X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/94ad01bfba1c29747f9c42942bbec6b834695ef2..3ad48540d4d77f50cc62d16acb78f17019ef431d:/armsrc/iclass.c

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index 7289abbc..017d5eff 100644
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -41,10 +41,12 @@
 #include "util.h"
 #include "string.h"
 #include "common.h"
+#include "cmd.h"
 // Needed for CRC in emulation mode;
 // same construction as in ISO 14443;
 // different initial value (CRC_ICLASS)
 #include "iso14443crc.h"
+#include "iso15693tools.h"
 
 static int timeout = 4096;
 
@@ -669,6 +671,8 @@ void RAMFUNC SnoopIClass(void)
     // The response (tag -> reader) that we're receiving.
 	uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
 
+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ 
     // reset traceLen to 0
     iso14a_set_tracing(TRUE);
     iso14a_clear_trace();
@@ -954,7 +958,7 @@ static void CodeIClassTagSOF()
 	// Convert from last byte pos to length
 	ToSendMax++;
 }
-
+int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
 /**
  * @brief SimulateIClass simulates an iClass card.
  * @param arg0 type of simulation
@@ -971,43 +975,49 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
 {
 	uint32_t simType = arg0;
 	uint32_t numberOfCSNS = arg1;
+	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
 	// Enable and clear the trace
 	iso14a_set_tracing(TRUE);
 	iso14a_clear_trace();
 
 	uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
-
 	if(simType == 0) {
 		// Use the CSN from commandline
 		memcpy(csn_crc, datain, 8);
-		doIClassSimulation(csn_crc,0);
+		doIClassSimulation(csn_crc,0,NULL);
 	}else if(simType == 1)
 	{
-		doIClassSimulation(csn_crc,0);
+		doIClassSimulation(csn_crc,0,NULL);
 	}
 	else if(simType == 2)
 	{
+
+		uint8_t mac_responses[64] = { 0 };
 		Dbprintf("Going into attack mode");
 		// In this mode, a number of csns are within datain. We'll simulate each one, one at a time
 		// in order to collect MAC's from the reader. This can later be used in an offlne-attack
 		// in order to obtain the keys, as in the "dismantling iclass"-paper.
-		for(int i = 0 ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++)
+		int i = 0;
+		for( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++)
 		{
 			// The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
 
 			memcpy(csn_crc, datain+(i*8), 8);
-			if(doIClassSimulation(csn_crc,1))
+			if(doIClassSimulation(csn_crc,1,mac_responses))
 			{
 				return; // Button pressed
 			}
 		}
+		cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
+
 	}
 	else{
 		// We may want a mode here where we hardcode the csns to use (from proxclone).
 		// That will speed things up a little, but not required just yet.
 		Dbprintf("The mode is not implemented, reserved for future use");
 	}
+	Dbprintf("Done...");
 
 }
 /**
@@ -1015,9 +1025,10 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
  * @param csn - csn to use
  * @param breakAfterMacReceived if true, returns after reader MAC has been received.
  */
-int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
+int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
 {
 
+
 	// CSN followed by two CRC bytes
 	uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 	uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
@@ -1092,10 +1103,11 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 
 
 	// Start from off (no field generated)
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	SpinDelay(200);
-
-
+	//FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	//SpinDelay(200);
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+	SpinDelay(100);
+	StartCountSspClk();
 	// We need to listen to the high-frequency, peak-detected path.
 	SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 	FpgaSetupSsc();
@@ -1107,10 +1119,14 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 	uint32_t r2t_time =0;
 
 	LED_A_ON();
-	bool displayDebug = true;
 	bool buttonPressed = false;
+
+	/** Hack  for testing
+	memcpy(reader_mac_buf,csn,8);
+	exitLoop = true;
+	end hack **/
+
 	while(!exitLoop) {
-		displayDebug = true;
 
 		LED_B_OFF();
 		//Signal tracer
@@ -1131,13 +1147,11 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 			resp = resp1; respLen = resp1Len; //order = 1;
 			respdata = &sof;
 			respsize = sizeof(sof);
-			displayDebug = false;
 		} else if(receivedCmd[0] == 0x0c) {
 			// Reader asks for anticollission CSN
 			resp = resp2; respLen = resp2Len; //order = 2;
 			respdata = response2;
 			respsize = sizeof(response2);
-			//displayDebug = false;
 			//DbpString("Reader requests anticollission CSN:");
 		} else if(receivedCmd[0] == 0x81) {
 			// Reader selects anticollission CSN.
@@ -1162,11 +1176,15 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 			if (breakAfterMacReceived){
 				// TODO, actually return this to the caller instead of just
 				// dbprintf:ing ...
-				Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x");
+				Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
 				Dbprintf("RDR:  (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
 						 receivedCmd[0], receivedCmd[1], receivedCmd[2],
 						receivedCmd[3], receivedCmd[4], receivedCmd[5],
 						receivedCmd[6], receivedCmd[7], receivedCmd[8]);
+				if (reader_mac_buf != NULL)
+				{
+					memcpy(reader_mac_buf,receivedCmd+1,8);
+				}
 				exitLoop = true;
 			}
 		} else if(receivedCmd[0] == 0x00 && len == 1) {
@@ -1190,7 +1208,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 
 		if(cmdsRecvd >  100) {
 			//DbpString("100 commands later...");
-			break;
+			//break;
 		}
 		else {
 			cmdsRecvd++;
@@ -1199,29 +1217,13 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 		if(respLen > 0) {
 			SendIClassAnswer(resp, respLen, 21);
 			t2r_time = GetCountSspClk();
-
-//			}
-			if(displayDebug) Dbprintf("R2T:(len=%d): %x %x %x %x %x %x %x %x %x\nT2R: (total/data =%d/%d): %x %x %x %x %x %x %x %x %x",
-			len,
-			receivedCmd[0], receivedCmd[1], receivedCmd[2],
-			receivedCmd[3], receivedCmd[4], receivedCmd[5],
-			receivedCmd[6], receivedCmd[7], receivedCmd[8],
-			respLen,respsize,
-			resp[0], resp[1], resp[2],
-			resp[3], resp[4], resp[5],
-			resp[6], resp[7], resp[8]);
-
 		}
 
 		if (tracing) {
-			//LogTrace(receivedCmd,len, rsamples, Uart.parityBits, TRUE);
-
 			LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, Uart.parityBits,TRUE);
 			LogTrace(NULL,0, (r2t_time-time_0) << 4, 0,TRUE);
 
 			if (respdata != NULL) {
-				//LogTrace(respdata,respsize, rsamples, SwapBits(GetParity(respdata,respsize),respsize), FALSE);
-				//if(!LogTrace(resp,respLen, rsamples,SwapBits(GetParity(respdata,respsize),respsize),FALSE))
 				LogTrace(respdata,respsize, (t2r_time-time_0) << 4,SwapBits(GetParity(respdata,respsize),respsize),FALSE);
 				LogTrace(NULL,0, (t2r_time-time_0) << 4,0,FALSE);
 
@@ -1236,7 +1238,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 		memset(receivedCmd, 0x44, RECV_CMD_SIZE);
 	}
 
-	Dbprintf("%x", cmdsRecvd);
+	//Dbprintf("%x", cmdsRecvd);
 	LED_A_OFF();
 	LED_B_OFF();
 	if(buttonPressed)
@@ -1473,6 +1475,8 @@ void ReaderIClass(uint8_t arg0) {
 
 	uint8_t* resp = (((uint8_t *)BigBuf) + 3560);	// was 3560 - tied to other size changes
 
+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+
 	// Reset trace buffer
 	memset(trace, 0x44, RECV_CMD_OFFSET);
 	traceLen = 0;
@@ -1528,4 +1532,370 @@ void ReaderIClass(uint8_t arg0) {
 	LED_A_OFF();
 }
 
+void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
+	uint8_t act_all[]     = { 0x0a };
+	uint8_t identify[]    = { 0x0c };
+	uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	uint8_t readcheck_cc[]= { 0x88, 0x02 };
+	uint8_t check[]       = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	uint8_t read[]        = { 0x0c, 0x00, 0x00, 0x00 };
+	
+    uint16_t crc = 0;
+	uint8_t cardsize=0;
+	bool read_success=false;
+	uint8_t mem=0;
+	
+	static struct memory_t{
+	  int k16;
+	  int book;
+	  int k2;
+	  int lockauth;
+	  int keyaccess;
+	} memory;
+	
+	uint8_t* resp = (((uint8_t *)BigBuf) + 3560);	// was 3560 - tied to other size changes
+
+	// Reset trace buffer
+    memset(trace, 0x44, RECV_CMD_OFFSET);
+	traceLen = 0;
+
+	// Setup SSC
+	FpgaSetupSsc();
+	// Start from off (no field generated)
+	// Signal field is off with the appropriate LED
+	LED_D_OFF();
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	SpinDelay(200);
+
+	SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+	// Now give it time to spin up.
+	// Signal field is on with the appropriate LED
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
+	SpinDelay(200);
+
+	LED_A_ON();
+
+	for(int i=0;i<1;i++) {
+	
+		if(traceLen > TRACE_SIZE) {
+			DbpString("Trace full");
+			break;
+		}
+		
+		if (BUTTON_PRESS()) break;
+
+		// Send act_all
+		ReaderTransmitIClass(act_all, 1);
+		// Card present?
+		if(ReaderReceiveIClass(resp)) {
+			ReaderTransmitIClass(identify, 1);
+			if(ReaderReceiveIClass(resp) == 10) {
+				// Select card          
+				memcpy(&select[1],resp,8);
+				ReaderTransmitIClass(select, sizeof(select));
+
+				if(ReaderReceiveIClass(resp) == 10) {
+					Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],
+					resp[3], resp[4], resp[5],
+					resp[6], resp[7]);
+				}
+				// Card selected
+				Dbprintf("Readcheck on Sector 2");
+				ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
+				if(ReaderReceiveIClass(resp) == 8) {
+				   Dbprintf("     CC: %02x %02x %02x %02x %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],
+					resp[3], resp[4], resp[5],
+					resp[6], resp[7]);
+				}else return;
+				Dbprintf("Authenticate");
+				//for now replay captured auth (as cc not updated)
+				memcpy(check+5,MAC,4);
+				Dbprintf("     AA: %02x %02x %02x %02x",
+					check[5], check[6], check[7],check[8]);
+				ReaderTransmitIClass(check, sizeof(check));
+				if(ReaderReceiveIClass(resp) == 4) {
+				   Dbprintf("     AR: %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],resp[3]);
+				}else {
+				  Dbprintf("Error: Authentication Fail!");
+				  return;
+				}
+				Dbprintf("Dump Contents");
+				//first get configuration block
+				read_success=false;
+				read[1]=1;
+				uint8_t *blockno=&read[1];
+				crc = iclass_crc16((char *)blockno,1);
+				read[2] = crc >> 8;
+				read[3] = crc & 0xff;
+				while(!read_success){
+				      ReaderTransmitIClass(read, sizeof(read));
+				      if(ReaderReceiveIClass(resp) == 10) {
+					 read_success=true;
+					 mem=resp[5];
+					 memory.k16= (mem & 0x80);
+					 memory.book= (mem & 0x20);
+					 memory.k2= (mem & 0x8);
+					 memory.lockauth= (mem & 0x2);
+					 memory.keyaccess= (mem & 0x1);
+
+				      }
+				}
+				if (memory.k16){
+				  cardsize=255;
+				}else cardsize=32;
+				//then loop around remaining blocks
+				for(uint8_t j=0; j<cardsize; j++){
+				    read_success=false;
+				    uint8_t *blockno=&j;
+				    //crc_data[0]=j;
+				    read[1]=j;
+				    crc = iclass_crc16((char *)blockno,1);
+				    read[2] = crc >> 8;
+				    read[3] = crc & 0xff;
+				    while(!read_success){
+				      ReaderTransmitIClass(read, sizeof(read));
+				      if(ReaderReceiveIClass(resp) == 10) {
+					 read_success=true;
+				         Dbprintf("     %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
+					  j, resp[0], resp[1], resp[2],
+					  resp[3], resp[4], resp[5],
+					  resp[6], resp[7]);
+				      }
+				    }
+				}
+			}
+		}
+		WDT_HIT();
+	}
+	
+	LED_A_OFF();
+}
+
+//1. Create Method to Read sectors/blocks 0,1,2 and Send to client
+void IClass_iso14443A_GetPublic(uint8_t arg0) {
+	uint8_t act_all[]     = { 0x0a };
+	uint8_t identify[]    = { 0x0c };
+	uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	uint8_t readcheck_cc[]= { 0x88, 0x02 };	
+	//uint8_t read[]        = { 0x0c, 0x00, 0x00, 0x00 };	
+	uint8_t card_data[24]={0};
+	
+	//bool read_success=false;
+	uint8_t* resp = (((uint8_t *)BigBuf) + 3560);	// was 3560 - tied to other size changes
+
+	// Reset trace buffer
+    memset(trace, 0x44, RECV_CMD_OFFSET);
+	traceLen = 0;
 
+	// Setup SSC
+	FpgaSetupSsc();
+	// Start from off (no field generated)
+	// Signal field is off with the appropriate LED
+	LED_D_OFF();
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	SpinDelay(200);
+
+	SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+	// Now give it time to spin up.
+	// Signal field is on with the appropriate LED
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
+	SpinDelay(200);
+
+	LED_A_ON();
+
+	for(int i=0;i<1;i++) {
+	
+		if(traceLen > TRACE_SIZE) {
+			DbpString("Trace full");
+			break;
+		}
+		
+		if (BUTTON_PRESS()) break;
+
+		// Send act_all
+		ReaderTransmitIClass(act_all, 1);
+		// Card present?
+		if(ReaderReceiveIClass(resp)) {
+			ReaderTransmitIClass(identify, 1);
+			if(ReaderReceiveIClass(resp) == 10) {
+				// Select card          
+				memcpy(&select[1],resp,8);
+				ReaderTransmitIClass(select, sizeof(select));
+
+				if(ReaderReceiveIClass(resp) == 10) {
+					Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],
+					resp[3], resp[4], resp[5],
+					resp[6], resp[7]);
+				}
+				memcpy(card_data,resp,8);
+				// Card selected
+				Dbprintf("Readcheck on Sector 2");
+				ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
+				if(ReaderReceiveIClass(resp) == 8) {
+				   Dbprintf("     CC: %02x %02x %02x %02x %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],
+					resp[3], resp[4], resp[5],
+					resp[6], resp[7]);
+				}
+				memcpy(card_data+8,resp,8);
+				//prep to read config block
+				/*  read card configuration block
+				  while(!read_success){
+				  uint8_t sector_config=0x01;
+				  memcpy(read+1,&sector_config,1);
+				  ReaderTransmitIClass(read, sizeof(read));
+				  if(ReaderReceiveIClass(resp) == 8) {
+				    Dbprintf("     CC: %02x %02x %02x %02x %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],
+					resp[3], resp[4], resp[5],
+					resp[6], resp[7]);
+					read_success=true;
+                    memcpy(card_data+16,resp,8);
+				  }
+				}*/
+			}
+		}
+		WDT_HIT();
+	}
+	//Dbprintf("DEBUG: %02x%02x%02x%02x%02x%02x%02x%02x",card_data[0],card_data[1],card_data[2],card_data[3],card_data[4],card_data[5],card_data[6],card_data[7]);
+	//Dbprintf("DEBUG: %02x%02x%02x%02x%02x%02x%02x%02x",card_data[8],card_data[9],card_data[10],card_data[11],card_data[12],card_data[13],card_data[14],card_data[15]);
+	LED_A_OFF();
+	LED_B_ON();
+	//send data back to the client
+    cmd_send(CMD_ACK,0,0,0,card_data,16);
+	LED_B_OFF();
+}
+
+//2. Create Read method (cut-down from above) based off responses from 1. 
+//   Since we have the MAC could continue to use replay function.
+//3. Create Write method
+/*
+void IClass_iso14443A_write(uint8_t arg0, uint8_t blockNo, uint8_t *data, uint8_t *MAC) {
+	uint8_t act_all[]     = { 0x0a };
+	uint8_t identify[]    = { 0x0c };
+	uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	uint8_t readcheck_cc[]= { 0x88, 0x02 };
+	uint8_t check[]       = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	uint8_t read[]        = { 0x0c, 0x00, 0x00, 0x00 };
+	uint8_t write[]       = { 0x87, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	
+    uint16_t crc = 0;
+	
+	uint8_t* resp = (((uint8_t *)BigBuf) + 3560);	// was 3560 - tied to other size changes
+
+	// Reset trace buffer
+    memset(trace, 0x44, RECV_CMD_OFFSET);
+	traceLen = 0;
+
+	// Setup SSC
+	FpgaSetupSsc();
+	// Start from off (no field generated)
+	// Signal field is off with the appropriate LED
+	LED_D_OFF();
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	SpinDelay(200);
+
+	SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+	// Now give it time to spin up.
+	// Signal field is on with the appropriate LED
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
+	SpinDelay(200);
+
+	LED_A_ON();
+
+	for(int i=0;i<1;i++) {
+	
+		if(traceLen > TRACE_SIZE) {
+			DbpString("Trace full");
+			break;
+		}
+		
+		if (BUTTON_PRESS()) break;
+
+		// Send act_all
+		ReaderTransmitIClass(act_all, 1);
+		// Card present?
+		if(ReaderReceiveIClass(resp)) {
+			ReaderTransmitIClass(identify, 1);
+			if(ReaderReceiveIClass(resp) == 10) {
+				// Select card          
+				memcpy(&select[1],resp,8);
+				ReaderTransmitIClass(select, sizeof(select));
+
+				if(ReaderReceiveIClass(resp) == 10) {
+					Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],
+					resp[3], resp[4], resp[5],
+					resp[6], resp[7]);
+				}
+				// Card selected
+				Dbprintf("Readcheck on Sector 2");
+				ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
+				if(ReaderReceiveIClass(resp) == 8) {
+				   Dbprintf("     CC: %02x %02x %02x %02x %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],
+					resp[3], resp[4], resp[5],
+					resp[6], resp[7]);
+				}else return;
+				Dbprintf("Authenticate");
+				//for now replay captured auth (as cc not updated)
+				memcpy(check+5,MAC,4);
+				Dbprintf("     AA: %02x %02x %02x %02x",
+					check[5], check[6], check[7],check[8]);
+				ReaderTransmitIClass(check, sizeof(check));
+				if(ReaderReceiveIClass(resp) == 4) {
+				   Dbprintf("     AR: %02x %02x %02x %02x",
+					resp[0], resp[1], resp[2],resp[3]);
+				}else {
+				  Dbprintf("Error: Authentication Fail!");
+				  return;
+				}
+				Dbprintf("Write Block");
+				
+				//read configuration for max block number
+				read_success=false;
+				read[1]=1;
+				uint8_t *blockno=&read[1];
+				crc = iclass_crc16((char *)blockno,1);
+				read[2] = crc >> 8;
+				read[3] = crc & 0xff;
+				while(!read_success){
+				      ReaderTransmitIClass(read, sizeof(read));
+				      if(ReaderReceiveIClass(resp) == 10) {
+					 read_success=true;
+					 mem=resp[5];
+					 memory.k16= (mem & 0x80);
+					 memory.book= (mem & 0x20);
+					 memory.k2= (mem & 0x8);
+					 memory.lockauth= (mem & 0x2);
+					 memory.keyaccess= (mem & 0x1);
+
+				      }
+				}
+				if (memory.k16){
+				  cardsize=255;
+				}else cardsize=32;
+				//check card_size
+				
+				memcpy(write+1,blockNo,1);
+				memcpy(write+2,data,8);
+				memcpy(write+10,mac,4);
+				while(!send_success){
+				  ReaderTransmitIClass(write, sizeof(write));
+				  if(ReaderReceiveIClass(resp) == 10) {
+				    write_success=true;
+				}
+			}//
+		}
+		WDT_HIT();
+	}
+	
+	LED_A_OFF();
+}*/