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-- 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")
or 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 username = stanza.tags[1]:child_with_name("username");
local password = stanza.tags[1]:child_with_name("password");
local resource = stanza.tags[1]:child_with_name("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);
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