plugins/mod_register.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2009 Matthew Wild
   3 -- Copyright (C) 2008-2009 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 datamanager_store = require "util.datamanager".store;
  16 local os_time = os.time;
  17 local nodeprep = require "util.encodings".stringprep.nodeprep;
  18
  19 module:add_feature("jabber:iq:register");
  20
  21 module:add_iq_handler("c2s", "jabber:iq:register", function (session, stanza)
  22         if stanza.tags[1].name == "query" then
  23                 local query = stanza.tags[1];
  24                 if stanza.attr.type == "get" then
  25                         local reply = st.reply(stanza);
  26                         reply:tag("query", {xmlns = "jabber:iq:register"})
  27                                 :tag("registered"):up()
  28                                 :tag("username"):text(session.username):up()
  29                                 :tag("password"):up();
  30                         session.send(reply);
  31                 elseif stanza.attr.type == "set" then
  32                         if query.tags[1] and query.tags[1].name == "remove" then
  33                                 -- TODO delete user auth data, send iq response, kick all user resources with a <not-authorized/>, delete all user data
  34                                 local username, host = session.username, session.host;
  35                                 --session.send(st.error_reply(stanza, "cancel", "not-allowed"));
  36                                 --return;
  37                                 usermanager_create_user(username, nil, host); -- Disable account
  38                                 -- FIXME the disabling currently allows a different user to recreate the account
  39                                 -- we should add an in-memory account block mode when we have threading
  40                                 session.send(st.reply(stanza));
  41                                 local roster = session.roster;
  42                                 for _, session in pairs(hosts[host].sessions[username].sessions) do -- disconnect all resources
  43                                         session:close({condition = "not-authorized", text = "Account deleted"});
  44                                 end
  45                                 -- TODO datamanager should be able to delete all user data itself
  46                                 datamanager.store(username, host, "vcard", nil);
  47                                 datamanager.store(username, host, "private", nil);
  48                                 datamanager.store(username, host, "offline", nil);
  49                                 local bare = username.."@"..host;
  50                                 for jid, item in pairs(roster) do
  51                                         if jid and jid ~= "pending" then
  52                                                 if item.subscription == "both" or item.subscription == "from" or (roster.pending and roster.pending[jid]) then
  53                                                         core_post_stanza(hosts[host], st.presence({type="unsubscribed", from=bare, to=jid}));
  54                                                 end
  55                                                 if item.subscription == "both" or item.subscription == "to" or item.ask then
  56                                                         core_post_stanza(hosts[host], st.presence({type="unsubscribe", from=bare, to=jid}));
  57                                                 end
  58                                         end
  59                                 end
  60                                 datamanager.store(username, host, "roster", nil);
  61                                 datamanager.store(username, host, "accounts", nil); -- delete accounts datastore at the end
  62                                 module:log("info", "User removed their account: %s@%s", username, host);
  63                                 module:fire_event("user-deregistered", { username = username, host = host, source = "mod_register", session = session });
  64                         else
  65                                 local username = query:child_with_name("username");
  66                                 local password = query:child_with_name("password");
  67                                 if username and password then
  68                                         -- FIXME shouldn't use table.concat
  69                                         username = nodeprep(table.concat(username));
  70                                         password = table.concat(password);
  71                                         if username == session.username then
  72                                                 if usermanager_create_user(username, password, session.host) then -- password change -- TODO is this the right way?
  73                                                         session.send(st.reply(stanza));
  74                                                 else
  75                                                         -- TODO unable to write file, file may be locked, etc, what's the correct error?
  76                                                         session.send(st.error_reply(stanza, "wait", "internal-server-error"));
  77                                                 end
  78                                         else
  79                                                 session.send(st.error_reply(stanza, "modify", "bad-request"));
  80                                         end
  81                                 else
  82                                         session.send(st.error_reply(stanza, "modify", "bad-request"));
  83                                 end
  84                         end
  85                 end
  86         else
  87                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
  88         end;
  89 end);
  90
  91 local recent_ips = {};
  92 local min_seconds_between_registrations = module:get_option("min_seconds_between_registrations");
  93 local whitelist_only = module:get_option("whitelist_registration_only");
  94 local whitelisted_ips = module:get_option("registration_whitelist") or { "127.0.0.1" };
  95 local blacklisted_ips = module:get_option("registration_blacklist") or {};
  96
  97 for _, ip in ipairs(whitelisted_ips) do whitelisted_ips[ip] = true; end
  98 for _, ip in ipairs(blacklisted_ips) do blacklisted_ips[ip] = true; end
  99
 100 module:add_iq_handler("c2s_unauthed", "jabber:iq:register", function (session, stanza)
 101         if module:get_option("allow_registration") == false then
 102                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
 103         elseif stanza.tags[1].name == "query" then
 104                 local query = stanza.tags[1];
 105                 if stanza.attr.type == "get" then
 106                         local reply = st.reply(stanza);
 107                         reply:tag("query", {xmlns = "jabber:iq:register"})
 108                                 :tag("instructions"):text("Choose a username and password for use with this service."):up()
 109                                 :tag("username"):up()
 110                                 :tag("password"):up();
 111                         session.send(reply);
 112                 elseif stanza.attr.type == "set" then
 113                         if query.tags[1] and query.tags[1].name == "remove" then
 114                                 session.send(st.error_reply(stanza, "auth", "registration-required"));
 115                         else
 116                                 local username = query:child_with_name("username");
 117                                 local password = query:child_with_name("password");
 118                                 if username and password then
 119                                         -- Check that the user is not blacklisted or registering too often
 120                                         if not session.ip then
 121                                                 module:log("debug", "User's IP not known; can't apply blacklist/whitelist");
 122                                         elseif blacklisted_ips[session.ip] or (whitelist_only and not whitelisted_ips[session.ip]) then
 123                                                 session.send(st.error_reply(stanza, "cancel", "not-acceptable", "You are not allowed to register an account."));
 124                                                 return;
 125                                         elseif min_seconds_between_registrations and not whitelisted_ips[session.ip] then
 126                                                 if not recent_ips[session.ip] then
 127                                                         recent_ips[session.ip] = { time = os_time(), count = 1 };
 128                                                 else
 129                                                         local ip = recent_ips[session.ip];
 130                                                         ip.count = ip.count + 1;
 131
 132                                                         if os_time() - ip.time < min_seconds_between_registrations then
 133                                                                 ip.time = os_time();
 134                                                                 session.send(st.error_reply(stanza, "wait", "not-acceptable"));
 135                                                                 return;
 136                                                         end
 137                                                         ip.time = os_time();
 138                                                 end
 139                                         end
 140                                         -- FIXME shouldn't use table.concat
 141                                         username = nodeprep(table.concat(username));
 142                                         password = table.concat(password);
 143                                         local host = module.host;
 144                                         if not username then
 145                                                 session.send(st.error_reply(stanza, "modify", "not-acceptable", "The requested username is invalid."));
 146                                         elseif usermanager_user_exists(username, host) then
 147                                                 session.send(st.error_reply(stanza, "cancel", "conflict", "The requested username already exists."));
 148                                         else
 149                                                 if usermanager_create_user(username, password, host) then
 150                                                         session.send(st.reply(stanza)); -- user created!
 151                                                         module:log("info", "User account created: %s@%s", username, host);
 152                                                         module:fire_event("user-registered", {
 153                                                                 username = username, host = host, source = "mod_register",
 154                                                                 session = session });
 155                                                 else
 156                                                         -- TODO unable to write file, file may be locked, etc, what's the correct error?
 157                                                         session.send(st.error_reply(stanza, "wait", "internal-server-error", "Failed to write data to disk."));
 158                                                 end
 159                                         end
 160                                 else
 161                                         session.send(st.error_reply(stanza, "modify", "not-acceptable"));
 162                                 end
 163                         end
 164                 end
 165         else
 166                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
 167         end;
 168 end);
 169