From: iceman1001 <iceman@iuse.se>
Date: Thu, 6 Oct 2016 17:13:23 +0000 (+0200)
Subject: ADD:  "hf legic eload" - Load binary file to emulator memory. Use "h" for help text
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/0e8cabed8d180d2e03ba0cc04c853dad501cff7a

ADD:  "hf legic eload" - Load binary file to emulator memory. Use "h" for help text
ADD:  "hf legic esave" - Save emulator memory to binary file. Use "h" for help text
---

diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index 549feff0..4d6a5fdf 100644
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -1052,22 +1052,18 @@ void UsbPacketReceived(uint8_t *packet, int len)
 		case CMD_SIMULATE_TAG_LEGIC_RF:
 			LegicRfSimulate(c->arg[0], c->arg[1], c->arg[2]);
 			break;
-
 		case CMD_WRITER_LEGIC_RF:
-			LegicRfWriter( c->arg[0], c->arg[1], c->arg[2]);
-			break;
-
-		case CMD_RAW_WRITER_LEGIC_RF:
-			LegicRfRawWriter(c->arg[0], c->arg[1], c->arg[2]);
+			LegicRfWriter( c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
 			break;
-
 		case CMD_READER_LEGIC_RF:
 			LegicRfReader(c->arg[0], c->arg[1], c->arg[2]);
-			break;
-			
+			break;			
 		case CMD_LEGIC_INFO:
 			LegicRfInfo();
 			break;
+		case CMD_LEGIC_ESET:
+			LegicEMemSet(c->arg[0], c->arg[1], c->d.asBytes);
+			break;
 #endif
 
 #ifdef WITH_ISO14443b
@@ -1196,7 +1192,6 @@ void UsbPacketReceived(uint8_t *packet, int len)
 		case CMD_MIFARE_DESFIRE:
 			MifareSendCommand(c->arg[0], c->arg[1], c->d.asBytes);
 			break;
-
 		case CMD_MIFARE_COLLECT_NONCES:
 			break;
 #endif
@@ -1227,7 +1222,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
 		case CMD_READER_ICLASS_REPLAY:
 		    ReaderIClass_Replay(c->arg[0], c->d.asBytes);
 			break;
-	case CMD_ICLASS_EML_MEMSET:
+		case CMD_ICLASS_EML_MEMSET:
 			emlSet(c->d.asBytes,c->arg[0], c->arg[1]);
 			break;
 		case CMD_ICLASS_WRITEBLOCK:
diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c
index 766bd443..19f12a95 100644
--- a/armsrc/legicrf.c
+++ b/armsrc/legicrf.c
@@ -407,19 +407,15 @@ int legic_read_byte( uint16_t index, uint8_t cmd_sz) {
  * - wait until the tag sends back an ACK ('1' bit unencrypted)
  * - forward the prng based on the timing
  */
-//int legic_write_byte(int byte, int addr, int addr_sz, int PrngCorrection) {
-int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
-
-    //do not write UID, CRC at offset 0-4.
-	if (addr <= 4) return 0;
+int legic_write_byte(uint16_t index, uint8_t byte, uint8_t addr_sz) {
 
 	// crc
 	crc_clear(&legic_crc);
 	crc_update(&legic_crc, 0, 1); /* CMD_WRITE */
-	crc_update(&legic_crc, addr, addr_sz);
+	crc_update(&legic_crc, index, addr_sz);
 	crc_update(&legic_crc, byte, 8);
 	uint32_t crc = crc_finish(&legic_crc);
-	uint32_t crc2 = legic4Crc(LEGIC_WRITE, addr, byte, addr_sz+1);
+	uint32_t crc2 = legic4Crc(LEGIC_WRITE, index, byte, addr_sz+1);
 	if ( crc != crc2 ) {
 		Dbprintf("crc is missmatch");
 		return 1;
@@ -427,8 +423,8 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
 	// send write command
 	uint32_t cmd = ((crc     <<(addr_sz+1+8)) //CRC
                    |(byte    <<(addr_sz+1))   //Data
-                   |(addr    <<1)             //Address
-                   | LEGIC_WRITE);             //CMD = Write
+                   |(index    <<1)             //index
+                   | LEGIC_WRITE);            //CMD = Write
 				   
     uint32_t cmd_sz = addr_sz+1+8+4;          //crc+data+cmd
 
@@ -437,15 +433,16 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
 	WaitTicks(330);
 	
 	frame_sendAsReader(cmd, cmd_sz);
-   
+
+	// wait for ack
 	AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN;
 	AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN;
 
-	// wait for ack
     int t, old_level = 0, edges = 0;
     int next_bit_at = 0;
 
-	WaitTicks(TAG_FRAME_WAIT);
+	// ACK 3.6ms = 3600us * 1.5 = 5400ticks.
+	WaitTicks(5360);
 
     for( t = 0; t < 80; ++t) {
         edges = 0;
@@ -457,7 +454,8 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
 
             old_level = level;
         }
-        if(edges > 20 ) { /* expected are 42 edges */
+		/* expected are 42 edges (ONE) */
+        if(edges > 20 ) {
 			int t = timer->TC_CV;
 			int c = t / TAG_BIT_PERIOD;
 			
@@ -467,7 +465,6 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
         }
     }
 
-	ResetTimer(timer);
 	return -1;
 }
 
@@ -512,51 +509,16 @@ OUT:
     return 0;
 }
 
-/*int _LegicRfWriter(int offset, int bytes, int addr_sz, uint8_t *BigBuf, int RoundBruteforceValue) {
-	int byte_index=0;
-
-    LED_B_ON();
-	setup_phase_reader(iv);
-    //legic_prng_forward(2);
-	while(byte_index < bytes) {
-		int r;
-
-		//check if the DCF should be changed
-		if ( (offset == 0x05) && (bytes == 0x02) ) {
-			//write DCF in reverse order (addr 0x06 before 0x05)
-			r = legic_write_byte(BigBuf[(0x06-byte_index)], (0x06-byte_index), addr_sz, RoundBruteforceValue);
-			//legic_prng_forward(1);
-			if(r == 0) {
-				byte_index++;
-				r = legic_write_byte(BigBuf[(0x06-byte_index)], (0x06-byte_index), addr_sz, RoundBruteforceValue);
-			}
-			//legic_prng_forward(1);
-		}
-		else {
-			r = legic_write_byte(BigBuf[byte_index+offset], byte_index+offset, addr_sz, RoundBruteforceValue);
-		}
-		if((r != 0) || BUTTON_PRESS()) {
-			Dbprintf("operation aborted @ 0x%03.3x", byte_index);
-	switch_off_tag_rwd();
-			LED_B_OFF();
-			LED_C_OFF();
-			return -1;
-		}
-
-        WDT_HIT();
-		byte_index++;
-        if(byte_index & 0x10) LED_C_ON(); else LED_C_OFF();
-	}
-    LED_B_OFF();
-    LED_C_OFF();
-    DbpString("write successful");
-    return 0;
-}*/
-
-void LegicRfWriter(uint16_t offset, uint16_t bytes, uint8_t iv) {
+void LegicRfWriter(uint16_t offset, uint16_t len, uint8_t iv, uint8_t *data) {
 
-	int byte_index = 0;  
 	uint8_t isOK = 1;
+	
+	// UID not is writeable.
+	if ( offset <= 4 ) {
+		isOK = 0;
+		goto OUT;
+	}
+	
 	legic_card_select_t card;
 	
 	LegicCommonInit();
@@ -566,63 +528,40 @@ void LegicRfWriter(uint16_t offset, uint16_t bytes, uint8_t iv) {
 		goto OUT;
 	}
 	
-	switch_off_tag_rwd();
-	
-	switch(card.tagtype) {
-		case 0x0d:
-			if(offset+bytes > 22) {
-				Dbprintf("Error: can not write to 0x%03.3x on MIM22", offset + bytes);
-				return;
-			}
-			if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset + bytes);
-			break;
-		case 0x1d:
-			if(offset+bytes > 0x100) {
-				Dbprintf("Error: can not write to 0x%03.3x on MIM256", offset + bytes);
-				return;
-			}
-			if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset + bytes);
-			break;
-		case 0x3d:
-			if(offset+bytes > 0x400) {
-          		Dbprintf("Error: can not write to 0x%03.3x on MIM1024", offset + bytes);
-           		return;
-          	}
-			if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing 0x%03.3x - 0x%03.3x ...", offset, offset + bytes);
-			break;
-		default:
-            return;
-	}
+	if (len + offset >= card.cardsize)
+		len = card.cardsize - offset;
 
-    LED_B_ON();
 	setup_phase_reader(iv);
-	
-	int r = 0;
-	while(byte_index < bytes) {
 
-		//check if the DCF should be changed
-		if ( ((byte_index+offset) == 0x05) && (bytes >= 0x02) ) {
-			//write DCF in reverse order (addr 0x06 before 0x05)
-			r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), card.addrsize);
-
-			// write second byte on success
-			if(r == 0) {
-				byte_index++;
-				r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), card.addrsize);
-			}
-		}
-		else {
-			r = legic_write_byte(cardmem[byte_index+offset], byte_index+offset, card.addrsize);
-		}
+    LED_B_ON();	
+	int r = 0;
+	// how about we write backwards instead. no need for this extra DCF check.	
+	// index = len - cardsize
+	// stops uid 01234, 
+	/*
+	len = 20
+	offset = 5
+	
+	index = 20+5 = 25
+	if ( index > cardsize ) return -1;
+	
+	loop
+		write( cardmem[index], index , card.addrsize);
+		--index;
+	end loop	
+	*/
+	uint16_t index = len;
+	while(index > 4) {
+
+		r = legic_write_byte( index, cardmem[ index ], card.addrsize);
 		
-		if ((r != 0) || BUTTON_PRESS()) {
-			Dbprintf("operation aborted @ 0x%03.3x", byte_index);
+		if ( r ) {
+			Dbprintf("operation aborted @ 0x%03.3x", index);
 			isOK = 0;
 			goto OUT;
 		}
-
-        WDT_HIT();
-		byte_index++;
+		--index;
+		WDT_HIT();
 	}
 
 OUT:
@@ -631,66 +570,6 @@ OUT:
 	LEDsoff();	
 }
 
-void LegicRfRawWriter(int address, int byte, uint8_t iv) {
-
-	int byte_index = 0, addr_sz = 0;
-	
-	LegicCommonInit();
-	
-	if ( MF_DBGLEVEL >= 2) DbpString("setting up legic card");
-	
-	uint32_t tag_type = setup_phase_reader(iv);
-	
-	switch_off_tag_rwd();
-	
-	switch(tag_type) {
-		case 0x0d:
-			if(address > 22) {
-				Dbprintf("Error: can not write to 0x%03.3x on MIM22", address);
-				return;
-			}
-			addr_sz = 5;
-			if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing at addr 0x%02.2x - value 0x%02.2x ...", address, byte);
-			break;
-		case 0x1d:
-			if(address > 0x100) {
-				Dbprintf("Error: can not write to 0x%03.3x on MIM256", address);
-				return;
-			}
-			addr_sz = 8;
-			if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing at addr 0x%02.2x - value 0x%02.2x ...", address, byte);
-			break;
-		case 0x3d:
-			if(address > 0x400) {
-          		Dbprintf("Error: can not write to 0x%03.3x on MIM1024", address);
-           		return;
-          	}
-			addr_sz = 10;
-			if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing at addr 0x%03.3x - value 0x%03.3x ...", address, byte);
-			break;
-		default:
-			Dbprintf("No or unknown card found, aborting");
-            return;
-	}
-	
-	Dbprintf("integer value: %d address: %d  addr_sz: %d", byte, address, addr_sz);
-    LED_B_ON();
-	
-	setup_phase_reader(iv);
-    		
-	int r = legic_write_byte(byte, address, addr_sz);
-		
-	if((r != 0) || BUTTON_PRESS()) {
-		Dbprintf("operation aborted @ 0x%03.3x (%1d)", byte_index, r);
-		switch_off_tag_rwd();
-		LEDsoff();
-		return;
-	}
-
-    LEDsoff();
-    if ( MF_DBGLEVEL >= 1) DbpString("write successful");
-}
-
 int legic_select_card_iv(legic_card_select_t *p_card, uint8_t iv){
 
 	if ( p_card == NULL ) return 1;
@@ -725,8 +604,42 @@ int legic_select_card(legic_card_select_t *p_card){
 	return legic_select_card_iv(p_card, 0x01);
 }
 
+//-----------------------------------------------------------------------------
+// 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.
+//-----------------------------------------------------------------------------
+// arg0 = offset
+// arg1 = num of bytes
+void LegicEMemSet(uint32_t arg0, uint32_t arg1, uint8_t *data) {
+	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+	legic_emlset_mem(data, arg0, arg1);
+}
+// arg0 = offset
+// arg1 = num of bytes
+void LegicEMemGet(uint32_t arg0, uint32_t arg1) {
+	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+	uint8_t buf[USB_CMD_DATA_SIZE] = {0x00};
+	legic_emlget_mem(buf, arg0, arg1);
+	LED_B_ON();
+	cmd_send(CMD_ACK, arg0, arg1, 0, buf, USB_CMD_DATA_SIZE);
+	LED_B_OFF();
+}
+void legic_emlset_mem(uint8_t *data, int offset, int numofbytes) {
+	cardmem = BigBuf_get_EM_addr();
+	memcpy(cardmem + offset, data, numofbytes);
+}
+void legic_emlget_mem(uint8_t *data, int offset, int numofbytes) {
+	cardmem = BigBuf_get_EM_addr();
+	memcpy(data, cardmem + offset, numofbytes);
+}
+
 void LegicRfInfo(void){
 
+	int r;
+	
 	uint8_t buf[sizeof(legic_card_select_t)] = {0x00};
 	legic_card_select_t *card = (legic_card_select_t*) buf;
 	
@@ -739,7 +652,7 @@ void LegicRfInfo(void){
 
 	// read UID bytes
 	for ( uint8_t i = 0; i < sizeof(card->uid); ++i) {
-		int r = legic_read_byte(i, card->cmdsize);
+		r = legic_read_byte(i, card->cmdsize);
 		if ( r == -1 ) {
 			cmd_send(CMD_ACK,0,0,0,0,0);
 			goto OUT;
@@ -747,6 +660,15 @@ void LegicRfInfo(void){
 		card->uid[i] = r & 0xFF;
 	}
 
+	// MCC byte.
+	r = legic_read_byte(4, card->cmdsize);
+	uint32_t calc_mcc =  CRC8Legic(card->uid, 4);;
+	if ( r != calc_mcc) {
+		cmd_send(CMD_ACK,0,0,0,0,0);
+		goto OUT;
+	}
+	
+	// OK
 	cmd_send(CMD_ACK, 1, 0, 0, buf, sizeof(legic_card_select_t));
 
 OUT:
diff --git a/armsrc/legicrf.h b/armsrc/legicrf.h
index c4b3e582..8a51ebcd 100644
--- a/armsrc/legicrf.h
+++ b/armsrc/legicrf.h
@@ -22,8 +22,7 @@
 
 extern void LegicRfSimulate(int phase, int frame, int reqresp);
 extern int LegicRfReader(uint16_t offset, uint16_t len, uint8_t iv);
-extern void LegicRfWriter(uint16_t offset, uint16_t byte, uint8_t iv);
-extern void LegicRfRawWriter(int address, int data, uint8_t iv);
+extern void LegicRfWriter(uint16_t offset, uint16_t byte, uint8_t iv, uint8_t *data);
 extern void LegicRfInfo(void);
 
 uint32_t get_key_stream(int skip, int count);
@@ -31,9 +30,17 @@ void frame_send_tag(uint16_t response, uint8_t bits);
 void frame_sendAsReader(uint32_t data, uint8_t bits);
 
 int legic_read_byte( uint16_t index, uint8_t cmd_sz);
+int legic_write_byte(uint16_t index, uint8_t byte, uint8_t addr_sz);
 
 int legic_select_card(legic_card_select_t *p_card);
 int legic_select_card_iv(legic_card_select_t *p_card, uint8_t iv);
+
+// emulator mem
+void LegicEMemSet(uint32_t arg0, uint32_t arg1, uint8_t *data);
+void LegicEMemGet(uint32_t arg0, uint32_t arg1);
+void legic_emlset_mem(uint8_t *data, int offset, int numofbytes);
+void legic_emlget_mem(uint8_t *data, int offset, int numofbytes);
+
 void ice_legic_setup();
 
 #endif /* __LEGICRF_H */
diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c
index b9a51b63..d544a91c 100644
--- a/client/cmdhflegic.c
+++ b/client/cmdhflegic.c
@@ -84,10 +84,6 @@ int usage_legic_rawwrite(void){
 	PrintAndLog("      hf legic writeraw 10 4    - writes 0x4 to byte[0x10]");
 	return 0;
 }
-int usage_legic_fill(void){
-	PrintAndLog("Missing help text.");
-	return 0;
-}
 int usage_legic_reader(void){
 	PrintAndLog("Read UID and type information from a legic tag.");
 	PrintAndLog("Usage:  hf legic reader [h]");
@@ -124,6 +120,39 @@ int usage_legic_dump(void){
 	return 0;
 }
 
+int usage_legic_eload(void){
+	PrintAndLog("It loads binary dump from the file `filename.bin`");
+	PrintAndLog("Usage:  hf legic eload [h] [card memory] <file name w/o `.bin`>");
+	PrintAndLog("Options:");
+	PrintAndLog("  h             : this help");
+	PrintAndLog("  [card memory] : 0 = MIM22");
+	PrintAndLog("                : 1 = MIM256 (default)");
+	PrintAndLog("                : 2 = MIM1024");
+	PrintAndLog("  <filename>    : filename w/o .bin to load");	
+	PrintAndLog("");
+	PrintAndLog("Samples:");
+	PrintAndLog("      hf legic eload filename");
+	PrintAndLog("      hf legic eload 2 filename");
+	return 0;
+}
+int usage_legic_esave(void){
+	PrintAndLog("It saves binary dump into the file `filename.bin` or `cardID.bin`");
+	PrintAndLog(" Usage:  hf legic esave [h] [card memory] [file name w/o `.bin`]");
+	PrintAndLog("Options:");
+	PrintAndLog("  h             : this help");
+	PrintAndLog("  [card memory] : 0 = MIM22");
+	PrintAndLog("                : 1 = MIM256 (default)");
+	PrintAndLog("                : 2 = MIM1024");
+	PrintAndLog("  <filename>    : filename w/o .bin to load");	
+	PrintAndLog("");
+	PrintAndLog("Samples:");	
+	PrintAndLog("      hf legic esave ");
+	PrintAndLog("      hf legic esave 2");
+	PrintAndLog("      hf legic esave 2 filename");
+	return 0;
+}
+
+
 /*
  *  Output BigBuf and deobfuscate LEGIC RF tag data.
  *  This is based on information given in the talk held
@@ -166,6 +195,7 @@ int CmdLegicInfo(const char *Cmd) {
 		(calc_crc == crc) ? "OK":"Fail"
 	);
  
+	// MCD = Manufacturer ID (should be list meaning something?)
 
 	token_type[0] = 0;
 	dcf = ((int)data[6] << 8) | (int)data[5];
@@ -434,15 +464,7 @@ int CmdLegicRdmem(const char *Cmd) {
 		PrintAndLog("Out-of-bound, shorten len to %d (0x%02X)", len, len);
 	}
 	
-	if ( (IV & 0x7F) != IV ){
-		IV &= 0x7F;
-		PrintAndLog("Truncating IV to 7bits");
-	}
-	
-	if ( (IV & 1) == 0 ){
-		IV |= 0x01;
-		PrintAndLog("LSB of IV must be SET");	
-	}
+	legic_chk_iv(&IV);
 	
 	UsbCommand c = {CMD_READER_LEGIC_RF, {offset, len, IV}};
 	clearCommandBuffer();
@@ -484,6 +506,8 @@ int CmdLegicRdmem(const char *Cmd) {
 	return 0;
 }
 
+// load, filename  (ascii hex textfile)
+// uploads it to device mem
 int CmdLegicLoad(const char *Cmd) {
 
 // iceman: potential bug, where all filepaths or filename which starts with H or h will print the helptext :)	
@@ -563,6 +587,9 @@ int CmdLegicLoad(const char *Cmd) {
     return 0;
 }
 
+// Save,  filename, num of bytes, starting offset. (in decimal)
+//  ie:  "hf legic save nnn.txt 100 0  (saves the first 100bytes)
+// (ascii hex textfile)
 int CmdLegicSave(const char *Cmd) {
 	int requested = 1024;
 	int offset = 0;
@@ -616,6 +643,8 @@ int CmdLegicSave(const char *Cmd) {
 }
 
 //TODO: write a help text (iceman)
+// should say which tagtype
+// should load a tag to device mem.
 int CmdLegicRfSim(const char *Cmd) {
 	UsbCommand c = {CMD_SIMULATE_TAG_LEGIC_RF, {6,3,0}};
 	sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]);
@@ -626,11 +655,9 @@ int CmdLegicRfSim(const char *Cmd) {
 
 int CmdLegicRfWrite(const char *Cmd) {
 
-	// params:
 	// offset - in tag memory
 	// length - num of bytes to be written
-	// IV - initialisation vector
-	
+
 	char cmdp = param_getchar(Cmd, 0);
 	if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_write();
 	
@@ -641,31 +668,32 @@ int CmdLegicRfWrite(const char *Cmd) {
 		PrintAndLog("Please specify the offset and length as two hex strings and, optionally, the IV also as an hex string");
         return -1;
     }
+	
+	// tagtype
+	legic_card_select_t card;
+	if (legic_get_type(&card)) {
+		PrintAndLog("Failed to identify tagtype");
+		return -1;
+	}
 
+	legic_print_type(card.cardsize, 0);
+	
 	// OUT-OF-BOUNDS check
-	if ( len + offset > MAX_LENGTH ) {
-		len = MAX_LENGTH - offset;
-		PrintAndLog("Out-of-bound, shorten len to %d (0x%02X)", len, len);
-	}
-	if ( (IV & 0x7F) != IV ){
-		IV &= 0x7F;
-		PrintAndLog("Truncating IV to 7bits");
-	}
-	if ( (IV & 1) == 0 ){
-		IV |= 0x01;  // IV must be odd
-		PrintAndLog("LSB of IV must be SET");	
+	if ( len + offset > card.cardsize ) {
+		PrintAndLog("Out-of-bounds, Cardsize = %d, [offset+len = %d ]", card.cardsize, len + offset);
+		return -2;
 	}
 	
+	legic_chk_iv(&IV);
+	
     UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}};	
 	clearCommandBuffer();
     SendCommand(&c);
 	UsbCommand resp;
 	if (WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
 		uint8_t isOK = resp.arg[0] & 0xFF;
-		 if ( isOK ) {
-		 } else {
-			 PrintAndLog("failed writig tag");
-		 }
+		 if ( !isOK )
+			 PrintAndLog("failed writing tag");
 	} else {
 		PrintAndLog("command execution time out");
 		return 1;
@@ -720,31 +748,6 @@ int CmdLegicRfRawWrite(const char *Cmd) {
 	return 0;
 }
 
-//TODO: write a help text (iceman)
-int CmdLegicRfFill(const char *Cmd) {
-    UsbCommand cmd = {CMD_WRITER_LEGIC_RF, {0,0,0} };
-    int res = sscanf(Cmd, " 0x%"llx" 0x%"llx" 0x%"llx, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]);
-    if(res != 3) {
-        PrintAndLog("Please specify the offset, length and value as two hex strings");
-        return -1;
-    }
-
-    int i;
-    UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 0, 0}};
-	memset(c.d.asBytes, cmd.arg[2], 48);
-
-	for(i = 0; i < 22; i++) {
-		c.arg[0] = i*48;
-		
-		clearCommandBuffer();
-		SendCommand(&c);
-		WaitForResponse(CMD_ACK, NULL);
-	}
-	clearCommandBuffer();
-    SendCommand(&cmd);
-    return 0;
- }
-
 void static calc4(uint8_t *cmd, uint8_t len){
 	crc_t crc;
  	//crc_init_ref(&crc, 4, 0x19 >> 1, 0x5, 0, TRUE, TRUE);
@@ -898,6 +901,34 @@ int legic_get_type(legic_card_select_t *card){
 	memcpy(card, (legic_card_select_t *)resp.d.asBytes, sizeof(legic_card_select_t));
 	return 0;
 }
+void legic_chk_iv(uint32_t *iv){
+	if ( (*iv & 0x7F) != *iv ){
+		*iv &= 0x7F;
+		PrintAndLog("Truncating IV to 7bits, %u", *iv);
+	}
+	// IV must be odd
+	if ( (*iv & 1) == 0 ){
+		*iv |= 0x01;  
+		PrintAndLog("LSB of IV must be SET %u", *iv);	
+	}
+}
+
+void legic_seteml(uint8_t *src, uint32_t offset, uint32_t numofbytes) {
+
+	size_t len = 0;
+	UsbCommand c = {CMD_LEGIC_ESET, {0, 0, 0}};	
+
+	for(size_t i = 0; i < numofbytes; i += USB_CMD_DATA_SIZE) {
+		
+		len = MIN((numofbytes - i), USB_CMD_DATA_SIZE);		
+		c.arg[0] = i; // offset
+		c.arg[1] = len; // number of bytes
+		memcpy(c.d.asBytes, src, len); 
+		clearCommandBuffer();
+		SendCommand(&c);
+		PrintAndLog("ICE: offset %d | len %d", i, len);
+	}
+}
 
 int HFLegicReader(const char *Cmd, bool verbose) {
 
@@ -925,7 +956,7 @@ int CmdLegicReader(const char *Cmd){
 
 int CmdLegicDump(const char *Cmd){
 
-	FILE *fout;
+	FILE *f;
 	char filename[FILE_PATH_SIZE] = {0x00};
 	char *fnameptr = filename;
 	size_t fileNlen = 0;
@@ -933,24 +964,26 @@ int CmdLegicDump(const char *Cmd){
 	uint16_t dumplen;	
 	uint8_t cmdp = 0;
 	
-	while(param_getchar(Cmd, cmdp) != 0x00)
-	{
-		switch(param_getchar(Cmd, cmdp))
-		{
-		case 'h':
-		case 'H':
-			return usage_legic_dump();
-		case 'o':
-		case 'O':
-			fileNlen = param_getstr(Cmd, cmdp+1, filename);
-			if (!fileNlen) errors = true; 
-			if (fileNlen > FILE_PATH_SIZE-5) fileNlen = FILE_PATH_SIZE-5;
-			cmdp += 2;
-			break;
-		default:
-			PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
-			errors = true;
-			break;
+	memset(filename, 0, sizeof(filename));
+	
+	while(param_getchar(Cmd, cmdp) != 0x00) {
+		switch(param_getchar(Cmd, cmdp)) {
+			case 'h':
+			case 'H':
+				return usage_legic_dump();
+			case 'o':
+			case 'O':
+				fileNlen = param_getstr(Cmd, cmdp+1, filename);
+				if (!fileNlen) 
+					errors = true; 
+				if (fileNlen > FILE_PATH_SIZE-5) 
+					fileNlen = FILE_PATH_SIZE-5;
+				cmdp += 2;
+				break;
+			default:
+				PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+				errors = true;
+				break;
 		}
 		if(errors) break;
 	}
@@ -986,7 +1019,7 @@ int CmdLegicDump(const char *Cmd){
 
 	uint16_t readlen = resp.arg[1];
 	uint8_t *data = malloc(readlen);
-	if ( !data ){
+	if (!data) {
 		PrintAndLog("Fail, cannot allocate memory");
 		return 3;
 	}
@@ -998,7 +1031,7 @@ int CmdLegicDump(const char *Cmd){
 	GetEMLFromBigBuf(data, readlen, 0);
 	if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)) {
 		PrintAndLog("Fail, transfer from device time-out");
-		if ( data ) free(data);
+		free(data);
 		return 4;
 	}
 
@@ -1008,18 +1041,140 @@ int CmdLegicDump(const char *Cmd){
 	else
 		sprintf(fnameptr + fileNlen,".bin");
 
-	if ((fout = fopen(filename,"wb")) == NULL) { 
+	if ((f = fopen(filename,"wb")) == NULL) { 
 		PrintAndLog("Could not create file name %s", filename);
-		if ( data ) free(data);
+		if (data)
+			free(data);
 		return 5;
 	}
-	fwrite( data, 1, readlen, fout );
-	fclose(fout);
-	if ( data ) free(data);
-	
+	fwrite(data, 1, readlen, f);
+	fclose(f);
+	free(data);
 	PrintAndLog("Wrote %d bytes to %s", readlen, filename);
 	return 0;
 }	
+
+int CmdLegicELoad(const char *Cmd) {
+	FILE * f;
+	char filename[FILE_PATH_SIZE];
+	char *fnameptr = filename;
+	int len, numofbytes;
+	int nameParamNo = 1;
+	
+	char cmdp = param_getchar(Cmd, 0);		
+	if ( cmdp == 'h' || cmdp == 'H' || cmdp == 0x00)
+		return usage_legic_eload();
+
+	switch (cmdp) {
+		case '0' : numofbytes = 22; break;
+		case '1' : 
+		case '\0': numofbytes = 256; break;
+		case '2' : numofbytes = 1024; break;
+		default  : numofbytes = 256;  nameParamNo = 0;break;
+	}
+
+	// set up buffer
+	uint8_t *data = malloc(numofbytes);
+	if (!data) {
+		PrintAndLog("Fail, cannot allocate memory");
+		return 3;		
+	}
+	memset(data, 0, numofbytes);
+	
+	// set up file
+	len = param_getstr(Cmd, nameParamNo, filename);
+	if (len > FILE_PATH_SIZE - 5) 
+		len = FILE_PATH_SIZE - 5;
+	fnameptr += len;
+	sprintf(fnameptr, ".bin"); 	
+	
+	// open file
+	if ((f = fopen(filename,"rb")) == NULL) { 
+		PrintAndLog("File %s not found or locked", filename);
+		free(data);
+		return 1;
+	}
+
+	// load file
+	size_t bytes_read = fread(data, 1, numofbytes, f);
+	if ( bytes_read == 0){
+		PrintAndLog("File reading error");
+		free(data);
+		fclose(f);
+		return 2;
+	}
+	fclose(f);
+	
+	// transfer to device
+	legic_seteml(data, 0, numofbytes);
+		
+	free(data);	
+	PrintAndLog("\nLoaded %d bytes from file: %s  to emulator memory", numofbytes, filename);
+	return 0;
+}
+
+int CmdLegicESave(const char *Cmd) {
+	FILE *f;
+	char filename[FILE_PATH_SIZE];
+	char *fnameptr = filename;
+	int fileNlen, numofbytes, nameParamNo = 1;
+	
+	memset(filename, 0, sizeof(filename));
+
+	char cmdp = param_getchar(Cmd, 0);
+	
+	if ( cmdp == 'h' || cmdp == 'H' || cmdp == 0x00)
+		return usage_legic_esave();
+
+	switch (cmdp) {
+		case '0' : numofbytes = 22; break;
+		case '1' : 
+		case '\0': numofbytes = 256; break;
+		case '2' : numofbytes = 1024; break;
+		default  : numofbytes = 256; nameParamNo = 0; break;
+	}
+
+	fileNlen = param_getstr(Cmd, nameParamNo, filename);
+	
+	if (fileNlen > FILE_PATH_SIZE - 5) 
+		fileNlen = FILE_PATH_SIZE - 5;
+
+	// set up buffer
+	uint8_t *data = malloc(numofbytes);
+	if (!data) {
+		PrintAndLog("Fail, cannot allocate memory");
+		return 3;		
+	}
+	memset(data, 0, numofbytes);
+		
+	// download emulator memory
+	PrintAndLog("Reading emulator memory...");
+	
+	GetEMLFromBigBuf(data, numofbytes, 0);
+	if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)) {
+		PrintAndLog("Fail, transfer from device time-out");
+		free(data);
+		return 4;
+	}
+
+	// user supplied filename?
+	if (fileNlen < 1)		
+		sprintf(fnameptr,"%02X%02X%02X%02X.bin", data[0], data[1], data[2], data[3]);
+	else
+		sprintf(fnameptr + fileNlen,".bin");
+	
+	// open file
+	if ((f = fopen(filename,"wb")) == NULL) { 
+		PrintAndLog("Could not create file name %s", filename);
+		free(data);
+		return 1;
+	}
+	fwrite(data, 1, numofbytes, f);
+	fclose(f);
+	free(data);
+	PrintAndLog("\nSaved %d bytes from emulator memory to file: %s", numofbytes, filename);
+	return 0;
+}
 	
 static command_t CommandTable[] =  {
 	{"help",	CmdHelp,			1, "This help"},
@@ -1031,9 +1186,9 @@ static command_t CommandTable[] =  {
 	{"load",	CmdLegicLoad,		0, "<filename> -- Restore samples"},
 	{"sim",		CmdLegicRfSim,		0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},
 	{"write",	CmdLegicRfWrite,	0, "<offset> <length> <iv> -- Write sample buffer (user after load or read)"},
-	{"writeraw",CmdLegicRfRawWrite,	0, "<address> <value> <iv> -- Write direct to address"},
-	{"fill",	CmdLegicRfFill,		0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
-	{"crc8",	CmdLegicCalcCrc8,	1, "Calculate Legic CRC8 over given hexbytes"},
+	{"crc8",	CmdLegicCalcCrc8,	1, "Calculate Legic CRC8 over given hexbytes"},	
+	{"eload",	CmdLegicELoad,		1, "Load binary dump to emulator memory"},
+	{"esave",	CmdLegicESave,		1, "Save emulator memory to binary file"},
 	{NULL, NULL, 0, NULL}
 };
 
diff --git a/client/cmdhflegic.h b/client/cmdhflegic.h
index fecde8e3..1de3d1cb 100644
--- a/client/cmdhflegic.h
+++ b/client/cmdhflegic.h
@@ -32,14 +32,18 @@ int CmdLegicSave(const char *Cmd);
 int CmdLegicRfSim(const char *Cmd);
 int CmdLegicRfWrite(const char *Cmd);
 int CmdLegicRfRawWrite(const char *Cmd);
-int CmdLegicRfFill(const char *Cmd);
 int CmdLegicCalcCrc8(const char *Cmd);
 int CmdLegicDump(const char *Cmd);
 int CmdLegicReader(const char *Cmd);
 
+int CmdLegicELoad(const char *Cmd);
+int CmdLegicESave(const char *Cmd);
+
 int HFLegicReader(const char *Cmd, bool verbose);
 int legic_print_type(uint32_t tagtype, uint8_t spaces);
 int legic_get_type(legic_card_select_t *card);
+void legic_chk_iv(uint32_t *iv);
+void legic_seteml(uint8_t *src, uint32_t offset, uint32_t numofbytes);
 
 int usage_legic_calccrc8(void);
 int usage_legic_load(void);
@@ -47,7 +51,6 @@ int usage_legic_rdmem(void);
 int usage_legic_sim(void);
 int usage_legic_write(void);
 int usage_legic_rawwrite(void);
-int usage_legic_fill(void);
 int usage_legic_reader(void);
 int usage_legic_info(void);
 int usage_legic_dump(void);
diff --git a/client/hid-flasher/usb_cmd.h b/client/hid-flasher/usb_cmd.h
index 1c61ebcf..82e4cecb 100644
--- a/client/hid-flasher/usb_cmd.h
+++ b/client/hid-flasher/usb_cmd.h
@@ -138,6 +138,8 @@ typedef struct {
 #define CMD_EPA_PACE_REPLAY                                               0x038B
 
 #define CMD_LEGIC_INFO													  0x03BC
+#define CMD_LEGIC_ESET													  0x03BD
+#define CMD_LEGIC_EGET													  0x03BE
 
 #define CMD_SNOOP_ICLASS                                                  0x0392
 #define CMD_SIMULATE_TAG_ICLASS                                           0x0393
diff --git a/client/lualibs/commands.lua b/client/lualibs/commands.lua
index 680e6da9..2347ffe5 100644
--- a/client/lualibs/commands.lua
+++ b/client/lualibs/commands.lua
@@ -104,7 +104,10 @@ local _commands = {
 	CMD_EPA_PACE_REPLAY =                                                0x038B,
 
 	CMD_LEGIC_INFO =													 0x03BC,
-	
+	CMD_LEGIC_ESET =													 0x03BD,
+	CMD_LEGIC_EGET =													 0x03BE,
+
+
 	CMD_ICLASS_READCHECK =                                               0x038F,
 	CMD_ICLASS_CLONE =                                                   0x0390,
 	CMD_ICLASS_DUMP =                                                    0x0391,
diff --git a/include/usb_cmd.h b/include/usb_cmd.h
index a0ce4223..3fd2cedd 100644
--- a/include/usb_cmd.h
+++ b/include/usb_cmd.h
@@ -147,6 +147,8 @@ typedef struct{
 #define CMD_EPA_PACE_REPLAY                                               0x038B
 
 #define CMD_LEGIC_INFO													  0x03BC
+#define CMD_LEGIC_ESET													  0x03BD
+#define CMD_LEGIC_EGET													  0x03BE
 
 #define CMD_ICLASS_READCHECK                                              0x038F
 #define CMD_ICLASS_CLONE                                                  0x0390