File

+
−-- Prosody IM
+
−-- Copyright (C) 2008-2010 Matthew Wild
+
−-- Copyright (C) 2008-2010 Waqas Hussain
+
−--
+
−-- This project is MIT/X11 licensed. Please see the
+
−-- COPYING file in the source package for more information.
+
−--
+
−
+
−
+
−
+
−local st = require "util.stanza";
+
−local t_concat = table.concat;
+
−
+
−local secure_auth_only = module:get_option("c2s_require_encryption",
+
−	module:get_option("require_encryption"))
+
−	or not(module:get_option("allow_unencrypted_plain_auth"));
+
−
+
−local sessionmanager = require "core.sessionmanager";
+
−local usermanager = require "core.usermanager";
+
−local nodeprep = require "util.encodings".stringprep.nodeprep;
+
−local resourceprep = require "util.encodings".stringprep.resourceprep;
+
−
+
−module:add_feature("jabber:iq:auth");
+
−module:hook("stream-features", function(event)
+
−	local origin, features = event.origin, event.features;
+
−	if secure_auth_only and not origin.secure then
+
−		-- Sorry, not offering to insecure streams!
+
−		return;
+
−	elseif not origin.username then
+
−		features:tag("auth", {xmlns='http://jabber.org/features/iq-auth'}):up();
+
−	end
+
−end);
+
−
+
−module:hook("stanza/iq/jabber:iq:auth:query", function(event)
+
−	local session, stanza = event.origin, event.stanza;
+
−
+
−	if session.type ~= "c2s_unauthed" then
+
−		(session.sends2s or session.send)(st.error_reply(stanza, "cancel", "service-unavailable",
+
−			"Legacy authentication is only allowed for unauthenticated client connections."));
+
−		return true;
+
−	end
+
−
+
−	if secure_auth_only and not session.secure then
+
−		session.send(st.error_reply(stanza, "modify", "not-acceptable", "Encryption (SSL or TLS) is required to connect to this server"));
+
−		return true;
+
−	end
+
−
+
−	local query = stanza.tags[1];
+
−	local username = query:get_child("username");
+
−	local password = query:get_child("password");
+
−	local resource = query:get_child("resource");
+
−	if not (username and password and resource) then
+
−		local reply = st.reply(stanza);
+
−		session.send(reply:query("jabber:iq:auth")
+
−			:tag("username"):up()
+
−			:tag("password"):up()
+
−			:tag("resource"):up());
+
−	else
+
−		username, password, resource = t_concat(username), t_concat(password), t_concat(resource);
+
−		username = nodeprep(username);
+
−		resource = resourceprep(resource)
+
−		if not (username and resource) then
+
−			session.send(st.error_reply(stanza, "modify", "bad-request"));
+
−			return true;
+
−		end
+
−		if usermanager.test_password(username, session.host, password) then
+
−			-- Authentication successful!
+
−			local success, err = sessionmanager.make_authenticated(session, username);
+
−			if success then
+
−				local err_type, err_msg;
+
−				success, err_type, err, err_msg = sessionmanager.bind_resource(session, resource);
+
−				if not success then
+
−					session.send(st.error_reply(stanza, err_type, err, err_msg));
+
−					session.username, session.type = nil, "c2s_unauthed"; -- FIXME should this be placed in sessionmanager?
+
−					return true;
+
−				elseif resource ~= session.resource then -- server changed resource, not supported by legacy auth
+
−					session.send(st.error_reply(stanza, "cancel", "conflict", "The requested resource could not be assigned to this session."));
+
−					session:close(); -- FIXME undo resource bind and auth instead of closing the session?
+
−					return true;
+
−				end
+
−			end
+
−			session.send(st.reply(stanza));
+
−		else
+
−			session.send(st.error_reply(stanza, "auth", "not-authorized"));
+
−		end
+
−	end
+
−	return true;
+
−end);