New upstream version 0.6.27
This commit is contained in:
geos_one
@@ -1,4 +1,11 @@
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<?php defined('SYSPATH') OR die('No direct access allowed.');
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<?php
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// phpcs:disable PSR1.Classes.ClassDeclaration.MissingNamespace
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// phpcs:disable PSR1.Files.SideEffects
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defined('SYSPATH') or die('No direct access allowed.');
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// phpcs:enable PSR1.Files.SideEffects
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// phpcs:disable Squiz.Classes.ValidClassName.NotCamelCaps
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/**
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* Captcha driver class.
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*
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@@ -9,219 +16,223 @@
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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abstract class Captcha_Driver {
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abstract class Captcha_Driver
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{
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// The correct Captcha challenge answer
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protected $response;
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// The correct Captcha challenge answer
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protected $response;
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// Image resource identifier and type ("png", "gif" or "jpeg")
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protected $image;
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protected $image_type = 'png';
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// Image resource identifier and type ("png", "gif" or "jpeg")
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protected $image;
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protected $image_type = 'png';
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/**
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* Constructs a new challenge.
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*
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* @return void
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*/
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public function __construct()
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{
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// Generate a new challenge
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$this->response = $this->generate_challenge();
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/**
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* Constructs a new challenge.
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*
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* @return void
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*/
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public function __construct()
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{
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// Generate a new challenge
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$this->response = $this->generate_challenge();
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// Store the correct Captcha response in a session
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Event::add('system.post_controller', array($this, 'update_response_session'));
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}
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// Store the correct Captcha response in a session
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Event::add('system.post_controller', array($this, 'update_response_session'));
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}
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/**
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* Generate a new Captcha challenge.
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*
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* @return string the challenge answer
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*/
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abstract public function generate_challenge();
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/**
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* Generate a new Captcha challenge.
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*
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* @return string the challenge answer
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*/
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abstract public function generate_challenge();
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/**
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* Output the Captcha challenge.
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*
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* @param boolean html output
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* @return mixed the rendered Captcha (e.g. an image, riddle, etc.)
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*/
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abstract public function render($html);
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/**
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* Output the Captcha challenge.
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*
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* @param boolean html output
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* @return mixed the rendered Captcha (e.g. an image, riddle, etc.)
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*/
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abstract public function render($html);
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/**
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* Stores the response for the current Captcha challenge in a session so it is available
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* on the next page load for Captcha::valid(). This method is called after controller
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* execution (in the system.post_controller event) in order not to overwrite itself too soon.
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*
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* @return void
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*/
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public function update_response_session()
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{
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Session::instance()->set('captcha_response', sha1(strtoupper($this->response)));
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}
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/**
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* Stores the response for the current Captcha challenge in a session so it is available
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* on the next page load for Captcha::valid(). This method is called after controller
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* execution (in the system.post_controller event) in order not to overwrite itself too soon.
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*
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* @return void
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*/
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public function update_response_session()
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{
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Session::instance()->set('captcha_response', sha1(strtoupper($this->response)));
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}
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/**
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* Validates a Captcha response from a user.
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*
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* @param string captcha response
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* @return boolean
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*/
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public function valid($response)
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{
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return (sha1(strtoupper($response)) === Session::instance()->get('captcha_response'));
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}
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/**
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* Validates a Captcha response from a user.
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*
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* @param string captcha response
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* @return boolean
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*/
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public function valid($response)
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{
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return (sha1(strtoupper($response)) === Session::instance()->get('captcha_response'));
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}
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/**
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* Returns the image type.
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*
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* @param string filename
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* @return string|FALSE image type ("png", "gif" or "jpeg")
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*/
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public function image_type($filename)
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{
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switch (strtolower(substr(strrchr($filename, '.'), 1))) {
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case 'png':
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return 'png';
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/**
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* Returns the image type.
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*
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* @param string filename
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* @return string|FALSE image type ("png", "gif" or "jpeg")
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*/
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public function image_type($filename)
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{
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switch (strtolower(substr(strrchr($filename, '.'), 1)))
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{
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case 'png':
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return 'png';
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case 'gif':
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return 'gif';
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case 'gif':
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return 'gif';
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case 'jpg':
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case 'jpeg':
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// Return "jpeg" and not "jpg" because of the GD2 function names
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return 'jpeg';
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case 'jpg':
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case 'jpeg':
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// Return "jpeg" and not "jpg" because of the GD2 function names
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return 'jpeg';
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default:
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return false;
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}
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}
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default:
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return FALSE;
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}
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}
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/**
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* Creates an image resource with the dimensions specified in config.
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* If a background image is supplied, the image dimensions are used.
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*
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* @throws Kohana_Exception if no GD2 support
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* @param string path to the background image file
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* @return void
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*/
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public function image_create($background = null)
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{
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// Check for GD2 support
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if (! function_exists('imagegd2')) {
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throw new Kohana_Exception('captcha.requires_GD2');
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}
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/**
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* Creates an image resource with the dimensions specified in config.
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* If a background image is supplied, the image dimensions are used.
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*
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* @throws Kohana_Exception if no GD2 support
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* @param string path to the background image file
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* @return void
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*/
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public function image_create($background = NULL)
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{
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// Check for GD2 support
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if ( ! function_exists('imagegd2'))
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throw new Kohana_Exception('captcha.requires_GD2');
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// Create a new image (black)
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$this->image = imagecreatetruecolor(Captcha::$config['width'], Captcha::$config['height']);
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// Create a new image (black)
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$this->image = imagecreatetruecolor(Captcha::$config['width'], Captcha::$config['height']);
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// Use a background image
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if (! empty($background)) {
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// Create the image using the right function for the filetype
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$function = 'imagecreatefrom' . $this->image_type($background);
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$this->background_image = $function($background);
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// Use a background image
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if ( ! empty($background))
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{
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// Create the image using the right function for the filetype
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$function = 'imagecreatefrom'.$this->image_type($background);
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$this->background_image = $function($background);
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// Resize the image if needed
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if (
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imagesx($this->background_image) !== Captcha::$config['width']
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or imagesy($this->background_image) !== Captcha::$config['height']
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) {
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imagecopyresampled(
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$this->image,
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$this->background_image,
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0,
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0,
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0,
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0,
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Captcha::$config['width'],
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Captcha::$config['height'],
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imagesx($this->background_image),
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imagesy($this->background_image)
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);
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}
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// Resize the image if needed
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if (imagesx($this->background_image) !== Captcha::$config['width']
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OR imagesy($this->background_image) !== Captcha::$config['height'])
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{
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imagecopyresampled
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(
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$this->image, $this->background_image, 0, 0, 0, 0,
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Captcha::$config['width'], Captcha::$config['height'],
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imagesx($this->background_image), imagesy($this->background_image)
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);
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}
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// Free up resources
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imagedestroy($this->background_image);
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}
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}
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// Free up resources
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imagedestroy($this->background_image);
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}
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}
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/**
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* Fills the background with a gradient.
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*
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* @param resource gd image color identifier for start color
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* @param resource gd image color identifier for end color
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* @param string direction: 'horizontal' or 'vertical', 'random' by default
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* @return void
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*/
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public function image_gradient($color1, $color2, $direction = null)
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{
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$directions = array('horizontal', 'vertical');
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/**
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* Fills the background with a gradient.
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*
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* @param resource gd image color identifier for start color
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* @param resource gd image color identifier for end color
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* @param string direction: 'horizontal' or 'vertical', 'random' by default
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* @return void
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*/
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public function image_gradient($color1, $color2, $direction = NULL)
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{
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$directions = array('horizontal', 'vertical');
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// Pick a random direction if needed
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if (! in_array($direction, $directions)) {
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$direction = $directions[array_rand($directions)];
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// Pick a random direction if needed
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if ( ! in_array($direction, $directions))
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{
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$direction = $directions[array_rand($directions)];
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// Switch colors
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if (mt_rand(0, 1) === 1) {
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$temp = $color1;
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$color1 = $color2;
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$color2 = $temp;
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}
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}
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// Switch colors
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if (mt_rand(0, 1) === 1)
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{
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$temp = $color1;
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$color1 = $color2;
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$color2 = $temp;
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}
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}
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// Extract RGB values
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$color1 = imagecolorsforindex($this->image, $color1);
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$color2 = imagecolorsforindex($this->image, $color2);
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// Extract RGB values
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$color1 = imagecolorsforindex($this->image, $color1);
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$color2 = imagecolorsforindex($this->image, $color2);
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// Preparations for the gradient loop
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$steps = ($direction === 'horizontal') ? Captcha::$config['width'] : Captcha::$config['height'];
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// Preparations for the gradient loop
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$steps = ($direction === 'horizontal') ? Captcha::$config['width'] : Captcha::$config['height'];
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$r1 = ($color1['red'] - $color2['red']) / $steps;
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$g1 = ($color1['green'] - $color2['green']) / $steps;
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$b1 = ($color1['blue'] - $color2['blue']) / $steps;
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$r1 = ($color1['red'] - $color2['red']) / $steps;
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$g1 = ($color1['green'] - $color2['green']) / $steps;
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$b1 = ($color1['blue'] - $color2['blue']) / $steps;
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if ($direction === 'horizontal') {
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$x1 =& $i;
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$y1 = 0;
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$x2 =& $i;
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$y2 = Captcha::$config['height'];
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} else {
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$x1 = 0;
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$y1 =& $i;
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$x2 = Captcha::$config['width'];
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$y2 =& $i;
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}
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if ($direction === 'horizontal')
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{
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$x1 =& $i;
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$y1 = 0;
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$x2 =& $i;
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$y2 = Captcha::$config['height'];
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}
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else
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{
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$x1 = 0;
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$y1 =& $i;
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$x2 = Captcha::$config['width'];
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$y2 =& $i;
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}
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// Execute the gradient loop
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for ($i = 0; $i <= $steps; $i++) {
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$r2 = $color1['red'] - floor($i * $r1);
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$g2 = $color1['green'] - floor($i * $g1);
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$b2 = $color1['blue'] - floor($i * $b1);
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$color = imagecolorallocate($this->image, $r2, $g2, $b2);
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// Execute the gradient loop
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for ($i = 0; $i <= $steps; $i++)
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{
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$r2 = $color1['red'] - floor($i * $r1);
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$g2 = $color1['green'] - floor($i * $g1);
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$b2 = $color1['blue'] - floor($i * $b1);
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$color = imagecolorallocate($this->image, $r2, $g2, $b2);
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imageline($this->image, $x1, $y1, $x2, $y2, $color);
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}
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}
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imageline($this->image, $x1, $y1, $x2, $y2, $color);
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}
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}
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/**
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* Returns the img html element or outputs the image to the browser.
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*
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* @param boolean html output
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* @return mixed html string or void
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*/
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public function image_render($html)
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{
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// Output html element
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if ($html) {
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return '<img alt="Captcha" src="' .
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url::site('captcha/' . Captcha::$config['group']) .
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'" width="' . Captcha::$config['width'] .
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'" height="' . Captcha::$config['height'] . '" />';
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}
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/**
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* Returns the img html element or outputs the image to the browser.
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*
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* @param boolean html output
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* @return mixed html string or void
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*/
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public function image_render($html)
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{
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// Output html element
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if ($html)
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return '<img alt="Captcha" src="'.url::site('captcha/'.Captcha::$config['group']).'" width="'.Captcha::$config['width'].'" height="'.Captcha::$config['height'].'" />';
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// Send the correct HTTP header
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header('Content-Type: image/' . $this->image_type);
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// Send the correct HTTP header
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header('Content-Type: image/'.$this->image_type);
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// Pick the correct output function
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$function = 'image' . $this->image_type;
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$function($this->image);
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// Pick the correct output function
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$function = 'image'.$this->image_type;
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$function($this->image);
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// Free up resources
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imagedestroy($this->image);
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}
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} // End Captcha Driver
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// Free up resources
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imagedestroy($this->image);
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}
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}
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// End Captcha Driver
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Reference in New Issue
Block a user