Question about Server Authentication

[Steeve BARBEAU]

To try, you need the DSA key in the known_hosts file of the client and
enable both RSA and DSA in the server (normally it's this by default)
Is it possible that an OpenSSH developer which functions are used and in
which order ? Perhaps you have some documentation ?

I don't find wich function is called
after check_host_in_hostfile_by_key_or_type() returns HOST_FOUND or HOST_OK