XOAuth2Authenticator.php

<?php


/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\Mailer\Transport\Smtp\Auth;

use Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport;

/**
 * Handles XOAUTH2 authentication.
 *
 * @author xu.li<AthenaLightenedMyPath@gmail.com>
 *
 * @see https://developers.google.com/google-apps/gmail/xoauth2_protocol
 */
class XOAuth2Authenticator implements AuthenticatorInterface {
    public function getAuthKeyword() : string {
        return 'XOAUTH2';
    }
    
    /**
     * @see https://developers.google.com/google-apps/gmail/xoauth2_protocol#the_sasl_xoauth2_mechanism
     */
    public function authenticate(EsmtpTransport $client) : void {
        $client->executeCommand('AUTH XOAUTH2 ' . base64_encode('user=' . $client->getUsername() . "\x01auth=Bearer " . $client->getPassword() . "\x01\x01") . "\r\n", [
            235,
        ]);
    }

}