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<?php |
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/** |
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* Quantum PHP Framework |
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* |
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* An open source software development framework for PHP |
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* |
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* @package Quantum |
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* @author Arman Ag. <[email protected]> |
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* @copyright Copyright (c) 2018 Softberg LLC (https://softberg.org) |
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* @link http://quantum.softberg.org/ |
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* @since 2.9.0 |
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*/ |
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namespace Quantum\Libraries\Captcha\Adapters; |
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use Quantum\Libraries\Captcha\CaptchaInterface; |
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use Quantum\Libraries\Asset\AssetManager; |
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use Quantum\Libraries\Curl\HttpClient; |
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use Quantum\Exceptions\AssetException; |
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use Quantum\Exceptions\HttpException; |
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use Quantum\Exceptions\LangException; |
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use Quantum\Exceptions\AppException; |
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use Quantum\Libraries\Asset\Asset; |
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use Exception; |
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abstract class BaseCaptcha implements CaptchaInterface |
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{ |
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/** |
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* @var string |
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*/ |
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protected $siteKey; |
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/** |
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* @var string |
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*/ |
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protected $secretKey; |
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/** |
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* @var HttpClient |
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*/ |
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protected $http; |
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/** |
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* @var mixed|null |
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*/ |
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protected $type = null; |
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/** |
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* @var array |
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*/ |
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protected $errorCodes = []; |
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/** |
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* @var array |
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*/ |
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protected $elementAttributes = []; |
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/** |
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* @return string|null |
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*/ |
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public function getType(): ?string |
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{ |
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return $this->type; |
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} |
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/** |
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* @param string $type |
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* @return CaptchaInterface |
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* @throws Exception |
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*/ |
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public function setType(string $type): CaptchaInterface |
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{ |
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if (!$this->isValidCaptchaType($type)) { |
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throw new Exception('Provided captcha type is not valid'); |
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} |
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$this->type = $type; |
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return $this; |
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} |
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/** |
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* @return string |
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*/ |
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public function getName(): string |
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{ |
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return $this->name; |
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} |
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/** |
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* Generates an HTML code block for the captcha |
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* @param string $formIdentifier |
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* @param array $attributes |
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* @return string |
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* @throws AssetException |
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* @throws LangException |
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* @throws Exception |
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*/ |
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public function addToForm(string $formIdentifier = '', array $attributes = []): string |
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{ |
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if (!$this->type) { |
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throw new Exception('Captcha type is not set'); |
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} |
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AssetManager::getInstance()->registerAsset(new Asset(Asset::JS, static::CLIENT_API, 'captcha', -1, ['async', 'defer'])); |
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if (strtolower($this->type) == self::CAPTCHA_INVISIBLE) { |
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return $this->getInvisibleElement($formIdentifier); |
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} else { |
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return $this->getVisibleElement($attributes); |
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} |
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} |
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/** |
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* Checks the code given by the captcha |
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* @param string $code |
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* @return bool |
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* @throws LangException |
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* @throws ErrorException |
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* @throws AppException |
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* @throws HttpException |
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* @throws Exception |
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*/ |
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public function verify(string $code): bool |
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{ |
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if (is_null($this->secretKey)) |
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throw new Exception('The secret key is not set'); |
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if (empty($code)) { |
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$this->errorCodes = ['internal-empty-response']; |
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return false; |
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} |
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$query = [ |
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'secret' => $this->secretKey, |
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'response' => $code, |
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'remoteip' => get_user_ip() |
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]; |
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$response = $this->http |
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->createRequest(static::VERIFY_URL . '?' . http_build_query($query)) |
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->setMethod('GET') |
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->start() |
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->getResponseBody(); |
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if (empty($response)) { |
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$this->errorCodes = ['internal-empty-response']; |
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return false; |
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} |
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if (!is_object($response)) { |
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$this->errorCodes = ['invalid-input-response']; |
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return false; |
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} |
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if (isset($response->{'error-codes'}) && is_array($response->{'error-codes'})) { |
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$this->errorCodes = $response->{'error-codes'}; |
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} |
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if (isset($response->{'challenge_ts'}) && $this->detectReplayAttack($response->{'challenge_ts'})) { |
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$this->errorCodes = ['replay-attack']; |
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return false; |
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} |
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return isset($response->success) && $response->success; |
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} |
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/** |
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* @return string|null |
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*/ |
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public function getErrorMessage(): ?string |
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{ |
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if (!empty($this->errorCodes)) { |
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return current($this->errorCodes); |
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} |
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return null; |
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} |
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/** |
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* @param array $attributes |
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* @return string |
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*/ |
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protected function getVisibleElement(array $attributes = []): string |
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{ |
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$this->extractAttributes($attributes); |
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return '<div class="' . implode(' ', $this->elementClasses) . '" data-sitekey="' . $this->siteKey . '" ' . implode(' ', $this->elementAttributes) . '></div>'; |
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} |
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/** |
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* @param string $formIdentifier |
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* @return string |
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* @throws Exception |
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*/ |
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protected function getInvisibleElement(string $formIdentifier): string |
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{ |
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if (empty($formIdentifier)) { |
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throw new Exception('Form identifier is not provided to captcha element'); |
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} |
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return '<script> |
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document.addEventListener("DOMContentLoaded", function() { |
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const form = document.getElementById("' . $formIdentifier . '"); |
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const submitButton = form.querySelector("button[type=submit]"); |
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submitButton.setAttribute("data-sitekey", "' . $this->siteKey . '"); |
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submitButton.setAttribute("data-callback", "onSubmit"); |
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submitButton.classList.add("' . reset($this->elementClasses) . '"); |
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}) |
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function onSubmit (){ |
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document.getElementById("' . $formIdentifier . '").submit(); |
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} |
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</script>'; |
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} |
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/** |
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* @param $type |
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* @return bool |
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*/ |
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protected function isValidCaptchaType($type): bool |
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{ |
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$captchaTypes = [ |
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self::CAPTCHA_VISIBLE, |
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self::CAPTCHA_INVISIBLE |
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]; |
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return in_array($type, $captchaTypes, true); |
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} |
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/** |
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* @param array $attributes |
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* @return void |
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*/ |
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protected function extractAttributes(array $attributes) |
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{ |
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foreach ($attributes as $key => $value) { |
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if ($key == 'class') { |
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$this->elementClasses[] = $value; |
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} else { |
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$this->elementAttributes[] = $key . '="' . $value . '"'; |
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} |
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} |
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} |
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/** |
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* @param string $challengeTs |
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* @return bool |
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*/ |
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protected function detectReplayAttack(string $challengeTs): bool |
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{ |
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if (time() - strtotime($challengeTs) > self::MAX_TIME_DIFF) { |
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return true; |
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} |
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return false; |
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} |
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} |