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-rw-r--r--plugins/muc/register.lib.lua195
1 files changed, 195 insertions, 0 deletions
diff --git a/plugins/muc/register.lib.lua b/plugins/muc/register.lib.lua
new file mode 100644
index 00000000..21cb3f2f
--- /dev/null
+++ b/plugins/muc/register.lib.lua
@@ -0,0 +1,195 @@
+local jid_bare = require "util.jid".bare;
+local jid_resource = require "util.jid".resource;
+local resourceprep = require "util.encodings".stringprep.resourceprep;
+local st = require "util.stanza";
+local dataforms = require "util.dataforms";
+
+local allow_unaffiliated = module:get_option_boolean("allow_unaffiliated_register", false);
+
+local enforce_nick = module:get_option_boolean("enforce_registered_nickname", false);
+
+-- reserved_nicks[nick] = jid
+local function get_reserved_nicks(room)
+ if room._reserved_nicks then
+ return room._reserved_nicks;
+ end
+ module:log("debug", "Refreshing reserved nicks...");
+ local reserved_nicks = {};
+ for jid in room:each_affiliation() do
+ local data = room._affiliation_data[jid];
+ local nick = data and data.reserved_nickname;
+ module:log("debug", "Refreshed for %s: %s", jid, nick);
+ if nick then
+ reserved_nicks[nick] = jid;
+ end
+ end
+ room._reserved_nicks = reserved_nicks;
+ return reserved_nicks;
+end
+
+-- Returns the registered nick, if any, for a JID
+-- Note: this is just the *nick* part, i.e. the resource of the in-room JID
+local function get_registered_nick(room, jid)
+ local registered_data = room._affiliation_data[jid];
+ if not registered_data then
+ return;
+ end
+ return registered_data.reserved_nickname;
+end
+
+-- Returns the JID, if any, that registered a nick (not in-room JID)
+local function get_registered_jid(room, nick)
+ local reserved_nicks = get_reserved_nicks(room);
+ return reserved_nicks[nick];
+end
+
+module:hook("muc-set-affiliation", function (event)
+ -- Clear reserved nick cache
+ event.room._reserved_nicks = nil;
+end);
+
+module:add_feature("jabber:iq:register");
+
+module:hook("muc-disco#info", function (event)
+ event.reply:tag("feature", { var = "jabber:iq:register" }):up();
+end);
+
+local registration_form = dataforms.new {
+ { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/muc#register" },
+ { name = "muc#register_roomnick", type = "text-single", label = "Nickname"},
+};
+
+local function enforce_nick_policy(event)
+ local origin, stanza = event.origin, event.stanza;
+ local room = assert(event.room); -- FIXME
+ if not room then return; end
+
+ -- Check if the chosen nickname is reserved
+ local requested_nick = jid_resource(stanza.attr.to);
+ local reserved_by = get_registered_jid(room, requested_nick);
+ if reserved_by and reserved_by ~= jid_bare(stanza.attr.from) then
+ module:log("debug", "%s attempted to use nick %s reserved by %s", stanza.attr.from, requested_nick, reserved_by);
+ local reply = st.error_reply(stanza, "cancel", "conflict"):up();
+ origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
+ return true;
+ end
+
+ -- Check if the occupant has a reservation they must use
+ if enforce_nick then
+ local nick = get_registered_nick(room, jid_bare(stanza.attr.from));
+ if nick then
+ if event.occupant then
+ event.occupant.nick = jid_bare(event.occupant.nick) .. "/" .. nick;
+ elseif event.dest_occupant.nick ~= jid_bare(event.dest_occupant.nick) .. "/" .. nick then
+ module:log("debug", "Attempt by %s to join as %s, but their reserved nick is %s", stanza.attr.from, requested_nick, nick);
+ local reply = st.error_reply(stanza, "cancel", "not-acceptable"):up();
+ origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
+ return true;
+ end
+ end
+ end
+end
+
+module:hook("muc-occupant-pre-join", enforce_nick_policy);
+module:hook("muc-occupant-pre-change", enforce_nick_policy);
+
+-- Discovering Reserved Room Nickname
+-- http://xmpp.org/extensions/xep-0045.html#reservednick
+module:hook("muc-disco#info/x-roomuser-item", function (event)
+ local nick = get_registered_nick(event.room, jid_bare(event.stanza.attr.from));
+ if nick then
+ event.reply:tag("identity", { category = "conference", type = "text", name = nick })
+ end
+end);
+
+local function handle_register_iq(room, origin, stanza)
+ local user_jid = jid_bare(stanza.attr.from)
+ local affiliation = room:get_affiliation(user_jid);
+ if affiliation == "outcast" then
+ origin.send(st.error_reply(stanza, "auth", "forbidden"));
+ return true;
+ elseif not (affiliation or allow_unaffiliated) then
+ origin.send(st.error_reply(stanza, "auth", "registration-required"));
+ return true;
+ end
+ local reply = st.reply(stanza);
+ local registered_nick = get_registered_nick(room, user_jid);
+ if stanza.attr.type == "get" then
+ reply:query("jabber:iq:register");
+ if registered_nick then
+ reply:tag("registered"):up();
+ reply:tag("username"):text(registered_nick);
+ origin.send(reply);
+ return true;
+ end
+ reply:add_child(registration_form:form());
+ else -- type == set -- handle registration form
+ local query = stanza.tags[1];
+ if query:get_child("remove") then
+ -- Remove "member" affiliation, but preserve if any other
+ local new_affiliation = affiliation ~= "member" and affiliation;
+ local ok, err_type, err_condition = room:set_affiliation(true, user_jid, new_affiliation, nil, false);
+ if not ok then
+ origin.send(st.error_reply(stanza, err_type, err_condition));
+ return true;
+ end
+ origin.send(reply);
+ return true;
+ end
+ local form_tag = query:get_child("x", "jabber:x:data");
+ local reg_data = form_tag and registration_form:data(form_tag);
+ if not reg_data then
+ origin.send(st.error_reply(stanza, "modify", "bad-request", "Error in form"));
+ return true;
+ end
+ -- Is the nickname valid?
+ local desired_nick = resourceprep(reg_data["muc#register_roomnick"]);
+ if not desired_nick then
+ origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid Nickname"));
+ return true;
+ end
+ -- Is the nickname currently in use by another user?
+ local current_occupant = room:get_occupant_by_nick(room.jid.."/"..desired_nick);
+ if current_occupant and current_occupant.bare_jid ~= user_jid then
+ origin.send(st.error_reply(stanza, "cancel", "conflict"));
+ return true;
+ end
+ -- Is the nickname currently reserved by another user?
+ local reserved_by = get_registered_jid(room, desired_nick);
+ if reserved_by and reserved_by ~= user_jid then
+ origin.send(st.error_reply(stanza, "cancel", "conflict"));
+ return true;
+ end
+
+ if enforce_nick then
+ -- Kick any sessions that are not using this nick before we register it
+ local required_room_nick = room.jid.."/"..desired_nick;
+ for room_nick, occupant in room:each_occupant() do
+ if occupant.bare_jid == user_jid and room_nick ~= required_room_nick then
+ room:set_role(true, room_nick, nil); -- Kick (TODO: would be nice to use 333 code)
+ end
+ end
+ end
+
+ -- Checks passed, save the registration
+ if registered_nick ~= desired_nick then
+ local registration_data = { reserved_nickname = desired_nick };
+ local ok, err_type, err_condition = room:set_affiliation(true, user_jid, affiliation or "member", nil, registration_data);
+ if not ok then
+ origin.send(st.error_reply(stanza, err_type, err_condition));
+ return true;
+ end
+ module:log("debug", "Saved nick registration for %s: %s", user_jid, desired_nick);
+ origin.send(reply);
+ return true;
+ end
+ end
+ origin.send(reply);
+ return true;
+end
+
+return {
+ get_registered_nick = get_registered_nick;
+ get_registered_jid = get_registered_jid;
+ handle_register_iq = handle_register_iq;
+}