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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\Turnstile; |
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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 TurnstileService |
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* |
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* @package IvyForms\Services\Security |
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*/ |
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class TurnstileService implements CaptchaServiceInterface |
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{ |
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private const CLOUDFLARE_TURNSTILE_VERIFY_URL = 'https://challenges.cloudflare.com/turnstile/v0/siteverify'; |
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private const CLOUDFLARE_TURNSTILE_SCRIPT_URL = 'https://challenges.cloudflare.com/turnstile/v0/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 Turnstile response with Cloudflare |
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* |
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* @param string $response The Turnstile response token |
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* @param string $secretKey The secret key |
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* @param string $type The Turnstile type (deprecated, kept for compatibility) |
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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 = '', 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 = $this->callCloudflareApi($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 Cloudflare Turnstile 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 callCloudflareApi(string $response, string $secretKey, string $userIp = '') |
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{ |
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$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'] = $userIp; |
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} |
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|
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$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::CLOUDFLARE_TURNSTILE_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()['turnstile_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()['turnstile_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()['turnstile_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 Turnstile script URL |
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* |
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* @param string $type The Turnstile type (deprecated, kept for compatibility) |
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* @param string $siteKey The site key |
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* @param string $language Optional language code (default: 'auto') |
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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 $language = 'auto'): string |
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{ |
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$url = self::CLOUDFLARE_TURNSTILE_SCRIPT_URL . '?render=explicit'; |
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|
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if (!empty($language) && $language !== 'auto') { |
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$url .= '&hl=' . $language; |
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} |
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|
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return $url; |
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} |
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|
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/** |
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* Get Turnstile 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 $siteKey): array |
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{ |
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$settings = $this->getSettings(); |
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$theme = $settings['theme'] ?? 'auto'; |
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$language = $settings['language'] ?? 'auto'; |
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|
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return [ |
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'siteKey' => $siteKey, |
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'scriptUrl' => $this->getScriptUrl($type, $siteKey, $language), |
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'theme' => $theme, |
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'language' => $language, |
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'size' => 'normal', |
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]; |
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} |
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|
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/** |
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* Validate Turnstile credentials with Cloudflare |
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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($secretKey)) { |
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return [ |
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'success' => false, |
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'message' => BackendStrings::getExceptionStrings()['turnstile_keys_incomplete'], |
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]; |
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} |
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|
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// Turnstile keys validation - check format |
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if (!$this->isValidKeyFormat($siteKey) || !$this->isValidKeyFormat($secretKey)) { |
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return [ |
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'success' => false, |
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'message' => BackendStrings::getExceptionStrings()['turnstile_invalid_key_format'], |
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]; |
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} |
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|
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// Note: Unlike reCAPTCHA, Cloudflare Turnstile 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()['turnstile_keys_valid'], |
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]; |
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} |
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|
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/** |
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* Validate Turnstile key format |
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* |
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* Cloudflare Turnstile keys typically follow these formats: |
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* - Production keys: "0x" followed by 38 hex characters (40 chars total) |
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* - Test site keys: "1x", "2x", or "3x" followed by hex chars (26 chars total) |
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* - Test secret keys: "1x", "2x", or "3x" followed by hex chars (35 chars total) |
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* |
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* @param string $key |
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* @return bool |
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*/ |
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private function isValidKeyFormat(string $key): bool |
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{ |
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// Accept production keys (0x + 38 hex chars = 40 total) |
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// or test keys (1x/2x/3x + varying hex chars, typically 26 or 35 chars) |
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return preg_match('/^[0-3]x[0-9a-fA-F]{24,38}$/', $key) === 1; |
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} |
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|
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/** |
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* Check if Turnstile is configured |
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* |
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* @return bool |
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*/ |
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public function isConfigured(): bool |
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{ |
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$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 Turnstile type from settings |
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* Note: Turnstile type modes have been removed, this returns empty string for compatibility |
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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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return ''; |
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} |
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|
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/** |
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* Get Turnstile settings |
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* |
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* @return array<string, mixed> |
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*/ |
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private function getSettings(): array |
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{ |
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try { |
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return $this->settingsService->getSetting('security', 'turnstile') ?? []; |
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} catch (\Exception $e) { |
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error_log(sprintf( |
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BackendStrings::getExceptionStrings()['turnstile_error_loading_settings'], |
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$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 Turnstile |
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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 $formFields): bool |
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{ |
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// Find Turnstile field in the form |
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$turnstileFieldInfo = $this->findTurnstileField($formFields); |
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|
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// If no Turnstile field, skip validation |
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if (!$turnstileFieldInfo['hasField']) { |
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return true; |
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} |
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|
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// Check if Turnstile is configured |
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if (!$this->isConfigured()) { |
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throw new ForbiddenException( |
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BackendStrings::getExceptionStrings()['turnstile_not_configured'] |
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); |
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} |
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|
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// Get and validate Turnstile token |
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$turnstileToken = $this->extractTurnstileToken($submissionData, $turnstileFieldInfo['fieldKey']); |
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|
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// Perform validation |
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return $this->performTokenValidation($turnstileToken); |
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} |
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|
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/** |
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* Find Turnstile 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 findTurnstileField(array $formFields): array |
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{ |
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foreach ($formFields as $field) { |
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if ($field->getType() === 'turnstile') { |
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return [ |
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'hasField' => true, |
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'fieldKey' => 'turnstile_' . $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 Turnstile 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 extractTurnstileToken(array $submissionData, string $fieldKey): string |
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{ |
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$turnstileToken = $submissionData['values'][$fieldKey] ?? ''; |
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|
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if (empty($turnstileToken)) { |
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throw new ForbiddenException( |
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BackendStrings::getExceptionStrings()['turnstile_response_required'] |
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); |
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} |
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|
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return $turnstileToken; |
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} |
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|
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/** |
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* Perform token validation with Cloudflare API |
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* |
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* @param string $turnstileToken |
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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 $turnstileToken): bool |
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{ |
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// Get settings |
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$settings = $this->getSettings(); |
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$secretKey = $settings['secretKey'] ?? ''; |
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|
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// Get user IP |
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$userIp = IpDetectionService::getUserIpAddress(); |
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|
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// Verify with Cloudflare |
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$isValid = $this->verify($turnstileToken, $secretKey, '', $userIp); |
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|
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if (!$isValid) { |
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if (defined('WP_DEBUG') && WP_DEBUG) { |
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error_log(sprintf( |
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BackendStrings::getExceptionStrings()['turnstile_error_validation_failed'], |
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substr($turnstileToken, 0, 20) . '...' |
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)); |
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} |
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throw new ForbiddenException( |
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BackendStrings::getExceptionStrings()['turnstile_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 settings for Turnstile |
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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()['turnstile_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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|
