X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/aa60d1560ece20fe93fb22f9ee60c897e96f2b42..e16054a468a615abb805322b085e365caadf3196:/armsrc/mifarecmd.c?ds=sidebyside

diff --git a/armsrc/mifarecmd.c b/armsrc/mifarecmd.c
index a240bed4..0b75ebc3 100644
--- a/armsrc/mifarecmd.c
+++ b/armsrc/mifarecmd.c
@@ -16,8 +16,6 @@
 #include "mifarecmd.h"
 #include "apps.h"
 #include "util.h"
-//#include "../client/loclass/des.h"
-#include "des.h"
 #include "crc.h"
 
 //-----------------------------------------------------------------------------
@@ -41,10 +39,10 @@ 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();
@@ -87,165 +85,97 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	LEDsoff();
 }
 
+void MifareUC_Auth(uint8_t arg0, uint8_t *keybytes){
 
-void MifareUC_Auth1(uint8_t arg0, uint8_t *datain){
-
-	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)) {
 		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);
-	
-	LED_A_ON();	LED_B_OFF(); LED_C_OFF();
-    
-	clear_trace();
+	bool useKey = (arg1 == 1); //UL_C
+	bool usePwd = (arg1 == 2); //UL_EV1/NTAG
+
+	LEDsoff();
+	LED_A_ON();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
-    
-	int len = iso14443a_select_card(uid, NULL, NULL);
+
+	clear_trace();
+
+	int len = iso14443a_select_card(NULL, NULL, NULL);
 	if(!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%02X)",len);
 		OnError(1);
 		return;
 	}
-       
-	 // authenticate here.
-	if ( usePwd ) {
-		
-		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]);
+
+	// UL-C authentication
+	if ( useKey ) {
+		uint8_t key[16] = {0x00};
+		memcpy(key, datain, sizeof(key) );
+
+		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) ) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Read block error");
 		OnError(2);
 		return;
 	}
-        
+
 	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();
 }
+
 //-----------------------------------------------------------------------------
 // Select, Authenticate, Read a MIFARE tag. 
 // read sector (data = 4 x 16 bytes = 64 bytes, or 16 x 16 bytes = 256 bytes)
@@ -267,11 +197,10 @@ 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();
@@ -281,7 +210,7 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 		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;
@@ -314,60 +243,103 @@ 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};;
-	uint32_t cuid = 0x00;
+	LEDsoff();
+	LED_A_ON();
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	LED_A_ON(); LED_B_OFF(); LED_C_OFF();
+	// free eventually allocated BigBuf memory
+	BigBuf_free();
 	clear_trace();
-	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	int len = iso14443a_select_card(NULL, NULL, &cuid);
+	// 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);
 	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);
+			// 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_ALL) Dbprintf("Pages read %d", countpages);
 
-	len = 16*4; //64 bytes
+	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Blocks read %d", countblocks);
 
-	// Read a UL-C
-	if (Pages == 44 && countpages > 16) 
-		len = 176;
+	countblocks *= 4;
 
-	cmd_send(CMD_ACK, 1, 0, 0, dataout, len);	
+	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. 
 // read block
@@ -391,11 +363,10 @@ 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();
@@ -440,17 +411,18 @@ 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;
+	uint8_t blockNo = arg0;
 	byte_t blockdata[16] = {0x00};
 
-    memcpy(blockdata, datain, 16);
-        
+	memcpy(blockdata, datain, 16);
+
 	uint8_t uid[10] = {0x00};
 
 	LED_A_ON(); LED_B_OFF(); LED_C_OFF();
-		
+
 	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
@@ -460,7 +432,7 @@ void MifareUWriteBlock(uint8_t arg0, uint8_t *datain)
 		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;	};
@@ -470,34 +442,65 @@ void MifareUWriteBlock(uint8_t arg0, uint8_t *datain)
 		OnError(0);
 		return;
 	};
-		
+
 	if (MF_DBGLEVEL >= 2)   DbpString("WRITE BLOCK FINISHED");
 
 	cmd_send(CMD_ACK,1,0,0,0,0);
 	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};
+	memcpy(blockdata, datain,4);
 	
-	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)) {
 		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;
@@ -524,9 +527,10 @@ void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 	memcpy(pwd, datain, 16);
 	
 	LED_A_ON(); LED_B_OFF(); LED_C_OFF();
-	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
+	clear_trace();
+
 	if(!iso14443a_select_card(NULL, NULL, NULL)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 		OnError(0);
@@ -537,7 +541,7 @@ 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 +551,7 @@ 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 +561,7 @@ 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;
@@ -567,7 +571,7 @@ 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;
@@ -626,19 +630,20 @@ 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();
@@ -649,6 +654,12 @@ 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");
@@ -696,27 +707,29 @@ 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
@@ -740,7 +753,7 @@ 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;
@@ -794,25 +807,26 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 	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);
+	set_tracing(FALSE);
 }
 
 //-----------------------------------------------------------------------------
 // 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;
 	
@@ -829,15 +843,13 @@ void MifareChkKeys(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	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)) {
@@ -867,7 +879,8 @@ void MifareChkKeys(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
-
+	set_tracing(FALSE);
+	
 	// restore debug level
 	MF_DBGLEVEL = OLD_MF_DBGLEVEL;	
 }
@@ -884,16 +897,24 @@ 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){
-	emlSetMem(datain, arg0, arg1); // data, block num, blocks count
+	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+	//emlSetMem(datain, arg0, arg1); // data, block num, blocks count	 
+	emlSetMem_xt(datain, arg0, arg1, arg2); // data, block num, blocks count, block byte width
 }
 
 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)
 
@@ -920,15 +941,13 @@ 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(TRUE);
 	
 	bool isOK = true;
 
@@ -984,6 +1003,7 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 	
 	if (MF_DBGLEVEL >= 2) DbpString("EMUL FILL SECTORS FINISHED");
 
+	set_tracing(FALSE);
 }
 
 
@@ -1022,10 +1042,10 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		LED_A_ON();
 		LED_B_OFF();
 		LED_C_OFF();
+		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 	
 		clear_trace();
 		set_tracing(TRUE);
-		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 	}
 
 	while (true) {
@@ -1110,6 +1130,7 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 	if ((workFlags & 0x10) || (!isOK)) {
 		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 		LEDsoff();
+		set_tracing(FALSE);
 	}
 }
 
@@ -1121,6 +1142,7 @@ void MifareCGetBlock(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 5 - need to set datain instead of issuing USB reply (called via ARM for StandAloneMode14a)
 	uint8_t workFlags = arg0;
 	uint8_t blockNo = arg2;
 	
@@ -1140,10 +1162,10 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 		LED_A_ON();
 		LED_B_OFF();
 		LED_C_OFF();
+		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 	
 		clear_trace();
 		set_tracing(TRUE);
-		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 	}
 
 	while (true) {
@@ -1180,12 +1202,18 @@ void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 	}
 	
 	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();
 
 	if ((workFlags & 0x10) || (!isOK)) {
 		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 		LEDsoff();
+		set_tracing(FALSE);
 	}
 }
 
@@ -1218,7 +1246,75 @@ void MifareCIdent(){
 	cmd_send(CMD_ACK,isOK,0,0,0,0);
 }
 
-			//
+void MifareCollectNonces(uint32_t arg0, uint32_t arg1){
+
+	BigBuf_free();
+
+	uint32_t iterations = arg0;
+	uint8_t uid[10] = {0x00};
+
+	uint8_t *response = BigBuf_malloc(MAX_MIFARE_FRAME_SIZE);
+	uint8_t *responsePar = BigBuf_malloc(MAX_MIFARE_PARITY_SIZE);
+
+	uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b };
+	
+	// get memory from BigBuf.
+	uint8_t *nonces = BigBuf_malloc(iterations * 4);
+
+	LED_A_ON();
+	LED_B_OFF();
+	LED_C_OFF();
+	
+	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+	clear_trace();
+	set_tracing(TRUE);
+		
+	for (int i = 0; i < iterations; i++) {
+						
+		WDT_HIT();
+
+		// Test if the action was cancelled
+		if(BUTTON_PRESS()) break;
+		
+		//		if(mifare_classic_halt(pcs, cuid)) {
+		//			if (MF_DBGLEVEL >= 1) Dbprintf("Halt error");
+		//}
+
+		if(!iso14443a_select_card(uid, NULL, NULL)) {
+			if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
+			continue;
+		};
+
+		// Transmit MIFARE_CLASSIC_AUTH.
+		ReaderTransmit(mf_auth, sizeof(mf_auth), NULL);
+
+		// Receive the (4 Byte) "random" nonce
+		if (!ReaderReceive(response, responsePar)) {
+			if (MF_DBGLEVEL >= 1)	Dbprintf("Couldn't receive tag nonce");
+			continue;
+		}	
+		
+		nonces[i*4] = bytes_to_num(response, 4);
+	}
+		
+	int packLen =  iterations * 4;
+	int packSize = 0;
+	int packNum = 0;
+	while (packLen > 0) {
+		packSize = MIN(USB_CMD_DATA_SIZE, packLen);
+		LED_B_ON();
+		cmd_send(CMD_ACK, 77, 0, packSize, nonces - packLen, packSize);
+		LED_B_OFF();
+
+		packLen -= packSize;
+		packNum++;
+	}
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	LEDsoff();
+	set_tracing(FALSE);
+}
+
+//
 // DESFIRE
 //
 
@@ -1228,8 +1324,8 @@ void Mifare_DES_Auth1(uint8_t arg0, uint8_t *datain){
 	uint8_t uid[10] = {0x00};
 	uint32_t cuid = 0x00;
     
-	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
+	clear_trace();
 
 	int len = iso14443a_select_card(uid, NULL, &cuid);
 	if(!len) {
@@ -1270,4 +1366,4 @@ void Mifare_DES_Auth2(uint32_t arg0, uint8_t *datain){
 	cmd_send(CMD_ACK, isOK, 0, 0, dataout, sizeof(dataout));
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
-}
+}
\ No newline at end of file