mod_http_oauth2: Strip unknown extra fields from client registration We shouldn't sign things we don't understand! RFC 7591 section-2 states: > The authorization server MUST ignore any client metadata sent by the > client that it does not understand (for instance, by silently removing > unknown metadata from the client's registration record during > processing). Prevents grandfathering in of unvalidated data that might become used later, especially since the 'additionalProperties' schema keyword was removed in 698fef74ce53

local jid = require "util.jid";
local st = require "util.stanza";

local nick_patterns = module:get_option_array("muc_reserve_nick_patterns", {});

module:hook("muc-occupant-pre-join", function (event)
	local nick = jid.resource(event.occupant.nick);
	for k, nick_pattern in pairs(nick_patterns) do
		if nick:match(nick_pattern) then
			local reply = st.error_reply(event.stanza, "modify", "conflict", "Unacceptable nickname, please try another");
			module:send(reply);
			return true;
		end
	end
end);