plugins/mod_legacyauth.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
  11 local st = require "util.stanza";
  12 local t_concat = table.concat;
  13
  14 local secure_auth_only = module:get_option("require_encryption");
  15
  16 local sessionmanager = require "core.sessionmanager";
  17 local usermanager = require "core.usermanager";
  18 local nodeprep = require "util.encodings".stringprep.nodeprep;
  19 local resourceprep = require "util.encodings".stringprep.resourceprep;
  20
  21 module:add_feature("jabber:iq:auth");
  22 module:add_event_hook("stream-features", function (session, features)
  23         if secure_auth_only and not session.secure then
  24                 -- Sorry, not offering to insecure streams!
  25                 return;
  26         elseif not session.username then
  27                 features:tag("auth", {xmlns='http://jabber.org/features/iq-auth'}):up();
  28         end
  29 end);
  30
  31 module:add_iq_handler("c2s_unauthed", "jabber:iq:auth",
  32                 function (session, stanza)
  33                         if secure_auth_only and not session.secure then
  34                                 session.send(st.error_reply(stanza, "modify", "not-acceptable", "Encryption (SSL or TLS) is required to connect to this server"));
  35                                 return true;
  36                         end
  37
  38                         local username = stanza.tags[1]:child_with_name("username");
  39                         local password = stanza.tags[1]:child_with_name("password");
  40                         local resource = stanza.tags[1]:child_with_name("resource");
  41                         if not (username and password and resource) then
  42                                 local reply = st.reply(stanza);
  43                                 session.send(reply:query("jabber:iq:auth")
  44                                         :tag("username"):up()
  45                                         :tag("password"):up()
  46                                         :tag("resource"):up());
  47                         else
  48                                 username, password, resource = t_concat(username), t_concat(password), t_concat(resource);
  49                                 username = nodeprep(username);
  50                                 resource = resourceprep(resource)
  51                                 local reply = st.reply(stanza);
  52                                 if usermanager.validate_credentials(session.host, username, password) then
  53                                         -- Authentication successful!
  54                                         local success, err = sessionmanager.make_authenticated(session, username);
  55                                         if success then
  56                                                 local err_type, err_msg;
  57                                                 success, err_type, err, err_msg = sessionmanager.bind_resource(session, resource);
  58                                                 if not success then
  59                                                         session.send(st.error_reply(stanza, err_type, err, err_msg));
  60                                                         session.username, session.type = nil, "c2s_unauthed"; -- FIXME should this be placed in sessionmanager?
  61                                                         return true;
  62                                                 elseif resource ~= session.resource then -- server changed resource, not supported by legacy auth
  63                                                         session.send(st.error_reply(stanza, "cancel", "conflict", "The requested resource could not be assigned to this session."));
  64                                                         session:close(); -- FIXME undo resource bind and auth instead of closing the session?
  65                                                         return true;
  66                                                 end
  67                                         end
  68                                         session.send(st.reply(stanza));
  69                                 else
  70                                         session.send(st.error_reply(stanza, "auth", "not-authorized"));
  71                                 end
  72                         end
  73                         return true;
  74                 end);