[proxmark3-svn] / client / cmdhflegic.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// High frequency Legic commands
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <string.h>
#include "proxmark3.h"
#include "data.h"
#include "ui.h"
#include "cmdparser.h"
#include "cmdhflegic.h"
#include "cmdmain.h"
#include "util.h"
#include "crc.h"
static int CmdHelp(const char *Cmd);

int usage_legic_calccrc8(void){
	PrintAndLog("Calculates the legic crc8 on the input hexbytes.");
	PrintAndLog("There must be an even number of hexsymbols as input.");
	PrintAndLog("Usage:  hf legic crc8 <hexbytes>");
	PrintAndLog("Options :");
	PrintAndLog("  <hexbytes>   : hex bytes in a string");
	PrintAndLog("");
	PrintAndLog("Sample  : hf legic crc8 deadbeef1122");
	return 0;
}

int usage_legic_load(void){
	PrintAndLog("It loads datasamples from the file `filename` to device memory");
	PrintAndLog("Usage:  hf legic load <file name>");
	PrintAndLog(" sample: hf legic load filename");
	return 0;
}

/*
 *  Output BigBuf and deobfuscate LEGIC RF tag data.
 *   This is based on information given in the talk held
 *  by Henryk Ploetz and Karsten Nohl at 26c3
 */
int CmdLegicDecode(const char *Cmd) {
	// Index for the bytearray.
	int i = 0;
	int k = 0, segmentNum;
	int segment_len = 0;
	int segment_flag = 0;
	uint8_t stamp_len = 0;
	int crc = 0;
	int wrp = 0;
	int wrc = 0;
	uint8_t data_buf[1200]; // receiver buffer,  should be 1024..
	char token_type[4];

	// copy data from proxmark into buffer
	GetFromBigBuf(data_buf,sizeof(data_buf),0);
	WaitForResponse(CMD_ACK,NULL);

	// Output CDF System area (9 bytes) plus remaining header area (12 bytes)
	crc = data_buf[4];
	uint32_t calc_crc =  CRC8Legic(data_buf, 4);	
	
	PrintAndLog("\nCDF: System Area");

	PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s",
		data_buf[0],
		data_buf[1],
		data_buf[2],
		data_buf[3],
		data_buf[4],
		(calc_crc == crc) ? "OK":"Fail" 
	);
 
	switch (data_buf[5] & 0x7f) {
		case 0x00 ... 0x2f:
			strncpy(token_type, "IAM",sizeof(token_type));
			break;
		case 0x30 ... 0x6f:
			strncpy(token_type, "SAM",sizeof(token_type));
			break;
		case 0x70 ... 0x7f:
			strncpy(token_type, "GAM",sizeof(token_type));
			break;
		default:
			strncpy(token_type, "???",sizeof(token_type));
			break;
	}

	stamp_len = 0xfc - data_buf[6];

	PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
		data_buf[5],
		data_buf[6],
		token_type,
		(data_buf[5]&0x80)>>7,
		stamp_len
	);

	PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
		data_buf[7]&0x0f,
		(data_buf[7]&0x70)>>4,
		(data_buf[7]&0x80)>>7,
		data_buf[7],
		data_buf[8]
	);

	PrintAndLog("Remaining Header Area");
	PrintAndLog("%s", sprint_hex(data_buf+9, 13));
	
	uint8_t segCrcBytes[8] = {0x00};
	uint32_t segCalcCRC = 0;
	uint32_t segCRC = 0;

	PrintAndLog("\nADF: User Area");
	i = 22;  
	// 64 potential segements
	for ( segmentNum=0; segmentNum<64; segmentNum++ ) {
		segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc);
		segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4;

		wrp = (data_buf[i+2]^crc);
		wrc = ((data_buf[i+3]^crc)&0x70)>>4;

		bool hasWRC = (wrc > 0);
		bool hasWRP = (wrp > wrc);
		int wrp_len = (wrp - wrc);
		int remain_seg_payload_len = (segment_len - wrp - 5);
		
		// validate segment-crc
		segCrcBytes[0]=data_buf[0];			//uid0
		segCrcBytes[1]=data_buf[1];			//uid1
		segCrcBytes[2]=data_buf[2];			//uid2
		segCrcBytes[3]=data_buf[3];			//uid3
		segCrcBytes[4]=(data_buf[i]^crc); 	//hdr0
		segCrcBytes[5]=(data_buf[i+1]^crc); //hdr1
		segCrcBytes[6]=(data_buf[i+2]^crc); //hdr2
		segCrcBytes[7]=(data_buf[i+3]^crc); //hdr3

		segCalcCRC = CRC8Legic(segCrcBytes, 8);
		segCRC = data_buf[i+4]^crc;

		PrintAndLog("Segment %02u: raw header=%02x %02x %02x %02x, flag=%01x (valid=%01u, last=%01u), len=%04u, WRP=%02u, WRC=%02u, RD=%01u, CRC=%02x  (%s)",
			segmentNum,
			data_buf[i]^crc,
			data_buf[i+1]^crc,
			data_buf[i+2]^crc,
			data_buf[i+3]^crc,
			segment_flag,
			(segment_flag & 0x4) >> 2,
			(segment_flag & 0x8) >> 3,
			segment_len,
			wrp,
			wrc,
			((data_buf[i+3]^crc) & 0x80) >> 7,
			segCRC,
			( segCRC == segCalcCRC ) ? "OK" : "fail"
		);

		i += 5;
    
		if ( hasWRC ) {
			PrintAndLog("WRC protected area:   (I %d | K %d| WRC %d)", i, k, wrc);
			
			for ( k=i; k < wrc; k++)
				data_buf[k] ^= crc;
			
			//is WRC / 8? 
			
			// for ( k=i; k < wrc; k += 8)
			PrintAndLog("%s", sprint_hex( data_buf+i, wrc ) );
			
			i += wrc;
		}
    
		if ( hasWRP ) {
			PrintAndLog("Remaining write protected area:  (I %d | K %d | WRC %d | WRP %d  WRP_LEN %d)",i, k, wrc, wrp, wrp_len);

			// // de-xor?
			// if ( data_buf[k] > 0) {
				// for (k=i; k < wrp_len; k++)
					// data_buf[k] ^= crc;
			// }
			
			// for (k=i; k < wrp_len; k += 16) {
				
			PrintAndLog("%s", sprint_hex( data_buf+i, wrp_len));
			// }
			
			i += wrp_len;
			
			// if( wrp_len == 8 )
				// PrintAndLog("Card ID: %2X%02X%02X", data_buf[i-4]^crc, data_buf[i-3]^crc, data_buf[i-2]^crc);			
		}
    
		PrintAndLog("Remaining segment payload:");
		
		// if ( data_buf[k] > 0 ) {
			// for ( k=i; k < remain_seg_payload_len; k++)
				// data_buf[k] ^= crc;
		// }
		
		// for ( k=i; k < remain_seg_payload_len; k++)
		PrintAndLog("%s", sprint_hex( data_buf+i, remain_seg_payload_len )  );
    
		i += remain_seg_payload_len;
		
		// end with last segment
		if (segment_flag & 0x8) return 0;

	} // end for loop
	return 0;
}

int CmdLegicRFRead(const char *Cmd) {
	int byte_count=0, offset=0;
	sscanf(Cmd, "%i %i", &offset, &byte_count);
	if(byte_count == 0) byte_count = -1;
	if(byte_count + offset > 1024) byte_count = 1024 - offset;

	UsbCommand c= {CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
	clearCommandBuffer();
	SendCommand(&c);
	return 0;
}

int CmdLegicLoad(const char *Cmd) {
	
	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;
	}
	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]);
			
        if(res != 8) {
          PrintAndLog("Error: could not read samples");
          fclose(f);
          return -1;
        }
		index += res;
			
		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];
	uint8_t got[1024] = {0x00};

	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;
	}

	FILE *f = fopen(filename, "w");
	if(!f) {
		PrintAndLog("couldn't open '%s'", Cmd+1);
		return -1;
	}

	GetFromBigBuf(got, requested, offset);
	WaitForResponse(CMD_ACK, NULL);

	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);
	return 0;
}

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]);
	clearCommandBuffer();
	SendCommand(&c);
	return 0;
}

int CmdLegicRfWrite(const char *Cmd) {
    UsbCommand c = {CMD_WRITER_LEGIC_RF};
    int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]);
	if(res != 2) {
		PrintAndLog("Please specify the offset and length as two hex strings");
        return -1;
    }
	clearCommandBuffer();
    SendCommand(&c);
    return 0;
}

int CmdLegicRfFill(const char *Cmd) {
    UsbCommand cmd = {CMD_WRITER_LEGIC_RF};
    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}};
    for(i = 0; i < 48; i++) {
		c.d.asBytes[i] = cmd.arg[2];
    }
	
	for(i = 0; i < 22; i++) {
		c.arg[0] = i*48;
		SendCommand(&c);
		WaitForResponse(CMD_ACK,NULL);
	}
	clearCommandBuffer();
    SendCommand(&cmd);
    return 0;
 }

int CmdLegicCalcCrc8(const char *Cmd){

	int len =  strlen(Cmd);	
	if (len & 1 ) return usage_legic_calccrc8(); 
	
	uint8_t *data = malloc(len);
	if ( data == NULL ) return 1;
		
	param_gethex(Cmd, 0, data, len );
	
	uint32_t checksum =  CRC8Legic(data, len/2);	
	PrintAndLog("Bytes: %s || CRC8: %X", sprint_hex(data, len/2), checksum );
	free(data);
	return 0;
} 
 
static command_t CommandTable[] =  {
	{"help",	CmdHelp,        1, "This help"},
	{"decode",	CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
	{"read",	CmdLegicRFRead, 0, "[offset][length] -- 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> -- Write sample buffer (user after load or read)"},
	{"fill",	CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
	{"crc8",	CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"},
	{NULL, NULL, 0, NULL}
};

int CmdHFLegic(const char *Cmd) {
	clearCommandBuffer();
	CmdsParse(CommandTable, Cmd);
	return 0;
}

int CmdHelp(const char *Cmd) {
	CmdsHelp(CommandTable);
	return 0;
}
Commit	Line	Data
a553f267	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
	3	//
	4	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	5	// at your option, any later version. See the LICENSE.txt file for the text of
	6	// the license.
	7	//-----------------------------------------------------------------------------
	8	// High frequency Legic commands
	9	//-----------------------------------------------------------------------------
	10
8e220a91	11	#include <stdio.h>
8e220a91	12	#include <string.h>
902cb3c0	13	#include "proxmark3.h"
41dab153	14	#include "data.h"
41dab153	15	#include "ui.h"
7fe9b0b7	16	#include "cmdparser.h"
7fe9b0b7	17	#include "cmdhflegic.h"
669c1b80	18	#include "cmdmain.h"
31d1caa5	19	#include "util.h"
3b920280	20	#include "crc.h"
7fe9b0b7	21	static int CmdHelp(const char *Cmd);
7fe9b0b7	22
3b920280	23	int usage_legic_calccrc8(void){
	24	PrintAndLog("Calculates the legic crc8 on the input hexbytes.");
	25	PrintAndLog("There must be an even number of hexsymbols as input.");
	26	PrintAndLog("Usage: hf legic crc8 <hexbytes>");
	27	PrintAndLog("Options :");
	28	PrintAndLog(" <hexbytes> : hex bytes in a string");
	29	PrintAndLog("");
	30	PrintAndLog("Sample : hf legic crc8 deadbeef1122");
	31	return 0;
	32	}
	33
e579e768	34	int usage_legic_load(void){
	35	PrintAndLog("It loads datasamples from the file `filename` to device memory");
	36	PrintAndLog("Usage: hf legic load <file name>");
	37	PrintAndLog(" sample: hf legic load filename");
	38	return 0;
	39	}
	40
669c1b80	41	/*
	42	* Output BigBuf and deobfuscate LEGIC RF tag data.
	43	* This is based on information given in the talk held
	44	* by Henryk Ploetz and Karsten Nohl at 26c3
669c1b80	45	*/
3b920280	46	int CmdLegicDecode(const char *Cmd) {
d7fd9084	47	// Index for the bytearray.
	48	int i = 0;
	49	int k = 0, segmentNum;
52cf34c1	50	int segment_len = 0;
52cf34c1	51	int segment_flag = 0;
60bb5ef7	52	uint8_t stamp_len = 0;
52cf34c1	53	int crc = 0;
	54	int wrp = 0;
	55	int wrc = 0;
d7fd9084	56	uint8_t data_buf[1200]; // receiver buffer, should be 1024..
52cf34c1	57	char token_type[4];
	58
	59	// copy data from proxmark into buffer
	60	GetFromBigBuf(data_buf,sizeof(data_buf),0);
	61	WaitForResponse(CMD_ACK,NULL);
	62
	63	// Output CDF System area (9 bytes) plus remaining header area (12 bytes)
3b920280	64	crc = data_buf[4];
	65	uint32_t calc_crc = CRC8Legic(data_buf, 4);
	66
52cf34c1	67	PrintAndLog("\nCDF: System Area");
52cf34c1	68
3b920280	69	PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s",
52cf34c1	70	data_buf[0],
	71	data_buf[1],
	72	data_buf[2],
	73	data_buf[3],
3b920280	74	data_buf[4],
e579e768	75	(calc_crc == crc) ? "OK":"Fail"
52cf34c1	76	);
669c1b80	77
d7fd9084	78	switch (data_buf[5] & 0x7f) {
52cf34c1	79	case 0x00 ... 0x2f:
	80	strncpy(token_type, "IAM",sizeof(token_type));
	81	break;
	82	case 0x30 ... 0x6f:
d7fd9084	83	strncpy(token_type, "SAM",sizeof(token_type));
52cf34c1	84	break;
52cf34c1	85	case 0x70 ... 0x7f:
d7fd9084	86	strncpy(token_type, "GAM",sizeof(token_type));
52cf34c1	87	break;
52cf34c1	88	default:
d7fd9084	89	strncpy(token_type, "???",sizeof(token_type));
52cf34c1	90	break;
	91	}
	92
	93	stamp_len = 0xfc - data_buf[6];
	94
	95	PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
	96	data_buf[5],
	97	data_buf[6],
	98	token_type,
	99	(data_buf[5]&0x80)>>7,
	100	stamp_len
	101	);
	102
	103	PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
	104	data_buf[7]&0x0f,
	105	(data_buf[7]&0x70)>>4,
	106	(data_buf[7]&0x80)>>7,
	107	data_buf[7],
	108	data_buf[8]
	109	);
	110
	111	PrintAndLog("Remaining Header Area");
	112	PrintAndLog("%s", sprint_hex(data_buf+9, 13));
d7fd9084	113
e579e768	114	uint8_t segCrcBytes[8] = {0x00};
	115	uint32_t segCalcCRC = 0;
	116	uint32_t segCRC = 0;
d7fd9084	117
	118	PrintAndLog("\nADF: User Area");
	119	i = 22;
	120	// 64 potential segements
	121	for ( segmentNum=0; segmentNum<64; segmentNum++ ) {
52cf34c1	122	segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc);
	123	segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4;
	124
	125	wrp = (data_buf[i+2]^crc);
	126	wrc = ((data_buf[i+3]^crc)&0x70)>>4;
	127
d7fd9084	128	bool hasWRC = (wrc > 0);
	129	bool hasWRP = (wrp > wrc);
	130	int wrp_len = (wrp - wrc);
	131	int remain_seg_payload_len = (segment_len - wrp - 5);
e579e768	132
d7fd9084	133	// validate segment-crc
	134	segCrcBytes[0]=data_buf[0]; //uid0
	135	segCrcBytes[1]=data_buf[1]; //uid1
	136	segCrcBytes[2]=data_buf[2]; //uid2
	137	segCrcBytes[3]=data_buf[3]; //uid3
	138	segCrcBytes[4]=(data_buf[i]^crc); //hdr0
e579e768	139	segCrcBytes[5]=(data_buf[i+1]^crc); //hdr1
	140	segCrcBytes[6]=(data_buf[i+2]^crc); //hdr2
	141	segCrcBytes[7]=(data_buf[i+3]^crc); //hdr3
d7fd9084	142
e579e768	143	segCalcCRC = CRC8Legic(segCrcBytes, 8);
d7fd9084	144	segCRC = data_buf[i+4]^crc;
e579e768	145
e579e768	146	PrintAndLog("Segment %02u: raw header=%02x %02x %02x %02x, flag=%01x (valid=%01u, last=%01u), len=%04u, WRP=%02u, WRC=%02u, RD=%01u, CRC=%02x (%s)",
d7fd9084	147	segmentNum,
52cf34c1	148	data_buf[i]^crc,
	149	data_buf[i+1]^crc,
	150	data_buf[i+2]^crc,
	151	data_buf[i+3]^crc,
	152	segment_flag,
d7fd9084	153	(segment_flag & 0x4) >> 2,
d7fd9084	154	(segment_flag & 0x8) >> 3,
52cf34c1	155	segment_len,
	156	wrp,
	157	wrc,
d7fd9084	158	((data_buf[i+3]^crc) & 0x80) >> 7,
e579e768	159	segCRC,
e579e768	160	( segCRC == segCalcCRC ) ? "OK" : "fail"
52cf34c1	161	);
52cf34c1	162
3b920280	163	i += 5;
669c1b80	164
d7fd9084	165	if ( hasWRC ) {
d7fd9084	166	PrintAndLog("WRC protected area: (I %d \| K %d\| WRC %d)", i, k, wrc);
3b920280	167
	168	for ( k=i; k < wrc; k++)
	169	data_buf[k] ^= crc;
	170
d7fd9084	171	//is WRC / 8?
	172
	173	// for ( k=i; k < wrc; k += 8)
	174	PrintAndLog("%s", sprint_hex( data_buf+i, wrc ) );
3b920280	175
3b920280	176	i += wrc;
52cf34c1	177	}
669c1b80	178
d7fd9084	179	if ( hasWRP ) {
	180	PrintAndLog("Remaining write protected area: (I %d \| K %d \| WRC %d \| WRP %d WRP_LEN %d)",i, k, wrc, wrp, wrp_len);
	181
	182	// // de-xor?
	183	// if ( data_buf[k] > 0) {
	184	// for (k=i; k < wrp_len; k++)
	185	// data_buf[k] ^= crc;
	186	// }
3b920280	187
d7fd9084	188	// for (k=i; k < wrp_len; k += 16) {
	189
	190	PrintAndLog("%s", sprint_hex( data_buf+i, wrp_len));
	191	// }
3b920280	192
d7fd9084	193	i += wrp_len;
	194
	195	// if( wrp_len == 8 )
	196	// PrintAndLog("Card ID: %2X%02X%02X", data_buf[i-4]^crc, data_buf[i-3]^crc, data_buf[i-2]^crc);
52cf34c1	197	}
669c1b80	198
52cf34c1	199	PrintAndLog("Remaining segment payload:");
3b920280	200
d7fd9084	201	// if ( data_buf[k] > 0 ) {
	202	// for ( k=i; k < remain_seg_payload_len; k++)
	203	// data_buf[k] ^= crc;
	204	// }
3b920280	205
d7fd9084	206	// for ( k=i; k < remain_seg_payload_len; k++)
d7fd9084	207	PrintAndLog("%s", sprint_hex( data_buf+i, remain_seg_payload_len ) );
669c1b80	208
d7fd9084	209	i += remain_seg_payload_len;
d7fd9084	210
52cf34c1	211	// end with last segment
	212	if (segment_flag & 0x8) return 0;
	213
	214	} // end for loop
	215	return 0;
669c1b80	216	}
41dab153	217
52cf34c1	218	int CmdLegicRFRead(const char *Cmd) {
	219	int byte_count=0, offset=0;
	220	sscanf(Cmd, "%i %i", &offset, &byte_count);
	221	if(byte_count == 0) byte_count = -1;
	222	if(byte_count + offset > 1024) byte_count = 1024 - offset;
	223
	224	UsbCommand c= {CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
	225	clearCommandBuffer();
	226	SendCommand(&c);
	227	return 0;
41dab153	228	}
3612a8a8	229
52cf34c1	230	int CmdLegicLoad(const char *Cmd) {
b915fda3	231
52cf34c1	232	char cmdp = param_getchar(Cmd, 0);
e579e768	233	if ( cmdp == 'H' \|\| cmdp == 'h' \|\| cmdp == 0x00) return usage_legic_load();
b915fda3	234
e579e768	235	char filename[FILE_PATH_SIZE] = {0x00};
	236	int len = strlen(Cmd);
	237
b915fda3	238	if (len > FILE_PATH_SIZE) {
	239	PrintAndLog("Filepath too long (was %s bytes), max allowed is %s ", len, FILE_PATH_SIZE);
	240	return 0;
	241	}
	242	memcpy(filename, Cmd, len);
	243
	244	FILE *f = fopen(filename, "r");
3612a8a8	245	if(!f) {
	246	PrintAndLog("couldn't open '%s'", Cmd);
	247	return -1;
	248	}
52cf34c1	249
52cf34c1	250	char line[80];
810f5379	251	int offset = 0;
c6e0a2eb	252	uint8_t data[USB_CMD_DATA_SIZE] = {0x00};
	253	int index = 0;
	254	int totalbytes = 0;
52cf34c1	255	while ( fgets(line, sizeof(line), f) ) {
3612a8a8	256	int res = sscanf(line, "%x %x %x %x %x %x %x %x",
c6e0a2eb	257	(unsigned int *)&data[index],
	258	(unsigned int *)&data[index + 1],
	259	(unsigned int *)&data[index + 2],
	260	(unsigned int *)&data[index + 3],
	261	(unsigned int *)&data[index + 4],
	262	(unsigned int *)&data[index + 5],
	263	(unsigned int *)&data[index + 6],
	264	(unsigned int *)&data[index + 7]);
e7d099dc	265
3612a8a8	266	if(res != 8) {
	267	PrintAndLog("Error: could not read samples");
	268	fclose(f);
	269	return -1;
	270	}
c6e0a2eb	271	index += res;
	272
	273	if ( index == USB_CMD_DATA_SIZE ){
	274	// PrintAndLog("sent %d \| %d \| %d", index, offset, totalbytes);
	275	UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
	276	memcpy(c.d.asBytes, data, sizeof(data));
	277	clearCommandBuffer();
	278	SendCommand(&c);
d7fd9084	279	if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){
	280	PrintAndLog("Command execute timeout");
	281	fclose(f);
	282	return 1;
	283	}
c6e0a2eb	284	offset += index;
	285	totalbytes += index;
	286	index = 0;
	287	}
3612a8a8	288	}
3612a8a8	289	fclose(f);
c6e0a2eb	290
	291	// left over bytes?
	292	if ( index != 0 ) {
	293	UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
	294	memcpy(c.d.asBytes, data, 8);
	295	clearCommandBuffer();
	296	SendCommand(&c);
d7fd9084	297	if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){
	298	PrintAndLog("Command execute timeout");
	299	return 1;
	300	}
c6e0a2eb	301	totalbytes += index;
	302	}
	303
	304	PrintAndLog("loaded %u samples", totalbytes);
3612a8a8	305	return 0;
	306	}
	307
52cf34c1	308	int CmdLegicSave(const char *Cmd) {
	309	int requested = 1024;
	310	int offset = 0;
	311	int delivered = 0;
	312	char filename[FILE_PATH_SIZE];
	313	uint8_t got[1024] = {0x00};
	314
	315	sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
	316
	317	/* If no length given save entire legic read buffer */
	318	/* round up to nearest 8 bytes so the saved data can be used with legicload */
e7d099dc	319	if (requested == 0)
52cf34c1	320	requested = 1024;
52cf34c1	321
	322	if (requested % 8 != 0) {
	323	int remainder = requested % 8;
	324	requested = requested + 8 - remainder;
	325	}
	326
	327	if (offset + requested > sizeof(got)) {
	328	PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
	329	return 0;
	330	}
	331
	332	FILE *f = fopen(filename, "w");
	333	if(!f) {
	334	PrintAndLog("couldn't open '%s'", Cmd+1);
	335	return -1;
	336	}
	337
d7fd9084	338	GetFromBigBuf(got, requested, offset);
d7fd9084	339	WaitForResponse(CMD_ACK, NULL);
52cf34c1	340
	341	for (int j = 0; j < requested; j += 8) {
	342	fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
c6e0a2eb	343	got[j+0], got[j+1], got[j+2], got[j+3],
c6e0a2eb	344	got[j+4], got[j+5], got[j+6], got[j+7]
52cf34c1	345	);
	346	delivered += 8;
	347	if (delivered >= requested) break;
	348	}
	349
	350	fclose(f);
	351	PrintAndLog("saved %u samples", delivered);
	352	return 0;
3612a8a8	353	}
3612a8a8	354
52cf34c1	355	int CmdLegicRfSim(const char *Cmd) {
3b920280	356	UsbCommand c = {CMD_SIMULATE_TAG_LEGIC_RF, {6,3,0}};
52cf34c1	357	sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]);
	358	clearCommandBuffer();
	359	SendCommand(&c);
	360	return 0;
3612a8a8	361	}
3612a8a8	362
52cf34c1	363	int CmdLegicRfWrite(const char *Cmd) {
52cf34c1	364	UsbCommand c = {CMD_WRITER_LEGIC_RF};
125a98a1	365	int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]);
3612a8a8	366	if(res != 2) {
	367	PrintAndLog("Please specify the offset and length as two hex strings");
	368	return -1;
	369	}
52cf34c1	370	clearCommandBuffer();
3612a8a8	371	SendCommand(&c);
	372	return 0;
	373	}
	374
52cf34c1	375	int CmdLegicRfFill(const char *Cmd) {
52cf34c1	376	UsbCommand cmd = {CMD_WRITER_LEGIC_RF};
1a07fd51	377	int res = sscanf(Cmd, " 0x%"llx" 0x%"llx" 0x%"llx, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]);
3612a8a8	378	if(res != 3) {
	379	PrintAndLog("Please specify the offset, length and value as two hex strings");
	380	return -1;
	381	}
	382
	383	int i;
52cf34c1	384	UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 0, 0}};
3612a8a8	385	for(i = 0; i < 48; i++) {
52cf34c1	386	c.d.asBytes[i] = cmd.arg[2];
3612a8a8	387	}
52cf34c1	388
	389	for(i = 0; i < 22; i++) {
	390	c.arg[0] = i*48;
	391	SendCommand(&c);
	392	WaitForResponse(CMD_ACK,NULL);
	393	}
	394	clearCommandBuffer();
3612a8a8	395	SendCommand(&cmd);
	396	return 0;
	397	}
	398
3b920280	399	int CmdLegicCalcCrc8(const char *Cmd){
	400
	401	int len = strlen(Cmd);
	402	if (len & 1 ) return usage_legic_calccrc8();
	403
	404	uint8_t *data = malloc(len);
	405	if ( data == NULL ) return 1;
	406
	407	param_gethex(Cmd, 0, data, len );
	408
	409	uint32_t checksum = CRC8Legic(data, len/2);
	410	PrintAndLog("Bytes: %s \|\| CRC8: %X", sprint_hex(data, len/2), checksum );
	411	free(data);
	412	return 0;
	413	}
	414
52cf34c1	415	static command_t CommandTable[] = {
3b920280	416	{"help", CmdHelp, 1, "This help"},
	417	{"decode", CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
	418	{"read", CmdLegicRFRead, 0, "[offset][length] -- read bytes from a LEGIC card"},
	419	{"save", CmdLegicSave, 0, "<filename> [<length>] -- Store samples"},
	420	{"load", CmdLegicLoad, 0, "<filename> -- Restore samples"},
	421	{"sim", CmdLegicRfSim, 0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},
	422	{"write", CmdLegicRfWrite,0, "<offset> <length> -- Write sample buffer (user after load or read)"},
	423	{"fill", CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
	424	{"crc8", CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"},
52cf34c1	425	{NULL, NULL, 0, NULL}
	426	};
	427
	428	int CmdHFLegic(const char *Cmd) {
	429	clearCommandBuffer();
	430	CmdsParse(CommandTable, Cmd);
	431	return 0;
	432	}
	433
	434	int CmdHelp(const char *Cmd) {
	435	CmdsHelp(CommandTable);
	436	return 0;
	437	}