My Guess: How ssh command works

ssh_internal_guess_psuedo

class SSHServer
  def accept?(client)
    authorized_keys.each do |public_key|
      return true if client.has?( private_key_of(public_key) ) 
    end
    return false unless permit_password_authentification
    return true if client.respond(password)
    return false
  end
end