Understanding how CodeIgniter implements TLS for SMTPS

[eluser]Unknown[/eluser]
Following up on this thread
http://ellislab.com/forums/newtopic/53/

It seems that codeigniter relies on Open SSL to implement the encryption, yet in codeigniter code I see things like SHA1.php and Encrypt.php so I am wondering if codeigniter is going to be doing this without open SSL?

I would like to bypass open SSL and just write a simple TLS library. Just enough to handle a simple SMTPS session for gmail for example. I have MD5 coded and SHA coded, so I just need to code the SSL protocol (handshake and negotiation etc) Does that code exist in codeigniter?