X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/25d3e5cc83570a84605b819d5b1dd53abfa64ce8..be59094de9527e0e935d6d1cdd445d5b78946f44:/armsrc/iclass.c

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index 56bc29db..c587f8ea 100644
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -42,6 +42,7 @@
 #include "string.h"
 #include "common.h"
 #include "cmd.h"
+#include "iso14443a.h"
 // Needed for CRC in emulation mode;
 // same construction as in ISO 14443;
 // different initial value (CRC_ICLASS)
@@ -49,6 +50,7 @@
 #include "iso15693tools.h"
 #include "protocols.h"
 #include "optimized_cipher.h"
+#include "usb_cdc.h" // for usb_poll_validate_length
 
 static int timeout = 4096;
 
@@ -89,7 +91,7 @@ static RAMFUNC int OutOfNDecoding(int bit)
 
 	if(!Uart.bitBuffer) {
 		Uart.bitBuffer = bit ^ 0xFF0;
-		return FALSE;
+		return false;
 	}
 	else {
 		Uart.bitBuffer <<= 4;
@@ -100,7 +102,7 @@ static RAMFUNC int OutOfNDecoding(int bit)
 		Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF;
 		Uart.byteCnt++;
 		Uart.swapper = 0;
-		if(Uart.byteCnt > 15) { return TRUE; }
+		if(Uart.byteCnt > 15) { return true; }
 	}
 	else {
 		Uart.swapper = 1;
@@ -137,12 +139,12 @@ static RAMFUNC int OutOfNDecoding(int bit)
 					Uart.highCnt = 0;
 					if(Uart.byteCnt == 0) {
 						// Its not straightforward to show single EOFs
-						// So just leave it and do not return TRUE
+						// So just leave it and do not return true
 						Uart.output[0] = 0xf0;
 						Uart.byteCnt++;
 					}
 					else {
-						return TRUE;
+						return true;
 					}
 				}
 				else if(Uart.state != STATE_START_OF_COMMUNICATION) {
@@ -261,7 +263,7 @@ static RAMFUNC int OutOfNDecoding(int bit)
 				Uart.byteCnt++;
 				Uart.output[Uart.byteCnt] = 0xAA;
 				Uart.byteCnt++;
-				return TRUE;
+				return true;
 			}*/
 		}
 
@@ -316,7 +318,7 @@ static RAMFUNC int OutOfNDecoding(int bit)
 		}
 	}
 
-    return FALSE;
+    return false;
 }
 
 //=============================================================================
@@ -369,7 +371,7 @@ static RAMFUNC int ManchesterDecoding(int v)
 
 	if(Demod.buff < 3) {
 		Demod.buff++;
-		return FALSE;
+		return false;
 	}
 
 	if(Demod.state==DEMOD_UNSYNCD) {
@@ -471,7 +473,7 @@ static RAMFUNC int ManchesterDecoding(int v)
 					Demod.len++;
 					Demod.state = DEMOD_UNSYNCD;
 //					error = 0x0f;
-					return TRUE;
+					return true;
 				}
 				else {
 					Demod.state = DEMOD_ERROR_WAIT;
@@ -555,7 +557,7 @@ static RAMFUNC int ManchesterDecoding(int v)
 						}
 
 						Demod.state = DEMOD_UNSYNCD;
-						return TRUE;
+						return true;
 					}
 					else {
 						Demod.output[Demod.len] = 0xad;
@@ -610,14 +612,14 @@ static RAMFUNC int ManchesterDecoding(int v)
 				Demod.len++;
 				Demod.output[Demod.len] = 0xBB;
 				Demod.len++;
-				return TRUE;
+				return true;
 			}
 
 		}
 
 	} // end (state != UNSYNCED)
 
-    return FALSE;
+    return false;
 }
 
 //=============================================================================
@@ -637,7 +639,7 @@ void RAMFUNC SnoopIClass(void)
     // We won't start recording the frames that we acquire until we trigger;
     // a good trigger condition to get started is probably when we see a
     // response from the tag.
-    //int triggered = FALSE; // FALSE to wait first for card
+    //int triggered = false; // false to wait first for card
 
     // The command (reader -> tag) that we're receiving.
 	// The length of a received command will in most cases be no more than 18 bytes.
@@ -654,9 +656,9 @@ void RAMFUNC SnoopIClass(void)
     // The DMA buffer, used to stream samples from the FPGA
     uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
  
-	set_tracing(TRUE);
+	set_tracing(true);
 	clear_trace();
-    iso14a_set_trigger(FALSE);
+    iso14a_set_trigger(false);
 
 	int lastRxCounter;
     uint8_t *upTo;
@@ -747,12 +749,12 @@ void RAMFUNC SnoopIClass(void)
 			time_stop = (GetCountSspClk()-time_0) << 4;
 		    LED_C_ON();
 
-			//if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break;
-			//if(!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, TRUE)) break;
+			//if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,true)) break;
+			//if(!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, true)) break;
 			if(tracing)	{
 				uint8_t parity[MAX_PARITY_SIZE];
 				GetParity(Uart.output, Uart.byteCnt, parity);
-				LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, TRUE);
+				LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, true);
 			}
 
 
@@ -780,7 +782,7 @@ void RAMFUNC SnoopIClass(void)
 			if(tracing)	{
 				uint8_t parity[MAX_PARITY_SIZE];
 				GetParity(Demod.output, Demod.len, parity);
-				LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, FALSE);
+				LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, false);
 			}
 
 		    // And ready to receive another response.
@@ -828,7 +830,7 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) {
 //-----------------------------------------------------------------------------
 // Wait for commands from reader
 // Stop when button is pressed
-// Or return TRUE when command is captured
+// Or return true when command is captured
 //-----------------------------------------------------------------------------
 static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
 {
@@ -846,7 +848,7 @@ static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
     for(;;) {
         WDT_HIT();
 
-        if(BUTTON_PRESS()) return FALSE;
+        if(BUTTON_PRESS()) return false;
 
         if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
             AT91C_BASE_SSC->SSC_THR = 0x00;
@@ -856,7 +858,7 @@ static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
 
 			if(OutOfNDecoding(b & 0x0f)) {
 				*len = Uart.byteCnt;
-				return TRUE;
+				return true;
 			}
         }
     }
@@ -991,7 +993,7 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
 	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
 	// Enable and clear the trace
-	set_tracing(TRUE);
+	set_tracing(true);
 	clear_trace();
 	//Use the emulator memory for SIM
 	uint8_t *emulator = BigBuf_get_EM_addr();
@@ -1125,7 +1127,6 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf)
 	int resp_cc_len;
 
 	uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
-	memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
 	int len;
 
 	// Prepare card messages
@@ -1324,11 +1325,11 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf)
 		if (tracing) {
 			uint8_t parity[MAX_PARITY_SIZE];
 			GetParity(receivedCmd, len, parity);
-			LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, (r2t_time-time_0) << 4, parity, TRUE);
+			LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, (r2t_time-time_0) << 4, parity, true);
 
 			if (trace_data != NULL) {
 				GetParity(trace_data, trace_data_size, parity);
-				LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE);
+				LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, false);
 			}
 			if(!tracing) {
 				DbpString("Trace full");
@@ -1336,7 +1337,6 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf)
 			}
 
 		}
-		memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
 	}
 
 	//Dbprintf("%x", cmdsRecvd);
@@ -1420,7 +1420,7 @@ static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int
 
 
   uint8_t sendbyte;
-  bool firstpart = TRUE;
+  bool firstpart = true;
   c = 0;
   for(;;) {
     if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
@@ -1449,7 +1449,7 @@ static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int
     }
     WDT_HIT();
   }
-  if (samples) *samples = (c + *wait) << 3;
+  if (samples && wait) *samples = (c + *wait) << 3;
 }
 
 
@@ -1475,7 +1475,7 @@ void CodeIClassCommand(const uint8_t * cmd, int len)
     for(j = 0; j < 4; j++) {
       for(k = 0; k < 4; k++) {
 			if(k == (b & 3)) {
-				ToSend[++ToSendMax] = 0x0f;
+				ToSend[++ToSendMax] = 0xf0;
 			}
 			else {
 				ToSend[++ToSendMax] = 0x00;
@@ -1512,14 +1512,14 @@ void ReaderTransmitIClass(uint8_t* frame, int len)
 	if (tracing) {
 		uint8_t par[MAX_PARITY_SIZE];
 		GetParity(frame, len, par);
-		LogTrace(frame, len, rsamples, rsamples, par, TRUE);
+		LogTrace(frame, len, rsamples, rsamples, par, true);
 	}
 }
 
 //-----------------------------------------------------------------------------
 // Wait a certain time for tag response
-//  If a response is captured return TRUE
-//  If it takes too long return FALSE
+//  If a response is captured return true
+//  If it takes too long return false
 //-----------------------------------------------------------------------------
 static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) //uint8_t *buffer
 {
@@ -1538,27 +1538,27 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples,
 	uint8_t b;
 	if (elapsed) *elapsed = 0;
 
-	bool skip = FALSE;
+	bool skip = false;
 
 	c = 0;
 	for(;;) {
 		WDT_HIT();
 
-	        if(BUTTON_PRESS()) return FALSE;
+	        if(BUTTON_PRESS()) return false;
 
 		if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
 			AT91C_BASE_SSC->SSC_THR = 0x00;  // To make use of exact timing of next command from reader!!
 			if (elapsed) (*elapsed)++;
 		}
 		if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
-			if(c < timeout) { c++; } else { return FALSE; }
+			if(c < timeout) { c++; } else { return false; }
 			b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
 			skip = !skip;
 			if(skip) continue;
 		
 			if(ManchesterDecoding(b & 0x0f)) {
 				*samples = c << 3;
-				return  TRUE;
+				return  true;
 			}
 		}
 	}
@@ -1567,14 +1567,14 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples,
 int ReaderReceiveIClass(uint8_t* receivedAnswer)
 {
   int samples = 0;
-  if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE;
+  if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return false;
   rsamples += samples;
   if (tracing) {
 	uint8_t parity[MAX_PARITY_SIZE];
 	GetParity(receivedAnswer, Demod.len, parity);
-	LogTrace(receivedAnswer,Demod.len,rsamples,rsamples,parity,FALSE);
+	LogTrace(receivedAnswer,Demod.len,rsamples,rsamples,parity,false);
   }
-  if(samples == 0) return FALSE;
+  if(samples == 0) return false;
   return Demod.len;
 }
 
@@ -1582,8 +1582,8 @@ void setupIclassReader()
 {
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
     // Reset trace buffer
-	set_tracing(TRUE);
-	clear_trace();
+	  set_tracing(true);
+	  clear_trace();
 
     // Setup SSC
     FpgaSetupSsc();
@@ -1603,16 +1603,16 @@ void setupIclassReader()
 
 }
 
-size_t sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries)
+bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries)
 {
 	while(retries-- > 0)
 	{
 		ReaderTransmitIClass(command, cmdsize);
 		if(expected_size == ReaderReceiveIClass(resp)){
-			return 0;
+			return true;
 		}
 	}
-	return 1;//Error
+	return false;//Error
 }
 
 /**
@@ -1622,14 +1622,17 @@ size_t sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t*
  *         1 = Got CSN
  *         2 = Got CSN and CC
  */
-uint8_t handshakeIclassTag(uint8_t *card_data)
+uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key)
 {
 	static uint8_t act_all[]     = { 0x0a };
-	static uint8_t identify[]    = { 0x0c };
+	//static uint8_t identify[]    = { 0x0c };
+	static uint8_t identify[]    = { 0x0c, 0x00, 0x73, 0x33 };
 	static uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-
-
-	static uint8_t readcheck_cc[]= { 0x88, 0x02,};
+	static uint8_t readcheck_cc[]= { 0x88, 0x02 };
+	if (use_credit_key)
+		readcheck_cc[0] = 0x18;
+	else
+		readcheck_cc[0] = 0x88;
 
 	uint8_t resp[ICLASS_BUFFER_SIZE];
 
@@ -1660,7 +1663,7 @@ uint8_t handshakeIclassTag(uint8_t *card_data)
 	//Flag that we got to at least stage 1, read CSN
 	read_status = 1;
 
-	// Card selected, now read e-purse (cc)
+	// Card selected, now read e-purse (cc) (only 8 bytes no CRC)
 	ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
 	if(ReaderReceiveIClass(resp) == 8) {
 		//Save CC (e-purse) in response data
@@ -1670,6 +1673,9 @@ uint8_t handshakeIclassTag(uint8_t *card_data)
 
 	return read_status;
 }
+uint8_t handshakeIclassTag(uint8_t *card_data) {
+	return handshakeIclassTag_ext(card_data, false);
+}
 
 
 // Reader iClass Anticollission
@@ -1677,31 +1683,45 @@ void ReaderIClass(uint8_t arg0) {
 
 	uint8_t card_data[6 * 8]={0};
 	memset(card_data, 0xFF, sizeof(card_data));
-    uint8_t last_csn[8]={0};
-	
+	uint8_t last_csn[8]={0,0,0,0,0,0,0,0};
+	uint8_t resp[ICLASS_BUFFER_SIZE];
+	memset(resp, 0xFF, sizeof(resp));
 	//Read conf block CRC(0x01) => 0xfa 0x22
 	uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x01, 0xfa, 0x22};
-	//Read conf block CRC(0x05) => 0xde  0x64
+	//Read App Issuer Area block CRC(0x05) => 0xde  0x64
 	uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x05, 0xde, 0x64};
 
-
-    int read_status= 0;
+	int read_status= 0;
 	uint8_t result_status = 0;
-    bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
-
-	set_tracing(TRUE);
-    setupIclassReader();
-
-	while(!BUTTON_PRESS())
-    {
-
+	// flag to read until one tag is found successfully
+	bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
+	// flag to only try 5 times to find one tag then return
+	bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY;
+	// if neither abort_after_read nor try_once then continue reading until button pressed.
+
+	bool use_credit_key = arg0 & FLAG_ICLASS_READER_CEDITKEY;
+	// test flags for what blocks to be sure to read
+	uint8_t flagReadConfig = arg0 & FLAG_ICLASS_READER_CONF;
+	uint8_t flagReadCC = arg0 & FLAG_ICLASS_READER_CC;
+	uint8_t flagReadAA = arg0 & FLAG_ICLASS_READER_AA;
+
+	set_tracing(true);
+	setupIclassReader();
+
+	uint16_t tryCnt=0;
+	bool userCancelled = BUTTON_PRESS() || usb_poll_validate_length();
+	while(!userCancelled)
+	{
+		// if only looking for one card try 2 times if we missed it the first time
+		if (try_once && tryCnt > 2) break; 
+		tryCnt++;
 		if(!tracing) {
 			DbpString("Trace full");
 			break;
 		}
 		WDT_HIT();
 
-		read_status = handshakeIclassTag(card_data);
+		read_status = handshakeIclassTag_ext(card_data, use_credit_key);
 
 		if(read_status == 0) continue;
 		if(read_status == 1) result_status = FLAG_ICLASS_READER_CSN;
@@ -1712,25 +1732,24 @@ void ReaderIClass(uint8_t arg0) {
 		// moving CC forward 8 bytes
 		memcpy(card_data+16,card_data+8, 8);
 		//Read block 1, config
-		if(arg0 & FLAG_ICLASS_READER_CONF)
-		{
-			if(sendCmdGetResponseWithRetries(readConf, sizeof(readConf),card_data+8, 10, 10))
-			{
-				Dbprintf("Failed to dump config block");
-			}else
+		if(flagReadConfig) {
+			if(sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, 10, 10))
 			{
 				result_status |= FLAG_ICLASS_READER_CONF;
+				memcpy(card_data+8, resp, 8);
+			} else {
+				Dbprintf("Failed to dump config block");
 			}
 		}
 
 		//Read block 5, AA
-		if(arg0 & FLAG_ICLASS_READER_AA){
-			if(sendCmdGetResponseWithRetries(readAA, sizeof(readAA),card_data+(8*4), 10, 10))
-			{
-//				Dbprintf("Failed to dump AA block");
-			}else
+		if(flagReadAA) {
+			if(sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, 10, 10))
 			{
 				result_status |= FLAG_ICLASS_READER_AA;
+				memcpy(card_data+(8*5), resp, 8);
+			} else {
+				//Dbprintf("Failed to dump AA block");
 			}
 		}
 
@@ -1740,19 +1759,20 @@ void ReaderIClass(uint8_t arg0) {
 		// (3,4 write-only, kc and kd)
 		// 5 Application issuer area
 		//
-		//Then we can 'ship' back the 8 * 5 bytes of data,
+		//Then we can 'ship' back the 8 * 6 bytes of data,
 		// with 0xFF:s in block 3 and 4.
 
 		LED_B_ON();
-		//Send back to client, but don't bother if we already sent this
+		//Send back to client, but don't bother if we already sent this - 
+		//  only useful if looping in arm (not try_once && not abort_after_read)
 		if(memcmp(last_csn, card_data, 8) != 0)
 		{
-			// If caller requires that we get CC, continue until we got it
-			if( (arg0 & read_status & FLAG_ICLASS_READER_CC) || !(arg0 & FLAG_ICLASS_READER_CC))
-			{
+			// If caller requires that we get Conf, CC, AA, continue until we got it
+			if( (result_status ^ FLAG_ICLASS_READER_CSN ^ flagReadConfig ^ flagReadCC ^ flagReadAA) == 0) {
 				cmd_send(CMD_ACK,result_status,0,0,card_data,sizeof(card_data));
 				if(abort_after_read) {
 					LED_A_OFF();
+					LED_B_OFF();
 					return;
 				}
 				//Save that we already sent this....
@@ -1761,9 +1781,14 @@ void ReaderIClass(uint8_t arg0) {
 
 		}
 		LED_B_OFF();
-    }
-    cmd_send(CMD_ACK,0,0,0,card_data, 0);
-    LED_A_OFF();
+		userCancelled = BUTTON_PRESS() || usb_poll_validate_length();
+	}
+	if (userCancelled) {
+		cmd_send(CMD_ACK,0xFF,0,0,card_data, 0);
+	} else {
+		cmd_send(CMD_ACK,0,0,0,card_data, 0);
+	}
+	LED_A_OFF();
 }
 
 void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
@@ -1797,7 +1822,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
 	uint8_t resp[ICLASS_BUFFER_SIZE];
 	
     setupIclassReader();
-	set_tracing(TRUE);
+	set_tracing(true);
 
 	while(!BUTTON_PRESS()) {
 	
@@ -1814,7 +1839,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
 		//for now replay captured auth (as cc not updated)
 		memcpy(check+5,MAC,4);
 
-		if(sendCmdGetResponseWithRetries(check, sizeof(check),resp, 4, 5))
+		if(!sendCmdGetResponseWithRetries(check, sizeof(check),resp, 4, 5))
 		{
 			Dbprintf("Error: Authentication Fail!");
 			continue;
@@ -1826,7 +1851,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
 		read[2] = crc >> 8;
 		read[3] = crc & 0xff;
 
-		if(sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10))
+		if(!sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10))
 		{
 			Dbprintf("Dump config (block 1) failed");
 			continue;
@@ -1853,7 +1878,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
 			read[2] = crc >> 8;
 			read[3] = crc & 0xff;
 
-			if(!sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10))
+			if(sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10))
 			{
 				Dbprintf("     %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
 						 block, resp[0], resp[1], resp[2],
@@ -1904,130 +1929,137 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
 	LED_A_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);
-
-	// Reset trace buffer
-    memset(trace, 0x44, RECV_CMD_OFFSET);
-	traceLen = 0;
+void iClass_ReadCheck(uint8_t	blockNo, uint8_t keyType) {
+	uint8_t readcheck[] = { keyType, blockNo };
+	uint8_t resp[] = {0,0,0,0,0,0,0,0};
+	size_t isOK = 0;
+	isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 6);
+	cmd_send(CMD_ACK,isOK,0,0,0,0);
+}
 
-	// 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);
+void iClass_Authentication(uint8_t *MAC) {
+	uint8_t check[] = { ICLASS_CMD_CHECK, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	uint8_t resp[ICLASS_BUFFER_SIZE];
+	memcpy(check+5,MAC,4);
+	bool isOK;
+	isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 6);
+	cmd_send(CMD_ACK,isOK,0,0,0,0);
+}
+bool iClass_ReadBlock(uint8_t blockNo, uint8_t *readdata) {
+	uint8_t readcmd[] = {ICLASS_CMD_READ_OR_IDENTIFY, blockNo, 0x00, 0x00}; //0x88, 0x00 // can i use 0C?
+	char bl = blockNo;
+	uint16_t rdCrc = iclass_crc16(&bl, 1);
+	readcmd[2] = rdCrc >> 8;
+	readcmd[3] = rdCrc & 0xff;
+	uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0};
+	bool isOK = false;
+
+	//readcmd[1] = blockNo;
+	isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, 10, 10);
+	memcpy(readdata, resp, sizeof(resp));
+
+	return isOK;
+}
 
-	SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+void iClass_ReadBlk(uint8_t blockno) {
+	uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0};
+	bool isOK = false;
+	isOK = iClass_ReadBlock(blockno, readblockdata);
+	cmd_send(CMD_ACK, isOK, 0, 0, readblockdata, 8);
+}
 
-	// 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);
+void iClass_Dump(uint8_t blockno, uint8_t numblks) {
+	uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0};
+	bool isOK = false;
+	uint8_t blkCnt = 0;
 
-	LED_A_ON();
+	BigBuf_free();
+	uint8_t *dataout = BigBuf_malloc(255*8);
+	if (dataout == NULL){
+		Dbprintf("out of memory");
+		OnError(1);
+		return;
+	}
+	memset(dataout,0xFF,255*8);
+
+	for (;blkCnt < numblks; blkCnt++) {
+		isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata);
+		if (!isOK || (readblockdata[0] == 0xBB || readblockdata[7] == 0xBB || readblockdata[2] == 0xBB)) { //try again
+			isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata);
+			if (!isOK) {
+				Dbprintf("Block %02X failed to read", blkCnt+blockno);
+				break;
+			}
+		}
+		memcpy(dataout+(blkCnt*8),readblockdata,8);
+	}
+	//return pointer to dump memory in arg3
+	cmd_send(CMD_ACK,isOK,blkCnt,BigBuf_max_traceLen(),0,0);
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	LEDsoff();
+	BigBuf_free();
+}
 
-	for(int i=0;i<1;i++) {
-	
-		if(traceLen > TRACE_SIZE) {
-			DbpString("Trace full");
-			break;
+bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) {
+	uint8_t write[] = { ICLASS_CMD_UPDATE, blockNo, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	//uint8_t readblockdata[10];
+	//write[1] = blockNo;
+	memcpy(write+2, data, 12); // data + mac
+	char *wrCmd = (char *)(write+1); 
+	uint16_t wrCrc = iclass_crc16(wrCmd, 13);
+	write[14] = wrCrc >> 8;
+	write[15] = wrCrc & 0xff;
+	uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0};
+	bool isOK = false;
+
+	isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10);
+	if (isOK) { //if reader responded correctly
+		//Dbprintf("WriteResp: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",resp[0],resp[1],resp[2],resp[3],resp[4],resp[5],resp[6],resp[7],resp[8],resp[9]);
+		if (memcmp(write+2,resp,8)) {  //if response is not equal to write values
+			if (blockNo != 3 && blockNo != 4) { //if not programming key areas (note key blocks don't get programmed with actual key data it is xor data)
+				//error try again
+				isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10);
+			} 
+			
 		}
-		
-		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;
-				}
-			}//
+	}
+	return isOK;
+}
+
+void iClass_WriteBlock(uint8_t blockNo, uint8_t *data) {
+	bool isOK = iClass_WriteBlock_ext(blockNo, data);
+	if (isOK){
+		Dbprintf("Write block [%02x] successful",blockNo);
+	} else {
+		Dbprintf("Write block [%02x] failed",blockNo);		
+	}
+	cmd_send(CMD_ACK,isOK,0,0,0,0);	
+}
+
+void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) {
+	int i;
+	int written = 0;
+	int total_block = (endblock - startblock) + 1;
+	for (i = 0; i < total_block;i++){
+		// block number
+		if (iClass_WriteBlock_ext(i+startblock, data+(i*12))){
+			Dbprintf("Write block [%02x] successful",i + startblock);
+			written++;
+		} else {
+			if (iClass_WriteBlock_ext(i+startblock, data+(i*12))){
+				Dbprintf("Write block [%02x] successful",i + startblock);
+				written++;
+			} else {
+				Dbprintf("Write block [%02x] failed",i + startblock);
+			}
 		}
-		WDT_HIT();
 	}
-	
-	LED_A_OFF();
-}*/
+	if (written == total_block)
+		Dbprintf("Clone complete");
+	else
+		Dbprintf("Clone incomplete");   
+
+	cmd_send(CMD_ACK,1,0,0,0,0);
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	LEDsoff();
+}