X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f98702bace48fde3ec1492d1c732e23cd2eb8613..refs/pull/938/head:/armsrc/mifarecmd.c?ds=inline

diff --git a/armsrc/mifarecmd.c b/armsrc/mifarecmd.c
index 8fe502ca..15db8f11 100644
--- a/armsrc/mifarecmd.c
+++ b/armsrc/mifarecmd.c
@@ -15,13 +15,23 @@
 
 #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 
+#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
@@ -73,22 +83,22 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 
 	while (true) {
 		if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
+			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;
 		};
 
@@ -99,13 +109,14 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	//  ----------------------------- 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();
 }
 
@@ -192,9 +203,10 @@ void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 		return;
 	}
 
-	cmd_send(CMD_ACK,1,0,0,dataout,16);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LED_D_OFF();
+
+	cmd_send(CMD_ACK,1,0,0,dataout,16);
 	LED_A_OFF();
 }
 
@@ -230,25 +242,25 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	isOK = 1;
 	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
@@ -256,12 +268,13 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 
 	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();
 }
 
@@ -352,10 +365,11 @@ void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 
 	if (MF_DBGLEVEL >= MF_DBG_DEBUG) Dbprintf("Blocks read %d", countblocks);
 
-	cmd_send(CMD_ACK, 1, countblocks*4, BigBuf_max_traceLen(), 0, 0);
-
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LED_D_OFF();
+
+	cmd_send(CMD_ACK, 1, countblocks*4, BigBuf_max_traceLen(), 0, 0);
+
 	BigBuf_free();
 	LED_A_OFF();
 }
@@ -393,22 +407,22 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 
 	while (true) {
 			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
+			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;
 		};
 
@@ -419,15 +433,16 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	//  ----------------------------- 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();
 }
 
@@ -455,7 +470,7 @@ void MifareUWriteBlockCompat(uint8_t arg0, uint8_t *datain)
 	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");
@@ -465,8 +480,9 @@ void MifareUWriteBlockCompat(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();
 }
 */
@@ -534,8 +550,9 @@ void MifareUWriteBlock(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();
 }
 
@@ -603,8 +620,9 @@ 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();
 }
 
@@ -622,8 +640,7 @@ int valid_nonce(uint32_t Nt, uint32_t NtEnc, uint32_t Ks1, uint8_t *parity) {
 // Mifare Classic Cards" in Proceedings of the 22nd ACM SIGSAC Conference on
 // Computer and Communications Security, 2015
 //-----------------------------------------------------------------------------
-void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags, uint8_t *datain)
-{
+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;
@@ -648,7 +665,6 @@ void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags,
 	bool field_off = flags & 0x0004;
 
 	LED_A_ON();
-	LED_C_OFF();
 
 	if (initialize) {
 		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
@@ -656,8 +672,6 @@ void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags,
 		set_tracing(true);
 	}
 
-	LED_C_ON();
-
 	uint16_t num_nonces = 0;
 	bool have_uid = false;
 	for (uint16_t i = 0; i <= USB_CMD_DATA_SIZE - 9; ) {
@@ -672,7 +686,7 @@ void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags,
 		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)");
+				if (MF_DBGLEVEL >= 1)   Dbprintf("AcquireNonces: Can't select card (ALL)");
 				continue;
 			}
 			switch (card_info.uidlen) {
@@ -684,7 +698,7 @@ void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags,
 			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)");
+				if (MF_DBGLEVEL >= 1)   Dbprintf("AcquireNonces: Can't select card (UID)");
 				continue;
 			}
 		}
@@ -695,15 +709,15 @@ void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags,
 		}
 
 		uint32_t nt1;
-		if (mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, NULL)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("AcquireNonces: Auth1 error");
+		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);
+			if (MF_DBGLEVEL >= 1)   Dbprintf("AcquireNonces: Auth2 error len=%d", len);
 			continue;
 		}
 
@@ -712,7 +726,7 @@ void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags,
 		ReaderTransmit(dummy_answer, 1, NULL);
 
 		timeout = GetCountSspClk() + HARDNESTED_AUTHENTICATION_TIMEOUT;
-		
+
 		num_nonces++;
 		if (num_nonces % 2) {
 			memcpy(buf+i, receivedAnswer, 4);
@@ -729,20 +743,18 @@ void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags,
 
 	}
 
-	LED_C_OFF();
-
 	crypto1_destroy(pcs);
 
-	LED_B_ON();
-	cmd_send(CMD_ACK, isOK, cuid, num_nonces, buf, sizeof(buf));
-	LED_B_OFF();
-
-	if (MF_DBGLEVEL >= 3)	DbpString("AcquireEncryptedNonces finished");
-
 	if (field_off) {
 		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-		LEDsoff();
+		LED_D_OFF();
 	}
+
+	if (MF_DBGLEVEL >= 3)   DbpString("AcquireEncryptedNonces finished");
+
+	cmd_send(CMD_ACK, isOK, cuid, num_nonces, buf, sizeof(buf));
+
+	LED_A_OFF();
 }
 
 
@@ -750,9 +762,8 @@ void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags,
 // MIFARE nested authentication.
 //
 //-----------------------------------------------------------------------------
-void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *datain)
-{
-	// params
+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;
@@ -761,14 +772,15 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 
 	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;
@@ -777,11 +789,10 @@ 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;
 
 	LED_A_ON();
-	LED_C_OFF();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
 	// free eventually allocated BigBuf memory
@@ -794,8 +805,7 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 	int16_t isOK = 0;
 	#define NESTED_MAX_TRIES 12
 	uint16_t unsuccessfull_tries = 0;
-	if (calibrate) {	// for first call only. Otherwise reuse previous calibration
-		LED_B_ON();
+	if (calibrate) {    // for first call only. Otherwise reuse previous calibration
 		WDT_HIT();
 
 		davg = dmax = 0;
@@ -804,47 +814,48 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 
 		for (rtr = 0; rtr < 17; rtr++) {
 
-			// Test if the action was cancelled
-			if(BUTTON_PRESS()) {
-				isOK = -2;
-				break;
-			}
-
 			// 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, true, 0, true)) {
-				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) {
@@ -859,7 +870,7 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 				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)
+				if (unsuccessfull_tries > NESTED_MAX_TRIES) {   // card isn't vulnerable to nested attack (random numbers are not predictable)
 					isOK = -3;
 				}
 			}
@@ -872,46 +883,49 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 		dmin = davg - 2;
 		dmax = davg + 2;
 
-		LED_B_OFF();
-
 	}
 	//  -------------------------------------------------------------------------------------------------
 
-	LED_C_ON();
-
 	//  get crypted nonces for target sector
-	for(i=0; i < 2 && !isOK; 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, true, 0, true)) {
-				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_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++) {
@@ -922,10 +936,10 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 			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;
@@ -934,7 +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;
 					}
@@ -945,84 +964,147 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 		}
 	}
 
-	LED_C_OFF();
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	LED_D_OFF();
 
-	//  ----------------------------- crypto1 destroy
 	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);
+	memcpy(buf+20, &authentication_timeout, 4);
+	memcpy(buf+24, &fixed_nt, 4);
 
-	LED_B_ON();
-	cmd_send(CMD_ACK, isOK, 0, targetBlockNo + (targetKeyType * 0x100), buf, sizeof(buf));
-	LED_B_OFF();
+	if (MF_DBGLEVEL >= 3)   DbpString("NESTED FINISHED");
 
-	if (MF_DBGLEVEL >= 3)	DbpString("NESTED FINISHED");
+	cmd_send(CMD_ACK, isOK, 0, targetBlockNo + (targetKeyType * 0x100), buf, sizeof(buf));
 
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();
+	LED_A_OFF();
 }
 
+
 //-----------------------------------------------------------------------------
 // MIFARE check keys. key count up to 85.
 //
 //-----------------------------------------------------------------------------
-void MifareChkKeys(uint16_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
-{
+void MifareChkKeys(uint16_t arg0, uint32_t arg1, uint8_t arg2, uint8_t *datain) {
+
 	uint8_t blockNo = arg0 & 0xff;
-	uint8_t keyType = (arg0 >> 8) & 0xff;
+	uint8_t keyType = arg0 >> 8;
 	bool clearTrace = arg1 & 0x01;
 	bool multisectorCheck = arg1 & 0x02;
-	uint8_t set14aTimeout = (arg1 >> 8) & 0xff;
+	bool init = arg1 & 0x04;
+	bool drop_field = arg1 & 0x08;
+	bool fixed_nonce = arg1 & 0x10;
+	uint32_t auth_timeout = arg1 >> 16;
 	uint8_t keyCount = arg2;
 
 	LED_A_ON();
 
-	// clear debug level
-	int OLD_MF_DBGLEVEL = MF_DBGLEVEL;
-	MF_DBGLEVEL = MF_DBG_NONE;
-
-	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
-
+	if (init) {
+		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+	}
+	
 	if (clearTrace) {
 		clear_trace();
 	}
 	set_tracing(true);
 
-	if (set14aTimeout){
-		iso14a_set_timeout(set14aTimeout * 10); // timeout: ms = x/106  35-minimum, 50-OK 106-recommended 500-safe
-	}
-	
+	// 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;
-		int res = MifareMultisectorChk(datain, keyCount, sectorCnt, keyType, OLD_MF_DBGLEVEL, &keyIndex);
-
+		res = MifareMultisectorChk(datain, keyCount, sectorCnt, keyType, &auth_timeout, OLD_MF_DBGLEVEL, &keyIndex);
 		if (res >= 0) {
-			cmd_send(CMD_ACK, 1, 0, 0, keyIndex, 80);
+			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, 0, 0, NULL, 0);
+			cmd_send(CMD_ACK, 0, res, 0, NULL, 0); // no key found or aborted
 		}
-	} else {	
-		int res = MifareChkBlockKeys(datain, keyCount, blockNo, keyType, OLD_MF_DBGLEVEL);
-		
+	} else {
+		res = MifareChkBlockKeys(datain, keyCount, blockNo, keyType, &auth_timeout, OLD_MF_DBGLEVEL);
 		if (res > 0) {
-			cmd_send(CMD_ACK, 1, 0, 0, datain + (res - 1) * 6, 6);
+			cmd_send(CMD_ACK, 1, res, 0, datain + (res - 1) * 6, 6);
 		} else {
-			cmd_send(CMD_ACK, 0, 0, 0, NULL, 0);
+			cmd_send(CMD_ACK, 0, res, 0, NULL, 0);
 		}
 	}
 
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LED_D_OFF();
+	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;
+
+	LED_A_ON();
+	clear_trace();
+
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
+	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;
+		}
+
+		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;
+		}
+
+		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;
+	}
+
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	LED_D_OFF();
+
+	crypto1_destroy(pcs);
+
+	if (MF_DBGLEVEL >= 2)   DbpString("PERSONALIZE UID FINISHED");
+
+	cmd_send(CMD_ACK, isOK, 0, 0, NULL, 0);
+
 	LED_A_OFF();
 }
 
@@ -1093,21 +1175,21 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 
 	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;
 			}
 		}
@@ -1115,13 +1197,13 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		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);
@@ -1132,7 +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
@@ -1173,20 +1255,20 @@ void MifareCWipe(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 	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();
@@ -1196,54 +1278,54 @@ void MifareCWipe(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 	// tracing
 	clear_trace();
 	set_tracing(true);
-		
+
 	while (true){
 		// wipe
 		if (needWipe){
 			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, 0)) {
-				if (MF_DBGLEVEL > 2)	Dbprintf("Halt error");
+				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 0x0a response after SELECT_UID (after getting UID from chip in 'hf mf csetuid' command)
-			if (!gen1b) { 
+			// 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] != 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(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;
 				};
 			}
 
 			// send blocks command
 			for (int blockNo = 0; blockNo < numBlocks; blockNo++) {
-				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;
 				};
-				
+
 				// check type of block and add crc
 				if (!isBlockTrailer(blockNo)){
 					memcpy(d_block, block1, 16);
@@ -1257,33 +1339,34 @@ void MifareCWipe(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 
 				// send write command
 				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;
 				};
 			}
-			
+
 			// halt
-			// do no issue halt command for gen1b 
+			// do no issue halt command for gen1b
 			if (!gen1b) {
 				if (mifare_classic_halt(NULL, 0)) {
-					if (MF_DBGLEVEL > 2)	Dbprintf("Halt error");
+					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();
-	
-	// reset fpga
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
 	LEDsoff();
-		
+
 	return;
 }
 
@@ -1330,13 +1413,13 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		// get UID from chip
 		if (workFlags & 0x01) {
 			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
+				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");
+					if (MF_DBGLEVEL > 2)    Dbprintf("Halt error");
 					// Continue, some magic tags misbehavies and send an answer to it.
 					// break;
 				};
@@ -1346,21 +1429,21 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		// 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, 0)) {
-				if (MF_DBGLEVEL > 2)	Dbprintf("Halt error");
+				if (MF_DBGLEVEL > 2)    Dbprintf("Halt error");
 				// Continue, some magic tags misbehavies and send an answer to it.
-                        	// break;
+							// break;
 			};
 		};
 
@@ -1368,24 +1451,24 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		if (workFlags & 0x02) {
 			ReaderTransmitBitsPar(wupC1,7,0, NULL);
 
-			// gen1b magic tag : do no issue wupC2 and don't expect 0x0a response after SELECT_UID (after getting UID from chip in 'hf mf csetuid' command)
+			// 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] != 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(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;
 				};
 			}
 		}
 
-		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;
 		};
 
@@ -1393,8 +1476,8 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		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;
 		};
 
@@ -1402,7 +1485,7 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 			// 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");
+					if (MF_DBGLEVEL > 2)    Dbprintf("Halt error");
 					// Continue, some magic tags misbehavies and send an answer to it.
 					// break;
 				}
@@ -1413,14 +1496,15 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		break;
 	}
 
+	if ((workFlags & 0x10) || (!isOK)) {
+		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	}
+
 	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();
-	}
+	LEDsoff();
 }
 
 
@@ -1461,15 +1545,15 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 	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;
 			};
 		}
@@ -1477,7 +1561,7 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 
 		// 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);
@@ -1486,9 +1570,9 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 			// 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");
+					if (MF_DBGLEVEL > 1)    Dbprintf("Halt error");
 					// Continue, some magic tags misbehavies and send an answer to it.
-					//		break;
+					//      break;
 				}
 			}
 		}
@@ -1497,6 +1581,10 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		break;
 	}
 
+	if ((workFlags & 0x10) || (!isOK)) {
+		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	}
+
 	LED_B_ON();
 	if (workFlags & 0x20) {
 		if (isOK)
@@ -1506,10 +1594,7 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		cmd_send(CMD_ACK,isOK,0,0,data,18);
 	LED_B_OFF();
 
-	if ((workFlags & 0x10) || (!isOK)) {
-		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-		LEDsoff();
-	}
+	LEDsoff();
 }
 
 void MifareCIdent(){
@@ -1523,34 +1608,35 @@ void MifareCIdent(){
 
 	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);	
+	set_tracing(true);
 
 	ReaderTransmitBitsPar(wupC1,7,0, NULL);
-	if(ReaderReceive(receivedAnswer, receivedAnswerPar) && (receivedAnswer[0] == 0x0a)) {
+	if(ReaderReceive(receivedAnswer, receivedAnswerPar) && (receivedAnswer[0] == CARD_ACK)) {
 		isOK = 2;
 
 		ReaderTransmit(wupC2, sizeof(wupC2), NULL);
-		if(ReaderReceive(receivedAnswer, receivedAnswerPar) && (receivedAnswer[0] == 0x0a)) {
+		if(ReaderReceive(receivedAnswer, receivedAnswerPar) && (receivedAnswer[0] == CARD_ACK)) {
 			isOK = 1;
 		};
 	};
 
 	// 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();
 
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();	
+	LEDsoff();
 }
 
 //
@@ -1580,7 +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){
@@ -1594,16 +1681,17 @@ void Mifare_DES_Auth2(uint32_t arg0, uint8_t *datain){
 
 	isOK = mifare_desfire_des_auth2(cuid, key, dataout);
 
-	if( isOK) {
+	if (isOK) {
 		if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Authentication part2: Failed");
 		OnError(4);
 		return;
 	}
 
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
 	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();
 }