| 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); |