<?php
/**
 *
 * This file is part of HESK - PHP Help Desk Software.
 *
 * (c) Copyright Klemen Stirn. All rights reserved.
 * https://www.hesk.com
 *
 * For the full copyright and license agreement information visit
 * https://www.hesk.com/eula.php
 *
 */

/* Check if this is a valid include */
if (!defined('IN_SCRIPT')) {die('Invalid attempt');}

class PJ_SecurityImage
{

        function __construct($key)
        {
                $this->code = '';
                $this->key = $key;
        } // End PJ_SecurityImage

        function encrypt($plain_text)
        {
            $this->code = trim(sha1($plain_text.$this->key));
        } // End encrypt

        function checkCode($mystring,$checksum)
        {
            $this->encrypt($mystring);
            if ($this->code == $checksum)
                return true;
            else
                return false;
        } // End checkCode

        function printImage($random_number)
        {
            $im = @imagecreate(150, 40) or die("Cannot Initialize new GD image stream");
            $background_color = imagecolorallocate($im, mt_rand(0,100), mt_rand(0,100), mt_rand(0,100));

			for ($i=0;$i<strlen($random_number);$i++)
			{
            	$text_color = imagecolorallocate($im, mt_rand(180,255), mt_rand(180,255), mt_rand(100,255));
				$display = substr($random_number,$i,1);
				$x = ($i*30) + mt_rand(3,16);
				$y = mt_rand(3,26);
				imagestring($im, 5, $x, $y, $display, $text_color);
			}

			if ( function_exists('imagejpeg') )
			{
				header("Content-type: image/jpeg");
				imagejpeg($im);
			}
			elseif ( function_exists('imagepng') )
			{
				header("Content-type: image/png");
				imagepng($im);
			}
			elseif ( function_exists('imagegif') )
			{
				header("Content-type: image/gif");
				imagegif($im);
			}
			else
			{
				die("GD was not compiled with JPEG or PNG support");
			}

            imagedestroy($im);
        } // End printImage

        function get()
        {
            return $this->code;
        } // End get

} // End class PJ_SecurityImage
