[ale] Documentation of SSH exchange (including math)

[Alex Carver]

Hi all,

Does anyone happen to know of a site or other document that describes in 
detail (including the basic math) of the SSH2 PK authentication process? 
  All my searches describe the process of enabling PK authentication in 
the daemon and generating the keys but I'm trying to find something that 
describes the actual exchange process that identifies a user including 
the math that is used during the exchange (i.e. any intermediate 
messages being encrypted by which key, etc.)

I know there is more to the exchange than just the user's private and 
public keys to reduce the possibility of MITM and replay attacks.

If I have to I will just dig through the openssh source but I was hoping 
for something a bit more condensed.  I've got a crazy idea for a 
home-built project (once I scrape together the dollars) and I want to 
use PK authentication as part of it.