X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/17c60b1248713836ecf4e7e9ce2639a05a7e1d35..9827020ac56300222a2bdabfc1858b8347345ca4:/armsrc/iclass.c?ds=inline

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index 41c9b8b5..dcb672e7 100644
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -47,6 +47,8 @@
 // different initial value (CRC_ICLASS)
 #include "iso14443crc.h"
 #include "iso15693tools.h"
+#include "protocols.h"
+#include "optimized_cipher.h"
 
 static int timeout = 4096;
 
@@ -351,7 +353,7 @@ static struct {
 		SUB_SECOND_HALF,
 		SUB_BOTH
 	}		sub;
-    uint8_t *output;
+    uint8_t   *output;
 } Demod;
 
 static RAMFUNC int ManchesterDecoding(int v)
@@ -424,10 +426,11 @@ static RAMFUNC int ManchesterDecoding(int v)
 					Demod.state = DEMOD_UNSYNCD;
 					error = 0x88;
 				}
-
+				
+				// TODO: use this error value to print?  Ask Holiman.
+				// 2016-01-08 iceman
 			}
 			error = 0;
-
 		}
 	}
 	else {
@@ -630,8 +633,6 @@ static RAMFUNC int ManchesterDecoding(int v)
 //-----------------------------------------------------------------------------
 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.
@@ -652,11 +653,12 @@ 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);
 	clear_trace();
+	set_tracing(TRUE);
+	
     iso14a_set_trigger(FALSE);
 
-	int lastRxCounter;
+    int lastRxCounter;
     uint8_t *upTo;
     int smpl;
     int maxBehindBy = 0;
@@ -702,22 +704,22 @@ void RAMFUNC SnoopIClass(void)
     for(;;) {
         LED_A_ON();
         WDT_HIT();
-        int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &
-                                (DMA_BUFFER_SIZE-1);
-        if(behindBy > maxBehindBy) {
+        int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (DMA_BUFFER_SIZE-1);
+
+        if ( behindBy > maxBehindBy) {
             maxBehindBy = behindBy;
-            if(behindBy > (9 * DMA_BUFFER_SIZE / 10)) {
+            if ( behindBy > (9 * DMA_BUFFER_SIZE / 10)) {
                 Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
                 goto done;
             }
         }
-        if(behindBy < 1) continue;
+        if( behindBy < 1) continue;
 
-	LED_A_OFF();
+		LED_A_OFF();
         smpl = upTo[0];
         upTo++;
         lastRxCounter -= 1;
-        if(upTo - dmaBuf > DMA_BUFFER_SIZE) {
+        if (upTo - dmaBuf > DMA_BUFFER_SIZE) {
             upTo -= DMA_BUFFER_SIZE;
             lastRxCounter += DMA_BUFFER_SIZE;
             AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo;
@@ -725,77 +727,75 @@ void RAMFUNC SnoopIClass(void)
         }
 
         //samples += 4;
-	samples += 1;
+		samples += 1;
 
-	if(smpl & 0xF) {
-		decbyte ^= (1 << (3 - div));
-	}
+		if(smpl & 0xF)
+			decbyte ^= (1 << (3 - div));
+	
 	
-	// FOR READER SIDE COMMUMICATION...
+		// FOR READER SIDE COMMUMICATION...
 
-	decbyter <<= 2;
-	decbyter ^= (smpl & 0x30);
+		decbyter <<= 2;
+		decbyter ^= (smpl & 0x30);
 
-	div++;
+		++div;
 	
-	if((div + 1) % 2 == 0) {
-		smpl = decbyter;	
-		if(OutOfNDecoding((smpl & 0xF0) >> 4)) {
-		    rsamples = samples - Uart.samples;
-			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(tracing)	{
-				uint8_t parity[MAX_PARITY_SIZE];
-				GetParity(Uart.output, Uart.byteCnt, parity);
-				LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, TRUE);
-			}
-
+		if (( div + 1) % 2 == 0) {
+			smpl = decbyter;	
+			if ( OutOfNDecoding((smpl & 0xF0) >> 4)) {
+				rsamples = samples - Uart.samples;
+				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(tracing)	{
+					uint8_t parity[MAX_PARITY_SIZE];
+					GetParity(Uart.output, Uart.byteCnt, parity);
+					LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, TRUE);
+				}
 
-			/* And ready to receive another command. */
-		    Uart.state = STATE_UNSYNCD;
-		    /* And also reset the demod code, which might have been */
-		    /* false-triggered by the commands from the reader. */
-		    Demod.state = DEMOD_UNSYNCD;
-		    LED_B_OFF();
-		    Uart.byteCnt = 0;
-		}else{
-			time_start = (GetCountSspClk()-time_0) << 4;
+				/* And ready to receive another command. */
+				Uart.state = STATE_UNSYNCD;
+				/* And also reset the demod code, which might have been */
+				/* false-triggered by the commands from the reader. */
+				Demod.state = DEMOD_UNSYNCD;
+				LED_B_OFF();
+				Uart.byteCnt = 0;
+			} else {
+				time_start = (GetCountSspClk()-time_0) << 4;
+			}
+			decbyter = 0;
 		}
-		decbyter = 0;
-	}
 
-	if(div > 3) {
-		smpl = decbyte;
-		if(ManchesterDecoding(smpl & 0x0F)) {
-			time_stop = (GetCountSspClk()-time_0) << 4;
+		if(div > 3) {
+			smpl = decbyte;
+			if(ManchesterDecoding(smpl & 0x0F)) {
+				time_stop = (GetCountSspClk()-time_0) << 4;
 
-			rsamples = samples - Demod.samples;
-		    LED_B_ON();
+				rsamples = samples - Demod.samples;
+				LED_B_ON();
 
-			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);
-			}
+				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);
+				}
 
-		    // And ready to receive another response.
-		    memset(&Demod, 0, sizeof(Demod));
-			Demod.output = tagToReaderResponse;
-		    Demod.state = DEMOD_UNSYNCD;
-		    LED_C_OFF();
-		}else{
-			time_start = (GetCountSspClk()-time_0) << 4;
+				// And ready to receive another response.
+				memset(&Demod, 0, sizeof(Demod));
+				Demod.output = tagToReaderResponse;
+				Demod.state = DEMOD_UNSYNCD;
+				LED_C_OFF();
+			} else {
+				time_start = (GetCountSspClk()-time_0) << 4;
+			}
+			
+			div = 0;
+			decbyte = 0x00;
 		}
-		
-		div = 0;
-		decbyte = 0x00;
-	}
-	//}
 
-        if(BUTTON_PRESS()) {
+        if (BUTTON_PRESS()) {
             DbpString("cancelled_a");
             goto done;
         }
@@ -810,17 +810,14 @@ done:
     AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
     Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
 	Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);
-    LED_A_OFF();
-    LED_B_OFF();
-    LED_C_OFF();
-    LED_D_OFF();
+	LEDsoff();
+	set_tracing(FALSE);	
 }
 
 void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) {
 	int i; 
-	for(i = 0; i < 8; i++) {
+	for(i = 0; i < 8; i++)
 		rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5);
-	}
 }
 
 //-----------------------------------------------------------------------------
@@ -942,7 +939,7 @@ static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
 		uint8_t b = cmd[i];
 		ToSend[++ToSendMax] = encode4Bits(b & 0xF); //Least significant half
 		ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF);//Most significant half
-	}
+			}
 
 	// Send EOF
 	ToSend[++ToSendMax] = 0xB8;
@@ -965,8 +962,11 @@ static void CodeIClassTagSOF()
 	// Convert from last byte pos to length
 	ToSendMax++;
 }
+#define MODE_SIM_CSN        0
+#define MODE_EXIT_AFTER_MAC 1
+#define MODE_FULLSIM        2
 
-int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
+int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf);
 /**
  * @brief SimulateIClass simulates an iClass card.
  * @param arg0 type of simulation
@@ -986,17 +986,23 @@ 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);
 	clear_trace();
+	set_tracing(TRUE);
+
+	//Use the emulator memory for SIM
+	uint8_t *emulator = BigBuf_get_EM_addr();
 
-	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,NULL);
+		memcpy(emulator, datain, 8);
+		doIClassSimulation(MODE_SIM_CSN,NULL);
 	}else if(simType == 1)
 	{
-		doIClassSimulation(csn_crc,0,NULL);
+		//Default CSN
+		uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
+		// Use the CSN from commandline
+		memcpy(emulator, csn_crc, 8);
+		doIClassSimulation(MODE_SIM_CSN,NULL);
 	}
 	else if(simType == 2)
 	{
@@ -1011,8 +1017,8 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
 		{
 			// 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,mac_responses+i*8))
+			memcpy(emulator, datain+(i*8), 8);
+			if(doIClassSimulation(MODE_EXIT_AFTER_MAC,mac_responses+i*8))
 			{
 				cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
 				return; // Button pressed
@@ -1020,6 +1026,9 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
 		}
 		cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
 
+	}else if(simType == 3){
+		//This is 'full sim' mode, where we use the emulator storage for data.
+		doIClassSimulation(MODE_FULLSIM, NULL);
 	}
 	else{
 		// We may want a mode here where we hardcode the csns to use (from proxclone).
@@ -1027,31 +1036,56 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
 		Dbprintf("The mode is not implemented, reserved for future use");
 	}
 	Dbprintf("Done...");
-
+	set_tracing(FALSE);	
+}
+void AppendCrc(uint8_t* data, int len)
+{
+	ComputeCrc14443(CRC_ICLASS,data,len,data+len,data+len+1);
 }
+
 /**
  * @brief Does the actual simulation
  * @param csn - csn to use
  * @param breakAfterMacReceived if true, returns after reader MAC has been received.
  */
-int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
+int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf)
 {
+	// free eventually allocated BigBuf memory
+	BigBuf_free_keep_EM();
 
+	State cipher_state;
+//	State cipher_state_reserve;
+	uint8_t *csn = BigBuf_get_EM_addr();
+	uint8_t *emulator = csn;
+	uint8_t sof_data[] = { 0x0F} ;
 	// CSN followed by two CRC bytes
-	uint8_t response1[] = { 0x0F} ;
-	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};
-	memcpy(response3,csn,sizeof(response3));
+	uint8_t anticoll_data[10] = { 0 };
+	uint8_t csn_data[10] = { 0 };
+	memcpy(csn_data,csn,sizeof(csn_data));
 	Dbprintf("Simulating 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]);
-	// e-Purse
-	uint8_t response4[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
 	// Construct anticollision-CSN
-	rotateCSN(response3,response2);
+	rotateCSN(csn_data,anticoll_data);
 
 	// Compute CRC on both CSNs
-	ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]);
-	ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]);
+	ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]);
+	ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]);
+
+	uint8_t diversified_key[8] = { 0 };
+	// e-Purse
+	uint8_t card_challenge_data[8] = { 0x00 };
+	if(simulationMode == MODE_FULLSIM)
+	{
+		//The diversified key should be stored on block 3
+		//Get the diversified key from emulator memory
+		memcpy(diversified_key, emulator+(8*3),8);
+
+		//Card challenge, a.k.a e-purse is on block 2
+		memcpy(card_challenge_data,emulator + (8 * 2) , 8);
+		//Precalculate the cipher state, feeding it the CC
+		cipher_state = opt_doTagMAC_1(card_challenge_data,diversified_key);
+
+	}
 
 	int exitLoop = 0;
 	// Reader 0a
@@ -1062,34 +1096,31 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 	// Tag    CSN
 
 	uint8_t *modulated_response;
-	int modulated_response_size;
+	int modulated_response_size = 0;
 	uint8_t* trace_data = NULL;
 	int trace_data_size = 0;
-	//uint8_t sof = 0x0f;
 
-	// free eventually allocated BigBuf memory
-	BigBuf_free();
+
 	// Respond SOF -- takes 1 bytes
-	uint8_t *resp1 = BigBuf_malloc(2);
-	int resp1Len;
+	uint8_t *resp_sof = BigBuf_malloc(2);
+	int resp_sof_Len;
 
 	// Anticollision CSN (rotated CSN)
 	// 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
-	uint8_t *resp2 = BigBuf_malloc(28);
-	int resp2Len;
+	uint8_t *resp_anticoll = BigBuf_malloc(28);
+	int resp_anticoll_len;
 
 	// CSN
 	// 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
-	uint8_t *resp3 = BigBuf_malloc(30);
-	int resp3Len;
+	uint8_t *resp_csn = BigBuf_malloc(30);
+	int resp_csn_len;
 
 	// e-Purse
 	// 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
-	uint8_t *resp4 = BigBuf_malloc(20);
-	int resp4Len;
+	uint8_t *resp_cc = BigBuf_malloc(20);
+	int resp_cc_len;
 
 	uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
-	memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
 	int len;
 
 	// Prepare card messages
@@ -1097,20 +1128,26 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 
 	// First card answer: SOF
 	CodeIClassTagSOF();
-	memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
+	memcpy(resp_sof, ToSend, ToSendMax); resp_sof_Len = ToSendMax;
 
 	// Anticollision CSN
-	CodeIClassTagAnswer(response2, sizeof(response2));
-	memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax;
+	CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data));
+	memcpy(resp_anticoll, ToSend, ToSendMax); resp_anticoll_len = ToSendMax;
 
 	// CSN
-	CodeIClassTagAnswer(response3, sizeof(response3));
-	memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax;
+	CodeIClassTagAnswer(csn_data, sizeof(csn_data));
+	memcpy(resp_csn, ToSend, ToSendMax); resp_csn_len = ToSendMax;
 
 	// e-Purse
-	CodeIClassTagAnswer(response4, sizeof(response4));
-	memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax;
+	CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data));
+	memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax;
 
+	//This is used for responding to READ-block commands or other data which is dynamically generated
+	//First the 'trace'-data, not encoded for FPGA
+	uint8_t *data_generic_trace = BigBuf_malloc(8 + 2);//8 bytes data + 2byte CRC is max tag answer
+	//Then storage for the modulated data
+	//Each bit is doubled when modulated for FPGA, and we also have SOF and EOF (2 bytes)
+	uint8_t *data_response = BigBuf_malloc( (8+2) * 2 + 2);
 
 	// Start from off (no field generated)
 	//FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
@@ -1130,9 +1167,9 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 
 	LED_A_ON();
 	bool buttonPressed = false;
-
+	uint8_t response_delay = 1;
 	while(!exitLoop) {
-
+		response_delay = 1;
 		LED_B_OFF();
 		//Signal tracer
 		// Can be used to get a trigger for an oscilloscope..
@@ -1147,38 +1184,52 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 		LED_C_ON();
 
 		// Okay, look at the command now.
-		if(receivedCmd[0] == 0x0a ) {
+		if(receivedCmd[0] == ICLASS_CMD_ACTALL ) {
 			// Reader in anticollission phase
-			modulated_response = resp1; modulated_response_size = resp1Len; //order = 1;
-			trace_data = response1;
-			trace_data_size = sizeof(response1);
-		} else if(receivedCmd[0] == 0x0c) {
+			modulated_response = resp_sof; modulated_response_size = resp_sof_Len; //order = 1;
+			trace_data = sof_data;
+			trace_data_size = sizeof(sof_data);
+		} else if(receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) {
 			// Reader asks for anticollission CSN
-			modulated_response = resp2; modulated_response_size = resp2Len; //order = 2;
-			trace_data = response2;
-			trace_data_size = sizeof(response2);
+			modulated_response = resp_anticoll; modulated_response_size = resp_anticoll_len; //order = 2;
+			trace_data = anticoll_data;
+			trace_data_size = sizeof(anticoll_data);
 			//DbpString("Reader requests anticollission CSN:");
-		} else if(receivedCmd[0] == 0x81) {
+		} else if(receivedCmd[0] == ICLASS_CMD_SELECT) {
 			// Reader selects anticollission CSN.
 			// Tag sends the corresponding real CSN
-			modulated_response = resp3; modulated_response_size = resp3Len; //order = 3;
-			trace_data = response3;
-			trace_data_size = sizeof(response3);
+			modulated_response = resp_csn; modulated_response_size = resp_csn_len; //order = 3;
+			trace_data = csn_data;
+			trace_data_size = sizeof(csn_data);
 			//DbpString("Reader selects anticollission CSN:");
-		} else if(receivedCmd[0] == 0x88) {
+		} else if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD) {
 			// Read e-purse (88 02)
-			modulated_response = resp4; modulated_response_size = resp4Len; //order = 4;
-			trace_data = response4;
-			trace_data_size = sizeof(response4);
+			modulated_response = resp_cc; modulated_response_size = resp_cc_len; //order = 4;
+			trace_data = card_challenge_data;
+			trace_data_size = sizeof(card_challenge_data);
 			LED_B_ON();
-		} else if(receivedCmd[0] == 0x05) {
+		} else if(receivedCmd[0] == ICLASS_CMD_CHECK) {
 			// Reader random and reader MAC!!!
-			// Do not respond
+			if(simulationMode == MODE_FULLSIM)
+			{
+				//NR, from reader, is in receivedCmd +1
+				opt_doTagMAC_2(cipher_state,receivedCmd+1,data_generic_trace,diversified_key);
+
+				trace_data = data_generic_trace;
+				trace_data_size = 4;
+				CodeIClassTagAnswer(trace_data , trace_data_size);
+				memcpy(data_response, ToSend, ToSendMax);
+				modulated_response = data_response;
+				modulated_response_size = ToSendMax;
+				response_delay = 0;//We need to hurry here...
+				//exitLoop = true;
+			}else
+			{	//Not fullsim, we don't respond
             // We do not know what to answer, so lets keep quiet
-			modulated_response = resp1; modulated_response_size = 0; //order = 5;
+				modulated_response = resp_sof; modulated_response_size = 0;
 			trace_data = NULL;
 			trace_data_size = 0;
-			if (breakAfterMacReceived){
+				if (simulationMode == MODE_EXIT_AFTER_MAC){
 				// dbprintf:ing ...
 				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]);
@@ -1192,12 +1243,51 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 				}
 				exitLoop = true;
 			}
-		} else if(receivedCmd[0] == 0x00 && len == 1) {
+			}
+
+		} else if(receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
 			// Reader ends the session
-			modulated_response = resp1; modulated_response_size = 0; //order = 0;
+			modulated_response = resp_sof; modulated_response_size = 0; //order = 0;
 			trace_data = NULL;
 			trace_data_size = 0;
-		} else {
+		} else if(simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4){
+			//Read block
+			uint16_t blk = receivedCmd[1];
+			//Take the data...
+			memcpy(data_generic_trace, emulator+(blk << 3),8);
+			//Add crc
+			AppendCrc(data_generic_trace, 8);
+			trace_data = data_generic_trace;
+			trace_data_size = 10;
+			CodeIClassTagAnswer(trace_data , trace_data_size);
+			memcpy(data_response, ToSend, ToSendMax);
+			modulated_response = data_response;
+			modulated_response_size = ToSendMax;
+		}else if(receivedCmd[0] == ICLASS_CMD_UPDATE && simulationMode == MODE_FULLSIM)
+		{//Probably the reader wants to update the nonce. Let's just ignore that for now.
+			// OBS! If this is implemented, don't forget to regenerate the cipher_state
+			//We're expected to respond with the data+crc, exactly what's already in the receivedcmd
+			//receivedcmd is now UPDATE 1b | ADDRESS 1b| DATA 8b| Signature 4b or CRC 2b|
+
+			//Take the data...
+			memcpy(data_generic_trace, receivedCmd+2,8);
+			//Add crc
+			AppendCrc(data_generic_trace, 8);
+			trace_data = data_generic_trace;
+			trace_data_size = 10;
+			CodeIClassTagAnswer(trace_data , trace_data_size);
+			memcpy(data_response, ToSend, ToSendMax);
+			modulated_response = data_response;
+			modulated_response_size = ToSendMax;
+		}
+		else if(receivedCmd[0] == ICLASS_CMD_PAGESEL)
+		{//Pagesel
+			//Pagesel enables to select a page in the selected chip memory and return its configuration block
+			//Chips with a single page will not answer to this command
+			// It appears we're fine ignoring this.
+			//Otherwise, we should answer 8bytes (block) + 2bytes CRC
+		}
+		else {
 			//#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44
 			// Never seen this command before
 			Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
@@ -1206,7 +1296,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 			receivedCmd[3], receivedCmd[4], receivedCmd[5],
 			receivedCmd[6], receivedCmd[7], receivedCmd[8]);
 			// Do not respond
-			modulated_response = resp1; modulated_response_size = 0; //order = 0;
+			modulated_response = resp_sof; modulated_response_size = 0; //order = 0;
 			trace_data = NULL;
 			trace_data_size = 0;
 		}
@@ -1222,7 +1312,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 		A legit tag has about 380us delay between reader EOT and tag SOF.
 		**/
 		if(modulated_response_size > 0) {
-			SendIClassAnswer(modulated_response, modulated_response_size, 1);
+			SendIClassAnswer(modulated_response, modulated_response_size, response_delay);
 			t2r_time = GetCountSspClk();
 		}
 
@@ -1235,24 +1325,17 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 				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);
 			}
-			if(!tracing) {
+			if(!tracing)
 				DbpString("Trace full");
-				//break;
-			}
 
 		}
-		memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
 	}
 
-	//Dbprintf("%x", cmdsRecvd);
-	LED_A_OFF();
-	LED_B_OFF();
-	LED_C_OFF();
-
+	LEDsoff();
+	
 	if(buttonPressed)
-	{
 		DbpString("Button pressed");
-	}
+	
 	return buttonPressed;
 }
 
@@ -1300,33 +1383,31 @@ static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
 //-----------------------------------------------------------------------------
 static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait)
 {
-  int c;
-  FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
-  AT91C_BASE_SSC->SSC_THR = 0x00;
-  FpgaSetupSsc();
-
-   if (wait)
-   {
-     if(*wait < 10) *wait = 10;
-     
-     for(c = 0; c < *wait;) {
-       if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
-         AT91C_BASE_SSC->SSC_THR = 0x00;		// For exact timing!
-         c++;
-       }
-       if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
-         volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
-         (void)r;
-       }
-       WDT_HIT();
-     }
-
-   }
-
-
-  uint8_t sendbyte;
-  bool firstpart = TRUE;
-  c = 0;
+	int c;
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
+	AT91C_BASE_SSC->SSC_THR = 0x00;
+	FpgaSetupSsc();
+
+	if (wait) {
+		if(*wait < 10) *wait = 10;
+
+		for(c = 0; c < *wait;) {
+			if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+				AT91C_BASE_SSC->SSC_THR = 0x00;		// For exact timing!
+				c++;
+			}
+			if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+				volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
+				(void)r;
+			}
+			WDT_HIT();
+		}
+	}
+
+
+	uint8_t sendbyte;
+	bool firstpart = TRUE;
+	c = 0;
   for(;;) {
     if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
 
@@ -1354,7 +1435,7 @@ 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;
 }
 
 
@@ -1402,18 +1483,18 @@ void CodeIClassCommand(const uint8_t * cmd, int len)
 
 void ReaderTransmitIClass(uint8_t* frame, int len)
 {
-	int wait = 0;
-	int samples = 0;
+  int wait = 0;
+  int samples = 0;
 
-	// This is tied to other size changes
-	CodeIClassCommand(frame,len);
+  // This is tied to other size changes
+  CodeIClassCommand(frame,len);
 
-	// Select the card
-	TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait);
-	if(trigger)
-		LED_A_ON();
+  // Select the card
+  TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait);
+  if(trigger)
+  	LED_A_ON();
 
-	// Store reader command in buffer
+  // Store reader command in buffer
 	if (tracing) {
 		uint8_t par[MAX_PARITY_SIZE];
 		GetParity(frame, len, par);
@@ -1449,7 +1530,7 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples,
 	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!!
@@ -1487,9 +1568,9 @@ void setupIclassReader()
 {
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
     // Reset trace buffer
-	set_tracing(TRUE);
 	clear_trace();
-
+	set_tracing(TRUE);
+	
     // Setup SSC
     FpgaSetupSsc();
     // Start from off (no field generated)
@@ -1508,16 +1589,16 @@ 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
 }
 
 /**
@@ -1527,12 +1608,18 @@ 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 };
+	if (use_credit_key)
+		readcheck_cc[0] = 0x18;
+	else
+		readcheck_cc[0] = 0x88;
+
 	uint8_t resp[ICLASS_BUFFER_SIZE];
 
 	uint8_t read_status = 0;
@@ -1567,63 +1654,114 @@ uint8_t handshakeIclassTag(uint8_t *card_data)
 	if(ReaderReceiveIClass(resp) == 8) {
 		//Save CC (e-purse) in response data
 		memcpy(card_data+8,resp,8);
-
-		//Got both
-		read_status = 2;
+		read_status++;
 	}
 
 	return read_status;
 }
+uint8_t handshakeIclassTag(uint8_t *card_data){
+	return handshakeIclassTag_ext(card_data, false);
+}
+
 
 // Reader iClass Anticollission
 void ReaderIClass(uint8_t arg0) {
 
-    uint8_t card_data[24]={0};
+	uint8_t card_data[6 * 8]={0};
+	memset(card_data, 0xFF, sizeof(card_data));
     uint8_t last_csn[8]={0};
 	
+	//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
+	uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x05, 0xde, 0x64};
+
+
     int read_status= 0;
+	uint8_t result_status = 0;
     bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
-	bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC;
+	bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY;
+	bool use_credit_key = false;
+	if (arg0 & FLAG_ICLASS_READER_CEDITKEY)
+		use_credit_key = true;
 	set_tracing(TRUE);
     setupIclassReader();
 
-    size_t datasize = 0;
+	uint16_t tryCnt=0;
     while(!BUTTON_PRESS())
     {
-
+		if (try_once && tryCnt > 5) 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) datasize = 8;
-		if(read_status == 2) datasize = 16;
-
-		LED_B_ON();
-		//Send back to client, but don't bother if we already sent this
-		if(memcmp(last_csn, card_data, 8) != 0)
+		if(read_status == 1) result_status = FLAG_ICLASS_READER_CSN;
+		if(read_status == 2) result_status = FLAG_ICLASS_READER_CSN|FLAG_ICLASS_READER_CC;
+
+		// handshakeIclass returns CSN|CC, but the actual block
+		// layout is CSN|CONFIG|CC, so here we reorder the data,
+		// 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))
+			{
+				result_status |= FLAG_ICLASS_READER_CONF;
+			} else {
+				Dbprintf("Failed to dump config block");
+			}
+		}
 
-			if(!get_cc || (get_cc && read_status == 2))
+		//Read block 5, AA
+		if(arg0 & FLAG_ICLASS_READER_AA){
+			if(sendCmdGetResponseWithRetries(readAA, sizeof(readAA),card_data+(8*4), 10, 10))
+			{
+				result_status |= FLAG_ICLASS_READER_AA;
+			} else {
+				//Dbprintf("Failed to dump AA block");
+			}
+		}
+
+		// 0 : CSN
+		// 1 : Configuration
+		// 2 : e-purse
+		// (3,4 write-only, kc and kd)
+		// 5 Application issuer area
+		//
+		//Then we can 'ship' back the 8 * 5 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
+                    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))
 			{
-				cmd_send(CMD_ACK,read_status,0,0,card_data,datasize);
+				cmd_send(CMD_ACK,result_status,0,0,card_data,sizeof(card_data));
 				if(abort_after_read) {
 					LED_A_OFF();
+					set_tracing(FALSE);	
 					return;
 				}
 				//Save that we already sent this....
 				memcpy(last_csn, card_data, 8);
 			}
-			//If 'get_cc' was specified and we didn't get a CC, we'll just keep trying...
 		}
 		LED_B_OFF();
     }
     cmd_send(CMD_ACK,0,0,0,card_data, 0);
     LED_A_OFF();
+	set_tracing(FALSE);		
 }
 
 void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
@@ -1674,7 +1812,7 @@ 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;
@@ -1686,26 +1824,26 @@ 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;
 		}
 
-		mem=resp[5];
-		memory.k16= (mem & 0x80);
-		memory.book= (mem & 0x20);
-		memory.k2= (mem & 0x8);
-		memory.lockauth= (mem & 0x2);
-		memory.keyaccess= (mem & 0x1);
+		 mem=resp[5];
+		 memory.k16= (mem & 0x80);
+		 memory.book= (mem & 0x20);
+		 memory.k2= (mem & 0x8);
+		 memory.lockauth= (mem & 0x2);
+		 memory.keyaccess= (mem & 0x1);
 
 		cardsize = memory.k16 ? 255 : 32;
 		WDT_HIT();
 		//Set card_data to all zeroes, we'll fill it with data
 		memset(card_data,0x0,USB_CMD_DATA_SIZE);
 		uint8_t failedRead =0;
-		uint8_t stored_data_length =0;
-		//then loop around remaining blocks
+		uint32_t stored_data_length =0;
+				//then loop around remaining blocks
 		for(int block=0; block < cardsize; block++){
 
 			read[1]= block;
@@ -1713,17 +1851,16 @@ 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],
-						resp[3], resp[4], resp[5],
-						resp[6], resp[7]);
+					block, resp[0], resp[1], resp[2],
+					resp[3], resp[4], resp[5],
+					resp[6], resp[7]);
 
 				//Fill up the buffer
 				memcpy(card_data+stored_data_length,resp,8);
 				stored_data_length += 8;
-
 				if(stored_data_length +8 > USB_CMD_DATA_SIZE)
 				{//Time to send this off and start afresh
 					cmd_send(CMD_ACK,
@@ -1735,13 +1872,13 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
 					stored_data_length = 0;
 					failedRead = 0;
 				}
-
-			}else{
+			} else {
 				failedRead = 1;
 				stored_data_length +=8;//Otherwise, data becomes misaligned
 				Dbprintf("Failed to dump block %d", block);
 			}
 		}
+
 		//Send off any remaining data
 		if(stored_data_length > 0)
 		{
@@ -1762,132 +1899,132 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
 			 card_data, 0);
 
 	LED_A_OFF();
+	set_tracing(FALSE);		
 }
 
-//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;
-
-	// 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_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);
+}
 
-	SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+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;
+}
 
-	// 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_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);
+}
 
-	LED_A_ON();
+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;
 
-	for(int i=0;i<1;i++) {
-	
-		if(traceLen > TRACE_SIZE) {
-			DbpString("Trace full");
+	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;
 		}
-		
-		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]);
+		}
+		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();
+}
+
+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 };
+	//uint8_t readblockdata[10];
+	//write[1] = blockNo;
+	memcpy(write+2, data, 12); // data + mac
+	uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0};
+	bool isOK;
+	isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10);
+	if (isOK) {
+		//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)) {
+			//error try again
+			isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10);
+		}
+	}
+	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("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;
-				}
-			}//
+		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();
+}