plugins/mod_register.lua

   1 -- Prosody IM v0.2
   2 -- Copyright (C) 2008 Matthew Wild
   3 -- Copyright (C) 2008 Waqas Hussain
   4 --
   5 -- This program is free software; you can redistribute it and/or
   6 -- modify it under the terms of the GNU General Public License
   7 -- as published by the Free Software Foundation; either version 2
   8 -- of the License, or (at your option) any later version.
   9 --
  10 -- This program is distributed in the hope that it will be useful,
  11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 -- GNU General Public License for more details.
  14 --
  15 -- You should have received a copy of the GNU General Public License
  16 -- along with this program; if not, write to the Free Software
  17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 --
  19
  20
  21
  22 local st = require "util.stanza";
  23 local usermanager_user_exists = require "core.usermanager".user_exists;
  24 local usermanager_create_user = require "core.usermanager".create_user;
  25 local datamanager_store = require "util.datamanager".store;
  26 local os_time = os.time;
  27
  28 module:add_feature("jabber:iq:register");
  29
  30 module:add_iq_handler("c2s", "jabber:iq:register", function (session, stanza)
  31         if stanza.tags[1].name == "query" then
  32                 local query = stanza.tags[1];
  33                 if stanza.attr.type == "get" then
  34                         local reply = st.reply(stanza);
  35                         reply:tag("query", {xmlns = "jabber:iq:register"})
  36                                 :tag("registered"):up()
  37                                 :tag("username"):text(session.username):up()
  38                                 :tag("password"):up();
  39                         session.send(reply);
  40                 elseif stanza.attr.type == "set" then
  41                         if query.tags[1] and query.tags[1].name == "remove" then
  42                                 -- TODO delete user auth data, send iq response, kick all user resources with a <not-authorized/>, delete all user data
  43                                 --session.send(st.error_reply(stanza, "cancel", "not-allowed"));
  44                                 --return;
  45                                 usermanager_create_user(session.username, nil, session.host); -- Disable account
  46                                 -- FIXME the disabling currently allows a different user to recreate the account
  47                                 -- we should add an in-memory account block mode when we have threading
  48                                 session.send(st.reply(stanza));
  49                                 local roster = session.roster;
  50                                 for _, session in pairs(hosts[session.host].sessions[session.username].sessions) do -- disconnect all resources
  51                                         session:disconnect({condition = "not-authorized", text = "Account deleted"});
  52                                 end
  53                                 -- TODO datamanager should be able to delete all user data itself
  54                                 datamanager.store(session.username, session.host, "roster", nil);
  55                                 datamanager.store(session.username, session.host, "vcard", nil);
  56                                 datamanager.store(session.username, session.host, "private", nil);
  57                                 datamanager.store(session.username, session.host, "offline", nil);
  58                                 local bare = session.username.."@"..session.host;
  59                                 for jid, item in pairs(roster) do
  60                                         if jid ~= "pending" then
  61                                                 if item.subscription == "both" or item.subscription == "to" then
  62                                                         -- TODO unsubscribe
  63                                                 end
  64                                                 if item.subscription == "both" or item.subscription == "from" then
  65                                                         -- TODO unsubscribe
  66                                                 end
  67                                         end
  68                                 end
  69                                 datamanager.store(session.username, session.host, "accounts", nil); -- delete accounts datastore at the end
  70                         else
  71                                 local username = query:child_with_name("username");
  72                                 local password = query:child_with_name("password");
  73                                 if username and password then
  74                                         -- FIXME shouldn't use table.concat
  75                                         username = table.concat(username);
  76                                         password = table.concat(password);
  77                                         if username == session.username then
  78                                                 if usermanager_create_user(username, password, session.host) then -- password change -- TODO is this the right way?
  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         else
  93                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
  94         end;
  95 end);
  96
  97 local recent_ips = {};
  98 local min_seconds_between_registrations = config.get(module.host, "core", "min_seconds_between_registrations");
  99 local whitelisted_ips = config.get(module.host, "core", "registration_whitelist") or { "127.0.0.1" };
 100 local blacklisted_ips = config.get(module.host, "core", "registration_blacklist") or {};
 101
 102 for _, ip in ipairs(whitelisted_ips) do whitelisted_ips[ip] = true; end
 103 for _, ip in ipairs(blacklisted_ips) do blacklisted_ips[ip] = true; end
 104
 105 module:add_iq_handler("c2s_unauthed", "jabber:iq:register", function (session, stanza)
 106         if config.get(module.host, "core", "allow_registration") == false then
 107                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
 108         elseif stanza.tags[1].name == "query" then
 109                 local query = stanza.tags[1];
 110                 if stanza.attr.type == "get" then
 111                         local reply = st.reply(stanza);
 112                         reply:tag("query", {xmlns = "jabber:iq:register"})
 113                                 :tag("instructions"):text("Choose a username and password for use with this service."):up()
 114                                 :tag("username"):up()
 115                                 :tag("password"):up();
 116                         session.send(reply);
 117                 elseif stanza.attr.type == "set" then
 118                         if query.tags[1] and query.tags[1].name == "remove" then
 119                                 session.send(st.error_reply(stanza, "auth", "registration-required"));
 120                         else
 121                                 local username = query:child_with_name("username");
 122                                 local password = query:child_with_name("password");
 123                                 if username and password then
 124                                         -- Check that the user is not blacklisted or registering too often
 125                                         if blacklisted_ips[session.ip] then
 126                                                         session.send(st.error_reply(stanza, "cancel", "not-acceptable"));
 127                                                         return;
 128                                         elseif min_seconds_between_registrations and not whitelisted_ips[session.ip] then
 129                                                 if not recent_ips[session.ip] then
 130                                                         recent_ips[session.ip] = { time = os_time(), count = 1 };
 131                                                 else
 132
 133                                                         local ip = recent_ips[session.ip];
 134                                                         ip.count = ip.count + 1;
 135
 136                                                         if os_time() - ip.time < min_seconds_between_registrations then
 137                                                                 ip.time = os_time();
 138                                                                 session.send(st.error_reply(stanza, "cancel", "not-acceptable"));
 139                                                                 return;
 140                                                         end
 141                                                         ip.time = os_time();
 142                                                 end
 143                                         end
 144                                         -- FIXME shouldn't use table.concat
 145                                         username = table.concat(username);
 146                                         password = table.concat(password);
 147                                         if usermanager_user_exists(username, session.host) then
 148                                                 session.send(st.error_reply(stanza, "cancel", "conflict"));
 149                                         else
 150                                                 if usermanager_create_user(username, password, session.host) then
 151                                                         session.send(st.reply(stanza)); -- user created!
 152                                                 else
 153                                                         -- TODO unable to write file, file may be locked, etc, what's the correct error?
 154                                                         session.send(st.error_reply(stanza, "wait", "internal-server-error"));
 155                                                 end
 156                                         end
 157                                 else
 158                                         session.send(st.error_reply(stanza, "modify", "not-acceptable"));
 159                                 end
 160                         end
 161                 end
 162         else
 163                 session.send(st.error_reply(stanza, "cancel", "service-unavailable"));
 164         end;
 165 end);
 166