force-localhost-ca/force-localhost-ca.php at master · squarecandy/force-localhost-ca · GitHub

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<?php
/**
 * Plugin Name: Force localhost CA certificate
 * Version: 1.0
 * Author: Square Candy Design
 * Plugin URI: https://github.com/squarecandy/force-localhost-ca
 * GitHub Plugin URI: https://github.com/squarecandy/force-localhost-ca
 * Author URI: http://squarecandydesign.com
 *
 * Description: WordPress curl requests (used in wp_remote_get, etc) use a CA cert file in WP Core, not the system PHP path. Use this drop in plugin (easiest in /wp-content/mu-plugins) to fix the issue on localhost. Helpful for compatibility with local SSL certs generated by the mkcert command.
 */

/**
 * Copyright (c) 2020. All rights reserved.
 *
 * Released under the GPL license
 * http://www.opensource.org/licenses/gpl-license.php
 *
 * This is an add-on for WordPress
 * http://wordpress.org/
 *
 * **********************************************************************
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * **********************************************************************
 */

// please define your custom rootCA file path as CUSTOM_LOCAL_CA_CERT in your wp-config file
if ( ! defined( 'CUSTOM_LOCAL_CA_CERT' ) ) {
	define( 'CUSTOM_LOCAL_CA_CERT', '/Users/exampleuser/Library/Application Support/mkcert/rootCA.pem' );
}

// if you need other local TLDs other than "localhost", "local" and "test", define them in your wp-config file.
if ( ! defined( 'CUSTOM_LOCAL_CA_TLDS' ) ) {
	define( 'CUSTOM_LOCAL_CA_TLDS',
		array(
			'localhost',
			'local',
			'test',
		)
	);
}

/**
 * Replace Localhost cURL Certificates
 *
 * If the URL for an HTTP request in WordPress contains a .test
 * TLD, replace the WordPress local /certificates/ca-bundle.crt
 * with our custom location
 */
function curl_patch_http_request_args( $parsed_args, $url ) {

	// Get the URL's TLD
	$test_url = wp_parse_url( $url, PHP_URL_HOST );
	$test_tld = explode( '.', $test_url );
	$test_tld = end( $test_tld );

	// provide custom CA cert if we are on .localhost or .local URL
	if ( in_array( $test_tld, CUSTOM_LOCAL_CA_TLDS ) ) {
		$parsed_args['sslcertificates'] = CUSTOM_LOCAL_CA_CERT;
	}

	return $parsed_args;
}
add_filter( 'http_request_args', 'curl_patch_http_request_args', 99, 2 );