Signs and encrypts the current message.
Object Oriented Interface
public function doSignAndEncrypt();
This method both signs and encrypts the input message into a single PKCS encoded envelope.
Please note that the message headers, including the Sender, Recipient(s), and Subject, are not encrypted. If this is sensitive information, consider including these headers in the message body as a MIME entity, and providing other headers for the S/MIME wrapper.