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