diff options
Diffstat (limited to 'plugins/mod_register_ibr.lua')
| -rw-r--r-- | plugins/mod_register_ibr.lua | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/plugins/mod_register_ibr.lua b/plugins/mod_register_ibr.lua new file mode 100644 index 00000000..b545d09b --- /dev/null +++ b/plugins/mod_register_ibr.lua @@ -0,0 +1,239 @@ +-- 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 dataform_new = require "util.dataforms".new; +local usermanager_user_exists = require "core.usermanager".user_exists; +local usermanager_create_user = require "core.usermanager".create_user; +local usermanager_delete_user = require "core.usermanager".delete_user; +local nodeprep = require "util.encodings".stringprep.nodeprep; +local create_throttle = require "util.throttle".create; +local new_cache = require "util.cache".new; +local ip_util = require "util.ip"; +local new_ip = ip_util.new_ip; +local match_ip = ip_util.match; +local parse_cidr = ip_util.parse_cidr; + +local additional_fields = module:get_option("additional_registration_fields", {}); +local require_encryption = module:get_option_boolean("c2s_require_encryption", + module:get_option_boolean("require_encryption", false)); + +local account_details = module:open_store("account_details"); + +local field_map = { + username = { name = "username", type = "text-single", label = "Username", required = true }; + password = { name = "password", type = "text-private", label = "Password", required = true }; + nick = { name = "nick", type = "text-single", label = "Nickname" }; + name = { name = "name", type = "text-single", label = "Full Name" }; + first = { name = "first", type = "text-single", label = "Given Name" }; + last = { name = "last", type = "text-single", label = "Family Name" }; + email = { name = "email", type = "text-single", label = "Email" }; + address = { name = "address", type = "text-single", label = "Street" }; + city = { name = "city", type = "text-single", label = "City" }; + state = { name = "state", type = "text-single", label = "State" }; + zip = { name = "zip", type = "text-single", label = "Postal code" }; + phone = { name = "phone", type = "text-single", label = "Telephone number" }; + url = { name = "url", type = "text-single", label = "Webpage" }; + 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 = title; + instructions = instructions; + + field_map.username; + field_map.password; +}; + +local registration_query = st.stanza("query", {xmlns = "jabber:iq:register"}) + :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; + elseif field_map[field] or field_map[field:sub(1, -2)] then + if field:match("%+$") then + 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()); + +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 session.type ~= "c2s_unauthed" or (require_encryption and not session.secure) then + return + end + + features:add_child(register_stream_feature); +end); + +local function parse_response(query) + local form = query:get_child("x", "jabber:x:data"); + if form then + return registration_form:data(form); + else + local data = {}; + local errors = {}; + for _, field in ipairs(registration_form) do + local name, required = field.name, field.required; + if field_map[name] then + data[name] = query:get_child_text(name); + if (not data[name] or #data[name] == 0) and required then + errors[name] = "Required value missing"; + end + end + end + if next(errors) then + return data, errors; + end + return data; + end +end + +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", "::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); + +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 + +local function ip_in_set(set, ip) + if set[ip] then + return true; + end + ip = new_ip(ip); + for in_set in pairs(set) do + if match_ip(ip, parse_cidr(in_set)) then + return true; + end + end + return false; +end + +-- In-band registration +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 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")); + else + local query = stanza.tags[1]; + if stanza.attr.type == "get" then + local reply = st.reply(stanza); + reply:add_child(registration_query); + 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 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 + log("debug", "User's IP not known; can't apply blacklist/whitelist"); + elseif ip_in_set(blacklisted_ips, session.ip) or (whitelist_only and not ip_in_set(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 throttle_max and not ip_in_set(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, additional = data, ip = session.ip, session = session, 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 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! + 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 + end + end + end + end + return true; +end); |