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class.phpmaileroauth.php
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<?php class PHPMailerOAuth extends \PHPMailer\PHPMailer\PHPMailer { /** * The OAuth user's email address * @type string */ public $oauthUserEmail = ''; /** * The OAuth refresh token * @type string */ public $oauthRefreshToken = ''; /** * The OAuth client ID * @type string */ public $oauthClientId = ''; /** * The OAuth client secret * @type string */ public $oauthClientSecret = ''; /** * An instance of the OAuth class. * @type OAuth * @access protected */ protected $oauth = null; /** * Constructor. * @param bool $exceptions Optional. Whether to throw exceptions for errors. Default false. */ public function __construct( $exceptions = false ) { parent::__construct( $exceptions ); } /** * Get an OAuth instance to use. * @return OAuth */ public function getOAUTHInstance() { if (!is_object($this->oauth)) { /* this is the only part that differs, * we create an object of our class GmailXOAuth2 instead of the original OAuth class */ $this->oauth = new GmailXOAuth2 ( $this->oauthUserEmail, $this->oauthClientSecret, $this->oauthClientId, $this->oauthRefreshToken ); } return $this->oauth; } /** * Initiate a connection to an SMTP server. * Overrides the original smtpConnect method to add support for OAuth. * @param array $options An array of options compatible with stream_context_create() * @uses SMTP * @access public * @throws phpmailerException * @return boolean */ public function smtpConnect($options = array()) { if (is_null($this->smtp)) { $this->smtp = $this->getSMTPInstance(); } if (is_null($this->oauth)) { $this->oauth = $this->getOAUTHInstance(); } // Already connected? if ($this->smtp->connected()) { return true; } $this->smtp->setTimeout($this->Timeout); $this->smtp->setDebugLevel($this->SMTPDebug); $this->smtp->setDebugOutput($this->Debugoutput); $this->smtp->setVerp($this->do_verp); $hosts = explode(';', $this->Host); $lastexception = null; foreach ($hosts as $hostentry) { $hostinfo = array(); if (!preg_match('/^((ssl|tls):\/\/)*([a-zA-Z0-9\.-]*):?([0-9]*)$/', trim($hostentry), $hostinfo)) { // Not a valid host entry continue; } // $hostinfo[2]: optional ssl or tls prefix // $hostinfo[3]: the hostname // $hostinfo[4]: optional port number // The host string prefix can temporarily override the current setting for SMTPSecure // If it's not specified, the default value is used $prefix = ''; $secure = $this->SMTPSecure; $tls = ($this->SMTPSecure == 'tls'); if ('ssl' == $hostinfo[2] or ('' == $hostinfo[2] and 'ssl' == $this->SMTPSecure)) { $prefix = 'ssl://'; $tls = false; // Can't have SSL and TLS at the same time $secure = 'ssl'; } elseif ($hostinfo[2] == 'tls') { $tls = true; // tls doesn't use a prefix $secure = 'tls'; } //Do we need the OpenSSL extension? $sslext = defined('OPENSSL_ALGO_SHA1'); if ('tls' === $secure or 'ssl' === $secure) { //Check for an OpenSSL constant rather than using extension_loaded, which is sometimes disabled if (!$sslext) { throw new \PHPMailer\PHPMailer\Exception($this->lang('extension_missing').'openssl', self::STOP_CRITICAL); } } $host = $hostinfo[3]; $port = $this->Port; $tport = (integer)$hostinfo[4]; if ($tport > 0 and $tport < 65536) { $port = $tport; } if ($this->smtp->connect($prefix . $host, $port, $this->Timeout, $options)) { try { if ($this->Helo) { $hello = $this->Helo; } else { $hello = $this->serverHostname(); } $this->smtp->hello($hello); //Automatically enable TLS encryption if: // * it's not disabled // * we have openssl extension // * we are not already using SSL // * the server offers STARTTLS if ($this->SMTPAutoTLS and $sslext and $secure != 'ssl' and $this->smtp->getServerExt('STARTTLS')) { $tls = true; } if ($tls) { if (!$this->smtp->startTLS()) { throw new \PHPMailer\PHPMailer\Exception($this->lang('connect_host')); } // We must resend HELO after tls negotiation $this->smtp->hello($hello); } if ($this->SMTPAuth) { if (!$this->smtp->authenticate( $this->Username, $this->Password, $this->AuthType, $this->oauth ) ) { throw new \PHPMailer\PHPMailer\Exception($this->lang('authenticate')); } } return true; } catch (\PHPMailer\PHPMailer\Exception $exc) { $lastexception = $exc; $this->edebug($exc->getMessage()); // We must have connected, but then failed TLS or Auth, so close connection nicely $this->smtp->quit(); } } } // If we get here, all connection attempts have failed, so close connection hard $this->smtp->close(); // As we've caught all exceptions, just report whatever the last one was if ($this->exceptions and !is_null($lastexception)) { throw $lastexception; } return false; } }