For a secret squirrel project, I’ve been diving fairly deep into SSH land. While in the process of implementing my own SSH service via Twisted.Conch, I ran into the problem of trying to figure out how to support agent forwarding.
While tracing through an SSH connection, I got the session request name ‘email@example.com’ and after grepping over the openSSH code, sure enough there’s a check for that exact request type.
Will update when/if I can figure out how to translate to Python/Twisted. In the interim, session.c can be viewed here http://anoncvs.mindrot.org/index.cgi/openssh/session.c?view=markup. In passing, I have to say this is some of the most immaculate C code I have ever seen in my life.