File

mod_adhoc_blacklist/mod_adhoc_blacklist.lua @ 5185:09d6bbd6c8a4

mod_http_oauth2: Fix treatment of 'redirect_uri' parameter in code flow It's optional and the one stored in the client registration should really be used instead. RFC 6749 says an URI provided as parameter MUST be validated against the stored one but does not say how. Given that the client needs their secret to proceed, it seems fine to leave this for later.
author Kim Alvefur <zash@zash.se>
date Thu, 02 Mar 2023 22:00:42 +0100
parent 1736:efbb73851af9
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-- mod_adhoc_blacklist
--
-- http://xmpp.org/extensions/xep-0133.html#edit-blacklist
--
-- Copyright (C) 2015 Kim Alvefur
--
-- This file is MIT/X11 licensed.
--

module:depends("adhoc");
local adhoc = module:require "adhoc";
local st = require"util.stanza";
local set = require"util.set";
local dataform = require"util.dataforms";
local adhoc_inital_data = require "util.adhoc".new_initial_data_form;

local blocklist_form = dataform.new {
	title = "Editing the Blacklist";
	instructions = "Fill out this form to edit the list of entities with whom communications are disallowed.";
	{
		type = "hidden";
		name = "FORM_TYPE";
		value = "http://jabber.org/protocol/admin";
	};
	{
		type = "jid-multi";
		name = "blacklistjids";
		label = "The blacklist";
	};
}

local blocklists = module:open_store("blocklist");

local blocklist_handler = adhoc_inital_data(blocklist_form, function ()
	local blacklistjids = {};
	local blacklist = blocklists:get();
	if blacklist then
		for jid in pairs(blacklist) do
			table.insert(blacklistjids, jid);
		end
	end
	return { blacklistjids = blacklistjids };
end, function(fields, form_err)
	if form_err then
		return { status = "completed", error = { message = "Problem in submitted form" } };
	end
	local blacklistjids = set.new(fields.blacklistjids);
	local ok, err = blocklists:set(nil, blacklistjids._items);
	if ok then
		return { status = "completed", info = "Blacklist updated" };
	else
		return { status = "completed", error = { message = "Error saving blacklist: "..err } };
	end
end);

module:add_item("adhoc", adhoc.new("Edit Blacklist", "http://jabber.org/protocol/admin#edit-blacklist", blocklist_handler, "admin"));

local function is_blocked(host)
	local blacklistjids = blocklists:get();
	return blacklistjids and blacklistjids[host];
end

module:hook("route/remote", function (event)
	local origin, stanza = event.origin, event.stanza;
	if is_blocked(event.to_host) then
		if origin and stanza then
			origin.send(st.error_reply(stanza, "cancel", "not-allowed", "Communication with this domain is not allowed"));
			return true;
		end
		return false;
	end
end, 1000);


module:hook("s2s-stream-features", function (event)
	local session = event.origin;
	if is_blocked(session.from_host) then
		session:close("policy-violation");
		return false;
	end
end, 1000);

module:hook("stanza/http://etherx.jabber.org/streams:features", function (event)
	local session = event.origin;
	if is_blocked(session.to_host) then
		session:close("policy-violation");
		return true;
	end
end, 1000);