Is called throughout the main ewiki script to request minimum
permissions for the current $action and requested $page. This function
chains to auth_perm+ and auth_query+ plugins to do its job. This
function then just returns a boolean, stating if the permission plugin
granted access.
prev << "ewiki_auth()"
next >> "ewiki_auth_user()"

You cannot modify the ProtectedMode file, but anyhow any ideas or suggestion should as usually get filed on BugReports, UserSuggestions or even better the ProtectedMode.Discussion.