X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/17cba2693d87d80b98a20ad8c2774155fa55d3fa..5ebdce44c014ae29d688367508d0a6f6e6ebc673:/client/cmdhficlass.c

diff --git a/client/cmdhficlass.c b/client/cmdhficlass.c
index 9f6842b8..824aaa36 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
@@ -12,9 +13,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/stat.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 "ui.h"
 #include "cmdparser.h"
@@ -22,6 +23,14 @@
 #include "common.h"
 #include "util.h"
 #include "cmdmain.h"
+#include "loclass/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"
 
 static int CmdHelp(const char *Cmd);
 
@@ -36,409 +45,668 @@ int xorbits_8(uint8_t val)
 
 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()
+{
+	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;
+		}
+
+		uint8_t num_mac_responses  = resp.arg[1];
+		PrintAndLog("Mac responses: %d MACs obtained (should be %d)", num_mac_responses,NUM_CSNS);
+
+		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_CONF|FLAG_ICLASS_READER_AA}};
+	if (!loop) c.arg[0] |= FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_ONE_TRY;
+	SendCommand(&c);
+	UsbCommand resp;
+	while(!ukbhit()){
+		if (WaitForResponseTimeout(CMD_ACK,&resp, 4500)) {
+			uint8_t readStatus = resp.arg[0] & 0xff;
+			uint8_t *data = resp.d.asBytes;
+
+			if (verbose)
+				PrintAndLog("Readstatus:%02x", readStatus);
+			if( readStatus == 0){
+				//Aborted
+				if (verbose) PrintAndLog("Quitting...");
+				return 0;
+			}
+			if( readStatus & FLAG_ICLASS_READER_CSN){
+				PrintAndLog("CSN: %s",sprint_hex(data,8));
+				tagFound = true;
+			}
+			if( readStatus & FLAG_ICLASS_READER_CC)  PrintAndLog("CC: %s",sprint_hex(data+16,8));
+			if( readStatus & FLAG_ICLASS_READER_CONF){
+				printIclassDumpInfo(data);
+			}
+			if (tagFound && !loop) return 1;
+		} else {
+			if (verbose) PrintAndLog("Command execute timeout");
+		}
+		if (!loop) break;
+	}
+	return 0;
+
+}
 
-	bool ShowWaitCycles = false;
-	char param = param_getchar(Cmd, 0);
+int CmdHFiClassReader(const char *Cmd)
+{
+	return HFiClassReader(Cmd, true, true);
+}
 
-	if (param != 0) {
-		PrintAndLog("List data in trace buffer.");
-		PrintAndLog("Usage:  hf iclass list");
-		PrintAndLog("h - help");
-		PrintAndLog("sample: hf iclass list");
+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)");
-	PrintAndLog("");
-	PrintAndLog("     Start |       End | Src | Data");
-	PrintAndLog("-----------|-----------|-----|--------");
+	UsbCommand c = {CMD_READER_ICLASS_REPLAY, {readerType}};
+	memcpy(c.d.asBytes, MAC, 4);
+	SendCommand(&c);
+
+	return 0;
+}
 
+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;
-	uint32_t first_timestamp = 0;
-	uint32_t timestamp;
-	bool tagToReader;
-	uint32_t parityBits;
-	uint8_t len;
-	uint8_t *frame;
-	uint32_t EndOfTransmissionTimestamp = 0;
+	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");
+
 
-	uint8_t empty[4] = {0x44,0x44,0x44,0x44};
+		return 0;
+	}
 
-	for( i=0; i < 1900;)
+	if (param_gethex(Cmd, 0, KEY, 16))
 	{
-		//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;
-		}
+		PrintAndLog("KEY must include 16 HEX symbols");
+		return 1;
+	}
 
-		// Break and stick with current result if buffer
-		// was not completely full
-		if(memcmp(frame,empty,sizeof(empty))) break;
+	if (param_getchar(Cmd, 1) == 'e')
+	{
+		PrintAndLog("Elite switch on");
+		elite = 1;
 
-		char line[1000] = "";
+		//calc h2
+		hash2(KEY, keytable);
+		printarr_human_readable("keytable", keytable, 128);
 
-		if(len)//We have some data to display
-		{
-			int j,oddparity;
+	}
 
-			for(j = 0; j < len ; j++)
-			{
-				oddparity = 0x01 ^ xorbits_8(frame[j] & 0xFF);
+	UsbCommand resp;
+	uint8_t key_sel[8] = {0};
+	uint8_t key_sel_p[8] = { 0 };
 
-				if (tagToReader && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
-					sprintf(line+(j*4), "%02x!  ", frame[j]);
-				} else {
-					sprintf(line+(j*4), "%02x   ", frame[j]);
-				}
-			}
-		}else
+	UsbCommand c = {CMD_READER_ICLASS, {0}};
+	c.arg[0] = FLAG_ICLASS_READER_ONLY_ONCE| FLAG_ICLASS_READER_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+16,8);
+
+	PrintAndLog("isOk:%02x", isOK);
+
+	if(isOK > 0)
+	{
+		PrintAndLog("CSN: %s",sprint_hex(CSN,8));
+	}
+	if(isOK <= 1){
+		PrintAndLog("Failed to obtain CC! Aborting");
+		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))
 		{
-			if (ShowWaitCycles) {
-				sprintf(line, "fdt (Frame Delay Time): %d", (next_timestamp - timestamp));
+			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+iclass_datalen, 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;
 			}
 		}
+	}
 
-		char *crc = "";
 
-		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);
-			}
-			else {
-				  // For other data.. CRC might not be applicable (UPDATE commands etc.)
-				ComputeCrc14443(CRC_ICLASS, frame, len-2, &b1, &b2);
-			}
+	return 0;
+}
 
-			if (b1 != frame[len-2] || b2 != frame[len-1]) {
-				crc = (tagToReader & (len < 8)) ? "" : " !crc";
-			}
-		}
+int hf_iclass_eload_usage()
+{
+	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;
 
-		i += (len + 9);
-		EndOfTransmissionTimestamp = (*((uint32_t *)(got+i))) & 0x7fffffff;
+}
 
-		// Not implemented for iclass on the ARM-side
-		//if (!ShowWaitCycles) i += 9;
+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)
+{
+
+	char opt = param_getchar(Cmd, 0);
+	if (strlen(Cmd)<1 || opt == 'h')
+		return hf_iclass_eload_usage();
+
+	//File handling and reading
+	FILE *f;
+	char filename[FILE_PATH_SIZE];
+	if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0)
+	{
+		f = fopen(filename, "rb");
+	}else{
+		return hf_iclass_eload_usage();
+	}
 
-		PrintAndLog(" %9d | %9d | %s | %s %s",
-			(timestamp - first_timestamp),
-			(EndOfTransmissionTimestamp - first_timestamp),
-			(len?(tagToReader ? "Tag" : "Rdr"):"   "),
-			line, crc);
+	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);
+
+	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;
 }
 
-int CmdHFiClassListOld(const char *Cmd)
+int usage_hf_iclass_decrypt()
 {
-  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;
+	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;
 }
 
-/*void iso14a_set_timeout(uint32_t timeout) {
-	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_SET_TIMEOUT, 0, timeout}};
-	SendCommand(&c);
-}*/
-
-int CmdHFiClassSnoop(const char *Cmd)
+int readKeyfile(const char *filename, size_t len, uint8_t* buffer)
 {
-  UsbCommand c = {CMD_SNOOP_ICLASS};
-  SendCommand(&c);
-  return 0;
+	FILE *f = fopen(filename, "rb");
+	if(!f) {
+		PrintAndLog("Failed to read from file '%s'", filename);
+		return 1;
+	}
+	fseek(f, 0, SEEK_END);
+	long fsize = ftell(f);
+	fseek(f, 0, SEEK_SET);
+	size_t bytes_read = fread(buffer, 1, len, f);
+	fclose(f);
+	if(fsize != len)
+	{
+		PrintAndLog("Warning, file size is %d, expected %d", fsize, len);
+		return 1;
+	}
+	if(bytes_read != len)
+	{
+		PrintAndLog("Warning, could only read %d bytes, expected %d" ,bytes_read, len);
+		return 1;
+	}
+	return 0;
 }
 
-int CmdHFiClassSim(const char *Cmd)
+int CmdHFiClassDecrypt(const char *Cmd)
 {
-  uint8_t simType = 0;
-  uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+	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) > 0)
+	{
+		f = fopen(filename, "rb");
+	}else{
+		return usage_hf_iclass_decrypt();
+	}
 
-  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 > 2)
-  {
-	  PrintAndLog("Undefined simptype %d", simType);
-	  return 1;
-  }
-  uint8_t numberOfCSNs=0;
-
-  UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
-  memcpy(c.d.asBytes, CSN, 8);
-
-  if(simType == 2)
-  {
-	  c.arg[1] = 10;//10 CSNs
-	  uint8_t csns[] ={
-			  /* 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
-			};
-	  memcpy(c.d.asBytes, csns, sizeof(c.d.asBytes));
-
-  }
-
-  SendCommand(&c);
-
-  /*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");
-  }*/
+	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);
+	des3_context ctx = { DES_DECRYPT ,{ 0 } };
+	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)
+		{
+			memcpy(decrypted+(blocknum*8), enc_dump, 8);
+		}else{
+			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);
+
+	saveFile(outfilename,"bin", decrypted, blocknum*8);
 
-  return 0;
+	return 0;
 }
 
-int CmdHFiClassReader(const char *Cmd)
+int CmdHFiClass_iso14443A_write(const char *Cmd)
 {
-  uint8_t readerType = 0;
+	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};
 
-  if (strlen(Cmd)<1) {
-	PrintAndLog("Usage:  hf iclass reader    <reader type>");
-	PrintAndLog("        sample: hf iclass reader 0");
-	return 0;
-  }	
+	uint8_t blockNo=0;
+	uint8_t bldata[8]={0};
+
+	if (strlen(Cmd)<3)
+	{
+		PrintAndLog("Usage:  hf iclass write <Key> <Block> <Data>");
+		PrintAndLog("        sample: hf iclass write 0011223344556677 10 AAAAAAAAAAAAAAAA");
+		return 0;
+	}
 
-  readerType = param_get8(Cmd, 0);
-  PrintAndLog("--readertype:%02x", readerType);
+	if (param_gethex(Cmd, 0, KEY, 16))
+	{
+		PrintAndLog("KEY must include 16 HEX symbols");
+		return 1;
+	}
 
-  UsbCommand c = {CMD_READER_ICLASS, {readerType}};
-  //memcpy(c.d.asBytes, CSN, 8);
-  SendCommand(&c);
+	blockNo = param_get8(Cmd, 1);
+	if (blockNo>32)
+	{
+		PrintAndLog("Error: Maximum number of blocks is 32 for iClass 2K Cards!");
+		return 1;
+	}
+	if (param_gethex(Cmd, 2, bldata, 8))
+	{
+		PrintAndLog("Block data must include 8 HEX symbols");
+		return 1;
+	}
 
-  /*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");
-  }*/
+	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;
+
+		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 {
+		PrintAndLog("Command execute timeout");
+	}
 
-  return 0;
+	diversifyKey(CSN,KEY, div_key);
+
+	PrintAndLog("Div Key: %s",sprint_hex(div_key,8));
+	doMAC(CCNR, div_key, MAC);
+
+	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;
+
+		if (isOK)
+			PrintAndLog("isOk:%02x data:%s", isOK, sprint_hex(data, 4));
+		else
+			PrintAndLog("isOk:%02x", isOK);
+	} else {
+		PrintAndLog("Command execute timeout");
+	}
+	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");
+		}
+	}
+	else if(opt == 't')
+	{
+		int errors = testCipherUtils();
+		errors += testMAC();
+		errors += doKeyTests(0);
+		errors += testElite();
+		if(errors)
+		{
+			prnlog("OBS! There were errors!!!");
+		}
+		return errors;
+	}
+
+	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"},
+	{"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" },
+	{NULL, NULL, 0, NULL}
 };
 
 int CmdHFiClass(const char *Cmd)
 {
-  CmdsParse(CommandTable, Cmd);
-  return 0;
+	CmdsParse(CommandTable, Cmd);
+	return 0;
 }
 
 int CmdHelp(const char *Cmd)
 {
-  CmdsHelp(CommandTable);
-  return 0;
+	CmdsHelp(CommandTable);
+	return 0;
 }