[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 "cmdhflegic.h"

#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "comms.h"
#include "ui.h"
#include "cmdparser.h"
#include "cmdmain.h"
#include "util.h"
#include "../include/legic.h"

static int CmdHelp(const char *Cmd);

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)"},
  {"reader",      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, "[tagtype, 0:MIM22, 1:MIM256, 2:MIM1024] 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"},
  {NULL, NULL, 0, NULL}
};

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

int CmdHelp(const char *Cmd)
{
  CmdsHelp(CommandTable);
  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)
{
  int i, j, k, n;
  int segment_len = 0;
  int segment_flag = 0;
  int stamp_len = 0;
  int crc = 0;
  int wrp = 0;
  int wrc = 0;
  uint8_t data_buf[1053]; // receiver buffer
  char out_string[3076]; // just use big buffer - bad practice
  char token_type[4];
  
  // copy data from proxmark into buffer
   GetFromBigBuf(data_buf, sizeof(data_buf), 0, NULL, -1, false);
    
  // Output CDF System area (9 bytes) plus remaining header area (12 bytes)
  
  PrintAndLog("\nCDF: System Area");
  
  PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x",
    data_buf[0],
    data_buf[1],
    data_buf[2],
    data_buf[3],
    data_buf[4]
  );
  
  crc = data_buf[4];
 
  switch (data_buf[5]&0x7f) {
    case 0x00 ... 0x2f:
      strncpy(token_type, "IAM",sizeof(token_type));
      break;
    case 0x30 ... 0x6f:
      strcpy(token_type, "SAM");
      break;
    case 0x70 ... 0x7f:
      strcpy(token_type, "GAM");
      break;
    default:
      strcpy(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("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
      data_buf[9],
    data_buf[10],
    data_buf[11],
    data_buf[12],
    data_buf[13],
    data_buf[14],
    data_buf[15],
    data_buf[16],
    data_buf[17],
    data_buf[18],
    data_buf[19],
    data_buf[20],
    data_buf[21]
  );
  
  PrintAndLog("\nADF: User Area");
  
  i = 22;  
  for (n=0; n<64; n++) {
    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;
    
     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",
      n,
      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,
      (data_buf[i+4]^crc)
    );
    
    i+=5;
    
    if (wrc>0) {
      PrintAndLog("WRC protected area:");
      for (k=0, j=0; k < wrc && j<(sizeof(out_string)-3); k++, i++, j += 3) {
        sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
        out_string[j+2] = ' ';
      };
        
      out_string[j] = '\0';
    
      PrintAndLog("%s", out_string);
    }
    
    if (wrp>wrc) {
      PrintAndLog("Remaining write protected area:");
      
      for (k=0, j=0; k < (wrp-wrc) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
        sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
        out_string[j+2] = ' ';
      };
    
      out_string[j] = '\0';
    
      PrintAndLog("%s", out_string);
      if((wrp-wrc) == 8) {
        sprintf(out_string,"Card ID: %2X%02X%02X",data_buf[i-4]^crc,data_buf[i-3]^crc,data_buf[i-2]^crc);
        PrintAndLog("%s", out_string);
      }
    }
    
    PrintAndLog("Remaining segment payload:");
    for (k=0, j=0; k < (segment_len - wrp - 5) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
      sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
      out_string[j+2] = ' ';
    };
    
    out_string[j] = '\0';
    
    PrintAndLog("%s", out_string);
    
    // end with last segment
    if (segment_flag & 0x8)
      return 0;
  };
  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}};
  SendCommand(&c);
  UsbCommand resp;
  WaitForResponse(CMD_ACK,&resp);
  switch (resp.arg[0]) {
    case 0:
      PrintAndLog("Card (MIM %i) read, use 'hf legic decode' or", ((legic_card_select_t*)resp.d.asBytes)->cardsize);
      PrintAndLog("'data hexsamples %d' to view results", (resp.arg[1] + 7) & ~7);
      break;
    case 1:
      PrintAndLog("No or unknown card found, aborting");
      break;
    case 2:
      PrintAndLog("operation failed @ 0x%03.3x", resp.arg[1]);
      break;
  }
  return resp.arg[0];
}

int CmdLegicLoad(const char *Cmd)
{
	char filename[FILE_PATH_SIZE] = {0x00};
	int len = 0;
	
	if (param_getchar(Cmd, 0) == 'h' || param_getchar(Cmd, 0)== 0x00) {
		PrintAndLog("It loads datasamples from the file `filename`");
		PrintAndLog("Usage:  hf legic load <file name>");
		PrintAndLog(" sample: hf legic load filename");
		return 0;
	}

	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; unsigned int data[8];
    while(fgets(line, sizeof(line), f)) {
        int res = sscanf(line, "%x %x %x %x %x %x %x %x", 
            &data[0], &data[1], &data[2], &data[3],
            &data[4], &data[5], &data[6], &data[7]);
        if(res != 8) {
          PrintAndLog("Error: could not read samples");
          fclose(f);
          return -1;
        }
        UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 1, 0}};
        int j; for(j = 0; j < 8; j++) {
            c.d.asBytes[j] = data[j];
        }
        SendCommand(&c);
        WaitForResponse(CMD_ACK, NULL);
        offset += 8;
    }
    fclose(f);
    PrintAndLog("loaded %u samples", offset);
    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];
  
  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, NULL, -1, false);

  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};
   c.arg[0] = 1;
   sscanf(Cmd, " %" SCNi64, &c.arg[0]);
   SendCommand(&c);
   return 0;
}

int CmdLegicRfWrite(const char *Cmd)
{
    UsbCommand c={CMD_WRITER_LEGIC_RF};
    int res = sscanf(Cmd, " 0x%" SCNx64 " 0x%" SCNx64, &c.arg[0], &c.arg[1]);
	if(res != 2) {
		PrintAndLog("Please specify the offset and length as two hex strings");
        return -1;
    }
    SendCommand(&c);
    return 0;
}

int CmdLegicRfFill(const char *Cmd)
{
    UsbCommand cmd ={CMD_WRITER_LEGIC_RF};
    int res = sscanf(Cmd, " 0x%" SCNx64 " 0x%" SCNx64 " 0x%" SCNx64, &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, 1, 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);
    }
    SendCommand(&cmd);
    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
ad939de5	11	#include "cmdhflegic.h"
ad939de5	12
8e220a91	13	#include <stdio.h>
8e220a91	14	#include <string.h>
43534cba	15	#include <inttypes.h>
ad939de5	16	#include "comms.h"
41dab153	17	#include "ui.h"
7fe9b0b7	18	#include "cmdparser.h"
669c1b80	19	#include "cmdmain.h"
31d1caa5	20	#include "util.h"
bad58246	21	#include "../include/legic.h"
ad939de5	22
7fe9b0b7	23	static int CmdHelp(const char *Cmd);
7fe9b0b7	24
7fe9b0b7	25	static command_t CommandTable[] =
	26	{
	27	{"help", CmdHelp, 1, "This help"},
669c1b80	28	{"decode", CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
41dab153	29	{"reader", CmdLegicRFRead, 0, "[offset [length]] -- read bytes from a LEGIC card"},
3612a8a8	30	{"save", CmdLegicSave, 0, "<filename> [<length>] -- Store samples"},
3612a8a8	31	{"load", CmdLegicLoad, 0, "<filename> -- Restore samples"},
1b902aa0	32	{"sim", CmdLegicRfSim, 0, "[tagtype, 0:MIM22, 1:MIM256, 2:MIM1024] Start tag simulator (use after load or read)"},
3612a8a8	33	{"write", CmdLegicRfWrite,0, "<offset> <length> -- Write sample buffer (user after load or read)"},
3612a8a8	34	{"fill", CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
7fe9b0b7	35	{NULL, NULL, 0, NULL}
	36	};
	37
	38	int CmdHFLegic(const char *Cmd)
	39	{
	40	CmdsParse(CommandTable, Cmd);
	41	return 0;
	42	}
	43
	44	int CmdHelp(const char *Cmd)
	45	{
	46	CmdsHelp(CommandTable);
	47	return 0;
	48	}
669c1b80	49
	50	/*
	51	* Output BigBuf and deobfuscate LEGIC RF tag data.
	52	* This is based on information given in the talk held
	53	* by Henryk Ploetz and Karsten Nohl at 26c3
669c1b80	54	*/
	55	int CmdLegicDecode(const char *Cmd)
	56	{
4961e292	57	int i, j, k, n;
669c1b80	58	int segment_len = 0;
	59	int segment_flag = 0;
	60	int stamp_len = 0;
	61	int crc = 0;
	62	int wrp = 0;
	63	int wrc = 0;
bf824347	64	uint8_t data_buf[1053]; // receiver buffer
669c1b80	65	char out_string[3076]; // just use big buffer - bad practice
669c1b80	66	char token_type[4];
669c1b80	67
669c1b80	68	// copy data from proxmark into buffer
babca445	69	GetFromBigBuf(data_buf, sizeof(data_buf), 0, NULL, -1, false);
669c1b80	70
	71	// Output CDF System area (9 bytes) plus remaining header area (12 bytes)
	72
	73	PrintAndLog("\nCDF: System Area");
	74
	75	PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x",
	76	data_buf[0],
	77	data_buf[1],
	78	data_buf[2],
	79	data_buf[3],
	80	data_buf[4]
	81	);
	82
	83	crc = data_buf[4];
	84
	85	switch (data_buf[5]&0x7f) {
	86	case 0x00 ... 0x2f:
	87	strncpy(token_type, "IAM",sizeof(token_type));
	88	break;
	89	case 0x30 ... 0x6f:
	90	strcpy(token_type, "SAM");
	91	break;
	92	case 0x70 ... 0x7f:
	93	strcpy(token_type, "GAM");
	94	break;
	95	default:
	96	strcpy(token_type, "???");
	97	break;
	98	}
	99
	100	stamp_len = 0xfc - data_buf[6];
	101
	102	PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
	103	data_buf[5],
	104	data_buf[6],
	105	token_type,
	106	(data_buf[5]&0x80)>>7,
	107	stamp_len
	108	);
	109
	110	PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
	111	data_buf[7]&0x0f,
	112	(data_buf[7]&0x70)>>4,
	113	(data_buf[7]&0x80)>>7,
	114	data_buf[7],
	115	data_buf[8]
	116	);
	117
	118	PrintAndLog("Remaining Header Area");
	119
	120	PrintAndLog("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
	121	data_buf[9],
	122	data_buf[10],
	123	data_buf[11],
	124	data_buf[12],
	125	data_buf[13],
	126	data_buf[14],
	127	data_buf[15],
	128	data_buf[16],
	129	data_buf[17],
	130	data_buf[18],
	131	data_buf[19],
	132	data_buf[20],
	133	data_buf[21]
134	);
135
136	PrintAndLog("\nADF: User Area");
137
41dab153	138	i = 22;
669c1b80	139	for (n=0; n<64; n++) {
	140	segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc);
	141	segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4;
	142
	143	wrp = (data_buf[i+2]^crc);
	144	wrc = ((data_buf[i+3]^crc)&0x70)>>4;
	145
	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",
	147	n,
	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,
	153	(segment_flag&0x4)>>2,
	154	(segment_flag&0x8)>>3,
	155	segment_len,
	156	wrp,
	157	wrc,
	158	((data_buf[i+3]^crc)&0x80)>>7,
	159	(data_buf[i+4]^crc)
	160	);
	161
	162	i+=5;
	163
	164	if (wrc>0) {
	165	PrintAndLog("WRC protected area:");
31332265	166	for (k=0, j=0; k < wrc && j<(sizeof(out_string)-3); k++, i++, j += 3) {
669c1b80	167	sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
	168	out_string[j+2] = ' ';
	169	};
	170
	171	out_string[j] = '\0';
	172
	173	PrintAndLog("%s", out_string);
	174	}
	175
	176	if (wrp>wrc) {
	177	PrintAndLog("Remaining write protected area:");
	178
31332265	179	for (k=0, j=0; k < (wrp-wrc) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
669c1b80	180	sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
	181	out_string[j+2] = ' ';
	182	};
	183
	184	out_string[j] = '\0';
	185
	186	PrintAndLog("%s", out_string);
	187	if((wrp-wrc) == 8) {
	188	sprintf(out_string,"Card ID: %2X%02X%02X",data_buf[i-4]^crc,data_buf[i-3]^crc,data_buf[i-2]^crc);
	189	PrintAndLog("%s", out_string);
	190	}
	191	}
	192
	193	PrintAndLog("Remaining segment payload:");
31332265	194	for (k=0, j=0; k < (segment_len - wrp - 5) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
669c1b80	195	sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
	196	out_string[j+2] = ' ';
	197	};
	198
	199	out_string[j] = '\0';
	200
	201	PrintAndLog("%s", out_string);
	202
	203	// end with last segment
	204	if (segment_flag & 0x8)
	205	return 0;
	206	};
	207	return 0;
	208	}
41dab153	209
	210	int CmdLegicRFRead(const char *Cmd)
	211	{
	212	int byte_count=0,offset=0;
	213	sscanf(Cmd, "%i %i", &offset, &byte_count);
a2b1414f	214	if(byte_count == 0) byte_count = -1;
a2b1414f	215	if(byte_count + offset > 1024) byte_count = 1024 - offset;
41dab153	216	UsbCommand c={CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
41dab153	217	SendCommand(&c);
bad58246 AVS	218	UsbCommand resp;
	219	WaitForResponse(CMD_ACK,&resp);
	220	switch (resp.arg[0]) {
	221	case 0:
	222	PrintAndLog("Card (MIM %i) read, use 'hf legic decode' or", ((legic_card_select_t*)resp.d.asBytes)->cardsize);
	223	PrintAndLog("'data hexsamples %d' to view results", (resp.arg[1] + 7) & ~7);
	224	break;
	225	case 1:
	226	PrintAndLog("No or unknown card found, aborting");
	227	break;
	228	case 2:
	229	PrintAndLog("operation failed @ 0x%03.3x", resp.arg[1]);
	230	break;
	231	}
	232	return resp.arg[0];
41dab153	233	}
3612a8a8	234
	235	int CmdLegicLoad(const char *Cmd)
	236	{
b915fda3	237	char filename[FILE_PATH_SIZE] = {0x00};
	238	int len = 0;
	239
	240	if (param_getchar(Cmd, 0) == 'h' \|\| param_getchar(Cmd, 0)== 0x00) {
	241	PrintAndLog("It loads datasamples from the file `filename`");
	242	PrintAndLog("Usage: hf legic load <file name>");
	243	PrintAndLog(" sample: hf legic load filename");
	244	return 0;
	245	}
	246
	247	len = strlen(Cmd);
	248	if (len > FILE_PATH_SIZE) {
	249	PrintAndLog("Filepath too long (was %s bytes), max allowed is %s ", len, FILE_PATH_SIZE);
	250	return 0;
	251	}
	252	memcpy(filename, Cmd, len);
	253
	254	FILE *f = fopen(filename, "r");
3612a8a8	255	if(!f) {
	256	PrintAndLog("couldn't open '%s'", Cmd);
	257	return -1;
	258	}
	259	char line[80]; int offset = 0; unsigned int data[8];
	260	while(fgets(line, sizeof(line), f)) {
	261	int res = sscanf(line, "%x %x %x %x %x %x %x %x",
	262	&data[0], &data[1], &data[2], &data[3],
	263	&data[4], &data[5], &data[6], &data[7]);
	264	if(res != 8) {
	265	PrintAndLog("Error: could not read samples");
	266	fclose(f);
	267	return -1;
	268	}
8c8317a5	269	UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 1, 0}};
3612a8a8	270	int j; for(j = 0; j < 8; j++) {
	271	c.d.asBytes[j] = data[j];
	272	}
	273	SendCommand(&c);
902cb3c0	274	WaitForResponse(CMD_ACK, NULL);
3612a8a8	275	offset += 8;
	276	}
	277	fclose(f);
	278	PrintAndLog("loaded %u samples", offset);
	279	return 0;
	280	}
	281
	282	int CmdLegicSave(const char *Cmd)
	283	{
3612a8a8	284	int requested = 1024;
3612a8a8	285	int offset = 0;
4961e292	286	int delivered = 0;
b915fda3	287	char filename[FILE_PATH_SIZE];
4961e292	288	uint8_t got[1024];
4961e292	289
3612a8a8	290	sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
3612a8a8	291
4961e292	292	/* If no length given save entire legic read buffer */
4961e292	293	/* round up to nearest 8 bytes so the saved data can be used with legicload */
3612a8a8	294	if (requested == 0) {
4961e292	295	requested = 1024;
3612a8a8	296	}
4961e292	297	if (requested % 8 != 0) {
	298	int remainder = requested % 8;
	299	requested = requested + 8 - remainder;
	300	}
4961e292	301	if (offset + requested > sizeof(got)) {
	302	PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
	303	return 0;
	304	}
	305
3612a8a8	306	FILE *f = fopen(filename, "w");
	307	if(!f) {
	308	PrintAndLog("couldn't open '%s'", Cmd+1);
	309	return -1;
	310	}
	311
babca445	312	GetFromBigBuf(got, requested, offset, NULL, -1, false);
4961e292	313
	314	for (int j = 0; j < requested; j += 8) {
	315	fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
	316	got[j+0],
	317	got[j+1],
	318	got[j+2],
	319	got[j+3],
	320	got[j+4],
	321	got[j+5],
	322	got[j+6],
	323	got[j+7]
	324	);
	325	delivered += 8;
3612a8a8	326	if (delivered >= requested)
	327	break;
	328	}
	329
	330	fclose(f);
	331	PrintAndLog("saved %u samples", delivered);
	332	return 0;
	333	}
	334
	335	int CmdLegicRfSim(const char *Cmd)
	336	{
	337	UsbCommand c={CMD_SIMULATE_TAG_LEGIC_RF};
1b902aa0 A	338	c.arg[0] = 1;
1b902aa0 A	339	sscanf(Cmd, " %" SCNi64, &c.arg[0]);
3612a8a8	340	SendCommand(&c);
	341	return 0;
	342	}
	343
	344	int CmdLegicRfWrite(const char *Cmd)
	345	{
	346	UsbCommand c={CMD_WRITER_LEGIC_RF};
43534cba	347	int res = sscanf(Cmd, " 0x%" SCNx64 " 0x%" SCNx64, &c.arg[0], &c.arg[1]);
3612a8a8	348	if(res != 2) {
	349	PrintAndLog("Please specify the offset and length as two hex strings");
	350	return -1;
	351	}
	352	SendCommand(&c);
	353	return 0;
	354	}
	355
	356	int CmdLegicRfFill(const char *Cmd)
	357	{
	358	UsbCommand cmd ={CMD_WRITER_LEGIC_RF};
43534cba	359	int res = sscanf(Cmd, " 0x%" SCNx64 " 0x%" SCNx64 " 0x%" SCNx64, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]);
3612a8a8	360	if(res != 3) {
	361	PrintAndLog("Please specify the offset, length and value as two hex strings");
	362	return -1;
	363	}
	364
	365	int i;
8c8317a5	366	UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 1, 0}};
3612a8a8	367	for(i = 0; i < 48; i++) {
	368	c.d.asBytes[i] = cmd.arg[2];
	369	}
	370	for(i = 0; i < 22; i++) {
	371	c.arg[0] = i*48;
	372	SendCommand(&c);
902cb3c0	373	WaitForResponse(CMD_ACK,NULL);
3612a8a8	374	}
	375	SendCommand(&cmd);
	376	return 0;
	377	}
	378