class Net::SSH::Config

def translate(settings)

the returned hash will have Symbols for keys.
+settings+ hash must have Strings for keys, all downcased, and
a hash of Net::SSH options. Unrecognized options are ignored. The
Given a hash of OpenSSH configuration options, converts them into 
def translate(settings)
  auth_methods = default_auth_methods.clone
  (auth_methods << 'challenge-response').uniq!
  ret = settings.each_with_object({ auth_methods: auth_methods }) do |(key, value), hash|
    translate_config_key(hash, key.to_sym, value, settings)
  end
  merge_challenge_response_with_keyboard_interactive(ret)
end