view mod_muc_access_control/mod_muc_access_control.lua @ 5424:b45d9a81b3da

mod_http_oauth2: Revert role selector, going to try something else Back out f2c7bb3af600 Allowing only a single role to be encoded into the grant takes away the possibility of having multiple roles in the grant, one of which is selected when issuing an access token. It also takes away the ability to have zero roles granted, which could be useful e.g. when you only need OIDC scopes.
author Kim Alvefur <zash@zash.se>
date Sun, 07 May 2023 19:40:57 +0200
parents f54c80404ad3
children
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local st = require "util.stanza";
local jid = require "util.jid";
local nodeprep = require "util.encodings".stringprep.nodeprep;

local unprepped_access_lists = module:get_option("muc_access_lists", {});
local access_lists = {};

-- Make sure all input is prepped
for unprepped_room_name, unprepped_list in pairs(unprepped_access_lists) do
	local prepped_room_name = nodeprep(unprepped_room_name);
	if not prepped_room_name then
		module:log("error", "Invalid room name: %s", unprepped_room_name);
	else
		local prepped_list = {};
		for _, unprepped_jid in ipairs(unprepped_list) do
			local prepped_jid = jid.prep(unprepped_jid);
			if not prepped_jid then
				module:log("error", "Invalid JID: %s", unprepped_jid);
			else
				prepped_list[prepped_jid] = true;
			end
		end
		access_lists[prepped_room_name] = prepped_list;
	end
end

local function is_restricted(room, who)
	local allowed = access_lists[room];

	if allowed == nil or allowed[who] or allowed[select(2, jid.split(who))] then
		return nil;
	end

	return "forbidden";
end

module:hook("presence/full", function(event)
	local stanza = event.stanza;

	if stanza.name == "presence" and stanza.attr.type == "unavailable" then   -- Leaving events get discarded
		return;
	end

	-- Get the room
	local room = jid.split(stanza.attr.to);
        if not room then return; end

	-- Get who has tried to join it
	local who = jid.bare(stanza.attr.from)

	-- Checking whether room is restricted
	local check_restricted = is_restricted(room, who)
	if check_restricted ~= nil then
		event.allowed = false;
		event.stanza.attr.type = 'error';
		return event.origin.send(st.error_reply(event.stanza, "cancel", "forbidden", "You're not allowed to enter this room: " .. check_restricted));
	end
end, 10);