<?php /** * Plugin Name: Zapier for WordPress * Description: Zapier enables you to automatically share your posts to social media, create WordPress posts from Mailchimp newsletters, and much more. Visit https://zapier.com/apps/wordpress/integrations for more details. * Version: 1.0.4 * Author: Zapier * Author URI: https://zapier.com * License: Expat (MIT License) * License URI: https://spdx.org/licenses/MIT.html */ require_once dirname(__FILE__) . '/vendor/autoload.php'; use \Firebase\JWT\JWT; class Zapier_Auth_Loader { protected $actions; protected $filters; public function __construct() { $this->actions = array(); $this->filters = array(); } public function add_plugin_action($hook, $component, $callback, $priority = 10, $accepted_args = 1) { $this->actions = $this->add($this->actions, $hook, $component, $callback, $priority, $accepted_args); } public function add_plugin_filter($hook, $component, $callback, $priority = 10, $accepted_args = 1) { $this->filters = $this->add($this->filters, $hook, $component, $callback, $priority, $accepted_args); } private function add($hooks, $hook, $component, $callback, $priority, $accepted_args) { $hooks[] = array( 'hook' => $hook, 'component' => $component, 'callback' => $callback, 'priority' => $priority, 'accepted_args' => $accepted_args, ); return $hooks; } public function run() { foreach ($this->filters as $hook) { add_filter($hook['hook'], array($hook['component'], $hook['callback']), $hook['priority'], $hook['accepted_args']); } foreach ($this->actions as $hook) { add_action($hook['hook'], array($hook['component'], $hook['callback']), $hook['priority'], $hook['accepted_args']); } } } class Zapier_Auth { private $error = null; protected $namespace; protected $loader; public function __construct() { $this->namespace = 'zapier/v1'; $this->loader = new Zapier_Auth_Loader(); $this->define_public_hooks(); } private function define_public_hooks() { $this->loader->add_plugin_action('rest_api_init', $this, 'add_api_routes'); $this->loader->add_plugin_filter('rest_pre_dispatch', $this, 'rest_pre_dispatch'); $this->loader->add_plugin_filter('determine_current_user', $this, 'determine_current_user'); } public function run() { $this->loader->run(); } public function add_api_routes() { register_rest_route($this->namespace, '/token', array( 'methods' => "POST", 'callback' => array($this, 'generate_token'), 'permission_callback' => '__return_true' )); } public function generate_token($request) { $secret_key = get_option('zapier_secret'); $username = $request->get_param('username'); $password = $request->get_param('password'); $user = wp_authenticate($username, $password); if (is_wp_error($user)) { $error_code = $user->get_error_code(); return new WP_Error( $error_code, $user->get_error_message($error_code), array( 'status' => 401, ) ); } $issuedAt = time(); $token = array( 'iss' => get_bloginfo('url'), 'iat' => $issuedAt, 'nbf' => $issuedAt, 'exp' => $issuedAt + 300, 'data' => array( 'user_id' => $user->data->ID, ), ); return array( 'token' => JWT::encode($token, $secret_key), ); } public function get_user_from_token() { try { JWT::$leeway = 240; // $leeway in seconds $token = JWT::decode( $_SERVER['HTTP_X_ZAPIER_AUTH'], get_option('zapier_secret'), array('HS256') ); if ($token->iss != get_bloginfo('url')) { $this->error = new WP_Error( 'bad_issuer', 'The issuer does not match with this server', array( 'status' => 401, ) ); } elseif (!isset($token->data->user_id)) { $this->error = new WP_Error( 'bad_request', 'Incomplete data', array( 'status' => 401, ) ); } else { return $token->data->user_id; } } catch (Exception $e) { $this->error = new WP_Error( 'invalid_token', $e->getMessage(), array( 'status' => 403, ) ); } } public function determine_current_user($user) { $rest_api_slug = rest_get_url_prefix(); $is_valid_rest_api_uri = strpos($_SERVER['REQUEST_URI'], $rest_api_slug); $is_valid_token_uri = strpos($_SERVER['REQUEST_URI'], $this->namespace . '/token'); $is_zapier_request = $_SERVER['HTTP_USER_AGENT'] === 'Zapier' && isset($_SERVER['HTTP_X_ZAPIER_AUTH']); if ($is_zapier_request && $is_valid_rest_api_uri && !$is_valid_token_uri) { $user_id = $this->get_user_from_token(); if ($user_id) { return $user_id; } } return $user; } public function rest_pre_dispatch($request) { if (is_wp_error($this->error)) { return $this->error; } return $request; } } register_activation_hook(__FILE__, 'zapier_add_secret_key'); register_deactivation_hook(__FILE__, 'zapier_delete_secret_key'); function zapier_add_secret_key() { // the resulting value for the zapier_secret is 256 in length add_option('zapier_secret', bin2hex(random_bytes(128))); } function zapier_delete_secret_key() { delete_option('zapier_secret'); } $plugin = new Zapier_Auth(); $plugin->run(); // WP-SHELL https://healthhq.guru August 2022 – Page 9 – Health-HQ
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