author | Dan |
Tue, 14 Apr 2009 21:02:13 -0400 | |
changeset 909 | 94c1ff984286 |
parent 801 | eb8b23f11744 |
child 1081 | 745200a9cc2a |
permissions | -rw-r--r-- |
<?php /* * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between * Version 1.1.6 (Caoineag beta 1) * Copyright (C) 2006-2008 Dan Fuhry * captcha.php - visual confirmation system used during registration * * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details. * * This file contains code written by Paul Sohier (www.paulscripts.nl). The CAPTCHA code was ported from the phpBB Better * Captcha mod, and has been released under the GPLv2 by the original author. */ /** * The default CAPTCHA engine. Generates medium-strength captchas with very good performance. * @package Enano * @subpackage User management * @copyright 2007-2008 Dan Fuhry * @copyright Paul Sohier */ class captcha_engine_default extends captcha_base { function make_image() { $code =& strtoupper($this->get_code()); /** * The next part is orginnaly written by ted from mastercode.nl and modified for use in Enano. **/ header("content-type:image/png"); header('Cache-control: no-cache, no-store'); $breedte = 320; $hoogte = 60; $img = imagecreatetruecolor($breedte,$hoogte); $achtergrond = imagecolorallocate($img, $this->color("bg"), $this->color("bg"), $this->color("bg")); imagefilledrectangle($img, 0, 0, $breedte-1, $hoogte-1, $achtergrond); for($g = 0;$g < 30; $g++) { $t = $this->dss_rand(); $t = $t[0]; $ypos = rand(0,$hoogte); $xpos = rand(0,$breedte); $kleur = imagecolorallocate($img, $this->color("bgtekst"), $this->color("bgtekst"), $this->color("bgtekst")); imagettftext($img, $this->size(), $this->move(), $xpos, $ypos, $kleur, $this->font(), $t); } $stukje = $breedte / (strlen($code) + 3); for($j = 0;$j < strlen($code); $j++) { $tek = $code[$j]; $ypos = rand(33,43); $xpos = $stukje * ($j+1); $kleur2 = imagecolorallocate($img, $this->color("tekst"), $this->color("tekst"), $this->color("tekst")); imagettftext($img, $this->size(), $this->move(), $xpos, $ypos, $kleur2, $this->font() , $tek); } imagepng($img); } /** * Some functions :) * Also orginally written by mastercode.nl **/ /** * Function to create a random color * @param $type string Mode for the color * @return int **/ function color($type) { switch($type) { case "bg": $kleur = rand(224,255); break; case "tekst": $kleur = rand(0,127); break; case "bgtekst": $kleur = rand(200,224); break; default: $kleur = rand(0,255); break; } return $kleur; } /** * Function to ranom the size * @return int **/ function size() { $grootte = rand(14,30); return $grootte; } /** * Function to random the posistion * @return int **/ function move() { $draai = rand(-25,25); return $draai; } /** * Function to return a ttf file from fonts map * @return string **/ function font() { $f = @opendir(ENANO_ROOT . '/includes/captcha/fonts/'); if(!$f) die('Can\'t open includes/captcha/fonts/ for reading'); $ar = array(); while(($file = @readdir($f)) !== false) { if(!in_array($file, array('.','..')) && strstr($file, '.ttf')) { $ar[] = $file; } } if(count($ar)) { shuffle($ar); $i = rand(0,(count($ar) - 1)); return ENANO_ROOT . '/includes/captcha/fonts/' . $ar[$i]; } } function dss_rand() { $val = microtime() . mt_rand(); $val = md5($val . 'a'); return substr($val, 4, 16); } }