3 namespace CoreFramework\Filter\Captcha;
5 // Import framework stuff
6 use CoreFramework\Factory\ObjectFactory;
7 use CoreFramework\Filter\BaseFilter;
8 use CoreFramework\Request\Requestable;
9 use CoreFramework\Response\Responseable;
12 * A filter for checking if value "encrypt" is set and fine
14 * @author Roland Haeder <webmaster@shipsimu.org>
16 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
17 * @license GNU GPL 3.0 or any newer version
18 * @link http://www.shipsimu.org
20 * This program is free software: you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation, either version 3 of the License, or
23 * (at your option) any later version.
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program. If not, see <http://www.gnu.org/licenses/>.
33 class CaptchaEncryptFilter extends BaseFilter implements Filterable {
35 * Protected constructor
39 protected function __construct () {
40 // Call parent constructor
41 parent::__construct(__CLASS__);
45 * Creates an instance of this filter class
47 * @return $filterInstance An instance of this filter class
49 public static final function createCaptchaEncryptFilter () {
51 $filterInstance = new CaptchaEncryptFilter();
53 // Return the instance
54 return $filterInstance;
58 * Executes the filter with given request and response objects
60 * @param $requestInstance An instance of a class with an Requestable interface
61 * @param $responseInstance An instance of a class with an Responseable interface
63 * @throws EncryptMissingException If the "encrypt" value is not set
65 public function execute (Requestable $requestInstance, Responseable $responseInstance) {
66 // Get "encrypt" string barely from the request
67 $encryptRequest = $requestInstance->getRequestElement('encrypt');
70 if (is_null($encryptRequest)) {
71 // Not found, so request is invalid
72 $requestInstance->requestIsValid(FALSE);
75 throw new EncryptMissingException($this, CryptoHelper::EXCEPTION_ENCRYPT_MISSING);
79 $encryptDecoded = base64_decode(str_replace(' ', '+', urldecode($encryptRequest)));
81 // Get a crypto helper and decrypt the string
82 $decryptedString = ObjectFactory::createObjectByConfiguredName('crypto_class')->decryptString($encryptDecoded);
84 // Is it the expected length?
85 if (strlen($decryptedString) != $this->getConfigInstance()->getConfigEntry('captcha_string_length')) {
86 // Not found, so request is invalid
87 $requestInstance->requestIsValid(FALSE);
90 throw new EncryptInvalidLengthException($this, CryptoHelper::EXCEPTION_ENCRYPT_INVALID);
93 // Write it to the request
94 $requestInstance->setRequestElement('decrypted', $decryptedString);