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-rw-r--r--plugins/mod_register_ibr.lua239
1 files changed, 239 insertions, 0 deletions
diff --git a/plugins/mod_register_ibr.lua b/plugins/mod_register_ibr.lua
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+++ b/plugins/mod_register_ibr.lua
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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 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);