PHP - Swiftmailer using STARTTLS and self signed certificates

Question

I'm trying to send an email with php and swiftmailer, using STARTTLS, but I'm getting a certificate error. I have root access to the SMTP server, and the certificate used is self-signed. I'm using Debian on both machines (web server and smtp server)

PHP message: PHP Warning: stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed in [..]/lib/classes/Swift/Transport/StreamBuffer.php on line 97 PHP message: PHP Fatal error: Uncaught exception 'Swift_TransportException' with message 'Unable to connect with TLS encryption' in [..]/lib/classes/Swift/Transport/EsmtpTransport.php:294

Do I need to add my own certificate somewhere to get it accepted? Or is this some OpenSSL configuration error?

Answer 1

Swiftmailer has now been updated to include an option for this. It can now be solved using the setStreamOptions method from your Swift_SmtpTransport instance rather than editing the swift class.

$transport = Swift_SmtpTransport::newInstance('smtp.server.com', 123, 'tls')
    ->setUsername('username')
    ->setPassword('password')
    ->setStreamOptions(array('ssl' => array('allow_self_signed' => true, 'verify_peer' => false)));