_data)-gotBytes) {
+				PrintAndLog("Data exceeded Buffer size!");
+				blocksRead = (sizeof(tag_data) - gotBytes)/8;
 			}
+			// get dumped data from bigbuf
+			GetFromBigBuf(tag_data+gotBytes, blocksRead*8, startindex, NULL, -1, false);
+
+			gotBytes += blocksRead*8;			
+		} else { //field is still on - turn it off...
+			DropField();
 		}
+	}
+
+	// add diversified keys to dump
+	if (have_debit_key) memcpy(tag_data+(3*8),div_key,8);
+	if (have_credit_key) memcpy(tag_data+(4*8),c_div_key,8);
+	// print the dump
+	printf("------+--+-------------------------+\n");
+	printf("CSN   |00| %s|\n",sprint_hex(tag_data, 8));
+	printIclassDumpContents(tag_data, 1, (gotBytes/8), gotBytes);
+	
+	if (filename[0] == 0){
+		snprintf(filename, FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x",
+		    tag_data[0],tag_data[1],tag_data[2],tag_data[3],
+		    tag_data[4],tag_data[5],tag_data[6],tag_data[7]);
+	}
 
-		i += (len + 9);
-		EndOfTransmissionTimestamp = (*((uint32_t *)(got+i))) & 0x7fffffff;
+	// save the dump to .bin file
+	PrintAndLog("Saving dump file - %d blocks read", gotBytes/8);
+	saveFile(filename, "bin", tag_data, gotBytes);
+	return 1;
+}
+
+static int WriteBlock(uint8_t blockno, uint8_t *bldata, uint8_t *KEY, bool use_credit_key, bool elite, bool rawkey, bool verbose) {
+	uint8_t MAC[4]={0x00,0x00,0x00,0x00};
+	uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+	if (!select_and_auth(KEY, MAC, div_key, use_credit_key, elite, rawkey, verbose))
+		return 0;
 
-		// Not implemented for iclass on the ARM-side
-		//if (!ShowWaitCycles) i += 9;
+	UsbCommand resp;
 
-		PrintAndLog(" %9d | %9d | %s | %s %s",
-			(timestamp - first_timestamp),
-			(EndOfTransmissionTimestamp - first_timestamp),
-			(len?(tagToReader ? "Tag" : "Rdr"):"   "),
-			line, crc);
+	Calc_wb_mac(blockno,bldata,div_key,MAC);
+	UsbCommand w = {CMD_ICLASS_WRITEBLOCK, {blockno}};
+	memcpy(w.d.asBytes, bldata, 8);
+	memcpy(w.d.asBytes + 8, MAC, 4);
+	
+	clearCommandBuffer();
+	SendCommand(&w);
+	if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
+	{
+		PrintAndLog("Write Command execute timeout");
+		return 0;
 	}
+	uint8_t isOK = resp.arg[0] & 0xff;
+	if (!isOK) {
+		PrintAndLog("Write Block Failed");
+		return 0;
+	}
+	PrintAndLog("Write Block Successful");
+	return 1;
+}
+
+int 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");
 	return 0;
 }
 
-int CmdHFiClassListOld(const char *Cmd)
-{
-  uint8_t got[1920];
-  GetFromBigBuf(got,sizeof(got),0);
-
-  PrintAndLog("recorded activity:");
-  PrintAndLog(" ETU     :rssi: who bytes");
-  PrintAndLog("---------+----+----+-----------");
-
-  int i = 0;
-  int prev = -1;
-
-  for (;;) {
-    if(i >= 1900) {
-      break;
-    }
-
-    bool isResponse;
-    int timestamp = *((uint32_t *)(got+i));
-    if (timestamp & 0x80000000) {
-      timestamp &= 0x7fffffff;
-      isResponse = 1;
-    } else {
-      isResponse = 0;
-    }
-
-
-    int metric = 0;
-
-    int parityBits = *((uint32_t *)(got+i+4));
-    // 4 bytes of additional information...
-    // maximum of 32 additional parity bit information
-    //
-    // TODO:
-    // at each quarter bit period we can send power level (16 levels)
-    // or each half bit period in 256 levels.
-
-
-    int len = got[i+8];
-
-    if (len > 100) {
-      break;
-    }
-    if (i + len >= 1900) {
-      break;
-    }
-
-    uint8_t *frame = (got+i+9);
-
-    // Break and stick with current result if buffer was not completely full
-    if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
-
-    char line[1000] = "";
-    int j;
-    for (j = 0; j < len; j++) {
-      int oddparity = 0x01;
-      int k;
-
-      for (k=0;k<8;k++) {
-        oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
-      }
-
-      //if((parityBits >> (len - j - 1)) & 0x01) {
-      if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
-        sprintf(line+(j*4), "%02x!  ", frame[j]);
-      }
-      else {
-        sprintf(line+(j*4), "%02x   ", frame[j]);
-      }
-    }
-
-    char *crc;
-    crc = "";
-    if (len > 2) {
-      uint8_t b1, b2;
-      for (j = 0; j < (len - 1); j++) {
-        // gives problems... search for the reason..
-        /*if(frame[j] == 0xAA) {
-          switch(frame[j+1]) {
-            case 0x01:
-              crc = "[1] Two drops close after each other";
-            break;
-            case 0x02:
-              crc = "[2] Potential SOC with a drop in second half of bitperiod";
-              break;
-            case 0x03:
-              crc = "[3] Segment Z after segment X is not possible";
-              break;
-            case 0x04:
-              crc = "[4] Parity bit of a fully received byte was wrong";
-              break;
-            default:
-              crc = "[?] Unknown error";
-              break;
-          }
-          break;
-        }*/
-      }
-
-      if (strlen(crc)==0) {
-	if(!isResponse && len == 4) {
-		// Rough guess that this is a command from the reader
-		// For iClass the command byte is not part of the CRC
-	        ComputeCrc14443(CRC_ICLASS, &frame[1], len-3, &b1, &b2);
-	}
-	else {
-		// For other data.. CRC might not be applicable (UPDATE commands etc.)
-	        ComputeCrc14443(CRC_ICLASS, frame, len-2, &b1, &b2);
-	}
-	//printf("%1x %1x",(unsigned)b1,(unsigned)b2);
-        if (b1 != frame[len-2] || b2 != frame[len-1]) {
-          crc = (isResponse & (len < 8)) ? "" : " !crc";
-        } else {
-          crc = "";
-        }
-      }
-    } else {
-      crc = ""; // SHORT
-    }
-
-    char metricString[100];
-    if (isResponse) {
-      sprintf(metricString, "%3d", metric);
-    } else {
-      strcpy(metricString, "   ");
-    }
-
-    PrintAndLog(" +%7d: %s: %s %s %s",
-      (prev < 0 ? 0 : (timestamp - prev)),
-      metricString,
-      (isResponse ? "TAG" : "   "), line, crc);
-
-    prev = timestamp;
-    i += (len + 9);
-  }
-  return 0;
-}
-
-/*void iso14a_set_timeout(uint32_t timeout) {
-	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_SET_TIMEOUT, 0, timeout}};
-	SendCommand(&c);
-}*/
+int CmdHFiClass_WriteBlock(const char *Cmd) {
+	uint8_t blockno=0;
+	uint8_t bldata[8]={0,0,0,0,0,0,0,0};
+	uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+	uint8_t keyNbr = 0;
+	uint8_t dataLen = 0;
+	char tempStr[50] = {0};
+	bool use_credit_key = false;
+	bool elite = false;
+	bool rawkey= false;
+	bool errors = false;
+	uint8_t cmdp = 0;
+	while(param_getchar(Cmd, cmdp) != 0x00)
+	{
+		switch(param_getchar(Cmd, cmdp))
+		{
+		case 'h':
+		case 'H':
+			return usage_hf_iclass_writeblock();
+		case 'b':
+		case 'B':
+			if (param_gethex(Cmd, cmdp+1, &blockno, 2)) {
+				PrintAndLog("Block No must include 2 HEX symbols\n");
+				errors = true;
+			}
+			cmdp += 2;
+			break;
+		case 'c':
+		case 'C':
+			use_credit_key = true;
+			cmdp++;
+			break;
+		case 'd':
+		case 'D':
+			if (param_gethex(Cmd, cmdp+1, bldata, 16))
+			{
+				PrintAndLog("KEY must include 16 HEX symbols\n");
+				errors = true;
+			}
+			cmdp += 2;
+			break;
+		case 'e':
+		case 'E':
+			elite = true;
+			cmdp++;
+			break;
+		case 'k':
+		case 'K':
+			dataLen = param_getstr(Cmd, cmdp+1, tempStr, 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) return usage_hf_iclass_writeblock();
+	}
 
-int CmdHFiClassSnoop(const char *Cmd)
-{
-  UsbCommand c = {CMD_SNOOP_ICLASS};
-  SendCommand(&c);
-  return 0;
+	if (cmdp < 6) return usage_hf_iclass_writeblock();
+	int ans = WriteBlock(blockno, bldata, KEY, use_credit_key, elite, rawkey, true);
+	DropField();
+	return ans;
 }
 
-int CmdHFiClassSim(const char *Cmd)
-{
-  uint8_t simType = 0;
-  uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+int 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");
+	return -1;
+}
 
-  if (strlen(Cmd)<1) {
-	PrintAndLog("Usage:  hf iclass sim [0 <CSN>] | x");
-	PrintAndLog("        options");
-	PrintAndLog("                0 <CSN> simulate the given CSN");
-	PrintAndLog("                1       simulate default CSN");
-	PrintAndLog("                2       iterate CSNs, gather MACs");
-	PrintAndLog("        sample: hf iclass sim 0 031FEC8AF7FF12E0");
-	PrintAndLog("        sample: hf iclass sim 2");
-	return 0;
-  }	
-
-  simType = param_get8(Cmd, 0);
-
-  if(simType == 0)
-  {
-	  if (param_gethex(Cmd, 1, CSN, 16)) {
-		  PrintAndLog("A CSN should consist of 16 HEX symbols");
-		  return 1;
-	  }
-	  PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
-
-  }
-  if(simType > 5)
-  {
-	  PrintAndLog("Undefined simptype %d", simType);
-	  return 1;
-  }
-  uint8_t numberOfCSNs=0;
+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)
+	{
+		switch(param_getchar(Cmd, cmdp))
+		{
+		case 'h':
+		case 'H':
+			return usage_hf_iclass_clone();
+		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) return usage_hf_iclass_clone();
+	}
 
-	if(simType == 2)
+	if (cmdp < 8) return usage_hf_iclass_clone();
+
+	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};
+
+	if (!select_and_auth(KEY, MAC, div_key, use_credit_key, elite, rawkey, true))
+		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))
 	{
-		UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,63}};
-		UsbCommand resp = {0};
+		PrintAndLog("Command execute timeout");
+		return 0;
+	}
+	return 1;
+}
 
-		uint8_t csns1[] ={
-			  /* Order    Simulated CSN                               HASH1           Recovered key bytes */
-			  /*   1   */ 0x00,0x0B,0x0F,0xFF,0xF7,0xFF,0x12,0xE0,// 0101000045014545 00,01 45
-			  /*   2   */  0x03,0x0B,0x0E,0xFE,0xF7,0xFF,0x12,0xE0,// 0202000045014545 02
-			  /*   3   */  0x04,0x0D,0x0D,0xFD,0xF7,0xFF,0x12,0xE0,// 0303000045014545 03
-			  /*   4   */  0x04,0x0F,0x0F,0xF7,0xF7,0xFF,0x12,0xE0,// 0901000045014545 09
-			  /*   5   */  0x01,0x13,0x10,0xF4,0xF7,0xFF,0x12,0xE0,// 0C00000045014545 0C
-			  /*   6   */  0x02,0x14,0x10,0xF2,0xF7,0xFF,0x12,0xE0,// 0E00000045014545 0E
-			  /*   7   */  0x05,0x17,0x10,0xEC,0xF7,0xFF,0x12,0xE0,// 1400000045014545 14
-			  /*   8   */  0x00,0x6B,0x6F,0xDF,0xF7,0xFF,0x12,0xE0,// 2121000045014545 21
-			  /*   9   */  0x03,0x6B,0x6E,0xDE,0xF7,0xFF,0x12,0xE0,// 2222000045014545 22
-			  /*   10  */  0x04,0x6D,0x6D,0xDD,0xF7,0xFF,0x12,0xE0,// 2323000045014545 23
-			  /*   11  */  0x00,0x4F,0x4B,0x43,0xF7,0xFF,0x12,0xE0,// 3D45000045014545 3D
-			  /*   12  */  0x00,0x4B,0x4F,0x3F,0xF7,0xFF,0x12,0xE0,// 4141000045014545 41
-			  /*   13  */  0x03,0x4B,0x4E,0x3E,0xF7,0xFF,0x12,0xE0,// 4242000045014545 42
-			  /*   14  */  0x04,0x4D,0x4D,0x3D,0xF7,0xFF,0x12,0xE0,// 4343000045014545 43
-			  /*   15  */  0x04,0x37,0x37,0x7F,0xF7,0xFF,0x12,0xE0,// 0159000045014545 59
-			  /*   16  */  0x00,0x2B,0x2F,0x9F,0xF7,0xFF,0x12,0xE0,// 6161000045014545 61
-			  /*   17  */  0x03,0x2B,0x2E,0x9E,0xF7,0xFF,0x12,0xE0,// 6262000045014545 62
-			  /*   18  */  0x04,0x2D,0x2D,0x9D,0xF7,0xFF,0x12,0xE0,// 6363000045014545 63
-			  /*   19  */  0x00,0x27,0x23,0xBB,0xF7,0xFF,0x12,0xE0,// 456D000045014545 6D
-			  /*   20  */  0x02,0x52,0xAA,0x80,0xF7,0xFF,0x12,0xE0,// 0066000045014545 66
-			  /*   21  */  0x00,0x5C,0xA6,0x80,0xF7,0xFF,0x12,0xE0,// 006A000045014545 6A
-			  /*   22  */  0x01,0x5F,0xA4,0x80,0xF7,0xFF,0x12,0xE0,// 006C000045014545 6C
-			  /*   23  */  0x06,0x5E,0xA2,0x80,0xF7,0xFF,0x12,0xE0,// 006E000045014545 6E
-			  /*   24  */  0x02,0x0E,0x0E,0xFC,0xF7,0xFF,0x12,0xE0,// 0402000045014545 04
-			  /*   25  */  0x05,0x0D,0x0E,0xFA,0xF7,0xFF,0x12,0xE0,// 0602000045014545 06
-			  /*   26  */  0x06,0x0F,0x0D,0xF9,0xF7,0xFF,0x12,0xE0,// 0703000045014545 07
-			  /*   27  */  0x00,0x01,0x05,0x1D,0xF7,0xFF,0x12,0xE0,// 630B000045014545 0B
-			  /*   28  */  0x02,0x07,0x01,0x1D,0xF7,0xFF,0x12,0xE0,// 630F000045014545 0F
-			  /*   29  */  0x04,0x7F,0x7F,0xA7,0xF7,0xFF,0x12,0xE0,// 5911000045014545 11
-			  /*   30  */  0x04,0x60,0x6E,0xE8,0xF7,0xFF,0x12,0xE0,// 1822000045014545 18
-			  /*31*/ 0x04,0x77,0x77,0xBF,0xF7,0xFF,0x12,0xE0, // 4119000045014545 19
-			  /*32*/ 0x00,0x69,0x6D,0xE5,0xF7,0xFF,0x12,0xE0, // 1B23000045014545 1B
-			  /*33*/ 0x01,0x69,0x6E,0xE2,0xF7,0xFF,0x12,0xE0, // 1E22000045014545 1E
-			  /*34*/ 0x02,0x6B,0x6D,0xE1,0xF7,0xFF,0x12,0xE0, // 1F23000045014545 1F
-			  /*35*/ 0x01,0x3F,0x04,0xE0,0xF7,0xFF,0x12,0xE0, // 200C000045014545 20
-			  /*36*/ 0x02,0x6E,0x6E,0xDC,0xF7,0xFF,0x12,0xE0, // 2422000045014545 24
-			  /*37*/ 0x05,0x6D,0x6E,0xDA,0xF7,0xFF,0x12,0xE0, // 2622000045014545 26
-			  /*38*/ 0x06,0x6F,0x6D,0xD9,0xF7,0xFF,0x12,0xE0, // 2723000045014545 27
-			  /*39*/ 0x01,0x6B,0x68,0xEC,0xF7,0xFF,0x12,0xE0, // 1428000045014545 28
-			  /*40*/ 0x04,0x6F,0x6F,0xD7,0xF7,0xFF,0x12,0xE0, // 2921000045014545 29
-			  /*41*/ 0x02,0x66,0x66,0xF4,0xF7,0xFF,0x12,0xE0, // 0C2A000045014545 2A
-			  /*42*/ 0x00,0x61,0x65,0xFD,0xF7,0xFF,0x12,0xE0, // 032B000045014545 2B
-			  /*43*/ 0x00,0x62,0x64,0xFE,0xF7,0xFF,0x12,0xE0, // 022C000045014545 2C
-			  /*44*/ 0x01,0x65,0x62,0xFE,0xF7,0xFF,0x12,0xE0, // 022E000045014545 2E
-			  /*45*/ 0x02,0x67,0x61,0xFD,0xF7,0xFF,0x12,0xE0, // 032F000045014545 2F
-			  /*46*/ 0x00,0x5F,0x5B,0x13,0xF7,0xFF,0x12,0xE0, // 6D35000045014545 35
-			  /*47*/ 0x00,0x44,0x4E,0x48,0xF7,0xFF,0x12,0xE0, // 3842000045014545 38
-			  /*48*/ 0x00,0x53,0x57,0x27,0xF7,0xFF,0x12,0xE0, // 5939000045014545 39
-			  /*49*/ 0x00,0x49,0x4D,0x45,0xF7,0xFF,0x12,0xE0, // 3B43000045014545 3B
-			  /*50*/ 0x01,0x49,0x4E,0x42,0xF7,0xFF,0x12,0xE0, // 3E42000045014545 3E
-			  /*51*/ 0x02,0x4B,0x4D,0x41,0xF7,0xFF,0x12,0xE0, // 3F43000045014545 3F
-			  /*52*/ 0x02,0x4E,0x4E,0x3C,0xF7,0xFF,0x12,0xE0, // 4442000045014545 44
-			  /*53*/ 0x05,0x4D,0x4E,0x3A,0xF7,0xFF,0x12,0xE0, // 4642000045014545 46
-			  /*54*/ 0x06,0x4F,0x4D,0x39,0xF7,0xFF,0x12,0xE0, // 4743000045014545 47
-			  /*55*/ 0x01,0x77,0x7C,0xB8,0xF7,0xFF,0x12,0xE0, // 4814000045014545 48
-			  /*56*/ 0x04,0x4F,0x4F,0x37,0xF7,0xFF,0x12,0xE0, // 4941000045014545 49
-			  /*57*/ 0x00,0x7A,0x7C,0xB6,0xF7,0xFF,0x12,0xE0, // 4A14000045014545 4A
-			  /*58*/ 0x00,0x41,0x45,0x5D,0xF7,0xFF,0x12,0xE0, // 234B000045014545 4B
-			  /*59*/ 0x00,0x42,0x44,0x5E,0xF7,0xFF,0x12,0xE0, // 224C000045014545 4C
-			  /*60*/ 0x01,0x45,0x42,0x5E,0xF7,0xFF,0x12,0xE0, // 224E000045014545 4E
-			  /*61*/ 0x02,0x47,0x41,0x5D,0xF7,0xFF,0x12,0xE0, // 234F000045014545 4F
-			  /*62*/ 0x04,0x7E,0x7C,0xAE,0xF7,0xFF,0x12,0xE0, // 5214000045014545 52
-			  /*63*/ 0x00,0x57,0x53,0x2B,0xF7,0xFF,0x12,0xE0, // 553D000045014545 55
-			  };
-		memcpy(c.d.asBytes, csns1, sizeof(c.d.asBytes));
+static int ReadBlock(uint8_t *KEY, uint8_t blockno, uint8_t keyType, bool elite, bool rawkey, 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};
 
-		SendCommand(&c);
-		if (!WaitForResponseTimeout(CMD_ACK, &resp, -1)) {
-			PrintAndLog("Command timed out");
+	if (auth) {
+		if (!select_and_auth(KEY, MAC, div_key, (keyType==0x18), elite, rawkey, verbose))
+			return 0;
+	} else {
+		uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+		uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+		if (!select_only(CSN, CCNR, (keyType==0x18), verbose))
 			return 0;
+	}
+
+	UsbCommand resp;
+	UsbCommand w = {CMD_ICLASS_READBLOCK, {blockno}};
+	clearCommandBuffer();
+	SendCommand(&w);
+	if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
+	{
+		PrintAndLog("Command execute timeout");
+		return 0;
+	}
+	uint8_t isOK = resp.arg[0] & 0xff;
+	if (!isOK) {
+		PrintAndLog("Read Block Failed");
+		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;
+}
+
+int usage_hf_iclass_readblock(void) {
+	PrintAndLog("Usage:  hf iclass readblk b <Block> k <Key> c e|r\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("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");
+	return 0;
+}
+
+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 errors = false;
+	bool auth = false;
+	uint8_t cmdp = 0;
+	while(param_getchar(Cmd, cmdp) != 0x00)
+	{
+		switch(param_getchar(Cmd, cmdp))
+		{
+		case 'h':
+		case 'H':
+			return usage_hf_iclass_readblock();
+		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: Credit KeyNbr is invalid\n");
+					errors = true;
+				}
+			} else {
+				PrintAndLog("\nERROR: Credit Key is incorrect length\n");
+				errors = true;
+			}
+			cmdp += 2;
+			break;
+		case 'r':
+		case 'R':
+			rawkey = true;
+			cmdp++;
+			break;
+		default:
+			PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+			errors = true;
+			break;
 		}
+		if(errors) return usage_hf_iclass_readblock();
+	}
 
-		uint8_t num_mac_responses_1  = resp.arg[1];
-		PrintAndLog("Mac responses, first part : %d MACs obtained (should be 63)", num_mac_responses_1);
-
-		UsbCommand c2 = {CMD_SIMULATE_TAG_ICLASS, {simType,63}};
-		UsbCommand resp2 = {0};
-
-		uint8_t csns2[] ={
-			/*64*/ 0x04,0x3C,0x3A,0x74,0xF7,0xFF,0x12,0xE0, // 0C56000045014545 56
-			/*65*/ 0x00,0x24,0x2E,0xA8,0xF7,0xFF,0x12,0xE0, // 5862000045014545 58
-			/*66*/ 0x00,0x29,0x2D,0xA5,0xF7,0xFF,0x12,0xE0, // 5B63000045014545 5B
-			/*67*/ 0x00,0x00,0x02,0x24,0xF7,0xFF,0x12,0xE0, // 5C0E000045014545 5C
-			/*68*/ 0x01,0x29,0x2E,0xA2,0xF7,0xFF,0x12,0xE0, // 5E62000045014545 5E
-			/*69*/ 0x02,0x2B,0x2D,0xA1,0xF7,0xFF,0x12,0xE0, // 5F63000045014545 5F
-			/*70*/ 0x02,0x2E,0x2E,0x9C,0xF7,0xFF,0x12,0xE0, // 6462000045014545 64
-			/*71*/ 0x02,0x0A,0x02,0x18,0xF7,0xFF,0x12,0xE0, // 680E000045014545 68
-			/*72*/ 0x00,0x03,0x07,0x17,0xF7,0xFF,0x12,0xE0, // 6909000045014545 69
-			/*73*/ 0x00,0x21,0x25,0xBD,0xF7,0xFF,0x12,0xE0, // 436B000045014545 6B
-			/*74*/ 0x02,0x27,0x21,0xBD,0xF7,0xFF,0x12,0xE0, // 436F000045014545 6F
-			/*75*/ 0x04,0x07,0x07,0x0F,0xF7,0xFF,0x12,0xE0, // 7109000045014545 71
-			/*76*/ 0x00,0x04,0x0E,0x08,0xF7,0xFF,0x12,0xE0, // 7802000045014545 78
-			/*77*/ 0x00,0x33,0x37,0x87,0xF7,0xFF,0x12,0xE0, // 7959000045014545 79
-			/*78*/ 0x00,0x09,0x0D,0x05,0xF7,0xFF,0x12,0xE0, // 7B03000045014545 7B
-			/*79*/ 0x01,0x09,0x0E,0x02,0xF7,0xFF,0x12,0xE0, // 7E02000045014545 7E
-			/*80*/ 0x02,0x0B,0x0D,0x01,0xF7,0xFF,0x12,0xE0, // 7F03000045014545 7F
-			/*81*/ 0x00,0x34,0x3E,0x78,0xF7,0xFF,0x12,0xE0, // 0852000045014545 08
-			/*82*/ 0x04,0x66,0x64,0xF6,0xF7,0xFF,0x12,0xE0, // 0A2C000045014545 0A
-			/*83*/ 0x00,0x3F,0x3B,0x73,0xF7,0xFF,0x12,0xE0, // 0D55000045014545 0D
-			/*84*/ 0x03,0x3B,0x3E,0x6E,0xF7,0xFF,0x12,0xE0, // 1252000045014545 12
-			/*85*/ 0x00,0x11,0x15,0xED,0xF7,0xFF,0x12,0xE0, // 137B000045014545 13
-			/*86*/ 0x00,0x6E,0x68,0xEA,0xF7,0xFF,0x12,0xE0, // 1628000045014545 16
-			/*87*/ 0x00,0x6D,0x69,0xE9,0xF7,0xFF,0x12,0xE0, // 1727000045014545 17
-			/*88*/ 0x00,0x6A,0x6C,0xE6,0xF7,0xFF,0x12,0xE0, // 1A24000045014545 1A
-			/*89*/ 0x00,0x40,0x42,0x64,0xF7,0xFF,0x12,0xE0, // 1C4E000045014545 1C
-			/*90*/ 0x00,0x77,0x73,0xCB,0xF7,0xFF,0x12,0xE0, // 351D000045014545 1D
-			/*91*/ 0x06,0x6E,0x72,0xD0,0xF7,0xFF,0x12,0xE0, // 301E000045014545 30
-			/*92*/ 0x00,0x1B,0x1F,0xCF,0xF7,0xFF,0x12,0xE0, // 3171000045014545 31
-			/*93*/ 0x01,0x75,0x72,0xCE,0xF7,0xFF,0x12,0xE0, // 321E000045014545 32
-			/*94*/ 0x00,0x71,0x75,0xCD,0xF7,0xFF,0x12,0xE0, // 331B000045014545 33
-			/*95*/ 0x00,0x48,0x4A,0x4C,0xF7,0xFF,0x12,0xE0, // 3446000045014545 34
-			/*96*/ 0x00,0x4E,0x48,0x4A,0xF7,0xFF,0x12,0xE0, // 3648000045014545 36
-			/*97*/ 0x00,0x4D,0x49,0x49,0xF7,0xFF,0x12,0xE0, // 3747000045014545 37
-			/*98*/ 0x00,0x4A,0x4C,0x46,0xF7,0xFF,0x12,0xE0, // 3A44000045014545 3A
-			/*99*/ 0x00,0x20,0x22,0xC4,0xF7,0xFF,0x12,0xE0, // 3C6E000045014545 3C
-			/*100*/ 0x00,0x1C,0x66,0x40,0xF7,0xFF,0x12,0xE0, // 402A000045014545 40
-			/*101*/ 0x06,0x4E,0x52,0x30,0xF7,0xFF,0x12,0xE0, // 503E000045014545 50
-			/*102*/ 0x00,0x7B,0x7F,0xAF,0xF7,0xFF,0x12,0xE0, // 5111000045014545 51
-			/*103*/ 0x00,0x51,0x55,0x2D,0xF7,0xFF,0x12,0xE0, // 533B000045014545 53
-			/*104*/ 0x00,0x28,0x2A,0xAC,0xF7,0xFF,0x12,0xE0, // 5466000045014545 54
-			/*105*/ 0x02,0x53,0x55,0x29,0xF7,0xFF,0x12,0xE0, // 573B000045014545 57
-			/*106*/ 0x00,0x2A,0x2C,0xA6,0xF7,0xFF,0x12,0xE0, // 5A64000045014545 5A
-			/*107*/ 0x00,0x7C,0x46,0x20,0xF7,0xFF,0x12,0xE0, // 604A000045014545 60
-			/*108*/ 0x02,0x03,0x05,0x19,0xF7,0xFF,0x12,0xE0, // 670B000045014545 67
-			/*109*/ 0x01,0x2F,0x34,0x90,0xF7,0xFF,0x12,0xE0, // 705C000045014545 70
-			/*110*/ 0x00,0x32,0x34,0x8E,0xF7,0xFF,0x12,0xE0, // 725C000045014545 72
-			/*111*/ 0x00,0x31,0x35,0x8D,0xF7,0xFF,0x12,0xE0, // 735B000045014545 73
-			/*112*/ 0x00,0x08,0x0A,0x0C,0xF7,0xFF,0x12,0xE0, // 7406000045014545 74
-			/*113*/ 0x03,0x37,0x32,0x8A,0xF7,0xFF,0x12,0xE0, // 765E000045014545 76
-			/*114*/ 0x00,0x0D,0x09,0x09,0xF7,0xFF,0x12,0xE0, // 7707000045014545 77
-			/*115*/ 0x00,0x0A,0x0C,0x06,0xF7,0xFF,0x12,0xE0, // 7A04000045014545 7A
-			/*116*/ 0x00,0x60,0x62,0x04,0xF7,0xFF,0x12,0xE0, // 7C2E000045014545 7C
-			/*117*/ 0x00,0x07,0x03,0x1B,0xF7,0xFF,0x12,0xE0, // 650D000045014545 65
-			/*118*/ 0x00,0x0C,0x16,0xF0,0xF7,0xFF,0x12,0xE0, // 107A000045014545 10
-			/*119*/ 0x00,0x6F,0x6B,0xE3,0xF7,0xFF,0x12,0xE0, // 1D25000045014545 25
-			/*120*/ 0x00,0x2F,0x2B,0xA3,0xF7,0xFF,0x12,0xE0, // 5D65000045014545 5D
-			/*121*/ 0x00,0x47,0x43,0x5B,0xF7,0xFF,0x12,0xE0, // 254D000045014545 4D
-			/*122*/ 0x00,0x37,0x33,0x8B,0xF7,0xFF,0x12,0xE0, // 755D000045014545 75
-			/*123*/ 0x00,0x1F,0x1B,0xD3,0xF7,0xFF,0x12,0xE0, // 2D75000045014545 2D
-			/*124*/ 0x00,0x67,0x63,0xFB,0xF7,0xFF,0x12,0xE0, // 052D000045014545 05
-			/*125*/ 0x00,0x0F,0x0B,0x03,0xF7,0xFF,0x12,0xE0, // 7D05000045014545 7D
-			/*126*/ 0x00,0x17,0x13,0xEB,0xF7,0xFF,0x12,0xE0, // 157D000045014545 15
-		};
-
-		memcpy(c2.d.asBytes, csns2, sizeof(c2.d.asBytes));
+	if (cmdp < 2) return usage_hf_iclass_readblock();
+	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, true, auth);
+}
 
-		SendCommand(&c);
-		if (!WaitForResponseTimeout(CMD_ACK, &resp2, -1)) {
-			PrintAndLog("Command timed out");
-			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 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");
 		}
-		uint8_t num_mac_responses_2  = resp2.arg[1];
-		PrintAndLog("Mac responses, second part : %d MACs obtained (should be 63)", num_mac_responses_2);
-		size_t datalen = 126 * 16;
-		/*
-		 * Now, time to dump to file. We'll use this format:
-		 * <8-byte CSN><8-byte MAC>....
-		 * So, it should wind up as
-		 * (63+63) * (8 + 8 ) bytes.
-		 **/
-		void* macs = malloc(datalen);
-		uint8_t i = 0;
-		while(i < 63)
+	}
+	else if(opt == 't')
+	{
+		int errors = testCipherUtils();
+		errors += testMAC();
+		errors += doKeyTests(0);
+		errors += testElite();
+		if(errors)
 		{
-			memcpy(macs+i*16, csns1+i*8,8);
-			memcpy(macs+i*16+8, resp.d.asBytes+i*8,8);
-
-			memcpy(macs+i*16+63*16, csns2+i*8,8);
-			memcpy(macs+i*16+8+63*16, resp2.d.asBytes+i*8,8);
-			i++;
+			prnlog("OBS! There were errors!!!");
 		}
-		/** Now, save to dumpfile **/
-		saveFile("iclass_mac_attack", "bin", macs,datalen);
-		free(macs);
-	}else
+		return errors;
+	}
+
+	return 0;
+}
+
+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");
+}
+
+int usage_hf_iclass_readtagfile() {
+	PrintAndLog("Usage: hf iclass readtagfile <filename> [startblock] [endblock]");
+	return 1;
+}
+
+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)
+		return usage_hf_iclass_readtagfile();
+	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;
+}
+*/
+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;
+
+		//Permute from iclass format to standard format
+		permutekey_rev(key_sel, key_sel_p);
+		diversifyKey(CSN, key_sel_p, div_key);	
+	} else {
+		diversifyKey(CSN, KEY, div_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));		
+	}
+}
+
+int 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");
+
+	return 1;
+}
+
+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 CCNR[12] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+	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)
 	{
-		UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
-		memcpy(c.d.asBytes, CSN, 8);
-		SendCommand(&c);
+		switch(param_getchar(Cmd, cmdp))
+		{
+		case 'h':
+		case 'H':
+			return usage_hf_iclass_calc_newkey();
+		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))
+				return usage_hf_iclass_calc_newkey();
+			cmdp += 2;
+			break;
+		default:
+			PrintAndLog("Unknown parameter '%c'\n", param_getchar(Cmd, cmdp));
+			errors = true;
+			break;
+		}
+		if(errors) return usage_hf_iclass_calc_newkey();
 	}
-  return 0;
+
+	if (cmdp < 4) return usage_hf_iclass_calc_newkey();
+
+	if (!givenCSN)
+		if (!select_only(CSN, CCNR, false, true))
+			return 0;
+	
+	HFiClassCalcNewKey(CSN, OLDKEY, NEWKEY, xor_div_key, elite, oldElite, true);
+	return 0;
 }
 
-int CmdHFiClassReader(const char *Cmd)
-{
-  uint8_t readerType = 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;
+}
 
-  if (strlen(Cmd)<1) {
-	PrintAndLog("Usage:  hf iclass reader    <reader type>");
-	PrintAndLog("        sample: hf iclass reader 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;
-  }	
+}
 
-  readerType = param_get8(Cmd, 0);
-  PrintAndLog("--readertype:%02x", readerType);
+int 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");
+	return 0;
+}
 
-  UsbCommand c = {CMD_READER_ICLASS, {readerType}};
-  //memcpy(c.d.asBytes, CSN, 8);
-  SendCommand(&c);
+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':
+			return usage_hf_iclass_managekeys();
+		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) return usage_hf_iclass_managekeys();
+	}
+	if (operation == 0){
+		PrintAndLog("no operation specified (load, save, or print)\n");
+		return usage_hf_iclass_managekeys();
+	}
+	if (operation > 6){
+		PrintAndLog("Too many operations specified\n");
+		return usage_hf_iclass_managekeys();
+	}
+	if (operation > 4 && fileNameLen == 0){
+		PrintAndLog("You must enter a filename when loading or saving\n");
+		return usage_hf_iclass_managekeys();
+	}
 
-  /*UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500);
-  if (resp != NULL) {
-	uint8_t                isOK  = resp->arg[0] & 0xff;
-	PrintAndLog("isOk:%02x", isOK);
-  } else {
-	PrintAndLog("Command execute timeout");
-  }*/
+	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;
+}
 
-  return 0;
+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':
+			return usage_hf_iclass_chk();
+		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) return usage_hf_iclass_chk();	
+			
+	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();
+				
+	for (uint32_t c = 0; c < keycnt; c += 1) {
+			printf("."); fflush(stdout);			
+			if (ukbhit()) {
+				int gc = getchar(); (void)gc;
+				printf("\naborted via keyboard!\n");
+				break;
+			}
+			
+			memcpy(key, keyBlock + 8 * c , 8); 
+
+			// debit key. try twice
+			for (int foo = 0; foo < 2 && !found_debit; foo++) {
+				if (!select_and_auth(key, mac, div_key, false, use_elite, use_raw, false))
+					continue;
+
+				// key found.
+				PrintAndLog("\n--------------------------------------------------------");
+			PrintAndLog("   Found AA1 debit key\t\t[%s]", sprint_hex(key, 8));
+				found_debit = true;
+			}
+			
+			// credit key. try twice
+			for (int foo = 0; foo < 2 && !found_credit; foo++) {
+				if (!select_and_auth(key, mac, div_key, true, use_elite, use_raw, 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 command_t CommandTable[] = 
 {
-  {"help",    CmdHelp,        1, "This help"},
-  {"list",    CmdHFiClassList,   0, "List iClass history"},
-  {"snoop",   CmdHFiClassSnoop,  0, "Eavesdrop iClass communication"},
-  {"sim",     CmdHFiClassSim,    0, "Simulate iClass tag"},
-  {"reader",  CmdHFiClassReader, 0, "Read an iClass tag"},
-  {NULL, NULL, 0, NULL}
+	{"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"},
+	{"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"},
+	{"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"},
+	{"replay",      CmdHFiClassReader_Replay,   	0,	"<mac>       Read an iClass tag via Reply Attack"},
+	{"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)
 {
-  CmdsParse(CommandTable, Cmd);
-  return 0;
+	clearCommandBuffer();	
+	CmdsParse(CommandTable, Cmd);
+	return 0;
 }
 
 int CmdHelp(const char *Cmd)
 {
-  CmdsHelp(CommandTable);
-  return 0;
-}
-
-/**
- * @brief checks if a file exists
- * @param filename
- * @return
- */
-int fileExists(const char *filename) {
-	struct stat st;
-	int result = stat(filename, &st);
-	return result == 0;
-}
-/**
- * @brief Utility function to save data to a file. This method takes a preferred name, but if that
- * file already exists, it tries with another name until it finds something suitable.
- * E.g. dumpdata-15.txt
- * @param preferredName
- * @param suffix the file suffix. Leave out the ".".
- * @param data The binary data to write to the file
- * @param datalen the length of the data
- * @return
- */
-int saveFile(const char *preferredName, const char *suffix, const void* data, size_t datalen)
-{
-	FILE *f = fopen(preferredName, "wb");
-	int size = sizeof(char) * (strlen(preferredName)+strlen(suffix)+5);
-	char * fileName = malloc(size);
-
-	memset(fileName,0,size);
-	int num = 1;
-	sprintf(fileName,"%s.%s", preferredName, suffix);
-	while(fileExists(fileName))
-	{
-		sprintf(fileName,"%s-%d.%s", preferredName, num, suffix);
-		num++;
-	}
-	/* We should have a valid filename now, e.g. dumpdata-3.bin */
-
-	/*Opening file for writing in binary mode*/
-	FILE *fileHandle=fopen(fileName,"wb");
-	if(!f) {
-		PrintAndLog("Failed to write to file '%s'", fileName);
-		return 0;
-	}
-	fwrite(data, 1,	datalen, fileHandle);
-	fclose(fileHandle);
-	PrintAndLog("Saved data to '%s'", fileName);
-
-	free(fileName);
+	CmdsHelp(CommandTable);
 	return 0;
 }