[ticket/17414] Start work on new captcha classes

PHPBB-17414

phpBB/phpbb/captcha/plugins/plugin_interface.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace phpbb\captcha\plugins;
+
+interface plugin_interface
+{
+	const CONFIRMATION_REGISTRATION = 1;
+	const CONFIRMATION_LOGIN = 2;
+
+	const CONFIRMATION_POST = 3;
+
+	const CONFIRMATION_REPORT = 4;
+
+
+	/**
+	 * Check if the plugin is available
+	 * @return bool True if the plugin is available, false if not
+	 */
+	public function is_available(): bool;
+
+	/**
+	 * Check if the plugin has a configuration
+	 *
+	 * @return bool True if the plugin has a configuration, false if not
+	 */
+	public function has_config(): bool;
+
+	/**
+	 * Get the name of the plugin, should be language variable
+	 *
+	 * @return string
+	 */
+	public static function get_name(): string;
+
+	/**
+	 * Display the captcha for the specified type
+	 *
+	 * @param int $type Type of captcha, should be one of the CONFIRMATION_* constants
+	 * @return void
+	 */
+	public function show(int $type): void;
+}

phpBB/phpbb/captcha/plugins/turnstile.php

@@ -0,0 +1,93 @@
+<?php
+
+namespace phpbb\captcha\plugins;
+
+class turnstile extends captcha_abstract
+{
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	public function __construct(\phpbb\config\config $config)
+	{
+		$this->config = $config;
+	}
+
+	public function is_available()
+	{
+		return ($this->config->offsetGet('captcha_turnstile_key') ?? false);
+	}
+
+	public function get_template()
+	{
+		return 'custom_captcha.html'; // Template file for displaying the CAPTCHA
+	}
+
+	public function execute()
+	{
+		// Perform any necessary initialization or setup
+	}
+
+	public function validate()
+	{
+		// Implement server-side validation logic here
+		// Example: Validate the submitted CAPTCHA value using Cloudflare API
+
+		// Your Cloudflare API credentials
+		$api_email = 'your_email@example.com';
+		$api_key = 'your_api_key';
+
+		// Cloudflare API endpoint for CAPTCHA verification
+		$endpoint = 'https://api.cloudflare.com/client/v4/captcha/validate';
+
+		// CAPTCHA data to be sent in the request
+		$data = [
+			'email' => $api_email,
+			'key' => $api_key,
+			'response' => $this->confirm_code
+		];
+
+		// Initialize cURL session
+		$ch = curl_init();
+
+		// Set cURL options
+		curl_setopt_array($ch, [
+			CURLOPT_URL => $endpoint,
+			CURLOPT_POST => true,
+			CURLOPT_POSTFIELDS => json_encode($data),
+			CURLOPT_HTTPHEADER => [
+				'Content-Type: application/json',
+				'Accept: application/json'
+			],
+			CURLOPT_RETURNTRANSFER => true
+		]);
+
+		// Execute the cURL request
+		$response = curl_exec($ch);
+
+		// Check for errors
+		if ($response === false) {
+			// Handle cURL error
+			curl_close($ch);
+			return false;
+		}
+
+		// Decode the JSON response
+		$result = json_decode($response, true);
+
+		// Check if the response indicates success
+		if (isset($result['success']) && $result['success'] === true) {
+			// CAPTCHA validation passed
+			curl_close($ch);
+			return true;
+		} else {
+			// CAPTCHA validation failed
+			curl_close($ch);
+			return false;
+		}
+	}
+
+	public function get_generator_class()
+	{
+		throw new \Exception('No generator class given.');
+	}
+}