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 config = require "core.configmanager";
  15 local secure_auth_only = config.get(module:get_host(), "core", "require_encryption");
  16
  17 local sessionmanager = require "core.sessionmanager";
  18 local usermanager = require "core.usermanager";
  19 local nodeprep = require "util.encodings".stringprep.nodeprep;
  20 local resourceprep = require "util.encodings".stringprep.resourceprep;
  21
  22 module:add_feature("jabber:iq:auth");
  23 module:add_event_hook("stream-features", function (session, features)
  24         if secure_auth_only and not session.secure then
  25                 -- Sorry, not offering to insecure streams!
  26                 return;
  27         elseif not session.username then
  28                 features:tag("auth", {xmlns='http://jabber.org/features/iq-auth'}):up();
  29         end
  30 end);
  31
  32 module:add_iq_handler("c2s_unauthed", "jabber:iq:auth",
  33                 function (session, stanza)
  34                         if secure_auth_only and not session.secure then
  35                                 session.send(st.error_reply(stanza, "modify", "not-acceptable", "Encryption (SSL or TLS) is required to connect to this server"));
  36                                 return true;
  37                         end
  38
  39                         local username = stanza.tags[1]:child_with_name("username");
  40                         local password = stanza.tags[1]:child_with_name("password");
  41                         local resource = stanza.tags[1]:child_with_name("resource");
  42                         if not (username and password and resource) then
  43                                 local reply = st.reply(stanza);
  44                                 session.send(reply:query("jabber:iq:auth")
  45                                         :tag("username"):up()
  46                                         :tag("password"):up()
  47                                         :tag("resource"):up());
  48                                 return true;
  49                         else
  50                                 username, password, resource = t_concat(username), t_concat(password), t_concat(resource);
  51                                 username = nodeprep(username);
  52                                 resource = resourceprep(resource)
  53                                 local reply = st.reply(stanza);
  54                                 require "core.usermanager"
  55                                 if username and resource and usermanager.validate_credentials(session.host, username, password) then
  56                                         -- Authentication successful!
  57                                         local success, err = sessionmanager.make_authenticated(session, username);
  58                                         if success then
  59                                                 local err_type, err_msg;
  60                                                 success, err_type, err, err_msg = sessionmanager.bind_resource(session, resource);
  61                                                 if not success then
  62                                                         session.send(st.error_reply(stanza, err_type, err, err_msg));
  63                                                         session.username, session.type = nil, "c2s_unauthed"; -- FIXME should this be placed in sessionmanager?
  64                                                         return true;
  65                                                 elseif resource ~= session.resource then -- server changed resource, not supported by legacy auth
  66                                                         session.send(st.error_reply(stanza, "cancel", "conflict", "The requested resource could not be assigned to this session."));
  67                                                         session:close(); -- FIXME undo resource bind and auth instead of closing the session?
  68                                                         return true;
  69                                                 end
  70                                         end
  71                                         session.send(st.reply(stanza));
  72                                         return true;
  73                                 else
  74                                         local reply = st.reply(stanza);
  75                                         reply.attr.type = "error";
  76                                         reply:tag("error", { code = "401", type = "auth" })
  77                                                 :tag("not-authorized", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" });
  78                                         session.send(reply);
  79                                         return true;
  80                                 end
  81                         end
  82
  83                 end);