X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/92690507ab259c52f0bc54cd19acc88d46ec16e3..refs/pull/393/head:/armsrc/mifarecmd.c?ds=inline

diff --git a/armsrc/mifarecmd.c b/armsrc/mifarecmd.c
index 03e191e0..0e9c3672 100644
--- a/armsrc/mifarecmd.c
+++ b/armsrc/mifarecmd.c
@@ -14,20 +14,23 @@
 //-----------------------------------------------------------------------------
 
 #include "mifarecmd.h"
+
 #include "apps.h"
 #include "util.h"
-
-#include "des.h"
+#include "parity.h"
 #include "crc.h"
 
+#define AUTHENTICATION_TIMEOUT 848			// card times out 1ms after wrong authentication (according to NXP documentation)
+#define 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};
 
-
 //-----------------------------------------------------------------------------
-// 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)
@@ -37,7 +40,7 @@ void MifareReadBlock(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];
@@ -47,16 +50,16 @@ 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);
 
+	clear_trace();
+
 	LED_A_ON();
 	LED_B_OFF();
 	LED_C_OFF();
 
 	while (true) {
-		if(!iso14443a_select_card(uid, NULL, &cuid)) {
+		if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
 			break;
 		};
@@ -65,7 +68,7 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Auth error");
 			break;
 		};
-		
+
 		if(mifare_classic_readblock(pcs, cuid, blockNo, dataoutbuf)) {
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Read block error");
 			break;
@@ -75,14 +78,14 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
 			break;
 		};
-		
+
 		isOK = 1;
 		break;
 	}
-	
+
 	//  ----------------------------- crypto1 destroy
 	crypto1_destroy(pcs);
-	
+
 	if (MF_DBGLEVEL >= 2)	DbpString("READ BLOCK FINISHED");
 
 	LED_B_ON();
@@ -93,146 +96,78 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	LEDsoff();
 }
 
-void MifareUC_Auth1(uint8_t arg0, uint8_t *datain){
+void MifareUC_Auth(uint8_t arg0, uint8_t *keybytes){
 
-	byte_t dataoutbuf[16] = {0x00};
-	uint8_t uid[10] = {0x00};
-	uint32_t cuid = 0x00;
+	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(uid, NULL, &cuid)) {
+	clear_trace();
+
+	if(!iso14443a_select_card(NULL, NULL, NULL, true, 0)) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");
 		OnError(0);
 		return;
 	};
-	
-	if(mifare_ultra_auth1(dataoutbuf)){
-		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication part1: Fail.");
+
+	if(!mifare_ultra_auth(keybytes)){
+		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication failed");
 		OnError(1);
 		return;
 	}
 
-	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 1 FINISHED");
-    
-    cmd_send(CMD_ACK,1,cuid,0,dataoutbuf,11);
-	LEDsoff();
-}
-void MifareUC_Auth2(uint32_t arg0, uint8_t *datain){
-
-	uint8_t key[16] = {0x00};
-	byte_t dataoutbuf[16] = {0x00};
-    
-	memcpy(key, datain, 16);
-    
-	LED_A_ON();	LED_B_OFF(); LED_C_OFF();
-	
-	if(mifare_ultra_auth2(key, dataoutbuf)){
-	    if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication part2: Fail...");
-		OnError(1);
-		return;			
+	if (turnOffField) {
+		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+		LEDsoff();
 	}
-	
-	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 2 FINISHED");
-    
-	cmd_send(CMD_ACK,1,0,0,dataoutbuf,11);
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	LEDsoff();
+	cmd_send(CMD_ACK,1,0,0,0,0);
 }
 
+// Arg0 = BlockNo,
+// Arg1 = UsePwd bool
+// datain = PWD bytes,
 void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 {
 	uint8_t blockNo = arg0;
 	byte_t dataout[16] = {0x00};
-	uint8_t uid[10] = {0x00};
-	uint8_t key[16] = {0x00};
-	bool usePwd = (arg1 == 1);
+	bool useKey = (arg1 == 1); //UL_C
+	bool usePwd = (arg1 == 2); //UL_EV1/NTAG
 
-	LED_A_ON();	LED_B_OFF(); LED_C_OFF();
+	LEDsoff();
+	LED_A_ON();
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
 	clear_trace();
-	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	int len = iso14443a_select_card(uid, NULL, NULL);
+	int len = iso14443a_select_card(NULL, NULL, NULL, true, 0);
 	if(!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%02X)",len);
 		OnError(1);
 		return;
 	}
 
-	 // authenticate here.
-	if ( usePwd ) {
+	// UL-C authentication
+	if ( useKey ) {
+		uint8_t key[16] = {0x00};
+		memcpy(key, datain, sizeof(key) );
 
-		memcpy(key, datain, 16);
-
-		// Dbprintf("KEY: %02x %02x %02x %02x %02x %02x %02x %02x", key[0],key[1],key[2],key[3],key[4],key[5],key[6],key[7] );
-		// Dbprintf("KEY: %02x %02x %02x %02x %02x %02x %02x %02x", key[8],key[9],key[10],key[11],key[12],key[13],key[14],key[15] );
-
-		uint8_t a[8] = {1,1,1,1,1,1,1,1 };
-		uint8_t b[8] = {0x00};
-		uint8_t enc_b[8] = {0x00};
-		uint8_t ab[16] = {0x00};
-		uint8_t enc_ab[16] = {0x00};
-		uint8_t enc_key[8] = {0x00};
-		
-		uint16_t len;
-		uint8_t receivedAnswer[MAX_FRAME_SIZE];
-		uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
-
-		len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, receivedAnswer,receivedAnswerPar ,NULL);
-		if (len != 11) {
-			if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
+		if ( !mifare_ultra_auth(key) ) {
 			OnError(1);
 			return;
 		}
+	}
 
-		// tag nonce.
-		memcpy(enc_b,receivedAnswer+1,8);
-
-		// decrypt nonce.
-		tdes_2key_dec(b, enc_b, 8, key );
-
-		Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x", enc_b[0],enc_b[1],enc_b[2],enc_b[3],enc_b[4],enc_b[5],enc_b[6],enc_b[7] );
-		Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x", b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7] );
-		rol(b,8);
-		
-		memcpy(ab  ,a,8);
-		memcpy(ab+8,b,8);
-
-		Dbprintf("AB: %02x %02x %02x %02x %02x %02x %02x %02x", ab[0],ab[1],ab[2],ab[3],ab[4],ab[5],ab[6],ab[7] );
-		Dbprintf("AB: %02x %02x %02x %02x %02x %02x %02x %02x", ab[8],ab[9],ab[10],ab[11],ab[12],ab[13],ab[14],ab[15] );
-
-		// encrypt
-		tdes_2key_enc(enc_ab, ab, 16, key);
-
-		Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x", enc_ab[0],enc_ab[1],enc_ab[2],enc_ab[3],enc_ab[4],enc_ab[5],enc_ab[6],enc_ab[7] );
-		Dbprintf("e_enc_ab: %02x %02x %02x %02x %02x %02x %02x %02x", enc_ab[8],enc_ab[9],enc_ab[10],enc_ab[11],enc_ab[12],enc_ab[13],enc_ab[14],enc_ab[15] );
-
-		len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, enc_ab, receivedAnswer, receivedAnswerPar, NULL);
-		if (len != 11) {
-			if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
+	// UL-EV1 / NTAG authentication
+	if ( usePwd ) {
+		uint8_t pwd[4] = {0x00};
+		memcpy(pwd, datain, 4);
+		uint8_t pack[4] = {0,0,0,0};
+		if (!mifare_ul_ev1_auth(pwd, pack)) {
 			OnError(1);
 			return;
 		}
-
-		// the tags' encryption of our nonce, A.
-		memcpy(enc_key, receivedAnswer+1, 8);
-		
-		// clear B.
-		memset(b, 0x00, 8);
-
-		// decrypt 
-		tdes_2key_dec(b, enc_key, 8, key );
-		if ( memcmp(a, b, 8) == 0 )
-			Dbprintf("Verified key");
-		else
-			Dbprintf("failed authentication");
-		
-		Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x", a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7] );
-		Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x", b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7] );
 	}
 
 	if( mifare_ultra_readblock(blockNo, dataout) ) {
@@ -246,13 +181,14 @@ void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 		OnError(3);
 		return;
 	}
-	
+
 	cmd_send(CMD_ACK,1,0,0,dataout,16);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
 }
+
 //-----------------------------------------------------------------------------
-// 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)
@@ -262,7 +198,7 @@ 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];
@@ -272,27 +208,26 @@ 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)) {
 		isOK = 0;
 		if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
 	}
 
-	
+
 	if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST)) {
 		isOK = 0;
 		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;
@@ -300,14 +235,14 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 			break;
 		}
 	}
-		
+
 	if(mifare_classic_halt(pcs, cuid)) {
 		if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
 	}
 
 	//  ----------------------------- crypto1 destroy
 	crypto1_destroy(pcs);
-	
+
 	if (MF_DBGLEVEL >= 2) DbpString("READ SECTOR FINISHED");
 
 	LED_B_ON();
@@ -319,57 +254,105 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	LEDsoff();
 }
 
-void MifareUReadCard(uint8_t arg0, int arg1, uint8_t *datain)
+// arg0 = blockNo (start)
+// arg1 = Pages (number of blocks)
+// arg2 = useKey
+// datain = KEY bytes
+void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 {
-	// params
-	uint8_t sectorNo = arg0;
-	int Pages = arg1;
-	int countpages = 0;
-	byte_t dataout[176] = {0x00};;
-
 	LEDsoff();
 	LED_A_ON();
-	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	int len = iso14443a_select_card(NULL, NULL, NULL);
+	// free eventually allocated BigBuf memory
+	BigBuf_free();
+	clear_trace();
+
+	// params
+	uint8_t blockNo = arg0;
+	uint16_t blocks = arg1;
+	bool useKey = (arg2 == 1); //UL_C
+	bool usePwd = (arg2 == 2); //UL_EV1/NTAG
+	uint32_t countblocks = 0;
+	uint8_t *dataout = BigBuf_malloc(CARD_MEMORY_SIZE);
+	if (dataout == NULL){
+		Dbprintf("out of memory");
+		OnError(1);
+		return;
+	}
+
+	int len = iso14443a_select_card(NULL, NULL, NULL, true, 0);
 	if (!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%d)",len);
 		OnError(1);
 		return;
 	}
-	
-	for (int i = 0; i < Pages; i++){
-	
-		len = mifare_ultra_readblock(sectorNo * 4 + i, dataout + 4 * i);
-		
+
+	// UL-C authentication
+	if ( useKey ) {
+		uint8_t key[16] = {0x00};
+		memcpy(key, datain, sizeof(key) );
+
+		if ( !mifare_ultra_auth(key) ) {
+			OnError(1);
+			return;
+		}
+	}
+
+	// UL-EV1 / NTAG authentication
+	if (usePwd) {
+		uint8_t pwd[4] = {0x00};
+		memcpy(pwd, datain, sizeof(pwd));
+		uint8_t pack[4] = {0,0,0,0};
+
+		if (!mifare_ul_ev1_auth(pwd, pack)){
+			OnError(1);
+			return;
+		}
+	}
+
+	for (int i = 0; i < blocks; i++){
+		if ((i*4) + 4 >= CARD_MEMORY_SIZE) {
+			Dbprintf("Data exceeds buffer!!");
+			break;
+		}
+
+		len = mifare_ultra_readblock(blockNo + i, dataout + 4 * i);
+
 		if (len) {
 			if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Read block %d error",i);
-			OnError(2);
-			return;
+			// if no blocks read - error out
+			if (i==0){
+				OnError(2);
+				return;
+			} else {
+				//stop at last successful read block and return what we got
+				break;
+			}
 		} else {
-			countpages++;
+			countblocks++;
 		}
 	}
-		
+
 	len = mifare_ultra_halt();
 	if (len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Halt error");
 		OnError(3);
 		return;
 	}
-	
-	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Pages read %d", countpages);
 
-	len = Pages * 4;
+	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Blocks read %d", countblocks);
 
-	cmd_send(CMD_ACK, 1, 0, 0, dataout, len);	
+	countblocks *= 4;
+
+	cmd_send(CMD_ACK, 1, countblocks, BigBuf_max_traceLen(), 0, 0);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
+	BigBuf_free();
 }
 
 //-----------------------------------------------------------------------------
-// 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)
@@ -382,7 +365,7 @@ 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];
@@ -391,17 +374,16 @@ 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(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
 			break;
 		};
@@ -410,7 +392,7 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Auth error");
 			break;
 		};
-		
+
 		if(mifare_classic_writeblock(pcs, cuid, blockNo, blockdata)) {
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Write block error");
 			break;
@@ -420,14 +402,14 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
 			break;
 		};
-		
+
 		isOK = 1;
 		break;
 	}
-	
+
 	//  ----------------------------- crypto1 destroy
 	crypto1_destroy(pcs);
-	
+
 	if (MF_DBGLEVEL >= 2)	DbpString("WRITE BLOCK FINISHED");
 
 	LED_B_ON();
@@ -440,7 +422,8 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	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};
@@ -454,13 +437,13 @@ 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;	};
@@ -477,27 +460,58 @@ void MifareUWriteBlock(uint8_t arg0, uint8_t *datain)
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
 }
-
-void MifareUWriteBlock_Special(uint8_t arg0, uint8_t *datain)
+*/
+
+// Arg0   : Block to write to.
+// Arg1   : 0 = use no authentication.
+//          1 = use 0x1A authentication.
+//          2 = use 0x1B authentication.
+// datain : 4 first bytes is data to be written.
+//        : 4/16 next bytes is authentication key.
+void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 {
 	uint8_t blockNo = arg0;
+	bool useKey = (arg1 == 1); //UL_C
+	bool usePwd = (arg1 == 2); //UL_EV1/NTAG
 	byte_t blockdata[4] = {0x00};
-	
+
 	memcpy(blockdata, datain,4);
 
-	uint8_t uid[10] = {0x00};
-	
-	LED_A_ON(); LED_B_OFF(); LED_C_OFF();
-	clear_trace();
+	LEDsoff();
+	LED_A_ON();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	if(!iso14443a_select_card(uid, NULL, NULL)) {
+	clear_trace();
+
+	if(!iso14443a_select_card(NULL, NULL, NULL, true, 0)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 		OnError(0);
 		return;
 	};
 
-	if(mifare_ultra_special_writeblock(blockNo, blockdata)) {
+	// UL-C authentication
+	if ( useKey ) {
+		uint8_t key[16] = {0x00};
+		memcpy(key, datain+4, sizeof(key) );
+
+		if ( !mifare_ultra_auth(key) ) {
+			OnError(1);
+			return;
+		}
+	}
+
+	// UL-EV1 / NTAG authentication
+	if (usePwd) {
+		uint8_t pwd[4] = {0x00};
+		memcpy(pwd, datain+4, 4);
+		uint8_t pack[4] = {0,0,0,0};
+		if (!mifare_ul_ev1_auth(pwd, pack)) {
+			OnError(1);
+			return;
+		}
+	}
+
+	if(mifare_ultra_writeblock(blockNo, blockdata)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");
 		OnError(0);
 		return;
@@ -517,17 +531,18 @@ void MifareUWriteBlock_Special(uint8_t arg0, uint8_t *datain)
 }
 
 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)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 		OnError(0);
 		return;
@@ -537,7 +552,7 @@ 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;
@@ -547,7 +562,7 @@ 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;
@@ -557,7 +572,7 @@ 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;
@@ -567,11 +582,11 @@ 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");
@@ -586,15 +601,144 @@ void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 
 // 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 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();
+	LED_C_OFF();
+
+	if (initialize) {
+		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+		clear_trace();
+		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; ) {
+
+		// 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)) {
+				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)) {
+				if (MF_DBGLEVEL >= 1)	Dbprintf("AcquireNonces: Can't select card (UID)");
+				continue;
+			}
+		}
+
+		if (slow) {
+			timeout = GetCountSspClk() + PRE_AUTHENTICATION_LEADTIME;
+			while(GetCountSspClk() < timeout);
+		}
+
+		uint32_t nt1;
+		if (mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, 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 a dummy byte as reader response in order to trigger the cards authentication timeout
+		uint8_t dummy_answer = 0;
+		ReaderTransmit(&dummy_answer, 1, NULL);
+		timeout = GetCountSspClk() + 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);
+
+	}
+
+	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();
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// MIFARE nested authentication.
+//
 //-----------------------------------------------------------------------------
 void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *datain)
 {
@@ -606,7 +750,7 @@ 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;
@@ -615,7 +759,7 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 	uint32_t cuid, nt1, nt2, nttmp, nttest, ks1;
 	uint8_t par[1];
 	uint32_t target_nt[2], target_ks[2];
-	
+
 	uint8_t par_array[4];
 	uint16_t ncount = 0;
 	struct Crypto1State mpcs = {0, 0};
@@ -626,19 +770,20 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 	uint32_t auth1_time, auth2_time;
 	static uint16_t delta_time;
 
-	// free eventually allocated BigBuf memory
-	BigBuf_free();
-	// clear trace
-	clear_trace();
-	set_tracing(false);
-	
-	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
-
 	LED_A_ON();
 	LED_C_OFF();
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
+	// free eventually allocated BigBuf memory
+	BigBuf_free();
 
+	if (calibrate) clear_trace();
+	set_tracing(true);
 
 	// statistics on nonce distance
+	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();
 		WDT_HIT();
@@ -646,9 +791,15 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 		davg = dmax = 0;
 		dmin = 2000;
 		delta_time = 0;
-		
+
 		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");
@@ -656,7 +807,7 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 				continue;
 			}
 
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
+			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {
 				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Can't select card");
 				rtr--;
 				continue;
@@ -696,42 +847,45 @@ 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
-		
+
 			// prepare next select. No need to power down the card.
 			if(mifare_classic_halt(pcs, cuid)) {
 				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Halt error");
 				continue;
 			}
 
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
+			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {
 				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");
@@ -740,20 +894,20 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 
 			// 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);
 				continue;
 			};
-		
-			nt2 = bytes_to_num(receivedAnswer, 4);		
+
+			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]);
-			
+
 			// 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++) {
@@ -782,41 +936,42 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 	}
 
 	LED_C_OFF();
-	
+
 	//  ----------------------------- crypto1 destroy
 	crypto1_destroy(pcs);
-	
+
 	byte_t buf[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));
+	cmd_send(CMD_ACK, isOK, 0, targetBlockNo + (targetKeyType * 0x100), buf, sizeof(buf));
 	LED_B_OFF();
 
 	if (MF_DBGLEVEL >= 3)	DbpString("NESTED FINISHED");
 
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
-	set_tracing(TRUE);
 }
 
 //-----------------------------------------------------------------------------
-// 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)
+void MifareChkKeys(uint16_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 {
-  // params
-	uint8_t blockNo = arg0;
-	uint8_t keyType = arg1;
+	uint8_t blockNo = arg0 & 0xff;
+	uint8_t keyType = (arg0 >> 8) & 0xff;
+	bool clearTrace = arg1;
 	uint8_t keyCount = arg2;
 	uint64_t ui64Key = 0;
-	
-	// variables
+
+	bool have_uid = false;
+	uint8_t cascade_levels = 0;
+	uint32_t timeout = 0;
 	int i;
 	byte_t isOK = 0;
 	uint8_t uid[10];
@@ -824,43 +979,62 @@ void MifareChkKeys(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	struct Crypto1State mpcs = {0, 0};
 	struct Crypto1State *pcs;
 	pcs = &mpcs;
-	
+
 	// clear debug level
-	int OLD_MF_DBGLEVEL = MF_DBGLEVEL;	
+	int OLD_MF_DBGLEVEL = MF_DBGLEVEL;
 	MF_DBGLEVEL = MF_DBG_NONE;
-	
-	// clear trace
-	clear_trace();
-	set_tracing(TRUE);
-
-	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
 	LED_A_ON();
 	LED_B_OFF();
 	LED_C_OFF();
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+
+	if (clearTrace) clear_trace();
+	set_tracing(true);
 
 	for (i = 0; i < keyCount; i++) {
-		if(mifare_classic_halt(pcs, cuid)) {
-			if (MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Halt error");
+//		if(mifare_classic_halt(pcs, cuid)) {
+//			if (MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Halt error");
+//		}
+
+		// Iceman: use piwi's faster nonce collecting part in hardnested.
+		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)) {
+				if (OLD_MF_DBGLEVEL >= 1) 	Dbprintf("ChkKeys: Can't select card");
+				--i; // try same key once again
+				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)) {
+				if (OLD_MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Can't select card (UID)");
+				--i; // try same key once again
+				continue;
+			}
 		}
 
-		if(!iso14443a_select_card(uid, NULL, &cuid)) {
-			if (OLD_MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Can't select card");
-			break;
-		};
-
 		ui64Key = bytes_to_num(datain + i * 6, 6);
 		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
+			uint8_t dummy_answer = 0;
+			ReaderTransmit(&dummy_answer, 1, NULL);
+			timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;
+
+			// wait for the card to become ready again
+			while(GetCountSspClk() < timeout);
 			continue;
-		};
-		
+		}
+
 		isOK = 1;
 		break;
 	}
-	
-	//  ----------------------------- crypto1 destroy
-	crypto1_destroy(pcs);
-	
+
 	LED_B_ON();
     cmd_send(CMD_ACK,isOK,0,0,datain + i * 6,6);
 	LED_B_OFF();
@@ -869,12 +1043,12 @@ void MifareChkKeys(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	LEDsoff();
 
 	// restore debug level
-	MF_DBGLEVEL = OLD_MF_DBGLEVEL;	
+	MF_DBGLEVEL = OLD_MF_DBGLEVEL;
 }
 
 //-----------------------------------------------------------------------------
 // MIFARE commands set debug level
-// 
+//
 //-----------------------------------------------------------------------------
 void MifareSetDbgLvl(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
 	MF_DBGLEVEL = arg0;
@@ -883,17 +1057,24 @@ 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)
 
@@ -904,7 +1085,7 @@ 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;
@@ -920,23 +1101,21 @@ 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)) {
 		isOK = false;
 		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){
@@ -952,7 +1131,7 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 				break;
 			}
 		}
-		
+
 		for (uint8_t blockNo = 0; isOK && blockNo < NumBlocksPerSector(sectorNo); blockNo++) {
 			if(isOK && mifare_classic_readblock(pcs, cuid, FirstBlockOfSector(sectorNo) + blockNo, dataoutbuf)) {
 				isOK = false;
@@ -981,7 +1160,7 @@ 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");
 
 }
@@ -989,10 +1168,10 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 
 //-----------------------------------------------------------------------------
 // Work with "magic Chinese" card (email him: ouyangweidaxian@live.cn)
-// 
+//
 //-----------------------------------------------------------------------------
 void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){
-  
+
   // params
 	uint8_t needWipe = arg0;
 	// bit 0 - need get UID
@@ -1000,20 +1179,21 @@ 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];
 
@@ -1022,29 +1202,31 @@ 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(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {
 				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(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");
@@ -1058,51 +1240,61 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 			};
 
 			if(mifare_classic_halt(NULL, cuid)) {
-				if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");
-				break;
+				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 0x0a 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");
+					break;
+				};
+
+				ReaderTransmit(wupC2, sizeof(wupC2), NULL);
+				if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
+					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");
 			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");
 			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, cuid)) {
+					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();
@@ -1115,35 +1307,37 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 
 
 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) {
@@ -1152,14 +1346,16 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
 				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");
 				break;
 			};
 		}
+	}
 
 		// read block
 		if ((mifare_sendcmd_short(NULL, 0, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 18)) {
@@ -1167,20 +1363,29 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 			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);
+	if (workFlags & 0x20) {
+		if (isOK)
+			memcpy(datain, data, 18);
+	}
+	else
+		cmd_send(CMD_ACK,isOK,0,0,data,18);
 	LED_B_OFF();
 
 	if ((workFlags & 0x10) || (!isOK)) {
@@ -1190,35 +1395,34 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 }
 
 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];
 
 	ReaderTransmitBitsPar(wupC1,7,0, NULL);
-	if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {
-		isOK = 0;
-	};
+	if(ReaderReceive(receivedAnswer, receivedAnswerPar) && (receivedAnswer[0] == 0x0a)) {
+		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] == 0x0a)) {
+			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);
 
 	cmd_send(CMD_ACK,isOK,0,0,0,0);
 }
 
-			//
+//
 // DESFIRE
 //
 
@@ -1227,27 +1431,24 @@ 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);
 	if(!len) {
-		if (MF_DBGLEVEL >= MF_DBG_ERROR)	
-			Dbprintf("Can't select card");
-		//OnError(1);
+		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");
+		OnError(1);
 		return;
 	};
 
 	if(mifare_desfire_des_auth1(cuid, dataout)){
-		if (MF_DBGLEVEL >= MF_DBG_ERROR)	
-			Dbprintf("Authentication part1: Fail.");
-		//OnError(4);
+		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication part1: Fail.");
+		OnError(4);
 		return;
 	}
 
 	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 1 FINISHED");
-    
     cmd_send(CMD_ACK,1,cuid,0,dataout, sizeof(dataout));
 }
 
@@ -1257,20 +1458,18 @@ 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 (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Authentication part2: Failed");
+		OnError(4);
 		return;
 	}
 
-	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) 
-		DbpString("AUTH 2 FINISHED");
+	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);