diff options
Diffstat (limited to 'plugins/mod_register.lua')
| -rw-r--r-- | plugins/mod_register.lua | 108 |
1 files changed, 70 insertions, 38 deletions
diff --git a/plugins/mod_register.lua b/plugins/mod_register.lua index 63d0b077..72e91368 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); @@ -41,30 +42,37 @@ local field_map = { date = { name = "date", type = "text-single", label = "Birth date" }; }; +local title = module:get_option_string("registration_title", + "Creating a new account"); +local instructions = module:get_option_string("registration_instructions", + "Choose a username and password for use with this service."); + local registration_form = dataform_new{ - title = "Creating a new account"; - instructions = "Choose a username and password for use with this service."; + title = title; + instructions = instructions; field_map.username; field_map.password; }; local registration_query = st.stanza("query", {xmlns = "jabber:iq:register"}) - :tag("instructions"):text("Choose a username and password for use with this service."):up() + :tag("instructions"):text(instructions):up() :tag("username"):up() :tag("password"):up(); for _, field in ipairs(additional_fields) do if type(field) == "table" then registration_form[#registration_form + 1] = field; - else + elseif field_map[field] or field_map[field:sub(1, -2)] then if field:match("%+$") then - field = field:sub(1, #field - 1); + field = field:sub(1, -2); field_map[field].required = true; end registration_form[#registration_form + 1] = field_map[field]; registration_query:tag(field):up(); + else + module:log("error", "Unknown field %q", field); end end registration_query:add_child(registration_form:form()); @@ -73,7 +81,7 @@ 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" or (require_encryption and not session.secure) then @@ -85,6 +93,7 @@ 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 @@ -98,22 +107,23 @@ 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, ...); + session.close = function(self, ...) + self.send(st.reply(stanza)); + return old_session_close(self, ...); 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")); @@ -170,19 +180,39 @@ 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); -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 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); + +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 + log("debug", "Attempted registration when disabled or already authenticated"); session.send(st.error_reply(stanza, "cancel", "service-unavailable")); elseif require_encryption and not session.secure then session.send(st.error_reply(stanza, "modify", "policy-violation", "Encryption is required")); @@ -198,57 +228,59 @@ module:hook("stanza/iq/jabber:iq:register:query", function(event) else local data, errors = parse_response(query); if errors then + log("debug", "Error parsing registration form:"); + for field, err in pairs(errors) do + log("debug", "Field %q: %s", field, err); + end session.send(st.error_reply(stanza, "modify", "not-acceptable")); 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(); + elseif throttle_max and not whitelisted_ips[session.ip] then + if not check_throttle(session.ip) then + log("debug", "Registrations over limit for ip %s", session.ip or "?"); + session.send(st.error_reply(stanza, "wait", "not-acceptable")); + return true; end end local username, password = nodeprep(data.username), data.password; data.username, data.password = nil, nil; local host = module.host; if not username or username == "" then + log("debug", "The requested username is invalid."); session.send(st.error_reply(stanza, "modify", "not-acceptable", "The requested username is invalid.")); return true; end local user = { username = username , host = host, allowed = true } module:fire_event("user-registering", user); if not user.allowed then + log("debug", "Registration disallowed by module"); session.send(st.error_reply(stanza, "modify", "not-acceptable", "The requested username is forbidden.")); elseif usermanager_user_exists(username, host) then + log("debug", "Attempt to register with existing username"); session.send(st.error_reply(stanza, "cancel", "conflict", "The requested username already exists.")); else -- TODO unable to write file, file may be locked, etc, what's the correct error? local error_reply = st.error_reply(stanza, "wait", "internal-server-error", "Failed to write data to disk."); if usermanager_create_user(username, password, host) then + data.registered = os.time(); if next(data) and not account_details:set(username, data) then + log("debug", "Could not store extra details"); usermanager_delete_user(username, host); session.send(error_reply); 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 }); else + log("debug", "Could not create user"); session.send(error_reply); end end |