plugins/mod_legacyauth.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
  11 local st = require "util.stanza";
  12 local t_concat = table.concat;
  13
  14 local secure_auth_only = module:get_option("c2s_require_encryption") or 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:hook("stream-features", function(event)
  23         local origin, features = event.origin, event.features;
  24         if secure_auth_only and not origin.secure then
  25                 -- Sorry, not offering to insecure streams!
  26                 return;
  27         elseif not origin.username then
  28                 features:tag("auth", {xmlns='http://jabber.org/features/iq-auth'}):up();
  29         end
  30 end);
  31
  32 module:hook("stanza/iq/jabber:iq:auth:query", function(event)
  33         local session, stanza = event.origin, event.stanza;
  34
  35         if session.type ~= "c2s_unauthed" then
  36                 session.send(st.error_reply(stanza, "cancel", "service-unavailable", "Legacy authentication is only allowed for unauthenticated client connections."));
  37                 return true;
  38         end
  39
  40         if secure_auth_only and not session.secure then
  41                 session.send(st.error_reply(stanza, "modify", "not-acceptable", "Encryption (SSL or TLS) is required to connect to this server"));
  42                 return true;
  43         end
  44
  45         local username = stanza.tags[1]:child_with_name("username");
  46         local password = stanza.tags[1]:child_with_name("password");
  47         local resource = stanza.tags[1]:child_with_name("resource");
  48         if not (username and password and resource) then
  49                 local reply = st.reply(stanza);
  50                 session.send(reply:query("jabber:iq:auth")
  51                         :tag("username"):up()
  52                         :tag("password"):up()
  53                         :tag("resource"):up());
  54         else
  55                 username, password, resource = t_concat(username), t_concat(password), t_concat(resource);
  56                 username = nodeprep(username);
  57                 resource = resourceprep(resource)
  58                 local reply = st.reply(stanza);
  59                 if usermanager.test_password(username, session.host, password) then
  60                         -- Authentication successful!
  61                         local success, err = sessionmanager.make_authenticated(session, username);
  62                         if success then
  63                                 local err_type, err_msg;
  64                                 success, err_type, err, err_msg = sessionmanager.bind_resource(session, resource);
  65                                 if not success then
  66                                         session.send(st.error_reply(stanza, err_type, err, err_msg));
  67                                         session.username, session.type = nil, "c2s_unauthed"; -- FIXME should this be placed in sessionmanager?
  68                                         return true;
  69                                 elseif resource ~= session.resource then -- server changed resource, not supported by legacy auth
  70                                         session.send(st.error_reply(stanza, "cancel", "conflict", "The requested resource could not be assigned to this session."));
  71                                         session:close(); -- FIXME undo resource bind and auth instead of closing the session?
  72                                         return true;
  73                                 end
  74                         end
  75                         session.send(st.reply(stanza));
  76                 else
  77                         session.send(st.error_reply(stanza, "auth", "not-authorized"));
  78                 end
  79         end
  80         return true;
  81 end);