X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/79d7bcbb51db25dab899b3b250f48a0ab40e30e9..e6158a48ecc4dbd344604fcb562315931c68d2ff:/armsrc/mifarecmd.c

diff --git a/armsrc/mifarecmd.c b/armsrc/mifarecmd.c
index 2a21ac48..15db8f11 100644
--- a/armsrc/mifarecmd.c
+++ b/armsrc/mifarecmd.c
@@ -14,28 +14,61 @@
 //-----------------------------------------------------------------------------
 
 #include "mifarecmd.h"
+
+#include <stdint.h>
+
+#include "proxmark3.h"
+#include "usb_cdc.h"
+#include "crapto1/crapto1.h"
+#include "iso14443a.h"
+#include "BigBuf.h"
+#include "mifareutil.h"
 #include "apps.h"
+#include "protocols.h"
 #include "util.h"
+#include "parity.h"
 #include "crc.h"
+#include "fpgaloader.h"
 
+#define HARDNESTED_AUTHENTICATION_TIMEOUT 848           // card times out 1ms after wrong authentication (according to NXP documentation)
+#define HARDNESTED_PRE_AUTHENTICATION_LEADTIME 400      // some (non standard) cards need a pause after select before they are ready for first authentication
+
+/*
 // the block number for the ISO14443-4 PCB
-uint8_t pcb_blocknum = 0;
+static uint8_t pcb_blocknum = 0;
 // Deselect card by sending a s-block. the crc is precalced for speed
 static  uint8_t deselect_cmd[] = {0xc2,0xe0,0xb4};
 
+static void OnSuccess(){
+	pcb_blocknum = 0;
+	ReaderTransmit(deselect_cmd, 3 , NULL);
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	LEDsoff();
+}
+*/
+
+static void OnError(uint8_t reason){
+	// pcb_blocknum = 0;
+	// ReaderTransmit(deselect_cmd, 3 , NULL);
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	LED_D_OFF();
+	cmd_send(CMD_ACK,0,reason,0,0,0);
+	LED_A_OFF();
+}
+
 //-----------------------------------------------------------------------------
-// Select, Authenticate, Read a MIFARE tag. 
+// Select, Authenticate, Read a MIFARE tag.
 // read block
 //-----------------------------------------------------------------------------
 void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 {
-  // params
+	LED_A_ON();
+
 	uint8_t blockNo = arg0;
 	uint8_t keyType = arg1;
 	uint64_t ui64Key = 0;
 	ui64Key = bytes_to_num(datain, 6);
-	
-	// variables
+
 	byte_t isOK = 0;
 	byte_t dataoutbuf[16];
 	uint8_t uid[10];
@@ -44,67 +77,63 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	struct Crypto1State *pcs;
 	pcs = &mpcs;
 
-	// clear trace
-	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	LED_A_ON();
-	LED_B_OFF();
-	LED_C_OFF();
+	clear_trace();
 
 	while (true) {
-		if(!iso14443a_select_card(uid, NULL, &cuid)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
+		if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 			break;
 		};
 
-		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Auth error");
+		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, NULL)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
 			break;
 		};
-		
+
 		if(mifare_classic_readblock(pcs, cuid, blockNo, dataoutbuf)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Read block error");
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Read block error");
 			break;
 		};
 
 		if(mifare_classic_halt(pcs, cuid)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
 			break;
 		};
-		
+
 		isOK = 1;
 		break;
 	}
-	
+
 	//  ----------------------------- crypto1 destroy
 	crypto1_destroy(pcs);
-	
-	if (MF_DBGLEVEL >= 2)	DbpString("READ BLOCK FINISHED");
+
+	if (MF_DBGLEVEL >= 2)   DbpString("READ BLOCK FINISHED");
+
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
 	LED_B_ON();
 	cmd_send(CMD_ACK,isOK,0,0,dataoutbuf,16);
 	LED_B_OFF();
 
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
 }
 
 void MifareUC_Auth(uint8_t arg0, uint8_t *keybytes){
 
+	LED_A_ON();
 	bool turnOffField = (arg0 == 1);
 
-	LED_A_ON(); LED_B_OFF(); LED_C_OFF();
-	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	if(!iso14443a_select_card(NULL, NULL, NULL)) {
+	if (!iso14443a_select_card(NULL, NULL, NULL, true, 0, true)) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");
 		OnError(0);
 		return;
 	};
-	
-	if(!mifare_ultra_auth(keybytes)){
+
+	if (!mifare_ultra_auth(keybytes)){
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication failed");
 		OnError(1);
 		return;
@@ -112,9 +141,11 @@ void MifareUC_Auth(uint8_t arg0, uint8_t *keybytes){
 
 	if (turnOffField) {
 		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-		LEDsoff();
+		LED_D_OFF();
 	}
+
 	cmd_send(CMD_ACK,1,0,0,0,0);
+	LED_A_OFF();
 }
 
 // Arg0 = BlockNo,
@@ -122,17 +153,16 @@ void MifareUC_Auth(uint8_t arg0, uint8_t *keybytes){
 // datain = PWD bytes,
 void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 {
+	LED_A_ON();
+
 	uint8_t blockNo = arg0;
 	byte_t dataout[16] = {0x00};
 	bool useKey = (arg1 == 1); //UL_C
 	bool usePwd = (arg1 == 2); //UL_EV1/NTAG
 
-	LEDsoff();
-	LED_A_ON();
-	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	int len = iso14443a_select_card(NULL, NULL, NULL);
+	int len = iso14443a_select_card(NULL, NULL, NULL, true, 0, true);
 	if(!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%02X)",len);
 		OnError(1);
@@ -140,7 +170,7 @@ void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 	}
 
 	// UL-C authentication
-	if ( useKey ) {
+	if (useKey) {
 		uint8_t key[16] = {0x00};
 		memcpy(key, datain, sizeof(key) );
 
@@ -151,7 +181,7 @@ void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 	}
 
 	// UL-EV1 / NTAG authentication
-	if ( usePwd ) {
+	if (usePwd) {
 		uint8_t pwd[4] = {0x00};
 		memcpy(pwd, datain, 4);
 		uint8_t pack[4] = {0,0,0,0};
@@ -159,27 +189,29 @@ void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 			OnError(1);
 			return;
 		}
-	}	
+	}
 
-	if( mifare_ultra_readblock(blockNo, dataout) ) {
+	if (mifare_ultra_readblock(blockNo, dataout)) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Read block error");
 		OnError(2);
 		return;
 	}
 
-	if( mifare_ultra_halt() ) {
+	if (mifare_ultra_halt()) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Halt error");
 		OnError(3);
 		return;
 	}
 
-	cmd_send(CMD_ACK,1,0,0,dataout,16);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();
+	LED_D_OFF();
+
+	cmd_send(CMD_ACK,1,0,0,dataout,16);
+	LED_A_OFF();
 }
 
 //-----------------------------------------------------------------------------
-// Select, Authenticate, Read a MIFARE tag. 
+// Select, Authenticate, Read a MIFARE tag.
 // read sector (data = 4 x 16 bytes = 64 bytes, or 16 x 16 bytes = 256 bytes)
 //-----------------------------------------------------------------------------
 void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
@@ -189,7 +221,7 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	uint8_t keyType = arg1;
 	uint64_t ui64Key = 0;
 	ui64Key = bytes_to_num(datain, 6);
-	
+
 	// variables
 	byte_t isOK = 0;
 	byte_t dataoutbuf[16 * 16];
@@ -199,50 +231,50 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	struct Crypto1State *pcs;
 	pcs = &mpcs;
 
-	// clear trace
-	clear_trace();
-
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
+	clear_trace();
+
 	LED_A_ON();
 	LED_B_OFF();
 	LED_C_OFF();
 
 	isOK = 1;
-	if(!iso14443a_select_card(uid, NULL, &cuid)) {
+	if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
 		isOK = 0;
-		if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
+		if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 	}
 
-	
-	if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST)) {
+
+	if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST, NULL)) {
 		isOK = 0;
-		if (MF_DBGLEVEL >= 1)	Dbprintf("Auth error");
+		if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
 	}
-	
+
 	for (uint8_t blockNo = 0; isOK && blockNo < NumBlocksPerSector(sectorNo); blockNo++) {
 		if(mifare_classic_readblock(pcs, cuid, FirstBlockOfSector(sectorNo) + blockNo, dataoutbuf + 16 * blockNo)) {
 			isOK = 0;
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Read sector %2d block %2d error", sectorNo, blockNo);
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Read sector %2d block %2d error", sectorNo, blockNo);
 			break;
 		}
 	}
-		
+
 	if(mifare_classic_halt(pcs, cuid)) {
-		if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
+		if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
 	}
 
 	//  ----------------------------- crypto1 destroy
 	crypto1_destroy(pcs);
-	
+
 	if (MF_DBGLEVEL >= 2) DbpString("READ SECTOR FINISHED");
 
+	// Thats it...
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
 	LED_B_ON();
 	cmd_send(CMD_ACK,isOK,0,0,dataoutbuf,16*NumBlocksPerSector(sectorNo));
 	LED_B_OFF();
 
-	// Thats it...
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
 }
 
@@ -252,10 +284,11 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 // datain = KEY bytes
 void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 {
+	LED_A_ON();
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
 	// free eventually allocated BigBuf memory
 	BigBuf_free();
-	// clear trace
-	clear_trace();
 
 	// params
 	uint8_t blockNo = arg0;
@@ -270,11 +303,7 @@ void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 		return;
 	}
 
-	LEDsoff();
-	LED_A_ON();
-	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
-
-	int len = iso14443a_select_card(NULL, NULL, NULL);
+	int len = iso14443a_select_card(NULL, NULL, NULL, true, 0, true);
 	if (!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%d)",len);
 		OnError(1);
@@ -282,7 +311,7 @@ void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 	}
 
 	// UL-C authentication
-	if ( useKey ) {
+	if (useKey) {
 		uint8_t key[16] = {0x00};
 		memcpy(key, datain, sizeof(key) );
 
@@ -300,16 +329,16 @@ void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 
 		if (!mifare_ul_ev1_auth(pwd, pack)){
 			OnError(1);
-			return;			
+			return;
 		}
 	}
 
 	for (int i = 0; i < blocks; i++){
-		if ((i*4) + 4 > CARD_MEMORY_SIZE) {
+		if ((i*4) + 4 >= CARD_MEMORY_SIZE) {
 			Dbprintf("Data exceeds buffer!!");
 			break;
 		}
-	
+
 		len = mifare_ultra_readblock(blockNo + i, dataout + 4 * i);
 
 		if (len) {
@@ -334,23 +363,19 @@ void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 		return;
 	}
 
-	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Blocks read %d", countblocks);
+	if (MF_DBGLEVEL >= MF_DBG_DEBUG) Dbprintf("Blocks read %d", countblocks);
 
-	countblocks *= 4;
-/*
-	LED_B_ON();
-	for(size_t i=0; i < countblocks; i += USB_CMD_DATA_SIZE) {
-		size_t len = MIN((countblocks - i),USB_CMD_DATA_SIZE);
-		cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,i,len,countblocks,dataout+i,len);
-	}
-*/
-	cmd_send(CMD_ACK, 1, countblocks, BigBuf_max_traceLen(), 0, 0);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();
+	LED_D_OFF();
+
+	cmd_send(CMD_ACK, 1, countblocks*4, BigBuf_max_traceLen(), 0, 0);
+
+	BigBuf_free();
+	LED_A_OFF();
 }
 
 //-----------------------------------------------------------------------------
-// Select, Authenticate, Write a MIFARE tag. 
+// Select, Authenticate, Write a MIFARE tag.
 // read block
 //-----------------------------------------------------------------------------
 void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
@@ -363,7 +388,7 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 
 	ui64Key = bytes_to_num(datain, 6);
 	memcpy(blockdata, datain + 10, 16);
-	
+
 	// variables
 	byte_t isOK = 0;
 	uint8_t uid[10];
@@ -372,56 +397,57 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	struct Crypto1State *pcs;
 	pcs = &mpcs;
 
-	// clear trace
-	clear_trace();
-
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
+	clear_trace();
+
 	LED_A_ON();
 	LED_B_OFF();
 	LED_C_OFF();
 
 	while (true) {
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
+			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 			break;
 		};
 
-		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Auth error");
+		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, NULL)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
 			break;
 		};
-		
+
 		if(mifare_classic_writeblock(pcs, cuid, blockNo, blockdata)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Write block error");
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Write block error");
 			break;
 		};
 
 		if(mifare_classic_halt(pcs, cuid)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
 			break;
 		};
-		
+
 		isOK = 1;
 		break;
 	}
-	
+
 	//  ----------------------------- crypto1 destroy
 	crypto1_destroy(pcs);
-	
-	if (MF_DBGLEVEL >= 2)	DbpString("WRITE BLOCK FINISHED");
+
+	if (MF_DBGLEVEL >= 2)   DbpString("WRITE BLOCK FINISHED");
+
+	// Thats it...
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
 	LED_B_ON();
 	cmd_send(CMD_ACK,isOK,0,0,0,0);
 	LED_B_OFF();
 
 
-	// Thats it...
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
 }
 
-void MifareUWriteBlock(uint8_t arg0, uint8_t *datain)
+/* // Command not needed but left for future testing
+void MifareUWriteBlockCompat(uint8_t arg0, uint8_t *datain)
 {
 	uint8_t blockNo = arg0;
 	byte_t blockdata[16] = {0x00};
@@ -435,16 +461,16 @@ void MifareUWriteBlock(uint8_t arg0, uint8_t *datain)
 	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	if(!iso14443a_select_card(uid, NULL, NULL)) {
+	if(!iso14443a_select_card(uid, NULL, NULL, true, 0)) {
 		if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 		OnError(0);
 		return;
 	};
 
-	if(mifare_ultra_writeblock(blockNo, blockdata)) {
+	if(mifare_ultra_writeblock_compat(blockNo, blockdata)) {
 		if (MF_DBGLEVEL >= 1)   Dbprintf("Write block error");
 		OnError(0);
-		return;	};
+		return; };
 
 	if(mifare_ultra_halt()) {
 		if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
@@ -454,10 +480,12 @@ void MifareUWriteBlock(uint8_t arg0, uint8_t *datain)
 
 	if (MF_DBGLEVEL >= 2)   DbpString("WRITE BLOCK FINISHED");
 
-	cmd_send(CMD_ACK,1,0,0,0,0);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
+	cmd_send(CMD_ACK,1,0,0,0,0);
 	LEDsoff();
 }
+*/
 
 // Arg0   : Block to write to.
 // Arg1   : 0 = use no authentication.
@@ -465,7 +493,7 @@ void MifareUWriteBlock(uint8_t arg0, uint8_t *datain)
 //          2 = use 0x1B authentication.
 // datain : 4 first bytes is data to be written.
 //        : 4/16 next bytes is authentication key.
-void MifareUWriteBlock_Special(uint8_t arg0, uint8_t arg1, uint8_t *datain)
+void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 {
 	uint8_t blockNo = arg0;
 	bool useKey = (arg1 == 1); //UL_C
@@ -473,13 +501,14 @@ void MifareUWriteBlock_Special(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 	byte_t blockdata[4] = {0x00};
 
 	memcpy(blockdata, datain,4);
-	
+
 	LEDsoff();
 	LED_A_ON();
-	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	if(!iso14443a_select_card(NULL, NULL, NULL)) {
+	clear_trace();
+
+	if(!iso14443a_select_card(NULL, NULL, NULL, true, 0, true)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 		OnError(0);
 		return;
@@ -495,7 +524,7 @@ void MifareUWriteBlock_Special(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 			return;
 		}
 	}
-	
+
 	// UL-EV1 / NTAG authentication
 	if (usePwd) {
 		uint8_t pwd[4] = {0x00};
@@ -507,7 +536,7 @@ void MifareUWriteBlock_Special(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 		}
 	}
 
-	if(mifare_ultra_special_writeblock(blockNo, blockdata)) {
+	if(mifare_ultra_writeblock(blockNo, blockdata)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 		OnError(0);
 		return;
@@ -521,23 +550,25 @@ void MifareUWriteBlock_Special(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 
 	if (MF_DBGLEVEL >= 2) DbpString("WRITE BLOCK FINISHED");
 
-	cmd_send(CMD_ACK,1,0,0,0,0);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
+	cmd_send(CMD_ACK,1,0,0,0,0);
 	LEDsoff();
 }
 
 void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
-	
+
 	uint8_t pwd[16] = {0x00};
 	byte_t blockdata[4] = {0x00};
-	
+
 	memcpy(pwd, datain, 16);
-	
+
 	LED_A_ON(); LED_B_OFF(); LED_C_OFF();
-	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	if(!iso14443a_select_card(NULL, NULL, NULL)) {
+	clear_trace();
+
+	if(!iso14443a_select_card(NULL, NULL, NULL, true, 0, true)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 		OnError(0);
 		return;
@@ -547,7 +578,7 @@ void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 	blockdata[1] = pwd[6];
 	blockdata[2] = pwd[5];
 	blockdata[3] = pwd[4];
-	if(mifare_ultra_special_writeblock( 44, blockdata)) {
+	if(mifare_ultra_writeblock( 44, blockdata)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 		OnError(44);
 		return;
@@ -557,7 +588,7 @@ void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 	blockdata[1] = pwd[2];
 	blockdata[2] = pwd[1];
 	blockdata[3] = pwd[0];
-	if(mifare_ultra_special_writeblock( 45, blockdata)) {
+	if(mifare_ultra_writeblock( 45, blockdata)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 		OnError(45);
 		return;
@@ -567,7 +598,7 @@ void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 	blockdata[1] = pwd[14];
 	blockdata[2] = pwd[13];
 	blockdata[3] = pwd[12];
-	if(mifare_ultra_special_writeblock( 46, blockdata)) {
+	if(mifare_ultra_writeblock( 46, blockdata)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 		OnError(46);
 		return;
@@ -577,11 +608,11 @@ void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 	blockdata[1] = pwd[10];
 	blockdata[2] = pwd[9];
 	blockdata[3] = pwd[8];
-	if(mifare_ultra_special_writeblock( 47, blockdata)) {
+	if(mifare_ultra_writeblock( 47, blockdata)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 		OnError(47);
 		return;
-	};	
+	};
 
 	if(mifare_ultra_halt()) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Halt error");
@@ -589,26 +620,150 @@ void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 		return;
 	};
 
-	cmd_send(CMD_ACK,1,0,0,0,0);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
+	cmd_send(CMD_ACK,1,0,0,0,0);
 	LEDsoff();
 }
 
 // Return 1 if the nonce is invalid else return 0
 int valid_nonce(uint32_t Nt, uint32_t NtEnc, uint32_t Ks1, uint8_t *parity) {
-	return ((oddparity((Nt >> 24) & 0xFF) == ((parity[0]) ^ oddparity((NtEnc >> 24) & 0xFF) ^ BIT(Ks1,16))) & \
-	(oddparity((Nt >> 16) & 0xFF) == ((parity[1]) ^ oddparity((NtEnc >> 16) & 0xFF) ^ BIT(Ks1,8))) & \
-	(oddparity((Nt >> 8) & 0xFF) == ((parity[2]) ^ oddparity((NtEnc >> 8) & 0xFF) ^ BIT(Ks1,0)))) ? 1 : 0;
+	return ((oddparity8((Nt >> 24) & 0xFF) == ((parity[0]) ^ oddparity8((NtEnc >> 24) & 0xFF) ^ BIT(Ks1,16))) & \
+	(oddparity8((Nt >> 16) & 0xFF) == ((parity[1]) ^ oddparity8((NtEnc >> 16) & 0xFF) ^ BIT(Ks1,8))) & \
+	(oddparity8((Nt >> 8) & 0xFF) == ((parity[2]) ^ oddparity8((NtEnc >> 8) & 0xFF) ^ BIT(Ks1,0)))) ? 1 : 0;
 }
 
 
 //-----------------------------------------------------------------------------
-// MIFARE nested authentication. 
-// 
+// acquire encrypted nonces in order to perform the attack described in
+// Carlo Meijer, Roel Verdult, "Ciphertext-only Cryptanalysis on Hardened
+// Mifare Classic Cards" in Proceedings of the 22nd ACM SIGSAC Conference on
+// Computer and Communications Security, 2015
 //-----------------------------------------------------------------------------
-void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *datain)
-{
-	// params
+void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags, uint8_t *datain) {
+	uint64_t ui64Key = 0;
+	uint8_t uid[10];
+	uint32_t cuid;
+	uint8_t cascade_levels = 0;
+	struct Crypto1State mpcs = {0, 0};
+	struct Crypto1State *pcs;
+	pcs = &mpcs;
+	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
+	int16_t isOK = 0;
+	uint8_t par_enc[1];
+	uint8_t nt_par_enc = 0;
+	uint8_t buf[USB_CMD_DATA_SIZE];
+	uint32_t timeout;
+
+	uint8_t blockNo = arg0 & 0xff;
+	uint8_t keyType = (arg0 >> 8) & 0xff;
+	uint8_t targetBlockNo = arg1 & 0xff;
+	uint8_t targetKeyType = (arg1 >> 8) & 0xff;
+	ui64Key = bytes_to_num(datain, 6);
+	bool initialize = flags & 0x0001;
+	bool slow = flags & 0x0002;
+	bool field_off = flags & 0x0004;
+
+	LED_A_ON();
+
+	if (initialize) {
+		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+		clear_trace();
+		set_tracing(true);
+	}
+
+	uint16_t num_nonces = 0;
+	bool have_uid = false;
+	for (uint16_t i = 0; i <= USB_CMD_DATA_SIZE - 9; ) {
+
+		// Test if the action was cancelled
+		if(BUTTON_PRESS()) {
+			isOK = 2;
+			field_off = true;
+			break;
+		}
+
+		if (!have_uid) { // need a full select cycle to get the uid first
+			iso14a_card_select_t card_info;
+			if(!iso14443a_select_card(uid, &card_info, &cuid, true, 0, true)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("AcquireNonces: Can't select card (ALL)");
+				continue;
+			}
+			switch (card_info.uidlen) {
+				case 4 : cascade_levels = 1; break;
+				case 7 : cascade_levels = 2; break;
+				case 10: cascade_levels = 3; break;
+				default: break;
+			}
+			have_uid = true;
+		} else { // no need for anticollision. We can directly select the card
+			if(!iso14443a_select_card(uid, NULL, NULL, false, cascade_levels, true)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("AcquireNonces: Can't select card (UID)");
+				continue;
+			}
+		}
+
+		if (slow) {
+			timeout = GetCountSspClk() + HARDNESTED_PRE_AUTHENTICATION_LEADTIME;
+			while(GetCountSspClk() < timeout);
+		}
+
+		uint32_t nt1;
+		if (mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, NULL, NULL)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("AcquireNonces: Auth1 error");
+			continue;
+		}
+
+		// nested authentication
+		uint16_t len = mifare_sendcmd_short(pcs, AUTH_NESTED, 0x60 + (targetKeyType & 0x01), targetBlockNo, receivedAnswer, par_enc, NULL);
+		if (len != 4) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("AcquireNonces: Auth2 error len=%d", len);
+			continue;
+		}
+
+		// send an incomplete dummy response in order to trigger the card's authentication failure timeout
+		uint8_t dummy_answer[1] = {0};
+		ReaderTransmit(dummy_answer, 1, NULL);
+
+		timeout = GetCountSspClk() + HARDNESTED_AUTHENTICATION_TIMEOUT;
+
+		num_nonces++;
+		if (num_nonces % 2) {
+			memcpy(buf+i, receivedAnswer, 4);
+			nt_par_enc = par_enc[0] & 0xf0;
+		} else {
+			nt_par_enc |= par_enc[0] >> 4;
+			memcpy(buf+i+4, receivedAnswer, 4);
+			memcpy(buf+i+8, &nt_par_enc, 1);
+			i += 9;
+		}
+
+		// wait for the card to become ready again
+		while(GetCountSspClk() < timeout);
+
+	}
+
+	crypto1_destroy(pcs);
+
+	if (field_off) {
+		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+		LED_D_OFF();
+	}
+
+	if (MF_DBGLEVEL >= 3)   DbpString("AcquireEncryptedNonces finished");
+
+	cmd_send(CMD_ACK, isOK, cuid, num_nonces, buf, sizeof(buf));
+
+	LED_A_OFF();
+}
+
+
+//-----------------------------------------------------------------------------
+// MIFARE nested authentication.
+//
+//-----------------------------------------------------------------------------
+void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *datain) {
+
 	uint8_t blockNo = arg0 & 0xff;
 	uint8_t keyType = (arg0 >> 8) & 0xff;
 	uint8_t targetBlockNo = arg1 & 0xff;
@@ -616,16 +771,17 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 	uint64_t ui64Key = 0;
 
 	ui64Key = bytes_to_num(datain, 6);
-	
-	// variables
+
 	uint16_t rtr, i, j, len;
 	uint16_t davg;
 	static uint16_t dmin, dmax;
 	uint8_t uid[10];
-	uint32_t cuid, nt1, nt2, nttmp, nttest, ks1;
+	uint32_t cuid, nt1, nt2_enc, nttmp, nttest, ks1;
 	uint8_t par[1];
 	uint32_t target_nt[2], target_ks[2];
-	
+	uint32_t fixed_nt = 0;
+	uint8_t target_nt_duplicate_count = 0;
+
 	uint8_t par_array[4];
 	uint16_t ncount = 0;
 	struct Crypto1State mpcs = {0, 0};
@@ -633,67 +789,73 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 	pcs = &mpcs;
 	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 
-	uint32_t auth1_time, auth2_time;
+	uint32_t auth1_time, auth2_time, authentication_timeout = 0;
 	static uint16_t delta_time;
 
-	// free eventually allocated BigBuf memory
-	BigBuf_free();
-	// clear trace
-	clear_trace();
-	set_tracing(false);
-	
+	LED_A_ON();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	LED_A_ON();
-	LED_C_OFF();
+	// free eventually allocated BigBuf memory
+	BigBuf_free();
 
+	if (calibrate) clear_trace();
+	set_tracing(true);
 
 	// statistics on nonce distance
-	if (calibrate) {	// for first call only. Otherwise reuse previous calibration
-		LED_B_ON();
+	int16_t isOK = 0;
+	#define NESTED_MAX_TRIES 12
+	uint16_t unsuccessfull_tries = 0;
+	if (calibrate) {    // for first call only. Otherwise reuse previous calibration
 		WDT_HIT();
 
 		davg = dmax = 0;
 		dmin = 2000;
 		delta_time = 0;
-		
+
 		for (rtr = 0; rtr < 17; rtr++) {
 
 			// prepare next select. No need to power down the card.
-			if(mifare_classic_halt(pcs, cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Halt error");
+			if (mifare_classic_halt(pcs, cuid)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Halt error");
 				rtr--;
 				continue;
 			}
 
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Can't select card");
+			// Test if the action was cancelled
+			if (BUTTON_PRESS()) {
+				isOK = -2;
+				break;
+			}
+
+			if (!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Can't select card");
 				rtr--;
 				continue;
 			};
 
 			auth1_time = 0;
-			if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, &auth1_time)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Auth1 error");
+			if (mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, &auth1_time, NULL)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Auth1 error");
 				rtr--;
 				continue;
 			};
+			fixed_nt = nt1;
 
 			if (delta_time) {
 				auth2_time = auth1_time + delta_time;
 			} else {
 				auth2_time = 0;
 			}
-			if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_NESTED, &nt2, &auth2_time)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Auth2 error");
+			if (mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_NESTED, &nt2_enc, &auth2_time, NULL)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Auth2 error");
 				rtr--;
 				continue;
 			};
 
-			nttmp = prng_successor(nt1, 100);				//NXP Mifare is typical around 840,but for some unlicensed/compatible mifare card this can be 160
+			nttmp = prng_successor(nt1, 100);               //NXP Mifare is typical around 840,but for some unlicensed/compatible mifare card this can be 160
 			for (i = 101; i < 1200; i++) {
 				nttmp = prng_successor(nttmp, 1);
-				if (nttmp == nt2) break;
+				if (nttmp == nt2_enc) break;
 			}
 
 			if (i != 1200) {
@@ -706,72 +868,78 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 					delta_time = auth2_time - auth1_time + 32;  // allow some slack for proper timing
 				}
 				if (MF_DBGLEVEL >= 3) Dbprintf("Nested: calibrating... ntdist=%d", i);
+			} else {
+				unsuccessfull_tries++;
+				if (unsuccessfull_tries > NESTED_MAX_TRIES) {   // card isn't vulnerable to nested attack (random numbers are not predictable)
+					isOK = -3;
+				}
 			}
 		}
-		
-		if (rtr <= 1)	return;
 
 		davg = (davg + (rtr - 1)/2) / (rtr - 1);
-		
-		if (MF_DBGLEVEL >= 3) Dbprintf("min=%d max=%d avg=%d, delta_time=%d", dmin, dmax, davg, delta_time);
+
+		if (MF_DBGLEVEL >= 3) Dbprintf("rtr=%d isOK=%d min=%d max=%d avg=%d, delta_time=%d", rtr, isOK, dmin, dmax, davg, delta_time);
 
 		dmin = davg - 2;
 		dmax = davg + 2;
-		
-		LED_B_OFF();
-	
+
 	}
-//  -------------------------------------------------------------------------------------------------	
-	
-	LED_C_ON();
+	//  -------------------------------------------------------------------------------------------------
 
 	//  get crypted nonces for target sector
-	for(i=0; i < 2; i++) { // look for exactly two different nonces
+	for (i = 0; i < 2 && !isOK; i++) { // look for exactly two different nonces
 
 		target_nt[i] = 0;
-		while(target_nt[i] == 0) { // continue until we have an unambiguous nonce
-		
+		while (target_nt[i] == 0 && !isOK) { // continue until we have an unambiguous nonce
+
 			// prepare next select. No need to power down the card.
-			if(mifare_classic_halt(pcs, cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Halt error");
+			if (mifare_classic_halt(pcs, cuid)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Halt error");
 				continue;
 			}
 
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Can't select card");
+			// break out of the loop on button press
+			if (BUTTON_PRESS()) {
+				isOK = -2;
+				break;
+			}
+
+			if (!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Can't select card");
 				continue;
-			};
-		
+			}
+
 			auth1_time = 0;
-			if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, &auth1_time)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Auth1 error");
+			authentication_timeout = 0;
+			if (mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, &auth1_time, &authentication_timeout)) {
+				if (MF_DBGLEVEL >= 1)  Dbprintf("Nested: Auth1 error");
 				continue;
-			};
+			}
 
 			// nested authentication
 			auth2_time = auth1_time + delta_time;
-			len = mifare_sendcmd_shortex(pcs, AUTH_NESTED, 0x60 + (targetKeyType & 0x01), targetBlockNo, receivedAnswer, par, &auth2_time);
+			len = mifare_sendcmd_short(pcs, AUTH_NESTED, 0x60 + (targetKeyType & 0x01), targetBlockNo, receivedAnswer, par, &auth2_time);
 			if (len != 4) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Auth2 error len=%d", len);
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Nested: Auth2 error len=%d", len);
 				continue;
-			};
-		
-			nt2 = bytes_to_num(receivedAnswer, 4);		
-			if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: Testing nt1=%08x nt2enc=%08x nt2par=%02x", i+1, nt1, nt2, par[0]);
-			
+			}
+
+			nt2_enc = bytes_to_num(receivedAnswer, 4);
+			if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: Testing nt1=%08x nt2enc=%08x nt2par=%02x", i+1, nt1, nt2_enc, par[0]);
+
 			// Parity validity check
 			for (j = 0; j < 4; j++) {
-				par_array[j] = (oddparity(receivedAnswer[j]) != ((par[0] >> (7-j)) & 0x01));
+				par_array[j] = (oddparity8(receivedAnswer[j]) != ((par[0] >> (7-j)) & 0x01));
 			}
-			
+
 			ncount = 0;
 			nttest = prng_successor(nt1, dmin - 1);
 			for (j = dmin; j < dmax + 1; j++) {
 				nttest = prng_successor(nttest, 1);
-				ks1 = nt2 ^ nttest;
+				ks1 = nt2_enc ^ nttest;
 
-				if (valid_nonce(nttest, nt2, ks1, par_array)){
-					if (ncount > 0) { 		// we are only interested in disambiguous nonces, try again
+				if (valid_nonce(nttest, nt2_enc, ks1, par_array)){
+					if (ncount > 0) {       // we are only interested in disambiguous nonces, try again
 						if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: dismissed (ambigous), ntdist=%d", i+1, j);
 						target_nt[i] = 0;
 						break;
@@ -780,7 +948,12 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 					target_ks[i] = ks1;
 					ncount++;
 					if (i == 1 && target_nt[1] == target_nt[0]) { // we need two different nonces
-						target_nt[i] = 0;
+						if( ++target_nt_duplicate_count >= NESTED_MAX_TRIES ) { // unable to get a 2nd nonce after NESTED_MAX_TRIES tries, probably a fixed nonce
+							if (MF_DBGLEVEL >= 2) Dbprintf("Nonce#2: cannot get nonce that != nonce#1, continuing anyway with single nonce! ntdist=%d", j);
+							break;
+						}
+
+						target_nt[1] = 0;
 						if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#2: dismissed (= nonce#1), ntdist=%d", j);
 						break;
 					}
@@ -791,100 +964,153 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 		}
 	}
 
-	LED_C_OFF();
-	
-	//  ----------------------------- crypto1 destroy
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	LED_D_OFF();
+
 	crypto1_destroy(pcs);
-	
-	byte_t buf[4 + 4 * 4];
+
+	uint8_t buf[4 + 4 * 4 + 4 + 4];
 	memcpy(buf, &cuid, 4);
 	memcpy(buf+4, &target_nt[0], 4);
 	memcpy(buf+8, &target_ks[0], 4);
 	memcpy(buf+12, &target_nt[1], 4);
 	memcpy(buf+16, &target_ks[1], 4);
-	
-	LED_B_ON();
-	cmd_send(CMD_ACK, 0, 2, targetBlockNo + (targetKeyType * 0x100), buf, sizeof(buf));
-	LED_B_OFF();
+	memcpy(buf+20, &authentication_timeout, 4);
+	memcpy(buf+24, &fixed_nt, 4);
 
-	if (MF_DBGLEVEL >= 3)	DbpString("NESTED FINISHED");
+	if (MF_DBGLEVEL >= 3)   DbpString("NESTED FINISHED");
 
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();
-	set_tracing(TRUE);
+	cmd_send(CMD_ACK, isOK, 0, targetBlockNo + (targetKeyType * 0x100), buf, sizeof(buf));
+
+	LED_A_OFF();
 }
 
+
 //-----------------------------------------------------------------------------
-// MIFARE check keys. key count up to 85. 
-// 
+// MIFARE check keys. key count up to 85.
+//
 //-----------------------------------------------------------------------------
-void MifareChkKeys(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
-{
-  // params
-	uint8_t blockNo = arg0;
-	uint8_t keyType = arg1;
+void MifareChkKeys(uint16_t arg0, uint32_t arg1, uint8_t arg2, uint8_t *datain) {
+
+	uint8_t blockNo = arg0 & 0xff;
+	uint8_t keyType = arg0 >> 8;
+	bool clearTrace = arg1 & 0x01;
+	bool multisectorCheck = arg1 & 0x02;
+	bool init = arg1 & 0x04;
+	bool drop_field = arg1 & 0x08;
+	bool fixed_nonce = arg1 & 0x10;
+	uint32_t auth_timeout = arg1 >> 16;
 	uint8_t keyCount = arg2;
-	uint64_t ui64Key = 0;
+
+	LED_A_ON();
+
+	if (init) {
+		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+	}
 	
-	// variables
-	int i;
-	byte_t isOK = 0;
+	if (clearTrace) {
+		clear_trace();
+	}
+	set_tracing(true);
+
+	// clear debug level. We are expecting lots of authentication failures...
+	int OLD_MF_DBGLEVEL = MF_DBGLEVEL;
+	MF_DBGLEVEL = MF_DBG_NONE;
+
+	int res = 0;
+	if (multisectorCheck) {
+		TKeyIndex keyIndex = {{0}};
+		uint8_t sectorCnt = blockNo;
+		res = MifareMultisectorChk(datain, keyCount, sectorCnt, keyType, &auth_timeout, OLD_MF_DBGLEVEL, &keyIndex);
+		if (res >= 0) {
+			cmd_send(CMD_ACK, 1, res, 0, keyIndex, 80);
+		} else {
+			cmd_send(CMD_ACK, 0, res, 0, NULL, 0);
+		}
+	} else if (fixed_nonce) {
+		res = MifareChkBlockKeysFixedNonce(datain, keyCount, blockNo, keyType, &auth_timeout, OLD_MF_DBGLEVEL);
+		if (res > 0) {
+			cmd_send(CMD_ACK, 1, res, 0, NULL, 0); // key found
+		} else {
+			cmd_send(CMD_ACK, 0, res, 0, NULL, 0); // no key found or aborted
+		}
+	} else {
+		res = MifareChkBlockKeys(datain, keyCount, blockNo, keyType, &auth_timeout, OLD_MF_DBGLEVEL);
+		if (res > 0) {
+			cmd_send(CMD_ACK, 1, res, 0, datain + (res - 1) * 6, 6);
+		} else {
+			cmd_send(CMD_ACK, 0, res, 0, NULL, 0);
+		}
+	}
+
+	if (drop_field || res != 0) {
+		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+		LED_D_OFF();
+	}
+
+	// restore debug level
+	MF_DBGLEVEL = OLD_MF_DBGLEVEL;
+
+	LED_A_OFF();
+}
+
+
+//-----------------------------------------------------------------------------
+// MIFARE Personalize UID. Only for Mifare Classic EV1 7Byte UID
+//-----------------------------------------------------------------------------
+void MifarePersonalizeUID(uint8_t keyType, uint8_t perso_option, uint8_t *data) {
+
 	uint8_t uid[10];
 	uint32_t cuid;
 	struct Crypto1State mpcs = {0, 0};
 	struct Crypto1State *pcs;
 	pcs = &mpcs;
-	
-	// clear debug level
-	int OLD_MF_DBGLEVEL = MF_DBGLEVEL;	
-	MF_DBGLEVEL = MF_DBG_NONE;
-	
-	// clear trace
+
+	LED_A_ON();
 	clear_trace();
-	set_tracing(TRUE);
 
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	LED_A_ON();
-	LED_B_OFF();
-	LED_C_OFF();
-
-	for (i = 0; i < keyCount; i++) {
-		if(mifare_classic_halt(pcs, cuid)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Halt error");
+	bool isOK = false;
+	while (true) {
+		if (!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
+			break;
 		}
 
-		if(!iso14443a_select_card(uid, NULL, &cuid)) {
-			if (OLD_MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Can't select card");
+		uint8_t block_number = 0;
+		uint64_t key = bytes_to_num(data, 6);
+		if (mifare_classic_auth(pcs, cuid, block_number, keyType, key, AUTH_FIRST, NULL)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Auth error");
 			break;
-		};
+		}
 
-		ui64Key = bytes_to_num(datain + i * 6, 6);
-		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
-			continue;
-		};
-		
-		isOK = 1;
+		uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
+		uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
+		int len = mifare_sendcmd_short(pcs, true, MIFARE_EV1_PERSONAL_UID, perso_option, receivedAnswer, receivedAnswerPar, NULL);
+		if (len != 1 || receivedAnswer[0] != CARD_ACK) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
+			break;;
+		}
+		isOK = true;
 		break;
 	}
-	
-	//  ----------------------------- crypto1 destroy
-	crypto1_destroy(pcs);
-	
-	LED_B_ON();
-    cmd_send(CMD_ACK,isOK,0,0,datain + i * 6,6);
-	LED_B_OFF();
 
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();
+	LED_D_OFF();
 
-	// restore debug level
-	MF_DBGLEVEL = OLD_MF_DBGLEVEL;	
+	crypto1_destroy(pcs);
+
+	if (MF_DBGLEVEL >= 2)   DbpString("PERSONALIZE UID FINISHED");
+
+	cmd_send(CMD_ACK, isOK, 0, 0, NULL, 0);
+
+	LED_A_OFF();
 }
 
 //-----------------------------------------------------------------------------
 // MIFARE commands set debug level
-// 
+//
 //-----------------------------------------------------------------------------
 void MifareSetDbgLvl(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 	MF_DBGLEVEL = arg0;
@@ -893,17 +1119,24 @@ void MifareSetDbgLvl(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 
 //-----------------------------------------------------------------------------
 // Work with emulator memory
-// 
+//
+// Note: we call FpgaDownloadAndGo(FPGA_BITSTREAM_HF) here although FPGA is not
+// involved in dealing with emulator memory. But if it is called later, it might
+// destroy the Emulator Memory.
 //-----------------------------------------------------------------------------
+
 void MifareEMemClr(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
+	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 	emlClearMem();
 }
 
 void MifareEMemSet(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
+	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 	emlSetMem(datain, arg0, arg1); // data, block num, blocks count
 }
 
 void MifareEMemGet(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
+	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 	byte_t buf[USB_CMD_DATA_SIZE];
 	emlGetMem(buf, arg0, arg1); // data, block num, blocks count (max 4)
 
@@ -914,7 +1147,7 @@ void MifareEMemGet(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain)
 
 //-----------------------------------------------------------------------------
 // Load a card into the emulator memory
-// 
+//
 //-----------------------------------------------------------------------------
 void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 	uint8_t numSectors = arg0;
@@ -930,49 +1163,47 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 	byte_t dataoutbuf2[16];
 	uint8_t uid[10];
 
-	// clear trace
-	clear_trace();
-	set_tracing(false);
-	
-	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
-
 	LED_A_ON();
 	LED_B_OFF();
 	LED_C_OFF();
-	
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
+	clear_trace();
+	set_tracing(false);
+
 	bool isOK = true;
 
-	if(!iso14443a_select_card(uid, NULL, &cuid)) {
+	if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
 		isOK = false;
-		if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
+		if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 	}
-		
+
 	for (uint8_t sectorNo = 0; isOK && sectorNo < numSectors; sectorNo++) {
 		ui64Key = emlGetKey(sectorNo, keyType);
 		if (sectorNo == 0){
-			if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST)) {
+			if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST, NULL)) {
 				isOK = false;
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Sector[%2d]. Auth error", sectorNo);
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Sector[%2d]. Auth error", sectorNo);
 				break;
 			}
 		} else {
-			if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_NESTED)) {
+			if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_NESTED, NULL)) {
 				isOK = false;
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Sector[%2d]. Auth nested error", sectorNo);
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Sector[%2d]. Auth nested error", sectorNo);
 				break;
 			}
 		}
-		
+
 		for (uint8_t blockNo = 0; isOK && blockNo < NumBlocksPerSector(sectorNo); blockNo++) {
 			if(isOK && mifare_classic_readblock(pcs, cuid, FirstBlockOfSector(sectorNo) + blockNo, dataoutbuf)) {
 				isOK = false;
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Error reading sector %2d block %2d", sectorNo, blockNo);
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Error reading sector %2d block %2d", sectorNo, blockNo);
 				break;
 			};
 			if (isOK) {
 				if (blockNo < NumBlocksPerSector(sectorNo) - 1) {
 					emlSetMem(dataoutbuf, FirstBlockOfSector(sectorNo) + blockNo, 1);
-				} else {	// sector trailer, keep the keys, set only the AC
+				} else {    // sector trailer, keep the keys, set only the AC
 					emlGetMem(dataoutbuf2, FirstBlockOfSector(sectorNo) + blockNo, 1);
 					memcpy(&dataoutbuf2[6], &dataoutbuf[6], 4);
 					emlSetMem(dataoutbuf2,  FirstBlockOfSector(sectorNo) + blockNo, 1);
@@ -983,7 +1214,7 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 	}
 
 	if(mifare_classic_halt(pcs, cuid)) {
-		if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
+		if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");
 	};
 
 	//  ----------------------------- crypto1 destroy
@@ -991,7 +1222,7 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
-	
+
 	if (MF_DBGLEVEL >= 2) DbpString("EMUL FILL SECTORS FINISHED");
 
 }
@@ -999,10 +1230,148 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 
 //-----------------------------------------------------------------------------
 // Work with "magic Chinese" card (email him: ouyangweidaxian@live.cn)
-// 
+//
 //-----------------------------------------------------------------------------
+
+static bool isBlockTrailer(int blockN) {
+	if (blockN >= 0 && blockN < 128) {
+		return ((blockN & 0x03) == 0x03);
+	}
+	if (blockN >= 128 && blockN <= 256) {
+		return ((blockN & 0x0F) == 0x0F);
+	}
+	return false;
+}
+
+void MifareCWipe(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
+	// var
+	byte_t isOK = 0;
+	uint32_t numBlocks = arg0;
+	// cmdParams:
+	// bit 0 - wipe gen1a
+	// bit 1 - fill card with default data
+	// bit 2 - gen1a = 0, gen1b = 1
+	uint8_t cmdParams = arg1;
+	bool needWipe = cmdParams & 0x01;
+	bool needFill = cmdParams & 0x02;
+	bool gen1b = cmdParams & 0x04;
+
+	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
+	uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
+
+	uint8_t block0[16] = {0x01, 0x02, 0x03, 0x04, 0x04, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xBE, 0xAF};
+	uint8_t block1[16] = {0x00};
+	uint8_t blockK[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x08, 0x77, 0x8F, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+	uint8_t d_block[18] = {0x00};
+
+	// card commands
+	uint8_t wupC1[]       = { 0x40 };
+	uint8_t wupC2[]       = { 0x43 };
+	uint8_t wipeC[]       = { 0x41 };
+
+	// iso14443 setup
+	LED_A_ON();
+	LED_B_OFF();
+	LED_C_OFF();
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
+	// tracing
+	clear_trace();
+	set_tracing(true);
+
+	while (true){
+		// wipe
+		if (needWipe){
+			ReaderTransmitBitsPar(wupC1,7,0, NULL);
+			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("wupC1 error");
+				break;
+			};
+
+			ReaderTransmit(wipeC, sizeof(wipeC), NULL);
+			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("wipeC error");
+				break;
+			};
+
+			if(mifare_classic_halt(NULL, 0)) {
+				if (MF_DBGLEVEL > 2)    Dbprintf("Halt error");
+			};
+		};
+
+		// put default data
+		if (needFill){
+			// select commands
+			ReaderTransmitBitsPar(wupC1, 7, 0, NULL);
+
+			// gen1b magic tag : do no issue wupC2 and don't expect CARD_ACK response after SELECT_UID (after getting UID from chip in 'hf mf csetuid' command)
+			if (!gen1b) {
+
+				if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+					if (MF_DBGLEVEL >= 1)   Dbprintf("wupC1 error");
+					break;
+				};
+
+				ReaderTransmit(wupC2, sizeof(wupC2), NULL);
+				if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+					if (MF_DBGLEVEL >= 1)   Dbprintf("wupC2 error");
+					break;
+				};
+			}
+
+			// send blocks command
+			for (int blockNo = 0; blockNo < numBlocks; blockNo++) {
+				if ((mifare_sendcmd_short(NULL, 0, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 1) || (receivedAnswer[0] != CARD_ACK)) {
+					if (MF_DBGLEVEL >= 1)   Dbprintf("write block send command error");
+					break;
+				};
+
+				// check type of block and add crc
+				if (!isBlockTrailer(blockNo)){
+					memcpy(d_block, block1, 16);
+				} else {
+					memcpy(d_block, blockK, 16);
+				}
+				if (blockNo == 0) {
+					memcpy(d_block, block0, 16);
+				}
+				AppendCrc14443a(d_block, 16);
+
+				// send write command
+				ReaderTransmit(d_block, sizeof(d_block), NULL);
+				if ((ReaderReceive(receivedAnswer, receivedAnswerPar) != 1) || (receivedAnswer[0] != CARD_ACK)) {
+					if (MF_DBGLEVEL >= 1)   Dbprintf("write block send data error");
+					break;
+				};
+			}
+
+			// halt
+			// do no issue halt command for gen1b
+			if (!gen1b) {
+				if (mifare_classic_halt(NULL, 0)) {
+					if (MF_DBGLEVEL > 2)    Dbprintf("Halt error");
+						break;
+				}
+			}
+		}
+		break;
+	}
+
+	// reset fpga
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
+	// send USB response
+	LED_B_ON();
+	cmd_send(CMD_ACK,isOK,0,0,NULL,0);
+	LED_B_OFF();
+
+	LEDsoff();
+
+	return;
+}
+
 void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
-  
+
   // params
 	uint8_t needWipe = arg0;
 	// bit 0 - need get UID
@@ -1010,20 +1379,21 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 	// bit 2 - need HALT after sequence
 	// bit 3 - need init FPGA and field before sequence
 	// bit 4 - need reset FPGA and LED
+	// bit 6 - gen1b backdoor type
 	uint8_t workFlags = arg1;
 	uint8_t blockNo = arg2;
-	
+
 	// card commands
-	uint8_t wupC1[]       = { 0x40 }; 
-	uint8_t wupC2[]       = { 0x43 }; 
-	uint8_t wipeC[]       = { 0x41 }; 
-	
+	uint8_t wupC1[]       = { 0x40 };
+	uint8_t wupC2[]       = { 0x43 };
+	uint8_t wipeC[]       = { 0x41 };
+
 	// variables
 	byte_t isOK = 0;
 	uint8_t uid[10] = {0x00};
 	uint8_t d_block[18] = {0x00};
 	uint32_t cuid;
-	
+
 	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 	uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 
@@ -1032,203 +1402,244 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		LED_A_ON();
 		LED_B_OFF();
 		LED_C_OFF();
-	
-		clear_trace();
-		set_tracing(TRUE);
 		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
+		clear_trace();
+		set_tracing(true);
 	}
 
 	while (true) {
 
 		// get UID from chip
 		if (workFlags & 0x01) {
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
-				break;
-			};
-
-			if(mifare_classic_halt(NULL, cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
-				break;
-			};
+			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
+				// Continue, if we set wrong UID or wrong UID checksum or some ATQA or SAK we will can't select card. But we need to write block 0 to make card work.
+				//break;
+				};
+
+				if(mifare_classic_halt(NULL, cuid)) {
+					if (MF_DBGLEVEL > 2)    Dbprintf("Halt error");
+					// Continue, some magic tags misbehavies and send an answer to it.
+					// break;
+				};
 		};
-	
+
 		// reset chip
-		if (needWipe){
+		// Wipe command don't work with gen1b
+		if (needWipe && !(workFlags & 0x40)){
 			ReaderTransmitBitsPar(wupC1,7,0, NULL);
-			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("wupC1 error");
+			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("wupC1 error");
 				break;
 			};
 
 			ReaderTransmit(wipeC, sizeof(wipeC), NULL);
-			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("wipeC error");
+			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("wipeC error");
 				break;
 			};
 
-			if(mifare_classic_halt(NULL, cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
-				break;
+			if(mifare_classic_halt(NULL, 0)) {
+				if (MF_DBGLEVEL > 2)    Dbprintf("Halt error");
+				// Continue, some magic tags misbehavies and send an answer to it.
+							// break;
 			};
-		};	
+		};
 
 		// write block
 		if (workFlags & 0x02) {
 			ReaderTransmitBitsPar(wupC1,7,0, NULL);
-			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("wupC1 error");
-				break;
-			};
 
-			ReaderTransmit(wupC2, sizeof(wupC2), NULL);
-			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("wupC2 error");
-				break;
-			};
+			// gen1b magic tag : do no issue wupC2 and don't expect CARD_ACK response after SELECT_UID (after getting UID from chip in 'hf mf csetuid' command)
+			if (!(workFlags & 0x40)) {
+
+				if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+					if (MF_DBGLEVEL >= 1)   Dbprintf("wupC1 error");
+					break;
+				};
+
+				ReaderTransmit(wupC2, sizeof(wupC2), NULL);
+				if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+					if (MF_DBGLEVEL >= 1)   Dbprintf("wupC2 error");
+					break;
+				};
+			}
 		}
 
-		if ((mifare_sendcmd_short(NULL, 0, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 1) || (receivedAnswer[0] != 0x0a)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("write block send command error");
+		if ((mifare_sendcmd_short(NULL, 0, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 1) || (receivedAnswer[0] != CARD_ACK)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("write block send command error");
 			break;
 		};
-	
+
 		memcpy(d_block, datain, 16);
 		AppendCrc14443a(d_block, 16);
-	
+
 		ReaderTransmit(d_block, sizeof(d_block), NULL);
-		if ((ReaderReceive(receivedAnswer, receivedAnswerPar) != 1) || (receivedAnswer[0] != 0x0a)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("write block send data error");
+		if ((ReaderReceive(receivedAnswer, receivedAnswerPar) != 1) || (receivedAnswer[0] != CARD_ACK)) {
+			if (MF_DBGLEVEL >= 1)   Dbprintf("write block send data error");
 			break;
-		};	
-	
+		};
+
 		if (workFlags & 0x04) {
-			if (mifare_classic_halt(NULL, cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
-				break;
-			};
+			// do no issue halt command for gen1b magic tag (#db# halt error. response len: 1)
+			if (!(workFlags & 0x40)) {
+				if (mifare_classic_halt(NULL, 0)) {
+					if (MF_DBGLEVEL > 2)    Dbprintf("Halt error");
+					// Continue, some magic tags misbehavies and send an answer to it.
+					// break;
+				}
+			}
 		}
-		
+
 		isOK = 1;
 		break;
 	}
-	
-	LED_B_ON();
-	cmd_send(CMD_ACK,isOK,0,0,uid,4);
-	LED_B_OFF();
 
 	if ((workFlags & 0x10) || (!isOK)) {
 		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-		LEDsoff();
 	}
+
+	LED_B_ON();
+	cmd_send(CMD_ACK,isOK,0,0,uid,4);
+	LED_B_OFF();
+
+	LEDsoff();
 }
 
 
 void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
-  
-  // params
+
+	// params
 	// bit 1 - need wupC
 	// bit 2 - need HALT after sequence
 	// bit 3 - need init FPGA and field before sequence
 	// bit 4 - need reset FPGA and LED
+	// bit 5 - need to set datain instead of issuing USB reply (called via ARM for StandAloneMode14a)
+	// bit 6 - gen1b backdoor type
 	uint8_t workFlags = arg0;
 	uint8_t blockNo = arg2;
-	
+
 	// card commands
-	uint8_t wupC1[]       = { 0x40 }; 
-	uint8_t wupC2[]       = { 0x43 }; 
-	
+	uint8_t wupC1[]       = { 0x40 };
+	uint8_t wupC2[]       = { 0x43 };
+
 	// variables
 	byte_t isOK = 0;
 	uint8_t data[18] = {0x00};
 	uint32_t cuid = 0;
-	
+
 	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 	uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
-	
+
 	if (workFlags & 0x08) {
 		LED_A_ON();
 		LED_B_OFF();
 		LED_C_OFF();
-	
-		clear_trace();
-		set_tracing(TRUE);
 		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
+		clear_trace();
+		set_tracing(true);
 	}
 
 	while (true) {
 		if (workFlags & 0x02) {
 			ReaderTransmitBitsPar(wupC1,7,0, NULL);
-			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("wupC1 error");
+			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("wupC1 error");
 				break;
-			};
-
+		};
+		// do no issue for gen1b magic tag
+		if (!(workFlags & 0x40)) {
 			ReaderTransmit(wupC2, sizeof(wupC2), NULL);
-			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("wupC2 error");
+			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != CARD_ACK)) {
+				if (MF_DBGLEVEL >= 1)   Dbprintf("wupC2 error");
 				break;
 			};
 		}
+	}
 
 		// read block
 		if ((mifare_sendcmd_short(NULL, 0, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 18)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("read block send command error");
+			if (MF_DBGLEVEL >= 1)   Dbprintf("read block send command error");
 			break;
 		};
 		memcpy(data, receivedAnswer, 18);
-		
+
 		if (workFlags & 0x04) {
-			if (mifare_classic_halt(NULL, cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
-				break;
-			};
+			// do no issue halt command for gen1b magic tag (#db# halt error. response len: 1)
+			if (!(workFlags & 0x40)) {
+				if (mifare_classic_halt(NULL, cuid)) {
+					if (MF_DBGLEVEL > 1)    Dbprintf("Halt error");
+					// Continue, some magic tags misbehavies and send an answer to it.
+					//      break;
+				}
+			}
 		}
-		
+
 		isOK = 1;
 		break;
 	}
-	
-	LED_B_ON();
-	cmd_send(CMD_ACK,isOK,0,0,data,18);
-	LED_B_OFF();
 
 	if ((workFlags & 0x10) || (!isOK)) {
 		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-		LEDsoff();
 	}
+
+	LED_B_ON();
+	if (workFlags & 0x20) {
+		if (isOK)
+			memcpy(datain, data, 18);
+	}
+	else
+		cmd_send(CMD_ACK,isOK,0,0,data,18);
+	LED_B_OFF();
+
+	LEDsoff();
 }
 
 void MifareCIdent(){
-  
+
 	// card commands
-	uint8_t wupC1[]       = { 0x40 }; 
-	uint8_t wupC2[]       = { 0x43 }; 
-	
+	uint8_t wupC1[]       = { 0x40 };
+	uint8_t wupC2[]       = { 0x43 };
+
 	// variables
-	byte_t isOK = 1;
-	
+	byte_t isOK = 0;
+
 	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 	uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 
+	LED_A_ON();
+	LED_B_OFF();
+	LED_C_OFF();
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
+	clear_trace();
+	set_tracing(true);
+
 	ReaderTransmitBitsPar(wupC1,7,0, NULL);
-	if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-		isOK = 0;
-	};
+	if(ReaderReceive(receivedAnswer, receivedAnswerPar) && (receivedAnswer[0] == CARD_ACK)) {
+		isOK = 2;
 
-	ReaderTransmit(wupC2, sizeof(wupC2), NULL);
-	if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-		isOK = 0;
+		ReaderTransmit(wupC2, sizeof(wupC2), NULL);
+		if(ReaderReceive(receivedAnswer, receivedAnswerPar) && (receivedAnswer[0] == CARD_ACK)) {
+			isOK = 1;
+		};
 	};
 
-	if (mifare_classic_halt(NULL, 0)) {
-		isOK = 0;
-	};
+	// From iceman1001: removed the if,  since some magic tags misbehavies and send an answer to it.
+	mifare_classic_halt(NULL, 0);
 
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
+	LED_B_ON();
 	cmd_send(CMD_ACK,isOK,0,0,0,0);
+	LED_B_OFF();
+
+	LEDsoff();
 }
 
-			//
+//
 // DESFIRE
 //
 
@@ -1237,11 +1648,11 @@ void Mifare_DES_Auth1(uint8_t arg0, uint8_t *datain){
 	byte_t dataout[11] = {0x00};
 	uint8_t uid[10] = {0x00};
 	uint32_t cuid;
-    
-	clear_trace();
+
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+	clear_trace();
 
-	int len = iso14443a_select_card(uid, NULL, &cuid);
+	int len = iso14443a_select_card(uid, NULL, &cuid, true, 0, true);
 	if(!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");
 		OnError(1);
@@ -1255,7 +1666,8 @@ void Mifare_DES_Auth1(uint8_t arg0, uint8_t *datain){
 	}
 
 	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 1 FINISHED");
-    cmd_send(CMD_ACK,1,cuid,0,dataout, sizeof(dataout));
+
+	cmd_send(CMD_ACK, 1, cuid, 0, dataout, sizeof(dataout));
 }
 
 void Mifare_DES_Auth2(uint32_t arg0, uint8_t *datain){
@@ -1264,37 +1676,22 @@ void Mifare_DES_Auth2(uint32_t arg0, uint8_t *datain){
 	uint8_t key[16] = {0x00};
 	byte_t isOK = 0;
 	byte_t dataout[12] = {0x00};
-    
+
 	memcpy(key, datain, 16);
-	
+
 	isOK = mifare_desfire_des_auth2(cuid, key, dataout);
-	
-	if( isOK) {
-	    if (MF_DBGLEVEL >= MF_DBG_EXTENDED) 
-			Dbprintf("Authentication part2: Failed");  
-		//OnError(4);
+
+	if (isOK) {
+		if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Authentication part2: Failed");
+		OnError(4);
 		return;
 	}
 
-	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) 
-		DbpString("AUTH 2 FINISHED");
-
-	cmd_send(CMD_ACK, isOK, 0, 0, dataout, sizeof(dataout));
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();
-}
 
-void OnSuccess(){
-	pcb_blocknum = 0;
-	ReaderTransmit(deselect_cmd, 3 , NULL);
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();
-}
+	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 2 FINISHED");
 
-void OnError(uint8_t reason){
-	pcb_blocknum = 0;
-	ReaderTransmit(deselect_cmd, 3 , NULL);
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	cmd_send(CMD_ACK,0,reason,0,0,0);
+	cmd_send(CMD_ACK, isOK, 0, 0, dataout, sizeof(dataout));
 	LEDsoff();
 }
+