diff options
Diffstat (limited to 'plugins/mod_register.lua')
| -rw-r--r-- | plugins/mod_register.lua | 71 |
1 files changed, 42 insertions, 29 deletions
diff --git a/plugins/mod_register.lua b/plugins/mod_register.lua index 3d7a068c..fda717f7 100644 --- a/plugins/mod_register.lua +++ b/plugins/mod_register.lua @@ -1,7 +1,7 @@ -- 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. -- @@ -13,9 +13,10 @@ 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 create_throttle = require "util.throttle".create; +local new_cache = require "util.cache".new; local compat = module:get_option_boolean("registration_compat", true); local allow_registration = module:get_option_boolean("allow_registration", false); @@ -72,7 +73,7 @@ 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; + local session, features = event.origin, event.features; -- Advertise registration to unauthorized clients only. if not(allow_registration) or session.type ~= "c2s_unauthed" then @@ -84,6 +85,7 @@ end); local function handle_registration_stanza(event) local session, stanza = event.origin, event.stanza; + local log = session.log or module._log; local query = stanza.tags[1]; if stanza.attr.type == "get" then @@ -97,22 +99,23 @@ local function handle_registration_stanza(event) if query.tags[1] and query.tags[1].name == "remove" then local username, host = session.username, session.host; + -- This one weird trick sends a reply to this stanza before the user is deleted local old_session_close = session.close; session.close = function(session, ...) session.send(st.reply(stanza)); return old_session_close(session, ...); end - + 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); + log("debug", "Removing user account %s@%s failed: %s", username, host, err); session.close = old_session_close; session.send(st.error_reply(stanza, "cancel", "service-unavailable", err)); return true; end - - module:log("info", "User removed their account: %s@%s", username, host); + + 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_text("username")); @@ -169,17 +172,36 @@ local function parse_response(query) 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 {}; +local min_seconds_between_registrations = module:get_option_number("min_seconds_between_registrations"); +local whitelist_only = module:get_option_boolean("whitelist_registration_only"); +local whitelisted_ips = module:get_option_set("registration_whitelist", { "127.0.0.1" })._items; +local blacklisted_ips = module:get_option_set("registration_blacklist", {})._items; + +local throttle_max = module:get_option_number("registration_throttle_max", min_seconds_between_registrations and 1); +local throttle_period = module:get_option_number("registration_throttle_period", min_seconds_between_registrations); +local throttle_cache_size = module:get_option_number("registration_throttle_cache_size", 100); +local blacklist_overflow = module:get_option_boolean("blacklist_on_registration_throttle_overload", false); + +local throttle_cache = new_cache(throttle_cache_size, blacklist_overflow and function (ip, throttle) + if not throttle:peek() then + module:log("info", "Adding ip %s to registration blacklist", ip); + blacklisted_ips[ip] = true; + end +end or nil); -for _, ip in ipairs(whitelisted_ips) do whitelisted_ips[ip] = true; end -for _, ip in ipairs(blacklisted_ips) do blacklisted_ips[ip] = true; end +local function check_throttle(ip) + if not throttle_max then return true end + local throttle = throttle_cache:get(ip); + if not throttle then + throttle = create_throttle(throttle_max, throttle_period); + end + throttle_cache:set(ip, throttle); + return throttle:poll(1); +end module:hook("stanza/iq/jabber:iq:register:query", function(event) local session, stanza = event.origin, event.stanza; + local log = session.log or module._log; if not(allow_registration) or session.type ~= "c2s_unauthed" then session.send(st.error_reply(stanza, "cancel", "service-unavailable")); @@ -199,23 +221,14 @@ module:hook("stanza/iq/jabber:iq:register:query", function(event) else -- 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"); + 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(); + if check_throttle(session.ip) then + session.send(st.error_reply(stanza, "wait", "not-acceptable")); + return true; end end local username, password = nodeprep(data.username), data.password; @@ -241,7 +254,7 @@ module:hook("stanza/iq/jabber:iq:register:query", function(event) return true; end session.send(st.reply(stanza)); -- user created! - module:log("info", "User account created: %s@%s", username, host); + log("info", "User account created: %s@%s", username, host); module:fire_event("user-registered", { username = username, host = host, source = "mod_register", session = session }); 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