includes/captcha/engine_default.php
author Dan Fuhry <dan@enanocms.org>
Thu, 02 Jun 2011 05:24:38 -0400
changeset 1342 2164d18cb10c
parent 1227 bdac73ed481e
permissions -rw-r--r--
Added database transaction API. (Untested with Postgres)
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<?php
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/*
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 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
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745200a9cc2a Fixed some upgrade bugs; added support for choosing one's own date/time formats; rebrand as 1.1.7
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 * Copyright (C) 2006-2009 Dan Fuhry
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 * captcha.php - visual confirmation system used during registration
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 *
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 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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 *
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 * This file contains code written by Paul Sohier (www.paulscripts.nl). The CAPTCHA code was ported from the phpBB Better
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 * Captcha mod, and has been released under the GPLv2 by the original author.
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 */
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/**
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 * The default CAPTCHA engine. Generates medium-strength captchas with very good performance.
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 * @package Enano
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 * @subpackage User management
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 * @copyright 2007-2008 Dan Fuhry
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 * @copyright Paul Sohier
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 */
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class captcha_engine_default extends captcha_base
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{
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	function make_image()
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	{
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		$code =& strtoupper($this->get_code());
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		/**
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			* The next part is orginnaly written by ted from mastercode.nl and modified for use in Enano.
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			**/
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		header("content-type:image/png");
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		header('Cache-control: no-cache, no-store');
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		$breedte = 320;
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		$hoogte = 60;
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		$img = imagecreatetruecolor($breedte,$hoogte);
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		$achtergrond = imagecolorallocate($img, $this->color("bg"), $this->color("bg"), $this->color("bg"));
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		imagefilledrectangle($img, 0, 0, $breedte-1, $hoogte-1, $achtergrond);
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		for($g = 0;$g < 30; $g++)
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		{
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			$t = $this->dss_rand();
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			$t = $t[0];
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			$ypos = rand(0,$hoogte);
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			$xpos = rand(0,$breedte);
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			$kleur = imagecolorallocate($img, $this->color("bgtekst"), $this->color("bgtekst"), $this->color("bgtekst"));
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			imagettftext($img, $this->size(), $this->move(), $xpos, $ypos, $kleur, $this->font(), $t);
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		} 			
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		$stukje = $breedte / (strlen($code) + 3);
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		for($j = 0;$j < strlen($code); $j++)
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		{
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			$tek = $code[$j];
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			$ypos = rand(33,43);
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			$xpos = $stukje * ($j+1);
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			$kleur2 = imagecolorallocate($img, $this->color("tekst"), $this->color("tekst"), $this->color("tekst"));
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			imagettftext($img, $this->size(), $this->move(), $xpos, $ypos, $kleur2, $this->font() , $tek);
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		}
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		imagepng($img);
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	}
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	/**
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		* Some functions :)
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		* Also orginally written by mastercode.nl
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		**/
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	/**
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		* Function to create a random color
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		* @param $type string Mode for the color
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		* @return int
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		**/
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	function color($type)
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	{
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		switch($type)
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		{
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			case "bg": 
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				$kleur = rand(224,255); 
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			break;
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			case "tekst": 
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				$kleur = rand(0,127); 
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			break;
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    92
			case "bgtekst": 
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
    93
				$kleur = rand(200,224); 
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
    94
			break;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
    95
			default: 
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
    96
				$kleur = rand(0,255); 
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
    97
			break;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
    98
		}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
    99
		return $kleur;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   100
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   101
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   102
		* Function to ranom the size
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   103
		* @return int
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   104
		**/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   105
	function size()
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   106
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   107
		$grootte = rand(14,30);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   108
		return $grootte;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   109
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   110
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   111
		* Function to random the posistion
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   112
		* @return int
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   113
		**/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   114
	function move()
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   115
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   116
		$draai = rand(-25,25);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   117
		return $draai;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   118
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   119
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   120
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   121
		* Function to return a ttf file from fonts map
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   122
		* @return string
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   123
		**/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   124
	function font()
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   125
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   126
		$f = @opendir(ENANO_ROOT . '/includes/captcha/fonts/');
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   127
		if(!$f) die('Can\'t open includes/captcha/fonts/ for reading');
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   128
		$ar = array();
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   129
		while(($file = @readdir($f)) !== false)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   130
		{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   131
			if(!in_array($file, array('.','..')) && strstr($file, '.ttf'))
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   132
			{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   133
				$ar[] = $file;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   134
			}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   135
		}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   136
		if(count($ar))
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   137
		{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   138
			shuffle($ar);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   139
			$i = rand(0,(count($ar) - 1));
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   140
			return ENANO_ROOT . '/includes/captcha/fonts/' . $ar[$i];
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   141
		}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   142
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   143
	function dss_rand()
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   144
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   145
		$val = microtime() .  mt_rand();
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   146
		$val = md5($val . 'a');
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   147
		return substr($val, 4, 16);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   148
	}
401
6ae6e387a0e3 Implemented a new CAPTCHA API; the frontend ($session->{make,get}_captcha) is API-compatible but the backend (the captcha class) is deprecated.
Dan
parents:
diff changeset
   149
}