plugins/mod_register.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2010 Matthew Wild
   3 -- Copyright (C) 2008-2010 Waqas Hussain
   4 --
   5 -- This project is MIT/X11 licensed. Please see the
   6 -- COPYING file in the source package for more information.
   7 --
   8
   9
  10 local hosts = _G.hosts;
  11 local st = require "util.stanza";
  12 local datamanager = require "util.datamanager";
  13 local usermanager_user_exists = require "core.usermanager".user_exists;
  14 local usermanager_create_user = require "core.usermanager".create_user;
  15 local usermanager_set_password = require "core.usermanager".set_password;
  16 local datamanager_store = require "util.datamanager".store;
  17 local os_time = os.time;
  18 local nodeprep = require "util.encodings".stringprep.nodeprep;
  19
  20 module:add_feature("jabber:iq:register");
  21
  22 module:add_iq_handler("c2s", "jabber:iq:register", function (session, stanza)
  23         if stanza.tags[1].name == "query" then
  24                 local query = stanza.tags[1];
  25                 if stanza.attr.type == "get" then
  26                         local reply = st.reply(stanza);
  27                         reply:tag("query", {xmlns = "jabber:iq:register"})
  28                                 :tag("registered"):up()
  29                                 :tag("username"):text(session.username):up()
  30                                 :tag("password"):up();
  31                         session.send(reply);
  32                 elseif stanza.attr.type == "set" then
  33                         if query.tags[1] and query.tags[1].name == "remove" then
  34                                 -- TODO delete user auth data, send iq response, kick all user resources with a <not-authorized/>, delete all user data
  35                                 local username, host = session.username, session.host;
  36                                 --session.send(st.error_reply(stanza, "cancel", "not-allowed"));
  37                                 --return;
  38                                 usermanager_set_password(username, nil, host); -- Disable account
  39                                 -- FIXME the disabling currently allows a different user to recreate the account
  40                                 -- we should add an in-memory account block mode when we have threading
  41                                 session.send(st.reply(stanza));
  42                                 local roster = session.roster;
  43                                 for _, session in pairs(hosts[host].sessions[username].sessions) do -- disconnect all resources
  44                                         session:close({condition = "not-authorized", text = "Account deleted"});
  45                                 end
  46                                 -- TODO datamanager should be able to delete all user data itself
  47                                 datamanager.store(username, host, "vcard", nil);
  48                                 datamanager.store(username, host, "private", nil);
  49                                 datamanager.list_store(username, host, "offline", nil);
  50                                 local bare = username.."@"..host;
  51                                 for jid, item in pairs(roster) do
  52                                         if jid and jid ~= "pending" then
  53                                                 if item.subscription == "both" or item.subscription == "from" or (roster.pending and roster.pending[jid]) then
  54                                                         core_post_stanza(hosts[host], st.presence({type="unsubscribed", from=bare, to=jid}));
  55                                                 end
  56                                                 if item.subscription == "both" or item.subscription == "to" or item.ask then
  57                                                         core_post_stanza(hosts[host], st.presence({type="unsubscribe", from=bare, to=jid}));
  58                                                 end
  59                                         end
  60                                 end
  61                                 datamanager.store(username, host, "roster", nil);
  62                                 datamanager.store(username, host, "privacy", nil);
  63                                 datamanager.store(username, host, "accounts", nil); -- delete accounts datastore at the end
  64                                 module:log("info", "User removed their account: %s@%s", username, host);
  65                                 module:fire_event("user-deregistered", { username = username, host = host, source = "mod_register", session = session });
  66                         else
  67                                 local username = query:child_with_name("username");
  68                                 local password = query:child_with_name("password");
  69                                 if username and password then
  70                                         -- FIXME shouldn't use table.concat
  71                                         username = nodeprep(table.concat(username));
  72                                         password = table.concat(password);
  73                                         if username == session.username then
  74                                                 if usermanager_set_password(username, password, session.host) then
  75                                                         session.send(st.reply(stanza));
  76                                                 else
  77                                                         -- TODO unable to write file, file may be locked, etc, what's the correct error?
  78                                                         session.send(st.error_reply(stanza, "wait", "internal-server-error"));
  79                                                 end
  80                                         else
  81                                                 session.send(st.error_reply(stanza, "modify", "bad-request"));
  82                                         end
  83                                 else
  84                                         session.send(st.error_reply(stanza, "modify", "bad-request"));
  85                                 end
  86                         end
  87                 end
  88         else
  89                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
  90         end;
  91 end);
  92
  93 local recent_ips = {};
  94 local min_seconds_between_registrations = module:get_option("min_seconds_between_registrations");
  95 local whitelist_only = module:get_option("whitelist_registration_only");
  96 local whitelisted_ips = module:get_option("registration_whitelist") or { "127.0.0.1" };
  97 local blacklisted_ips = module:get_option("registration_blacklist") or {};
  98
  99 for _, ip in ipairs(whitelisted_ips) do whitelisted_ips[ip] = true; end
 100 for _, ip in ipairs(blacklisted_ips) do blacklisted_ips[ip] = true; end
 101
 102 module:add_iq_handler("c2s_unauthed", "jabber:iq:register", function (session, stanza)
 103         if module:get_option("allow_registration") == false then
 104                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
 105         elseif stanza.tags[1].name == "query" then
 106                 local query = stanza.tags[1];
 107                 if stanza.attr.type == "get" then
 108                         local reply = st.reply(stanza);
 109                         reply:tag("query", {xmlns = "jabber:iq:register"})
 110                                 :tag("instructions"):text("Choose a username and password for use with this service."):up()
 111                                 :tag("username"):up()
 112                                 :tag("password"):up();
 113                         session.send(reply);
 114                 elseif stanza.attr.type == "set" then
 115                         if query.tags[1] and query.tags[1].name == "remove" then
 116                                 session.send(st.error_reply(stanza, "auth", "registration-required"));
 117                         else
 118                                 local username = query:child_with_name("username");
 119                                 local password = query:child_with_name("password");
 120                                 if username and password then
 121                                         -- Check that the user is not blacklisted or registering too often
 122                                         if not session.ip then
 123                                                 module:log("debug", "User's IP not known; can't apply blacklist/whitelist");
 124                                         elseif blacklisted_ips[session.ip] or (whitelist_only and not whitelisted_ips[session.ip]) then
 125                                                 session.send(st.error_reply(stanza, "cancel", "not-acceptable", "You are not allowed to register an account."));
 126                                                 return;
 127                                         elseif min_seconds_between_registrations and not whitelisted_ips[session.ip] then
 128                                                 if not recent_ips[session.ip] then
 129                                                         recent_ips[session.ip] = { time = os_time(), count = 1 };
 130                                                 else
 131                                                         local ip = recent_ips[session.ip];
 132                                                         ip.count = ip.count + 1;
 133
 134                                                         if os_time() - ip.time < min_seconds_between_registrations then
 135                                                                 ip.time = os_time();
 136                                                                 session.send(st.error_reply(stanza, "wait", "not-acceptable"));
 137                                                                 return;
 138                                                         end
 139                                                         ip.time = os_time();
 140                                                 end
 141                                         end
 142                                         -- FIXME shouldn't use table.concat
 143                                         username = nodeprep(table.concat(username));
 144                                         password = table.concat(password);
 145                                         local host = module.host;
 146                                         if not username or username == "" then
 147                                                 session.send(st.error_reply(stanza, "modify", "not-acceptable", "The requested username is invalid."));
 148                                         elseif usermanager_user_exists(username, host) then
 149                                                 session.send(st.error_reply(stanza, "cancel", "conflict", "The requested username already exists."));
 150                                         else
 151                                                 if usermanager_create_user(username, password, host) then
 152                                                         session.send(st.reply(stanza)); -- user created!
 153                                                         module:log("info", "User account created: %s@%s", username, host);
 154                                                         module:fire_event("user-registered", {
 155                                                                 username = username, host = host, source = "mod_register",
 156                                                                 session = session });
 157                                                 else
 158                                                         -- TODO unable to write file, file may be locked, etc, what's the correct error?
 159                                                         session.send(st.error_reply(stanza, "wait", "internal-server-error", "Failed to write data to disk."));
 160                                                 end
 161                                         end
 162                                 else
 163                                         session.send(st.error_reply(stanza, "modify", "not-acceptable"));
 164                                 end
 165                         end
 166                 end
 167         else
 168                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
 169         end;
 170 end);
 171