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<?php |
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/** |
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* antibot |
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* |
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* @category Jkphl |
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* @package Jkphl\Antibot |
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* @subpackage Jkphl\Antibot\Ports\Validators |
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* @author Joschi Kuphal <[email protected]> / @jkphl |
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* @copyright Copyright © 2018 Joschi Kuphal <[email protected]> / @jkphl |
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* @license http://opensource.org/licenses/MIT The MIT License (MIT) |
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*/ |
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/*********************************************************************************** |
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* The MIT License (MIT) |
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* |
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* Copyright © 2018 Joschi Kuphal <[email protected]> |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy of |
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* this software and associated documentation files (the "Software"), to deal in |
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* the Software without restriction, including without limitation the rights to |
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of |
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* the Software, and to permit persons to whom the Software is furnished to do so, |
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* subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS |
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR |
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER |
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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***********************************************************************************/ |
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namespace Jkphl\Antibot\Ports\Validators; |
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use Jkphl\Antibot\Domain\Antibot; |
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use Jkphl\Antibot\Infrastructure\Exceptions\HoneypotValidationException; |
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use Jkphl\Antibot\Infrastructure\Model\AbstractValidator; |
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use Jkphl\Antibot\Infrastructure\Model\InputElement; |
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use Psr\Http\Message\ServerRequestInterface; |
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/** |
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* Honeypot Validator |
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* |
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* @package Jkphl\Antibot |
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* @subpackage Jkphl\Antibot\Ports\Validators |
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*/ |
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class HoneypotValidator extends AbstractValidator |
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{ |
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/** |
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* Honeypot field names & structure |
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* |
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* @var array |
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*/ |
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protected $honeypots; |
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/** |
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* Field renderer |
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* |
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* @var \Closure |
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*/ |
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protected $renderer; |
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/** |
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* Validation order position |
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* |
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* @var int |
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*/ |
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const POSITION = 50; |
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/** |
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* Constructor |
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* |
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* @param array $honeypots Honeypot field names & structure |
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* @param \Closure $renderer Field renderer |
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*/ |
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public function __construct(array $honeypots, \Closure $renderer = null) |
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{ |
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$this->honeypots = $honeypots; |
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$this->renderer = $renderer; |
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} |
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/** |
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* Validate a request |
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* |
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* @param ServerRequestInterface $request Request |
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* @param Antibot $antibot Antibot instance |
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* |
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* @return bool Success |
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* @throws HoneypotValidationException If a honeypot was triggered |
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*/ |
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public function validate(ServerRequestInterface $request, Antibot $antibot): bool |
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{ |
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$data = array_merge($request->getQueryParams(), $request->getParsedBody()); |
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return $this->validateHoneypotsRecursive($this->honeypots, $data, $antibot); |
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} |
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/** |
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* Recursively validate honeypots |
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* |
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* @param array $honeypots Honeypot configuration |
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* @param array $data Submitted data |
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* @param Antibot $antibot Antibot instance |
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* @param null $prefix Variable prefix |
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* |
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* @return bool Success |
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* @throws HoneypotValidationException If a honeypot was triggered |
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*/ |
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protected function validateHoneypotsRecursive(array $honeypots, array $data, Antibot $antibot, $prefix = null): bool |
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{ |
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// Run through the honeypot configuration |
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foreach ($honeypots as $name => $config) { |
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if (is_array($config)) { |
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$honeypotPrefix = $prefix ? $prefix.'['.htmlspecialchars($name).']' : htmlspecialchars($name); |
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if (array_key_exists($name, $data)) { |
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$this->validateHoneypotsRecursive($config, $data[$name], $antibot, $honeypotPrefix); |
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} |
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continue; |
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} |
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// If the honeypot was submitted empty (or not submitted at all): Succeed |
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if (!array_key_exists($name, $data) || !strlen($data[$name])) { |
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continue; |
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} |
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$honeypotName = $prefix ? $prefix.'['.htmlspecialchars($name).']' : htmlspecialchars($name); |
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$antibot->getLogger()->debug('[HNPT] Triggered honeypot "'.$honeypotName.'"'); |
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throw new HoneypotValidationException( |
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sprintf(HoneypotValidationException::TRIGGERED_HONEYPOT_STR, $honeypotName), |
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HoneypotValidationException::TRIGGERED_HONEYPOT |
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); |
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} |
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return true; |
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} |
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/** |
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* Create protective form HTML |
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* |
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* @param ServerRequestInterface $request Request |
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* @param Antibot $antibot Antibot instance |
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* |
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* @return InputElement[] HMTL input elements |
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*/ |
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public function armor(ServerRequestInterface $request, Antibot $antibot): array |
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{ |
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$armor = []; |
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$this->createHoneypotsRecursive($this->honeypots, $armor); |
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return $armor; |
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} |
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/** |
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* Recursively create honeypot input elements |
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* |
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* @param array $honeypots Honeypot configuration |
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* @param array $armor Armor input elements |
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* @param null $prefix Variable prefix |
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*/ |
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protected function createHoneypotsRecursive(array $honeypots, array &$armor, $prefix = null): void |
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{ |
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// Run through the honeypot configuration |
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foreach ($honeypots as $name => $config) { |
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if (is_array($config)) { |
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$honeypotPrefix = $prefix ? $prefix.'['.htmlspecialchars($name).']' : htmlspecialchars($name); |
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$this->createHoneypotsRecursive($config, $armor, $honeypotPrefix); |
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continue; |
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} |
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$honeypotName = $prefix ? $prefix.'['.htmlspecialchars($name).']' : htmlspecialchars($name); |
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$armor[] = new InputElement([ |
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'type' => $config ?: 'text', |
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'name' => $honeypotName, |
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'value' => '' |
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], $this->renderer); |
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} |
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} |
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/** |
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* Return all serializable properties |
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* |
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* The renderer closure must be omitted in order to make the validator serializable |
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* |
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* @return array Serializable properties |
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*/ |
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public function __sleep() |
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{ |
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return ['honeypots']; |
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} |
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} |
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