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<?php |
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|
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/** |
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* @copyright © Melograno Venture Studio. All rights reserved. |
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* @licence See COPYING.md for license details. |
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*/ |
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|
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namespace IvyForms\Services\Security\HCaptcha; |
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|
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// phpcs:disable PSR1.Files.SideEffects |
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if (!defined('ABSPATH')) { |
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exit; // Exit if accessed directly |
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} |
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|
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use IvyForms\Common\Exceptions\ForbiddenException; |
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use IvyForms\Services\Security\Common\CaptchaServiceInterface; |
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use IvyForms\Services\Security\Common\IpDetectionService; |
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use IvyForms\Services\Settings\SettingsService; |
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use IvyForms\Services\Translations\BackendStrings; |
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|
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/** |
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* Class HCaptchaService |
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* |
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* @package IvyForms\Services\Security |
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*/ |
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class HCaptchaService implements CaptchaServiceInterface |
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{ |
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private const HCAPTCHA_VERIFY_URL = 'https://hcaptcha.com/siteverify'; |
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private const HCAPTCHA_SCRIPT_URL = 'https://js.hcaptcha.com/1/api.js'; |
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|
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private SettingsService $settingsService; |
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|
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public function __construct(SettingsService $settingsService) |
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{ |
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$this->settingsService = $settingsService; |
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} |
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|
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/** |
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* Verify hCaptcha response with hCaptcha API |
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* |
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* @param string $response The hCaptcha response token |
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* @param string $secretKey The secret key |
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* @param string $type The hCaptcha type (checkbox, invisible) |
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* @param string $userIp Optional user IP address |
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* @return bool |
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*/ |
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public function verify(string $response, string $secretKey, string $type = 'checkbox', string $userIp = ''): bool |
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{ |
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if (empty($response) || empty($secretKey)) { |
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return false; |
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} |
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|
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$verificationResult = $this->callHCaptchaApi($response, $secretKey, $userIp); |
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|
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if (!$verificationResult) { |
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return false; |
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} |
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|
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return $verificationResult['success'] === true; |
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} |
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|
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/** |
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* Call hCaptcha API for verification |
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* |
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* @param string $response |
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* @param string $secretKey |
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* @param string $userIp |
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* @return array<string, mixed>|false |
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*/ |
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private function callHCaptchaApi(string $response, string $secretKey, string $userIp = '') |
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{ |
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$settings = $this->getSettings(); |
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$siteKey = $settings['siteKey'] ?? ''; |
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|
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$postData = [ |
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'secret' => $secretKey, |
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'response' => $response, |
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]; |
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|
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if (!empty($userIp)) { |
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$postData['remoteip'] = $userIp; |
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} |
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|
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if (!empty($siteKey)) { |
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$postData['sitekey'] = $siteKey; |
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} |
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|
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$args = [ |
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'body' => $postData, |
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'method' => 'POST', |
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'timeout' => 15, |
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'headers' => [ |
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'Content-Type' => 'application/x-www-form-urlencoded', |
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], |
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]; |
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|
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$response = wp_remote_post(self::HCAPTCHA_VERIFY_URL, $args); |
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|
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if (is_wp_error($response)) { |
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error_log(sprintf( |
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BackendStrings::getExceptionStrings()['hcaptcha_error_verification'], |
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$response->get_error_message() |
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)); |
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return false; |
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} |
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|
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$responseCode = wp_remote_retrieve_response_code($response); |
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if ($responseCode !== 200) { |
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error_log(sprintf( |
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BackendStrings::getExceptionStrings()['hcaptcha_error_http_code'], |
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$responseCode |
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)); |
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return false; |
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} |
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|
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$body = wp_remote_retrieve_body($response); |
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$result = json_decode($body, true); |
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|
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if (json_last_error() !== JSON_ERROR_NONE) { |
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error_log(BackendStrings::getExceptionStrings()['hcaptcha_error_invalid_json']); |
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return false; |
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} |
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|
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return $result; |
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} |
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|
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/** |
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* Get the appropriate hCaptcha script URL |
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* |
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* @param string $type The hCaptcha type (checkbox, invisible) |
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* @param string $siteKey The site key |
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* @return string The complete script URL |
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*/ |
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public function getScriptUrl(string $type, string $siteKey, string $language = 'auto'): string |
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{ |
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return self::HCAPTCHA_SCRIPT_URL . '?render=explicit&onload=onHCaptchaLoad'; |
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} |
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|
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/** |
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* Get hCaptcha configuration for frontend |
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* |
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* @param string $type |
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* @param string $siteKey |
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* @return array<string, mixed> |
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*/ |
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public function getFrontendConfig(string $type, string $siteKey): array |
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{ |
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return [ |
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'type' => $type, |
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'siteKey' => $siteKey, |
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'scriptUrl' => $this->getScriptUrl($type, $siteKey), |
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]; |
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} |
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|
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/** |
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* Validate hCaptcha credentials with hCaptcha API |
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* |
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* @param string $siteKey The site key to validate |
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* @param string $secretKey The secret key to validate |
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* @return array{success: bool, message: string} |
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*/ |
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public function validateCredentials(string $siteKey, string $secretKey): array |
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{ |
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// Basic format validation first |
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if (empty($siteKey) || empty($secretKey)) { |
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return [ |
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'success' => false, |
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'message' => BackendStrings::getExceptionStrings()['hcaptcha_keys_incomplete'], |
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]; |
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} |
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|
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// hCaptcha keys validation - check format |
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if (!$this->isValidKeyFormat($siteKey, 'site') || !$this->isValidKeyFormat($secretKey, 'secret')) { |
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return [ |
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'success' => false, |
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'message' => BackendStrings::getExceptionStrings()['hcaptcha_invalid_key_format'], |
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]; |
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} |
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|
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// Note: Unlike reCAPTCHA, hCaptcha doesn't provide a simple credentials validation endpoint |
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// We can only verify the format here. Actual validation happens during form submission. |
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return [ |
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'success' => true, |
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'message' => BackendStrings::getExceptionStrings()['hcaptcha_keys_valid'], |
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]; |
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} |
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|
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/** |
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* Validate hCaptcha key format |
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* |
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* hCaptcha keys typically follow these formats: |
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* - Site keys: UUID-like format (e.g., 10000000-ffff-ffff-ffff-000000000001) |
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* - Secret keys: "0x" followed by 38-40 hex characters (40-42 chars total) |
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* |
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* @param string $key |
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* @param string $keyType Either 'site' or 'secret' |
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* @return bool |
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*/ |
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private function isValidKeyFormat(string $key, string $keyType = 'site'): bool |
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{ |
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if ($keyType === 'site') { |
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// Site keys are UUID-like: 8-4-4-4-12 hex characters separated by hyphens |
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$pattern = '/^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-' |
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. '[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$/'; |
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return preg_match($pattern, $key) === 1; |
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} |
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// Secret keys start with "0x" followed by hex characters (40-42 chars total) |
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return preg_match('/^0x[0-9a-fA-F]{38,40}$/', $key) === 1; |
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} |
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|
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/** |
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* Check if hCaptcha is configured |
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* |
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* @return bool |
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*/ |
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public function isConfigured(): bool |
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{ |
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$settings = $this->getSettings(); |
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|
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return !empty($settings['siteKey']) && !empty($settings['secretKey']); |
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} |
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|
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/** |
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* Get site key from settings |
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* |
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* @return string |
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*/ |
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public function getSiteKey(): string |
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{ |
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$settings = $this->getSettings(); |
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return $settings['siteKey'] ?? ''; |
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} |
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|
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/** |
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* Get hCaptcha type from settings |
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* |
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* @return string |
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*/ |
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public function getType(): string |
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{ |
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$settings = $this->getSettings(); |
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return $settings['type'] ?? 'checkbox'; |
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} |
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|
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/** |
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* Get hCaptcha settings |
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* |
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* @return array<string, mixed> |
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*/ |
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public function getSettings(): array |
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{ |
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try { |
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return $this->settingsService->getSetting('security', 'hcaptcha') ?? []; |
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} catch (\Exception $e) { |
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error_log(sprintf( |
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BackendStrings::getExceptionStrings()['hcaptcha_error_loading_settings'], |
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$e->getMessage() |
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)); |
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return []; |
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} |
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} |
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|
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/** |
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* Validate form submission with hCaptcha |
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* |
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* @param array<string, mixed> $submissionData The form submission data |
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* @param array<object> $formFields The form field objects |
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* @return bool |
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* @throws ForbiddenException |
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*/ |
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public function validateFormSubmission(array $submissionData, array $formFields): bool |
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{ |
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// Find hCaptcha field in the form |
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$hcaptchaFieldInfo = $this->findHCaptchaField($formFields); |
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|
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// If no hCaptcha field, skip validation |
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if (!$hcaptchaFieldInfo['hasField']) { |
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return true; |
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} |
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|
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// Check if hCaptcha is configured |
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if (!$this->isConfigured()) { |
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throw new ForbiddenException( |
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BackendStrings::getExceptionStrings()['hcaptcha_not_configured'] |
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); |
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} |
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|
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// Get and validate hCaptcha token |
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$hcaptchaToken = $this->extractHCaptchaToken($submissionData, $hcaptchaFieldInfo['fieldKey']); |
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|
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// Perform validation |
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return $this->performTokenValidation($hcaptchaToken); |
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} |
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|
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/** |
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* Find hCaptcha field in form fields |
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* |
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* @param array<object> $formFields |
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* @return array{hasField: bool, fieldKey: string} |
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*/ |
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private function findHCaptchaField(array $formFields): array |
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{ |
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foreach ($formFields as $field) { |
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if ($field->getType() === 'hcaptcha') { |
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return [ |
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'hasField' => true, |
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'fieldKey' => 'hcaptcha_' . $field->getIndex() |
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]; |
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} |
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} |
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|
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return ['hasField' => false, 'fieldKey' => '']; |
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} |
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|
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/** |
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* Extract hCaptcha token from submission data |
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* |
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* @param array<string, mixed> $submissionData |
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* @param string $fieldKey |
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* @return string |
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* @throws ForbiddenException If token is missing |
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*/ |
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private function extractHCaptchaToken(array $submissionData, string $fieldKey): string |
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{ |
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$hcaptchaToken = $submissionData['values'][$fieldKey] ?? ''; |
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|
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if (empty($hcaptchaToken)) { |
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throw new ForbiddenException( |
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BackendStrings::getExceptionStrings()['hcaptcha_response_required'] |
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); |
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} |
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|
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return $hcaptchaToken; |
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} |
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|
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/** |
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* Perform token validation with hCaptcha API |
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* |
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* @param string $hcaptchaToken |
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* @return bool |
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* @throws ForbiddenException If validation fails |
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*/ |
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private function performTokenValidation(string $hcaptchaToken): bool |
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{ |
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// Get settings |
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$settings = $this->getSettings(); |
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$secretKey = $settings['secretKey'] ?? ''; |
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$type = $settings['type'] ?? 'checkbox'; |
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|
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// Get user IP |
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$userIp = IpDetectionService::getUserIpAddress(); |
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|
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// Verify with hCaptcha |
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$isValid = $this->verify($hcaptchaToken, $secretKey, $type, $userIp); |
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|
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if (!$isValid) { |
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if (defined('WP_DEBUG') && WP_DEBUG) { |
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error_log(sprintf( |
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BackendStrings::getExceptionStrings()['hcaptcha_error_validation_failed'], |
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substr($hcaptchaToken, 0, 20) . '...' |
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)); |
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} |
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throw new ForbiddenException( |
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BackendStrings::getExceptionStrings()['hcaptcha_verification_failed'] |
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); |
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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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/** |
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* Validate hCaptcha response (main validation method) |
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* |
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* @param string $response |
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* @param string $userIp |
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* @return bool |
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*/ |
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public function validateResponse(string $response, string $userIp = ''): bool |
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{ |
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if (!$this->isConfigured()) { |
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return true; // If not configured, pass validation |
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} |
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|
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$settings = $this->getSettings(); |
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|
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return $this->verify( |
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$response, |
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$settings['secretKey'], |
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$settings['type'] ?? 'checkbox', |
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$userIp |
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); |
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} |
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|
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/** |
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* Validate settings for hCaptcha |
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* |
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* @param array<string, mixed> $settings The settings to validate |
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* @return array{success: bool, message: string} |
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*/ |
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public function validateSettings(array $settings): array |
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{ |
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// Validate required fields |
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if (!isset($settings['siteKey']) || !isset($settings['secretKey'])) { |
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return [ |
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'success' => false, |
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'message' => BackendStrings::getExceptionStrings()['hcaptcha_keys_incomplete'], |
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]; |
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} |
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|
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// Validate credentials |
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return $this->validateCredentials($settings['siteKey'], $settings['secretKey']); |
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} |
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} |
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|
