<?php

class PGPShare
{
	public $mysqli;
	public $errormsg;
	
	function __construct()
	{
		include("config.php");
		
		$this->mysqli = new mysqli($db['host'], $db['user'], $db['pass'], $db['name']);
	}
	
	function AddUser1Key($key)
	{
		$id = substr(hash("SHA512", microtime()), 10, 10);
		$ip = $_SERVER['REMOTE_ADDR'];
		
		if(strlen($key) == 0) { $this->errormsg = 1; return false; }
		elseif(strlen($key) < 10) { $this->errormsg = 2; return false; }
		elseif(strlen($key) > 4294967295) { $this->errormsg = 3; return false; }
		else
		{
			$user2key = "None";
		
			$query = $this->mysqli->prepare("INSERT INTO `keys` (`id`, `user1key`, `user2key`, `user1ip`) VALUES (?, ?, ?, ?)");
			$query->bind_param("ssss", $id, $key, $user2key, $ip);
			$query->execute();
			$query->close();
			
			return $id;
		}
	}
	
	function AddUser2Key($key, $id)
	{
		if(strlen($id) == 0) { $this->errormsg = 1; return false; }
		elseif(strlen($id) > 10) { $this->errormsg = 2; return false; }
		elseif(strlen($id) < 10) { $this->errormsg = 3; return false; }
		elseif(strlen($key) == 0) { $this->errormsg = 4; return false; }
		elseif(strlen($key) < 10) { $this->errormsg = 5; return false; }
		elseif(strlen($key) > 4294967295) { $this->errormsg = 6; return false; }
		else
		{
			$query = $this->mysqli->prepare("SELECT `user2key` FROM `keys` WHERE `id`=?");
			$query->bind_param("s", $id);
			$query->bind_result($user2key);
			$query->execute();
			$query->store_result();
			$count = $query->num_rows;
			$query->fetch();
			$query->close();
			
			if($count == 0)
			{
				$this->errormsg = 7;
				return false;
			}
			else
			{
				if($user2key !== "None")
				{
					$this->errormsg = 8;
					return false;
				}
				else
				{
					$query = $this->mysqli->prepare("UPDATE `keys` SET `user2key`=? WHERE `id`=?");
					$query->bind_param("ss", $key, $id);
					$query->execute();
					$query->close();
					
					return true;
				}
			}
		}
	}
	
	function VerifyId($id)
	{
		if(strlen($id) == 0) { $this->errormsg = 1; return false; }
		elseif(strlen($id) > 10)  { $this->errormsg = 2; return false; }
		elseif(strlen($id) < 10) { $this->errormsg = 3; return false; }
		else
		{
			if(!$query = $this->mysqli->prepare("SELECT `user2ip` FROM `keys` WHERE `id`=?"))
			{
				$this->errormsg = $query->mysqli->error;
			}
			$query->bind_param("s", $id);
			$query->bind_result($user2ip);
			$query->execute();
			$query->store_result();
			$count = $query->num_rows;
			$query->fetch();
			
			if($count == 0)
			{		
				$this->errormsg = 4; 
				return false;
			}
			else
			{
				if($user2ip !== "0.0.0.0")
				{
					$this->errormsg = 5;
					return false;
				}
				else
				{
					return true;
				}
			}
		}
	}
	
	function VerifyIp($id)
	{
		if(strlen($id) == 0) { $this->errormsg = 1; return false; }
		elseif(strlen($id) > 10)  { $this->errormsg = 2; return false; }
		elseif(strlen($id) < 10) { $this->errormsg = 3; return false; }
		else
		{
			$ip = $_SERVER['REMOTE_ADDR'];
		
			$query = $this->mysqli->prepare("SELECT * FROM `keys` WHERE `id`=? AND `user1ip`=?");
			$query->bind_param("ss", $id, $ip);
			$query->execute();
			$query->store_result();
			$count = $query->num_rows;
			$query->close();
			
			if($count == 0)
			{
				$query = $this->mysqli->prepare("UPDATE `keys` SET `user2ip`=? WHERE `id`=?");
				$query->bind_param("ss", $ip, $id);
				$query->execute();
				$query->close();
				
				return true;
			}
			else
			{
				$this->errormsg = 4;
				return false;
			}
		}
	}
	
	function GetUser1Key($id)
	{
		if(strlen($id) == 0) { $this->errormsg = 1; return false; }
		elseif(strlen($id) > 10)  { $this->errormsg = 2; return false; }
		elseif(strlen($id) < 10) { $this->errormsg = 3; return false; }
		else
		{
			$query = $this->mysqli->prepare("SELECT `user1key` FROM `keys` WHERE `id`=?");
			$query->bind_param("s", $id);
			$query->bind_result($user1key);
			$query->execute();
			$query->store_result();
			$count = $query->num_rows;
			$query->fetch();
			$query->close();
			
			if($count == 0)
			{
				$this->errormsg = 4;
				return false;
			}
			else
			{
				return $user1key;
			}
		}
	}
	
	function GetUser2Key($id)
	{
		if(strlen($id) == 0) { $this->errormsg = 1; return false; }
		elseif(strlen($id) > 10)  { $this->errormsg = 2; return false; }
		elseif(strlen($id) < 10) { $this->errormsg = 3; return false; }
		else
		{
			$ip = $_SERVER['REMOTE_ADDR'];
		
			$query = $this->mysqli->prepare("SELECT `user1ip`,`user2key` FROM `keys` WHERE `id`=?");
			$query->bind_param("s", $id);
			$query->bind_result($user1ip, $user2key);
			$query->execute();
			$query->store_result();
			$count = $query->num_rows;
			$query->fetch();
			$query->close();
			
			if($count == 0)
			{
				$this->errormsg = 4;
				return false;
			}
			else
			{
				if($ip == $user1ip)
				{
					return $user2key;
				}
				else
				{
					$this->errormsg = 5;
					return false;
				}
			}
		}
	}
}
		

?>