+++ /dev/null
-<?php
-/**
- * A solveable graphical code CAPTCHA
- *
- * @author Roland Haeder <webmaster@shipsimu.org>
- * @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2015 Core Developer Team
- * @license GNU GPL 3.0 or any newer version
- * @link http://www.shipsimu.org
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 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 more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-class GraphicalCodeCaptcha extends BaseCaptcha implements SolveableCaptcha {
- /**
- * Hash of the CAPTCHA string
- */
- private $hashedString = '';
-
- /**
- * Encrypted string
- */
- private $encryptedString = '';
-
- /**
- * Protected constructor
- *
- * @return void
- */
- protected function __construct () {
- // Call parent constructor
- parent::__construct(__CLASS__);
- }
-
- /**
- * Creates an instance of this captcha class
- *
- * @param $helperInstance An instance of a helper class
- * @param $extraInstance An extra instance, just for better hash data
- * @return $captchaInstance An instance of this captcha class
- */
- public static final function createGraphicalCodeCaptcha (HelpableTemplate $helperInstance, FrameworkInterface $extraInstance = NULL) {
- // Get a new instance
- $captchaInstance = new GraphicalCodeCaptcha();
-
- // Set template instance
- $captchaInstance->setHelperInstance($helperInstance);
-
- // Initialize the RNG
- $captchaInstance->initializeRandomNumberGenerator($extraInstance);
-
- // Return the instance
- return $captchaInstance;
- }
-
- /**
- * Initiates the CAPTCHA
- *
- * @return void
- */
- public function initiateCaptcha () {
- // Get total length
- $captchaLength = $this->getConfigInstance()->getConfigEntry('captcha_string_length');
-
- // Get max string length
- $strLength = $this->getConfigInstance()->getConfigEntry('random_string_length');
-
- // Calculate starting position based on random place
- $start = $this->getRngInstance()->randomNumber(0, ($strLength - $captchaLength));
-
- // Test it
- assert($start >= 0);
-
- // Generate a random string for confirmation
- $randomString = $this->getRngInstance()->randomString($strLength);
-
- // Encode the string with BASE64
- $base64String = base64_encode($randomString);
-
- // Make this string a bit more readable for humans
- $captchaString = substr($base64String, $start, $captchaLength);
-
- // Get all characters we want to replace
- $searchChars = $this->getConfigInstance()->getConfigEntry('captcha_search_chars');
-
- // Get fixed salt and use it as "replacement characters"
- $replaceChars = $this->getRngInstance()->getExtraSalt();
-
- // Remove any plus, equals or slashes
- for ($searchIdx = 0; $searchIdx < strlen($searchChars); $searchIdx++) {
- // Get search character
- $search = substr($searchChars, $searchIdx, 1);
-
- // Random array index
- $charIdx = $this->getRngInstance()->randomNumber(0, (strlen($replaceChars) - 1));
-
- // Get replacement
- $replace = substr($replaceChars, $charIdx, 1);
-
- // Replace character
- $captchaString = str_replace($search, $replace, $captchaString, $captchaLength);
- } // END - foreach
-
- // Get crypto instance
- $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
-
- // Hash the CAPTCHA code for later comparison
- $this->hashedString = $cryptoInstance->hashString($captchaString);
-
- // Encrypt the string for later usage
- $this->encryptedString = $cryptoInstance->encryptString($captchaString);
- }
-
- /**
- * Render the CAPTCHA code
- *
- * @return void
- */
- public function renderCode () {
- // Get helper instance
- $helperInstance = $this->getHelperInstance();
-
- // Get template instance
- $templateInstance = $helperInstance->getTemplateInstance();
-
- // Load a template for this CAPTCHA
- $templateInstance->loadCodeTemplate('captch_graphic_code');
-
- // Rename variable
- $templateInstance->renameVariable('captcha_code', $helperInstance->getFormName() . '_captcha');
- $templateInstance->renameVariable('captcha_hash', $helperInstance->getFormName() . '_hash');
- $templateInstance->renameVariable('encrypted_code', $helperInstance->getFormName() . '_encrypt');
-
- // Assign variables
- $templateInstance->assignVariable($helperInstance->getFormName() . '_encrypt', urlencode(base64_encode($this->encryptedString)));
- $templateInstance->assignVariable($helperInstance->getFormName() . '_hash', $this->hashedString);
-
- // Compile the template
- $templateInstance->compileTemplate();
-
- // Get the content back
- $this->addContent($templateInstance->getRawTemplateData());
- }
-}
-
-// [EOF]
-?>
projects / core.git / blobdiff