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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 hosts = _G.hosts;
local st = require "util.stanza";
local datamanager = require "util.datamanager";
local usermanager_user_exists = require "core.usermanager".user_exists;
local usermanager_create_user = require "core.usermanager".create_user;
local usermanager_set_password = require "core.usermanager".set_password;
local usermanager_delete_user = require "core.usermanager".delete_user;
local os_time = os.time;
local nodeprep = require "util.encodings".stringprep.nodeprep;
local jid_bare = require "util.jid".bare;
local compat = module:get_option_boolean("registration_compat", true);
local allow_registration = module:get_option_boolean("allow_registration", true);
module:add_feature("jabber:iq:register");
local register_stream_feature = st.stanza("register", {xmlns="http://jabber.org/features/iq-register"}):up();
module:hook("stream-features", function(event)
local session, features = event.origin, event.features;
-- Advertise registration to unauthorized clients only.
if not(allow_registration) or session.type ~= "c2s_unauthed" then
return
end
features:add_child(register_stream_feature);
end);
local function handle_registration_stanza(event)
local session, stanza = event.origin, event.stanza;
local query = stanza.tags[1];
if stanza.attr.type == "get" then
local reply = st.reply(stanza);
reply:tag("query", {xmlns = "jabber:iq:register"})
:tag("registered"):up()
:tag("username"):text(session.username):up()
:tag("password"):up();
session.send(reply);
else -- stanza.attr.type == "set"
if query.tags[1] and query.tags[1].name == "remove" then
-- TODO delete user auth data, send iq response, kick all user resources with a <not-authorized/>, delete all user data
local username, host = session.username, session.host;
local ok, err = usermanager_delete_user(username, host);
if not ok then
module:log("debug", "Removing user account %s@%s failed: %s", username, host, err);
session.send(st.error_reply(stanza, "cancel", "service-unavailable", err));
return true;
end
session.send(st.reply(stanza));
local roster = session.roster;
for _, session in pairs(hosts[host].sessions[username].sessions) do -- disconnect all resources
session:close({condition = "not-authorized", text = "Account deleted"});
end
-- TODO datamanager should be able to delete all user data itself
datamanager.store(username, host, "vcard", nil);
datamanager.store(username, host, "private", nil);
datamanager.list_store(username, host, "offline", nil);
local bare = username.."@"..host;
for jid, item in pairs(roster) do
if jid and jid ~= "pending" then
if item.subscription == "both" or item.subscription == "from" or (roster.pending and roster.pending[jid]) then
core_post_stanza(hosts[host], st.presence({type="unsubscribed", from=bare, to=jid}));
end
if item.subscription == "both" or item.subscription == "to" or item.ask then
core_post_stanza(hosts[host], st.presence({type="unsubscribe", from=bare, to=jid}));
end
end
end
datamanager.store(username, host, "roster", nil);
datamanager.store(username, host, "privacy", nil);
module:log("info", "User removed their account: %s@%s", username, host);
module:fire_event("user-deregistered", { username = username, host = host, source = "mod_register", session = session });
else
local username = nodeprep(query:get_child("username"):get_text());
local password = query:get_child("password"):get_text();
if username and password then
if username == session.username then
if usermanager_set_password(username, password, session.host) then
session.send(st.reply(stanza));
else
-- TODO unable to write file, file may be locked, etc, what's the correct error?
session.send(st.error_reply(stanza, "wait", "internal-server-error"));
end
else
session.send(st.error_reply(stanza, "modify", "bad-request"));
end
else
session.send(st.error_reply(stanza, "modify", "bad-request"));
end
end
end
return true;
end
module:hook("iq/self/jabber:iq:register:query", handle_registration_stanza);
if compat then
module:hook("iq/host/jabber:iq:register:query", function (event)
local session, stanza = event.origin, event.stanza;
if session.type == "c2s" and jid_bare(stanza.attr.to) == session.host then
return handle_registration_stanza(event);
end
end);
end
local recent_ips = {};
local min_seconds_between_registrations = module:get_option("min_seconds_between_registrations");
local whitelist_only = module:get_option("whitelist_registration_only");
local whitelisted_ips = module:get_option("registration_whitelist") or { "127.0.0.1" };
local blacklisted_ips = module:get_option("registration_blacklist") or {};
for _, ip in ipairs(whitelisted_ips) do whitelisted_ips[ip] = true; end
for _, ip in ipairs(blacklisted_ips) do blacklisted_ips[ip] = true; end
module:hook("stanza/iq/jabber:iq:register:query", function(event)
local session, stanza = event.origin, event.stanza;
if not(allow_registration) or session.type ~= "c2s_unauthed" then
session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
else
local query = stanza.tags[1];
if stanza.attr.type == "get" then
local reply = st.reply(stanza);
reply:tag("query", {xmlns = "jabber:iq:register"})
:tag("instructions"):text("Choose a username and password for use with this service."):up()
:tag("username"):up()
:tag("password"):up();
session.send(reply);
elseif stanza.attr.type == "set" then
if query.tags[1] and query.tags[1].name == "remove" then
session.send(st.error_reply(stanza, "auth", "registration-required"));
else
local username = query:child_with_name("username");
local password = query:child_with_name("password");
if username and password then
-- Check that the user is not blacklisted or registering too often
if not session.ip then
module:log("debug", "User's IP not known; can't apply blacklist/whitelist");
elseif blacklisted_ips[session.ip] or (whitelist_only and not whitelisted_ips[session.ip]) then
session.send(st.error_reply(stanza, "cancel", "not-acceptable", "You are not allowed to register an account."));
return true;
elseif min_seconds_between_registrations and not whitelisted_ips[session.ip] then
if not recent_ips[session.ip] then
recent_ips[session.ip] = { time = os_time(), count = 1 };
else
local ip = recent_ips[session.ip];
ip.count = ip.count + 1;
if os_time() - ip.time < min_seconds_between_registrations then
ip.time = os_time();
session.send(st.error_reply(stanza, "wait", "not-acceptable"));
return true;
end
ip.time = os_time();
end
end
-- FIXME shouldn't use table.concat
username = nodeprep(table.concat(username));
password = table.concat(password);
local host = module.host;
if not username or username == "" then
session.send(st.error_reply(stanza, "modify", "not-acceptable", "The requested username is invalid."));
elseif usermanager_user_exists(username, host) then
session.send(st.error_reply(stanza, "cancel", "conflict", "The requested username already exists."));
else
if usermanager_create_user(username, password, host) then
session.send(st.reply(stanza)); -- user created!
module:log("info", "User account created: %s@%s", username, host);
module:fire_event("user-registered", {
username = username, host = host, source = "mod_register",
session = session });
else
-- TODO unable to write file, file may be locked, etc, what's the correct error?
session.send(st.error_reply(stanza, "wait", "internal-server-error", "Failed to write data to disk."));
end
end
else
session.send(st.error_reply(stanza, "modify", "not-acceptable"));
end
end
end
end
return true;
end);
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