//-----------------------------------------------------------------------------
// 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 ISO14443B commands
//-----------------------------------------------------------------------------

#include "cmdhf14b.h"

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <stdint.h>
#include "iso14443crc.h"
#include "comms.h"
#include "graph.h"
#include "util.h"
#include "ui.h"
#include "cmdparser.h"
#include "cmdmain.h"
#include "taginfo.h"


static int CmdHelp(const char *Cmd);

int CmdHF14BList(const char *Cmd)
{
	PrintAndLog("Deprecated command, use 'hf list 14b' instead");

	return 0;
}

int CmdHF14BSim(const char *Cmd)
{
  UsbCommand c={CMD_SIMULATE_TAG_ISO_14443B};
  clearCommandBuffer();
  SendCommand(&c);
  return 0;
}

int CmdHF14BSnoop(const char *Cmd)
{
  UsbCommand c = {CMD_SNOOP_ISO_14443B};
  clearCommandBuffer();
  SendCommand(&c);
  return 0;
}

/* New command to read the contents of a SRI512 tag
 * SRI512 tags are ISO14443-B modulated memory tags,
 * this command just dumps the contents of the memory
 */
int CmdSri512Read(const char *Cmd)
{
  UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
  clearCommandBuffer();
  SendCommand(&c);
  return 0;
}

/* New command to read the contents of a SRIX4K tag
 * SRIX4K tags are ISO14443-B modulated memory tags,
 * this command just dumps the contents of the memory/
 */
int CmdSrix4kRead(const char *Cmd)
{
  UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
  clearCommandBuffer();
  SendCommand(&c);
  return 0;
}

int rawClose(void){
	UsbCommand resp;
	UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}};
	clearCommandBuffer();
	SendCommand(&c);
	if (!WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
		return 0;
	}
	return 0;
}

int HF14BCmdRaw(bool reply, bool *crc, bool power, uint8_t *data, uint8_t *datalen, bool verbose){
	UsbCommand resp;
	UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv,power
	if(*crc)
	{
		uint8_t first, second;
		ComputeCrc14443(CRC_14443_B, data, *datalen, &first, &second);
		data[*datalen] = first;
		data[*datalen + 1] = second;
		*datalen += 2;
	}
	
	c.arg[0] = *datalen;
	c.arg[1] = reply;
	c.arg[2] = power;
	memcpy(c.d.asBytes,data,*datalen);
	clearCommandBuffer();
	SendCommand(&c);
	
	if (!reply) return 1; 

	if (!WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
		if (verbose) PrintAndLog("timeout while waiting for reply.");
		return 0;
	}
	*datalen = resp.arg[0];
	if (verbose) PrintAndLog("received %u octets", *datalen);
	if(*datalen<2) return 0;

	memcpy(data, resp.d.asBytes, *datalen);
	if (verbose) PrintAndLog("%s", sprint_hex(data, *datalen));

	uint8_t first, second;
	ComputeCrc14443(CRC_14443_B, data, *datalen-2, &first, &second);
	if(data[*datalen-2] == first && data[*datalen-1] == second) {
		if (verbose) PrintAndLog("CRC OK");
		*crc = true;
	} else {
		if (verbose) PrintAndLog("CRC failed");
		*crc = false;
	}
	return 1;
}

int CmdHF14BCmdRaw (const char *Cmd) {
	bool reply = true;
	bool crc = false;
	bool power = false;
	bool select = false;
	bool SRx = false;
	char buf[5] = "";
	uint8_t data[100] = {0x00};
	uint8_t datalen = 0;
	unsigned int temp;
	int i = 0;
	if (strlen(Cmd)<3) {
			PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] [-s || -ss] <0A 0B 0C ... hex>");
			PrintAndLog("       -r    do not read response");
			PrintAndLog("       -c    calculate and append CRC");
			PrintAndLog("       -p    leave the field on after receive");
			PrintAndLog("       -s    active signal field ON with select");
			PrintAndLog("       -ss   active signal field ON with select for SRx ST Microelectronics tags");
			return 0;
	}

	// strip
	while (*Cmd==' ' || *Cmd=='\t') Cmd++;
	
	while (Cmd[i]!='\0') {
		if (Cmd[i]==' ' || Cmd[i]=='\t') { i++; continue; }
		if (Cmd[i]=='-') {
			switch (Cmd[i+1]) {
				case 'r': 
				case 'R': 
					reply = false;
					break;
				case 'c':
				case 'C':                
					crc = true;
					break;
				case 'p': 
				case 'P': 
					power = true;
					break;
				case 's':
				case 'S':
					select = true;
					if (Cmd[i+2]=='s' || Cmd[i+2]=='S') {
						SRx = true;
						i++;
					}
					break;
				default:
					PrintAndLog("Invalid option");
					return 0;
			}
			i+=2;
			continue;
		}
		if ((Cmd[i]>='0' && Cmd[i]<='9') ||
		    (Cmd[i]>='a' && Cmd[i]<='f') ||
		    (Cmd[i]>='A' && Cmd[i]<='F') ) {
			buf[strlen(buf)+1]=0;
			buf[strlen(buf)]=Cmd[i];
			i++;
			
			if (strlen(buf)>=2) {
				sscanf(buf,"%x",&temp);
				data[datalen++]=(uint8_t)(temp & 0xff);
				*buf=0;
			}
			continue;
		}
		PrintAndLog("Invalid char on input");
		return 0;
	}
	if (datalen == 0)
	{
		PrintAndLog("Missing data input");
		return 0;
	}

	if (select){ //auto select 14b tag
		uint8_t	cmd2[16];
		bool crc2 = true;
		uint8_t cmdLen;

		if (SRx) {
			// REQ SRx
			cmdLen = 2;
			cmd2[0] = 0x06;
			cmd2[1] = 0x00;
		} else {
			cmdLen = 3;
			// REQB
			cmd2[0] = 0x05;
			cmd2[1] = 0x00;
			cmd2[2] = 0x08;
		}

		if (HF14BCmdRaw(true, &crc2, true, cmd2, &cmdLen, false)==0) return rawClose();

		if ( SRx && (cmdLen != 3 || !crc2) ) return rawClose();
		else if (cmd2[0] != 0x50 || cmdLen != 14 || !crc2) return rawClose();
		
		uint8_t chipID = 0;
		if (SRx) {
			// select
			chipID = cmd2[0];
			cmd2[0] = 0x0E;
			cmd2[1] = chipID;
			cmdLen = 2;
		} else {
			// attrib
			cmd2[0] = 0x1D; 
			// UID from cmd2[1 - 4]
			cmd2[5] = 0x00;
			cmd2[6] = 0x08;
			cmd2[7] = 0x01;
			cmd2[8] = 0x00;
			cmdLen = 9;
		}

		if (HF14BCmdRaw(true, &crc2, true, cmd2, &cmdLen, false)==0) return rawClose();

		if (cmdLen != 3 || !crc2) return rawClose();
		if (SRx && cmd2[0] != chipID) return rawClose();
	}
	return HF14BCmdRaw(reply, &crc, power, data, &datalen, true);
}

// print full atqb info
static void print_atqb_resp(uint8_t *data){
	//PrintAndLog ("           UID: %s", sprint_hex(data+1,4));
	PrintAndLog ("      App Data: %s", sprint_hex(data+5,4));
	PrintAndLog ("      Protocol: %s", sprint_hex(data+9,3));
	uint8_t BitRate = data[9];
	if (!BitRate) 
		PrintAndLog ("      Bit Rate: 106 kbit/s only PICC <-> PCD");
	if (BitRate & 0x10)
		PrintAndLog ("      Bit Rate: 212 kbit/s PICC -> PCD supported");
	if (BitRate & 0x20)
		PrintAndLog ("      Bit Rate: 424 kbit/s PICC -> PCD supported"); 
	if (BitRate & 0x40)
		PrintAndLog ("      Bit Rate: 847 kbit/s PICC -> PCD supported"); 
	if (BitRate & 0x01)
		PrintAndLog ("      Bit Rate: 212 kbit/s PICC <- PCD supported");
	if (BitRate & 0x02)
		PrintAndLog ("      Bit Rate: 424 kbit/s PICC <- PCD supported"); 
	if (BitRate & 0x04)
		PrintAndLog ("      Bit Rate: 847 kbit/s PICC <- PCD supported"); 
	if (BitRate & 0x80) 
		PrintAndLog ("                Same bit rate <-> required");

	uint16_t maxFrame = data[10]>>4;
	if (maxFrame < 5) 
		maxFrame = 8*maxFrame + 16;
	else if (maxFrame == 5)
		maxFrame = 64;
	else if (maxFrame == 6)
		maxFrame = 96;
	else if (maxFrame == 7)
		maxFrame = 128;
	else if (maxFrame == 8)
		maxFrame = 256;
	else
		maxFrame = 257;

	PrintAndLog ("Max Frame Size: %u%s",maxFrame, (maxFrame == 257) ? "+ RFU" : "");

	uint8_t protocolT = data[10] & 0xF;
	PrintAndLog (" Protocol Type: Protocol is %scompliant with ISO/IEC 14443-4",(protocolT) ? "" : "not " );
	PrintAndLog ("Frame Wait Int: %u", data[11]>>4);
	PrintAndLog (" App Data Code: Application is %s",(data[11]&4) ? "Standard" : "Proprietary");
	PrintAndLog (" Frame Options: NAD is %ssupported",(data[11]&2) ? "" : "not ");
	PrintAndLog (" Frame Options: CID is %ssupported",(data[11]&1) ? "" : "not ");
	PrintAndLog ("Max Buf Length: %u (MBLI) %s",data[14]>>4, (data[14] & 0xF0) ? "" : "not supported");
	
	return;
}


int print_ST_Lock_info(uint8_t model){
	//assume connection open and tag selected...
	uint8_t data[16] = {0x00};
	uint8_t datalen = 2;
	bool crc = true;
	uint8_t resplen;
	uint8_t	blk1;
	data[0] = 0x08;

	if (model == 0x2) { //SR176 has special command:
		data[1] = 0xf;
		resplen = 4;			
	} else {
		data[1] = 0xff;
		resplen = 6;
	}

	//std read cmd
	if (HF14BCmdRaw(true, &crc, true, data, &datalen, false)==0) return rawClose();

	if (datalen != resplen || !crc) return rawClose();

	PrintAndLog("Chip Write Protection Bits:");
	// now interpret the data
	switch (model){
		case 0x0: //fall through (SRIX4K special)
		case 0x3: //fall through (SRIx4K)
		case 0x7: //             (SRI4K)
			//only need data[3]
			blk1 = 9;
			PrintAndLog("   raw: %s",printBits(1,data+3));
			PrintAndLog(" 07/08:%slocked", (data[3] & 1) ? " not " : " " );
			for (uint8_t i = 1; i<8; i++){
				PrintAndLog("    %02u:%slocked", blk1, (data[3] & (1 << i)) ? " not " : " " );
				blk1++;
			}
			break;
		case 0x4: //fall through (SRIX512)
		case 0x6: //fall through (SRI512)
		case 0xC: //             (SRT512)
			//need data[2] and data[3]
			blk1 = 0;
			PrintAndLog("   raw: %s",printBits(2,data+2));
			for (uint8_t b=2; b<4; b++){
				for (uint8_t i=0; i<8; i++){
					PrintAndLog("    %02u:%slocked", blk1, (data[b] & (1 << i)) ? " not " : " " );
					blk1++;
				}
			}
			break;
		case 0x2: //             (SR176)
			//need data[2]
			blk1 = 0;
			PrintAndLog("   raw: %s",printBits(1,data+2));
			for (uint8_t i = 0; i<8; i++){
				PrintAndLog(" %02u/%02u:%slocked", blk1, blk1+1, (data[2] & (1 << i)) ? " " : " not " );
				blk1+=2;
			}
			break;
		default:
			return rawClose();
	}
	return 1;
}

// print UID info from SRx chips (ST Microelectronics)
static void print_st_general_info(uint8_t *data){
	//uid = first 8 bytes in data
	PrintAndLog("   UID: %s", sprint_hex(SwapEndian64(data,8,8),8));
	PrintAndLog("   MFG: %02X, %s", data[6], getManufacturerName(data[6]));
	PrintAndLog("  Chip: %02X, %s", data[5], getChipInfo(data[6], data[5]));
	return;
}

// 14b get and print UID only (general info)
int HF14BStdReader(uint8_t *data, uint8_t *datalen){
	//05 00 00 = find one tag in field
	//1d xx xx xx xx 00 08 01 00 = attrib xx=UID (resp 10 [f9 e0])
	//a3 = ?  (resp 03 [e2 c2])
	//02 = ?  (resp 02 [6a d3])
	// 022b (resp 02 67 00 [29  5b])
	// 0200a40400 (resp 02 67 00 [29 5b])
	// 0200a4040c07a0000002480300 (resp 02 67 00 [29 5b])
	// 0200a4040c07a0000002480200 (resp 02 67 00 [29 5b])
	// 0200a4040006a0000000010100 (resp 02 6a 82 [4b 4c])
	// 0200a4040c09d27600002545500200 (resp 02 67 00 [29 5b])
	// 0200a404000cd2760001354b414e4d30310000 (resp 02 6a 82 [4b 4c])
	// 0200a404000ca000000063504b43532d313500 (resp 02 6a 82 [4b 4c])
	// 0200a4040010a000000018300301000000000000000000 (resp 02 6a 82 [4b 4c])
	//03 = ?  (resp 03 [e3 c2])
	//c2 = ?  (resp c2 [66 15])
	//b2 = ?  (resp a3 [e9 67])
	//a2 = ?  (resp 02 [6a d3])
	bool crc = true;
	*datalen = 3;
	//std read cmd
	data[0] = 0x05;
	data[1] = 0x00;
	data[2] = 0x08;

	if (HF14BCmdRaw(true, &crc, true, data, datalen, false)==0) return rawClose();

	if (data[0] != 0x50 || *datalen != 14 || !crc) return rawClose();

	PrintAndLog ("\n14443-3b tag found:");
	PrintAndLog ("           UID: %s", sprint_hex(data+1,4));

	uint8_t	cmd2[16];
	uint8_t cmdLen = 3;
	bool crc2 = true;

	cmd2[0] = 0x1D; 
	// UID from data[1 - 4]
	cmd2[1] = data[1];
	cmd2[2] = data[2];
	cmd2[3] = data[3];
	cmd2[4] = data[4];
	cmd2[5] = 0x00;
	cmd2[6] = 0x08;
	cmd2[7] = 0x01;
	cmd2[8] = 0x00;
	cmdLen = 9;

	// attrib
	if (HF14BCmdRaw(true, &crc2, true, cmd2, &cmdLen, false)==0) return rawClose();

	if (cmdLen != 3 || !crc2) return rawClose();
	// add attrib responce to data
	data[14] = cmd2[0];
	rawClose();
	return 1;
}

// 14b get and print Full Info (as much as we know)
int HF14BStdInfo(uint8_t *data, uint8_t *datalen){
	if (!HF14BStdReader(data,datalen)) return 0;

	//add more info here
	print_atqb_resp(data);


	return 1;
}

// SRx get and print general info about SRx chip from UID
int HF14B_ST_Reader(uint8_t *data, uint8_t *datalen, bool closeCon){
	bool crc = true;
	*datalen = 2;
	//wake cmd
	data[0] = 0x06;
	data[1] = 0x00;

	//leave power on
	// verbose on for now for testing - turn off when functional
	if (HF14BCmdRaw(true, &crc, true, data, datalen, false)==0) return rawClose();

	if (*datalen != 3 || !crc) return rawClose();

	uint8_t chipID = data[0];
	// select
	data[0] = 0x0E;
	data[1] = chipID;
	*datalen = 2;

	//leave power on
	if (HF14BCmdRaw(true, &crc, true, data, datalen, false)==0) return rawClose();

	if (*datalen != 3 || !crc || data[0] != chipID) return rawClose();

	// get uid
	data[0] = 0x0B;
	*datalen = 1;

	//leave power on
	if (HF14BCmdRaw(true, &crc, true, data, datalen, false)==0) return rawClose();

	if (*datalen != 10 || !crc) return rawClose();

	//power off ?
	if (closeCon) rawClose();

	PrintAndLog("\n14443-3b ST tag found:");
	print_st_general_info(data);
	return 1;
}

// SRx get and print full info (needs more info...)
int HF14B_ST_Info(uint8_t *data, uint8_t *datalen){
	if (!HF14B_ST_Reader(data, datalen, false)) return 0;
	
	//add locking bit information here.
	if (print_ST_Lock_info(data[5]>>2)) 
		rawClose();

	return 1;
}

// test for other 14b type tags (mimic another reader - don't have tags to identify)
int HF14B_Other_Reader(uint8_t *data, uint8_t *datalen){
	bool crc = true;
	*datalen = 4;
	//std read cmd
	data[0] = 0x00;
	data[1] = 0x0b;
	data[2] = 0x3f;
	data[3] = 0x80;

	if (HF14BCmdRaw(true, &crc, true, data, datalen, false)!=0) {
		if (*datalen > 2 || !crc) {
			PrintAndLog ("\n14443-3b tag found:");
			PrintAndLog ("Unknown tag type answered to a 0x000b3f80 command ans:");
			PrintAndLog ("%s",sprint_hex(data,*datalen));
			rawClose();
			return 1;
		}
	}

	crc = false;
	*datalen = 1;
	data[0] = 0x0a;

	if (HF14BCmdRaw(true, &crc, true, data, datalen, false)!=0) {
		if (*datalen > 0) {
			PrintAndLog ("\n14443-3b tag found:");
			PrintAndLog ("Unknown tag type answered to a 0x0A command ans:");
			PrintAndLog ("%s",sprint_hex(data,*datalen));
			rawClose();
			return 1;
		}
	}
	
	crc = false;
	*datalen = 1;
	data[0] = 0x0c;

	if (HF14BCmdRaw(true, &crc, true, data, datalen, false)!=0) {
		if (*datalen > 0) {
			PrintAndLog ("\n14443-3b tag found:");
			PrintAndLog ("Unknown tag type answered to a 0x0C command ans:");
			PrintAndLog ("%s",sprint_hex(data,*datalen));
			rawClose();
			return 1;
		}
	}
	rawClose();
	return 0;
}

// get and print all info known about any known 14b tag
int HF14BInfo(bool verbose){
	uint8_t data[100];
	uint8_t datalen = 5;
	
	// try std 14b (atqb)
	if (HF14BStdInfo(data, &datalen)) return 1;

	// try st 14b
	if (HF14B_ST_Info(data, &datalen)) return 1;

	// try unknown 14b read commands (to be identified later)
	//   could be read of calypso, CEPAS, moneo, or pico pass.
	if (HF14B_Other_Reader(data, &datalen)) return 1;

	if (verbose) PrintAndLog("no 14443B tag found");
	return 0;
}

// menu command to get and print all info known about any known 14b tag
int CmdHF14Binfo(const char *Cmd){
	return HF14BInfo(true);
}

// get and print general info about all known 14b chips
int HF14BReader(bool verbose){
	uint8_t data[100];
	uint8_t datalen = 5;
	
	// try std 14b (atqb)
	if (HF14BStdReader(data, &datalen)) return 1;

	// try st 14b
	if (HF14B_ST_Reader(data, &datalen, true)) return 1;

	// try unknown 14b read commands (to be identified later)
	//   could be read of calypso, CEPAS, moneo, or pico pass.
	if (HF14B_Other_Reader(data, &datalen)) return 1;

	if (verbose) PrintAndLog("no 14443B tag found");
	return 0;
}

// menu command to get and print general info about all known 14b chips
int CmdHF14BReader(const char *Cmd){
	return HF14BReader(true);
}

int CmdSriWrite( const char *Cmd){
/*
 * For SRIX4K  blocks 00 - 7F
 * hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
 *
 * For SR512  blocks 00 - 0F
 * hf 14b raw -c -p 09 $sr512wblock $sr512wdata
 * 
 * Special block FF =  otp_lock_reg block.
 * Data len 4 bytes-
 */
 	char cmdp = param_getchar(Cmd, 0);
	uint8_t blockno = -1;
	uint8_t data[4] = {0x00};
	bool isSrix4k = true;
	char str[20];	

	if (strlen(Cmd) < 1 || cmdp == 'h' || cmdp == 'H') {
		PrintAndLog("Usage:  hf 14b write <1|2> <BLOCK> <DATA>");
		PrintAndLog("    [1 = SRIX4K]");
		PrintAndLog("    [2 = SRI512]");
		PrintAndLog("    [BLOCK number depends on tag, special block == FF]");
		PrintAndLog("     sample: hf 14b write 1 7F 11223344");
		PrintAndLog("           : hf 14b write 1 FF 11223344");
		PrintAndLog("           : hf 14b write 2 15 11223344");
		PrintAndLog("           : hf 14b write 2 FF 11223344");
		return 0;
	}

	if ( cmdp == '2' )
		isSrix4k = false;
	
	//blockno = param_get8(Cmd, 1);
	
	if ( param_gethex(Cmd,1, &blockno, 2) ) {
		PrintAndLog("Block number must include 2 HEX symbols");
		return 0;
	}
	
	if ( isSrix4k ){
		if ( blockno > 0x7f && blockno != 0xff ){
			PrintAndLog("Block number out of range");
			return 0;
		}		
	} else {
		if ( blockno > 0x0f && blockno != 0xff ){
			PrintAndLog("Block number out of range");
			return 0;
		}		
	}
	
	if (param_gethex(Cmd, 2, data, 8)) {
		PrintAndLog("Data must include 8 HEX symbols");
		return 0;
	}
 
	if ( blockno == 0xff)
		PrintAndLog("[%s] Write special block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512" , blockno,  sprint_hex(data,4) );
	else
		PrintAndLog("[%s] Write block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512", blockno,  sprint_hex(data,4) );
 
	sprintf(str, "-c 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);

	CmdHF14BCmdRaw(str);
	return 0;
}

static command_t CommandTable[] = 
{
  {"help",        CmdHelp,        1, "This help"},
  {"info",        CmdHF14Binfo,   0, "Find and print details about a 14443B tag"},
  {"list",        CmdHF14BList,   0, "[Deprecated] List ISO 14443B history"},
  {"reader",      CmdHF14BReader, 0, "Act as a 14443B reader to identify a tag"},
  {"sim",         CmdHF14BSim,    0, "Fake ISO 14443B tag"},
  {"snoop",       CmdHF14BSnoop,  0, "Eavesdrop ISO 14443B"},
  {"sri512read",  CmdSri512Read,  0, "Read contents of a SRI512 tag"},
  {"srix4kread",  CmdSrix4kRead,  0, "Read contents of a SRIX4K tag"},
  {"sriwrite",    CmdSriWrite,    0, "Write data to a SRI512 | SRIX4K tag"},
  {"raw",         CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
  {NULL, NULL, 0, NULL}
};

int CmdHF14B(const char *Cmd)
{
  CmdsParse(CommandTable, Cmd);
  return 0;
}

int CmdHelp(const char *Cmd)
{
  CmdsHelp(CommandTable);
  return 0;
}