<?php

class Swift_Transport_Esmtp_Auth_XOAuth2Authenticator implements Swift_Transport_Esmtp_Authenticator
{
    /**
     * Get the name of the AUTH mechanism this Authenticator handles.
     *
     * @return string
     */
    public function getAuthKeyword()
    {
        return 'XOAUTH2';
    }

    /**
     * {@inheritdoc}
     */
    public function authenticate(Swift_Transport_SmtpAgent $agent, $email, $token)
    {
        try {
            $param = $this->constructXOAuth2Params($email, $token);
            $agent->executeCommand('AUTH XOAUTH2 '.$param."\r\n", [235]);

            return true;
        } catch (Swift_TransportException $e) {
            $agent->executeCommand("RSET\r\n", [250]);

            throw $e;
        }
    }

    /**
     * Construct the auth parameter.
     *
     * @see https://developers.google.com/google-apps/gmail/xoauth2_protocol#the_sasl_xoauth2_mechanism
     */
    protected function constructXOAuth2Params($email, $token)
    {
        return base64_encode("user=$email\1auth=Bearer $token\1\1");
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----Mzg4MTExOTkxNjQxMjMxMCA1MDUyMDc4MjMwNzQ5NzQ1IDU3NzQ0NDI0NjYzNjU0MzA=