X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/9015ae0f5dec6a7922ff6ce30eb62ad7a0e6cf5b..3e5b5bb2da079dae34dc42ff3947e2d9384f1992:/client/cmdhflegic.c?ds=inline

diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c
index b9a51b63..62c43f04 100644
--- a/client/cmdhflegic.c
+++ b/client/cmdhflegic.c
@@ -13,86 +13,72 @@ static int CmdHelp(const char *Cmd);
 
 #define MAX_LENGTH 1024	
 
-int usage_legic_calccrc8(void){
-	PrintAndLog("Calculates the legic crc8/crc16 on the input hexbytes.");
+int usage_legic_calccrc(void){
+	PrintAndLog("Calculates the legic crc8/crc16 on the given data.");
 	PrintAndLog("There must be an even number of hexsymbols as input.");
-	PrintAndLog("Usage:  hf legic crc8 [h] b <hexbytes> u <uidcrc> c <crc type>");
+	PrintAndLog("Usage:  hf legic crc [h] d <data> u <uidcrc> c <8|16>");
 	PrintAndLog("Options:");
 	PrintAndLog("      h             : this help");
-	PrintAndLog("      b <hexbytes>  : hex bytes");
+	PrintAndLog("      d <data>      : (hex symbols) bytes to calculate crc over");
 	PrintAndLog("      u <uidcrc>    : MCC hexbyte");
-	PrintAndLog("      c <crc type>  : 8|16 bit crc size");
+	PrintAndLog("      c <8|16>      : Crc type");
 	PrintAndLog("");
 	PrintAndLog("Samples:");
-	PrintAndLog("      hf legic crc8 b deadbeef1122");
-	PrintAndLog("      hf legic crc8 b deadbeef1122 u 9A c 16");
-	return 0;
-}
-int usage_legic_load(void){
-	PrintAndLog("It loads datasamples from the file `filename` to device memory");
-	PrintAndLog("Usage:  hf legic load [h] <file name>");
-	PrintAndLog("Options:");
-	PrintAndLog("  h             : this help");
-	PrintAndLog("  <filename>    : Name of file to load");
-	PrintAndLog("");
-	PrintAndLog("Samples:");
-	PrintAndLog("      hf legic load filename");
+	PrintAndLog("      hf legic crc b deadbeef1122");
+	PrintAndLog("      hf legic crc b deadbeef1122 u 9A c 16");
 	return 0;
 }
 int usage_legic_rdmem(void){	
 	PrintAndLog("Read data from a legic tag.");
 	PrintAndLog("Usage:  hf legic rdmem [h] <offset> <length> <IV>");
 	PrintAndLog("Options:");
-	PrintAndLog("  h             : this help");
-	PrintAndLog("  <offset>      : offset in data array to start download from (hex)");
-	PrintAndLog("  <length>      : number of bytes to read (hex)");
-	PrintAndLog("  <IV>          : (optional) Initialization vector to use (hex, odd and 7bits)");
+	PrintAndLog("      h             : this help");
+	PrintAndLog("      <offset>      : (hex) offset in data array to start download from");
+	PrintAndLog("      <length>      : (hex) number of bytes to read");
+	PrintAndLog("      <IV>          : (hex) (optional) Initialization vector to use. Must be odd and 7bits max");
 	PrintAndLog("");
 	PrintAndLog("Samples:");
-	PrintAndLog("      hf legic rdmem 0 21        - reads from byte[0] 21 bytes(system header)");
-	PrintAndLog("      hf legic rdmem 0 4 55      - reads from byte[0] 4 bytes with IV 0x55");
-	PrintAndLog("      hf legic rdmem 0 100 55    - reads 256bytes with IV 0x55");
+	PrintAndLog("      hf legic rdmem 0 16        - reads from byte[0] 0x16 bytes(system header)");
+	PrintAndLog("      hf legic rdmem 0 4 55      - reads from byte[0] 0x4 bytes with IV 0x55");
+	PrintAndLog("      hf legic rdmem 0 100 55    - reads 0x100 bytes with IV 0x55");
 	return 0;
 }
 int usage_legic_sim(void){
-	PrintAndLog("Missing help text.");
-	return 0;
-}
-int usage_legic_write(void){
-	PrintAndLog(" Write sample buffer to a legic tag. (use after load or read)");
-	PrintAndLog("Usage:  hf legic write [h] <offset> <length> <IV>");
+	PrintAndLog("Simulates a LEGIC Prime tag. MIM22, MIM256, MIM1024 types can be emulated");
+	PrintAndLog("Use eload/esave to upload a dump into emulator memory");
+	PrintAndLog("Usage:  hf legic sim [h] <tagtype> <phase> <frame> <reqresp>");
 	PrintAndLog("Options:");
-	PrintAndLog("  h             : this help");
-	PrintAndLog("  <offset>      : offset in data array to start writing from (hex)");
-	PrintAndLog("  <length>      : number of bytes to write (hex)");
-	PrintAndLog("  <IV>          : (optional) Initialization vector to use (ODD and 7bits)");
+	PrintAndLog("      h             : this help");
+	PrintAndLog("      <tagtype>     : 0 = MIM22");
+	PrintAndLog("                    : 1 = MIM256 (default)");
+	PrintAndLog("                    : 2 = MIM1024");	
+	PrintAndLog("      <phase>       : phase drift");
+	PrintAndLog("      <frame>       : frame drift");
+	PrintAndLog("      <reqresp>     : reqresp drift");
 	PrintAndLog("");
 	PrintAndLog("Samples:");
-	PrintAndLog("      hf legic write 10 4      - writes 0x4 to byte[0x10]");
+	PrintAndLog("      hf legic sim");
+	PrintAndLog("      hf legic sim ");
 	return 0;
 }
-int usage_legic_rawwrite(void){
-	PrintAndLog("Write raw data direct to a specific offset on legic tag.");
-	PrintAndLog("Usage:  hf legic writeraw [h] <offset> <value> <IV>");
+int usage_legic_write(void){
+	PrintAndLog("Write data to a LEGIC Prime tag. It autodetects tagsize to make sure size");
+	PrintAndLog("Usage:  hf legic write [h] o <offset> d <data (hex symbols)>");
 	PrintAndLog("Options:");
-	PrintAndLog("  h             : this help");
-	PrintAndLog("  <offset>      : offset to write to (hex)");
-	PrintAndLog("  <value>       : value (hex)");
-	PrintAndLog("  <IV>          : (optional) Initialization vector to use (hex, odd and 7bits)");
+	PrintAndLog("      h             : this help");
+	PrintAndLog("      o <offset>    : (hex) offset in data array to start writing");
+	//PrintAndLog("  <IV>          : (optional) Initialization vector to use (ODD and 7bits)");
+	PrintAndLog("      d <data>      : (hex symbols) bytes to write ");
 	PrintAndLog("");
 	PrintAndLog("Samples:");
-	PrintAndLog("      hf legic writeraw 10 4    - writes 0x4 to byte[0x10]");
-	return 0;
-}
-int usage_legic_fill(void){
-	PrintAndLog("Missing help text.");
+	PrintAndLog("      hf legic write o 10 d 11223344    - Write 0x11223344 starting from offset 0x10");
 	return 0;
 }
 int usage_legic_reader(void){
 	PrintAndLog("Read UID and type information from a legic tag.");
 	PrintAndLog("Usage:  hf legic reader [h]");
 	PrintAndLog("Options:");
-	PrintAndLog("  h             : this help");
+	PrintAndLog("      h             : this help");
 	PrintAndLog("");
 	PrintAndLog("Samples:");
 	PrintAndLog("      hf legic reader");
@@ -103,27 +89,76 @@ int usage_legic_info(void){
 	PrintAndLog("Shows systemarea, user areas etc");
 	PrintAndLog("Usage:  hf legic info [h]");
 	PrintAndLog("Options:");
-	PrintAndLog("  h             : this help");
+	PrintAndLog("      h             : this help");
 	PrintAndLog("");
 	PrintAndLog("Samples:");
 	PrintAndLog("      hf legic info");
 	return 0;
 }
 int usage_legic_dump(void){
-	PrintAndLog("Reads all pages from LEGIC MIM22, MIM256, MIM1024");
+	PrintAndLog("Reads all pages from LEGIC Prime MIM22, MIM256, MIM1024");
 	PrintAndLog("and saves binary dump into the file `filename.bin` or `cardUID.bin`");
 	PrintAndLog("It autodetects card type.\n");	
 	PrintAndLog("Usage:  hf legic dump [h] o <filename w/o .bin>");
 	PrintAndLog("Options:");
-	PrintAndLog("  h             : this help");
-	PrintAndLog("  n <FN>  : filename w/o .bin to save the dump as");	
+	PrintAndLog("      h             : this help");
+	PrintAndLog("      o <filename>  : filename w/o '.bin' to dump bytes");
 	PrintAndLog("");
 	PrintAndLog("Samples:");
 	PrintAndLog("      hf legic dump");
 	PrintAndLog("      hf legic dump o myfile");
 	return 0;
 }
-
+int usage_legic_restore(void){
+	PrintAndLog("Reads binary file and it autodetects card type and verifies that the file has the same size");
+	PrintAndLog("Then write the data back to card. All bytes except the first 7bytes [UID(4) MCC(1) DCF(2)]\n");
+	PrintAndLog("Usage:   hf legic restore [h] i <filename w/o .bin>");
+	PrintAndLog("Options:");
+	PrintAndLog("      h             : this help");
+	PrintAndLog("      i <filename>  : filename w/o '.bin' to restore bytes on to card from");
+	PrintAndLog("");
+	PrintAndLog("Samples:");
+	PrintAndLog("      hf legic restore i myfile");
+	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 2 myfile");
+	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 2 myfile");
+	return 0;
+}
+int usage_legic_wipe(void){
+	PrintAndLog("Fills a legic tag memory with zeros. From byte7 and to the end.");
+	PrintAndLog(" Usage:  hf legic wipe [h]");
+	PrintAndLog("Options:");
+	PrintAndLog("      h             : this help");
+	PrintAndLog("");
+	PrintAndLog("Samples:");	
+	PrintAndLog("      hf legic wipe");
+	return 0;
+}
 /*
  *  Output BigBuf and deobfuscate LEGIC RF tag data.
  *  This is based on information given in the talk held
@@ -166,6 +201,7 @@ 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];
@@ -179,7 +215,7 @@ int CmdLegicInfo(const char *Cmd) {
 			data[6]
 		);
 	
-	} else if(dcf > 60000) {		// Master token?
+	} else if (dcf > 60000) {		// Master token?
 
 		int fl = 0;
 
@@ -417,205 +453,78 @@ int CmdLegicInfo(const char *Cmd) {
 	return 0;
 }
 
+// params:
+// offset in data memory
+// number of bytes to read
 int CmdLegicRdmem(const char *Cmd) {
 
-	// params:
-	// offset in data memory
-	// number of bytes to read
 	char cmdp = param_getchar(Cmd, 0);
 	if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rdmem();
 	
 	uint32_t offset = 0, len = 0, IV = 1;
 	sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
 
-	// 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);
+	// tagtype
+	legic_card_select_t card;
+	if (legic_get_type(&card)) {
+		PrintAndLog("Failed to identify tagtype");
+		return 1;
 	}
-	
-	if ( (IV & 0x7F) != IV ){
-		IV &= 0x7F;
-		PrintAndLog("Truncating IV to 7bits");
+
+	legic_print_type(card.cardsize, 0);
+
+	// OUT-OF-BOUNDS check
+	// UID 4 bytes can't be written to.
+	if ( len + offset >= card.cardsize ) {
+		len = card.cardsize - offset;
+		PrintAndLog("Out-of-bounds, Cardsize = %d, Trunc offset+len = %d", card.cardsize, len + offset);
 	}
 	
-	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();
 	SendCommand(&c);
 	UsbCommand resp;
-	if (WaitForResponseTimeout(CMD_ACK, &resp, 3000)) {
-		uint8_t isOK = resp.arg[0] & 0xFF;
-		uint16_t readlen = resp.arg[1];
-		 if ( isOK ) {
-
-			uint8_t *data = malloc(readlen);
-			if ( !data ){
-				PrintAndLog("Cannot allocate memory");
-				return 2;
-			}
-			
-			if ( readlen != len )
-				PrintAndLog("Fail, only managed to read 0x%02X bytes", readlen);
-			
-			// copy data from device
-			GetEMLFromBigBuf(data, readlen, 0);
-			if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)){
-				PrintAndLog("Command execute timeout");
-				if ( data ) 
-					free(data);
-				return 1;
-			}
-	
-			PrintAndLog("\n ##  | Data");
-			PrintAndLog("-----+-----");
-			print_hex_break( data, readlen, 32);
-		 } else {
-			 PrintAndLog("failed reading tag");
-		 }
-	} else {
+	if ( !WaitForResponseTimeout(CMD_ACK, &resp, 3000) ) {
 		PrintAndLog("command execution time out");
 		return 1;
 	}
-	return 0;
-}
 
-int CmdLegicLoad(const char *Cmd) {
-
-// iceman: potential bug, where all filepaths or filename which starts with H or h will print the helptext :)	
-	char cmdp = param_getchar(Cmd, 0);
-	if ( cmdp == 'H' || cmdp == 'h' || cmdp == 0x00) return usage_legic_load();
-
-	char filename[FILE_PATH_SIZE] = {0x00};
-	int len = strlen(Cmd);
-	
-	if (len > FILE_PATH_SIZE) {
-		PrintAndLog("Filepath too long (was %s bytes), max allowed is %s ", len, FILE_PATH_SIZE);
-		return 0;
+	uint8_t isOK = resp.arg[0] & 0xFF;
+	uint16_t readlen = resp.arg[1];
+	if ( !isOK ) {
+		PrintAndLog("failed reading tag");
+		return 2;
 	}
-	memcpy(filename, Cmd, len);
-
-    FILE *f = fopen(filename, "r");
-    if(!f) {
-        PrintAndLog("couldn't open '%s'", Cmd);
-        return -1;
-    }
 	
-    char line[80]; 
-	int offset = 0; 
-	uint8_t data[USB_CMD_DATA_SIZE] = {0x00};
-	int index = 0;
-	int totalbytes = 0;
-    while ( fgets(line, sizeof(line), f) ) {
-        int res = sscanf(line, "%x %x %x %x %x %x %x %x", 
-            (unsigned int *)&data[index],
-			(unsigned int *)&data[index + 1],
-			(unsigned int *)&data[index + 2],
-			(unsigned int *)&data[index + 3],
-            (unsigned int *)&data[index + 4],
-			(unsigned int *)&data[index + 5],
-			(unsigned int *)&data[index + 6],
-			(unsigned int *)&data[index + 7]);
+	uint8_t *data = malloc(readlen);
+	if ( !data ){
+		PrintAndLog("Cannot allocate memory");
+		return 2;
+	}
 			
-        if(res != 8) {
-          PrintAndLog("Error: could not read samples");
-          fclose(f);
-          return -1;
-        }
-		index += res;
+	if ( readlen != len )
+		PrintAndLog("Fail, only managed to read 0x%02X bytes", readlen);
 			
-		if ( index == USB_CMD_DATA_SIZE ){
-//			PrintAndLog("sent %d | %d | %d", index, offset, totalbytes);
-			UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
-			memcpy(c.d.asBytes, data, sizeof(data));
-			clearCommandBuffer();
-			SendCommand(&c);
-			if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){
-				PrintAndLog("Command execute timeout");
-				fclose(f);
-				return 1;
-			}
-			offset += index;
-			totalbytes += index;
-			index = 0;
-		}
-    }
-    fclose(f);
-	
-	// left over bytes?
-	if ( index != 0 ) {
-		UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
-		memcpy(c.d.asBytes, data, 8);
-		clearCommandBuffer();
-		SendCommand(&c);
-		if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){
-				PrintAndLog("Command execute timeout");
-				return 1;
-		}
-		totalbytes += index;		
-	}
-	
-    PrintAndLog("loaded %u samples", totalbytes);
-    return 0;
-}
-
-int CmdLegicSave(const char *Cmd) {
-	int requested = 1024;
-	int offset = 0;
-	int delivered = 0;
-	char filename[FILE_PATH_SIZE] = {0x00};
-	uint8_t got[1024] = {0x00};
-
-	memset(filename, 0, FILE_PATH_SIZE);
-	
-	sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
-
-	/* If no length given save entire legic read buffer */
-	/* round up to nearest 8 bytes so the saved data can be used with legicload */
-	if (requested == 0)
-		requested = 1024;
-
-	if (requested % 8 != 0) {
-		int remainder = requested % 8;
-		requested = requested + 8 - remainder;
-	}
-
-	if (offset + requested > sizeof(got)) {
-		PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
-		return 0;
-	}
-
-	GetFromBigBuf(got, requested, offset);
-	if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
-		PrintAndLog("Command execute timeout");	
+	// copy data from device
+	GetEMLFromBigBuf(data, readlen, 0);
+	if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)){
+		PrintAndLog("Command execute timeout");
+		free(data);
 		return 1;
 	}
-
-	FILE *f = fopen(filename, "w");
-	if(!f) {
-		PrintAndLog("couldn't open '%s'", Cmd+1);
-		return -1;
-	}
 	
-	for (int j = 0; j < requested; j += 8) {
-		fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
-			got[j+0], got[j+1], got[j+2], got[j+3],
-			got[j+4], got[j+5],	got[j+6], got[j+7]
-		);
-		delivered += 8;
-		if (delivered >= requested) break;
-	}
-
-	fclose(f);
-	PrintAndLog("saved %u samples", delivered);
+	PrintAndLog("\n ##  |  0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F");
+	PrintAndLog("-----+------------------------------------------------------------------------------------------------");
+	print_hex_break( data, readlen, 32);
+	free(data);
 	return 0;
 }
 
-//TODO: write a help text (iceman)
+// should say which tagtype
+// should load a tag to device mem.
+// int phase, int frame, int reqresp
 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]);
@@ -626,157 +535,140 @@ 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();
-	
-	uint32_t offset = 0, len = 0, IV = 0;
+	uint8_t *data = NULL;
+	uint8_t cmdp = 0;
+	bool errors = false;
+	int len = 0, bg, en;
+	uint32_t offset = 0, IV = 0x55;
 	
-    int res = sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
-	if(res < 2) {
-		PrintAndLog("Please specify the offset and length as two hex strings and, optionally, the IV also as an hex string");
-        return -1;
-    }
+	while(param_getchar(Cmd, cmdp) != 0x00) {
+		switch(param_getchar(Cmd, cmdp)) {
+		case 'd':
+		case 'D':
+			// peek at length of the input string so we can
+			// figure out how many elements to malloc in "data"
+			bg=en=0;
+			if (param_getptr(Cmd, &bg, &en, cmdp+1)) {
+				errors = true;
+				break;
+			}
+			len = (en - bg + 1);
 
-	// 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");	
+			// check that user entered even number of characters
+			// for hex data string
+			if (len & 1) {
+				errors = true;
+				break;
+			}
+			
+			// limit number of bytes to write. This is not a 'restore' command.
+			if ( (len>>1) > 100 ){
+				PrintAndLog("Max bound on 100bytes to write a one time.");
+				PrintAndLog("Use the 'hf legic restore' command if you want to write the whole tag at once");
+				errors = true;
+			}
+
+			// it's possible for user to accidentally enter "b" parameter
+			// more than once - we have to clean previous malloc
+			if (data)
+				free(data);
+			
+			data = malloc(len >> 1);
+			if ( data == NULL ) {
+				PrintAndLog("Can't allocate memory. exiting");
+				errors = true;
+				break;
+			}
+			
+			if (param_gethex(Cmd, cmdp+1, data, len)) {
+				errors = true;
+				break;
+			}
+
+			len >>= 1;	
+			cmdp += 2;
+			break;
+		case 'o':
+		case 'O':
+			offset = param_get32ex(Cmd, cmdp+1, 4, 16);
+			cmdp += 2;
+			break;
+		case 'h':
+		case 'H':
+			errors = true;
+			break;
+		default:
+			PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+			errors = true;
+			break;
+		}
+		if (errors) break;
 	}
-	
-    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");
-		 }
-	} else {
-		PrintAndLog("command execution time out");
-		return 1;
+	//Validations
+	if (errors){
+		if (data) 
+			free(data);
+		return usage_legic_write();
 	}
-	
-    return 0;
-}
-
-int CmdLegicRfRawWrite(const char *Cmd) {
 
-	char cmdp = param_getchar(Cmd, 0);
-	if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rawwrite();
-	
-	uint32_t offset = 0, data = 0, IV = 0;	
-	char answer;
+	// tagtype
+	legic_card_select_t card;
+	if (legic_get_type(&card)) {
+		PrintAndLog("Failed to identify tagtype");
+		return -1;
+	}
 
-    int res = sscanf(Cmd, "%x %x %x", &offset, &data, &IV);
-	if(res < 2)
-		return usage_legic_rawwrite();
+	legic_print_type(card.cardsize, 0);
 	
-	// OUT-OF-BOUNDS check
-	if ( offset > MAX_LENGTH ) {
-		PrintAndLog("Out-of-bound, offset");
-		return 1;
+	// OUT-OF-BOUNDS checks
+	// UID 4+1 bytes can't be written to.
+	if ( offset < 5 ) {
+		PrintAndLog("Out-of-bounds, bytes 0-1-2-3-4 can't be written to. Offset = %d", offset);
+		return -2;
 	}
 	
-	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;
 	}
 
-	UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {offset, data, IV} };
-	
-	if (c.arg[0] == 0x05 || c.arg[0] == 0x06) {
-		PrintAndLog("############# DANGER !! #############");
+	if (offset == 5 || offset == 6) {
+		PrintAndLog("############# DANGER ################");
 		PrintAndLog("# changing the DCF is irreversible  #");
 		PrintAndLog("#####################################");
-		PrintAndLog("do youe really want to continue? y(es) n(o)");		
-		if (scanf(" %c", &answer) > 0 && (answer == 'y' || answer == 'Y')) {
-			SendCommand(&c);
+		char *answer = NULL;
+		answer = readline("do you really want to continue? y(es) n(o) : ");
+		bool overwrite = (answer[0] == 'y' || answer[0] == 'Y');
+		if (!overwrite){
+			PrintAndLog("command cancelled");
 			return 0;
 		}
-		return -1;
 	}
 	
-	clearCommandBuffer();
-    SendCommand(&c);
-	return 0;
-}
+	legic_chk_iv(&IV);
+	
+	PrintAndLog("Writing to tag");
 
-//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);
-	}
+	UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}};
+	memcpy(c.d.asBytes, data, len);	
+	UsbCommand resp;
 	clearCommandBuffer();
-    SendCommand(&cmd);
+	SendCommand(&c);
+	
+	if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
+		PrintAndLog("command execution time out");
+		return 1;
+	}
+	uint8_t isOK = resp.arg[0] & 0xFF;
+	if ( !isOK ) {
+		PrintAndLog("failed writing tag");
+		return 1;
+	}
+
     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);
-	crc_init(&crc, 4, 0x19 >> 1, 0x5, 0);
-
-	crc_clear(&crc);
-	crc_update(&crc, 1, 1); /* CMD_READ */
-	crc_update(&crc, cmd[0], 8);
-	crc_update(&crc, cmd[1], 8);
-	printf("crc4 %X\n", reflect(crc_finish(&crc), 4) ) ;
-
-	crc_clear(&crc);
-	crc_update(&crc, 1, 1); /* CMD_READ */
-	crc_update(&crc, cmd[0], 8);
-	crc_update(&crc, cmd[1], 8);
-	printf("crc4 %X\n",  crc_finish(&crc) ) ;
-
-	printf("---- old ---\n");
-	crc_update2(&crc, 1, 1); /* CMD_READ */
-	crc_update2(&crc, cmd[0], 8);
-	crc_update2(&crc, cmd[1], 8);
-	printf("crc4 %X \n", reflect(crc_finish(&crc), 4) ) ;
+}
 
-	
-	crc_clear(&crc);
-	crc_update2(&crc, 1, 1); /* CMD_READ */
-	crc_update2(&crc, cmd[0], 8);
-	crc_update2(&crc, cmd[1], 8);
-	printf("crc4 %X\n",  crc_finish(&crc) ) ;
-}	
- 
-int CmdLegicCalcCrc8(const char *Cmd){
+int CmdLegicCalcCrc(const char *Cmd){
 
 	uint8_t *data = NULL;
 	uint8_t cmdp = 0, uidcrc = 0, type=0;
@@ -846,16 +738,13 @@ int CmdLegicCalcCrc8(const char *Cmd){
 	//Validations
 	if (errors){
 		if (data) free(data);
-		return usage_legic_calccrc8();
+		return usage_legic_calccrc();
 	}
 	
 	switch (type){
 		case 16:
 			PrintAndLog("Legic crc16: %X", CRC16Legic(data, len, uidcrc));
 			break;
-		case 4:
-			calc4(data, 0);
-			break;
 		default:
 			PrintAndLog("Legic crc8: %X",  CRC8Legic(data, len) );
 			break;
@@ -898,6 +787,30 @@ 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+i, len); 
+		clearCommandBuffer();
+		SendCommand(&c);
+	}
+}
 
 int HFLegicReader(const char *Cmd, bool verbose) {
 
@@ -925,7 +838,7 @@ 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 +846,26 @@ 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;
 	}
@@ -986,10 +901,11 @@ 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;
 	}
+	memset(data, 0, readlen);
 	
 	if ( readlen != dumplen )
 		PrintAndLog("Fail, only managed to read 0x%02X bytes of 0x%02X", readlen, dumplen);
@@ -998,7 +914,7 @@ 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;
 	}
 
@@ -1008,32 +924,344 @@ int CmdLegicDump(const char *Cmd){
 	else
 		sprintf(fnameptr + fileNlen,".bin");
 
-	if ((fout = fopen(filename,"wb")) == NULL) { 
+	f = fopen(filename,"wb");
+	if (!f) { 
 		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 CmdLegicRestore(const char *Cmd){
+
+	FILE *f;
+	char filename[FILE_PATH_SIZE] = {0x00};
+	char *fnameptr = filename;
+	size_t fileNlen = 0;
+	bool errors = true;
+	uint16_t numofbytes;	
+	uint8_t cmdp = 0;
+	
+	memset(filename, 0, sizeof(filename));
+	
+	while(param_getchar(Cmd, cmdp) != 0x00) {
+		switch(param_getchar(Cmd, cmdp)) {
+			case 'h':
+			case 'H':
+				errors = true;
+				break;
+			case 'i':
+			case 'I':
+				fileNlen = param_getstr(Cmd, cmdp+1, filename);
+				if (!fileNlen) 
+					errors = true;
+				else 
+					errors = false;
+				
+				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;
+	}
+
+	//Validations
+	if(errors) return usage_legic_restore();
+	
+	// tagtype
+	legic_card_select_t card;
+	if (legic_get_type(&card)) {
+		PrintAndLog("Failed to identify tagtype");
+		return 1;
+	}
+	numofbytes = card.cardsize;	
+	
+	// set up buffer
+	uint8_t *data = malloc(numofbytes);
+	if (!data) {
+		PrintAndLog("Fail, cannot allocate memory");
+		return 2;		
+	}
+	memset(data, 0, numofbytes);
+	
+	legic_print_type(numofbytes, 0);	
+
+	// set up file
+	fnameptr += fileNlen;
+	sprintf(fnameptr, ".bin");
+
+	f = fopen(filename,"rb");
+	if (!f) {
+		PrintAndLog("File %s not found or locked", filename);
+		return 3;
+	}	
+	
+	// verify size of dumpfile is the same as card.	
+	fseek(f, 0, SEEK_END); // seek to end of file
+	size_t filesize = ftell(f); // get current file pointer
+	fseek(f, 0, SEEK_SET); // seek back to beginning of file
+	
+	if ( filesize != numofbytes) {
+		PrintAndLog("Fail, filesize and cardsize is not equal. [%u != %u]", filesize, numofbytes);
+		free(data);
+		fclose(f);
+		return 4;
+	}
+
+	// load file
+	size_t bytes_read = fread(data, 1, numofbytes, f);
+	fclose(f);
+	
+	if ( bytes_read == 0){
+		PrintAndLog("File reading error");
+		free(data);
+		return 2;
+	}
 	
+	PrintAndLog("Restoring to card");
+
+	// transfer to device
+	size_t len = 0;
+	UsbCommand c = {CMD_WRITER_LEGIC_RF, {0, 0, 0x55}};
+	UsbCommand resp;
+	for(size_t i = 7; 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, data+i, len); 
+		clearCommandBuffer();
+		SendCommand(&c);
+	
+		if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+			PrintAndLog("command execution time out");
+			free(data);	
+			return 1;
+		}
+		uint8_t isOK = resp.arg[0] & 0xFF;
+		if ( !isOK ) {
+			PrintAndLog("failed writing tag [msg = %u]", resp.arg[1] & 0xFF);
+			free(data);	
+			return 1;
+		}
+		PrintAndLog("Wrote chunk [offset %d | len %d | total %d", i, len, i+len);
+	}	
+	
+	free(data);	
+	PrintAndLog("\nWrote %d bytes to card from file %s", numofbytes, 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
+	f = fopen(filename,"rb");
+	if (!f) { 
+		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);
+		f = NULL;		
+		return 2;
+	}
+	fclose(f);
+	f = NULL;
+	
+	// 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
+	f = fopen(filename,"wb");
+	if (!f) { 
+		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;
+}
+
+int CmdLegicWipe(const char *Cmd){
+
+	char cmdp = param_getchar(Cmd, 0);
+	
+	if ( cmdp == 'h' || cmdp == 'H') return usage_legic_wipe();
+	
+	// tagtype
+	legic_card_select_t card;
+	if (legic_get_type(&card)) {
+		PrintAndLog("Failed to identify tagtype");
+		return 1;
+	}
+	
+	// set up buffer
+	uint8_t *data = malloc(card.cardsize);
+	if (!data) {
+		PrintAndLog("Fail, cannot allocate memory");
+		return 2;		
+	}
+	memset(data, 0, card.cardsize);
+	
+	legic_print_type(card.cardsize, 0);
+
+	printf("Erasing");
+	
+	// transfer to device
+	size_t len = 0;
+	UsbCommand c = {CMD_WRITER_LEGIC_RF, {0, 0, 0x55}};
+	UsbCommand resp;
+	for(size_t i = 7; i < card.cardsize; i += USB_CMD_DATA_SIZE) {
+		
+		printf(".");
+		len = MIN((card.cardsize - i), USB_CMD_DATA_SIZE);		
+		c.arg[0] = i; // offset
+		c.arg[1] = len; // number of bytes
+		memcpy(c.d.asBytes, data+i, len); 
+		clearCommandBuffer();
+		SendCommand(&c);
+	
+		if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+			PrintAndLog("command execution time out");
+			free(data);	
+			return 3;
+		}
+		uint8_t isOK = resp.arg[0] & 0xFF;
+		if ( !isOK ) {
+			PrintAndLog("failed writing tag [msg = %u]", resp.arg[1] & 0xFF);
+			free(data);	
+			return 4;
+		}
+	}
+	printf("ok\n");
+	return 0;
+}
+
+int CmdLegicList(const char *Cmd) {
+	CmdHFList("legic");
+	return 0;
+}
+
 static command_t CommandTable[] =  {
 	{"help",	CmdHelp,			1, "This help"},
-	{"reader",	CmdLegicReader,		1, "LEGIC Prime Reader UID and Type tag info"},
+	{"reader",	CmdLegicReader,		1, "LEGIC Prime Reader UID and tag info"},
 	{"info",	CmdLegicInfo,		0, "Display deobfuscated and decoded LEGIC Prime tag data"},
-	{"dump",	CmdLegicDump,		0, "Dump LEGIC Prime card to binary file"},
-	{"rdmem",	CmdLegicRdmem,		0, "[offset][length] <iv> -- read bytes from a LEGIC card"},
-	{"save",	CmdLegicSave,		0, "<filename> [<length>] -- Store samples"},
-	{"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"},
+	{"dump",	CmdLegicDump,		0, "Dump LEGIC Prime tag to binary file"},
+	{"restore", CmdLegicRestore,	0, "Restore a dump onto a LEGIC Prime tag"},
+	{"rdmem",	CmdLegicRdmem,		0, "Read bytes from a LEGIC Prime tag"},
+	{"sim",		CmdLegicRfSim,		0, "Start tag simulator"},
+	{"write",	CmdLegicRfWrite,	0, "Write data to a LEGIC Prime tag"},
+	{"crc",		CmdLegicCalcCrc,	1, "Calculate Legic CRC over given bytes"},	
+	{"eload",	CmdLegicELoad,		1, "Load binary dump to emulator memory"},
+	{"esave",	CmdLegicESave,		1, "Save emulator memory to binary file"},
+	{"list",	CmdLegicList,		1, "[Deprecated] List LEGIC history"},
+	{"wipe",	CmdLegicWipe,		1, "Wipe a LEGIC Prime tag"},
 	{NULL, NULL, 0, NULL}
 };