| 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 | if module:get_host_type() ~= "component" then |
| 10 | error("Don't load mod_component manually, it should be for a component, please see http://prosody.im/doc/components", 0); |
| 11 | end |
| 12 | |
| 13 | local hosts = _G.hosts; |
| 14 | |
| 15 | local t_concat = table.concat; |
| 16 | |
| 17 | local sha1 = require "util.hashes".sha1; |
| 18 | local st = require "util.stanza"; |
| 19 | |
| 20 | local log = module._log; |
| 21 | |
| 22 | local main_session, send; |
| 23 | |
| 24 | local function on_destroy(session, err) |
| 25 | if main_session == session then |
| 26 | main_session = nil; |
| 27 | send = nil; |
| 28 | session.on_destroy = nil; |
| 29 | end |
| 30 | end |
| 31 | |
| 32 | local function handle_stanza(event) |
| 33 | local stanza = event.stanza; |
| 34 | if send then |
| 35 | stanza.attr.xmlns = nil; |
| 36 | send(stanza); |
| 37 | else |
| 38 | log("warn", "Stanza being handled by default component; bouncing error for: %s", stanza:top_tag()); |
| 39 | if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then |
| 40 | event.origin.send(st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable")); |
| 41 | end |
| 42 | end |
| 43 | return true; |
| 44 | end |
| 45 | |
| 46 | module:hook("iq/bare", handle_stanza, -1); |
| 47 | module:hook("message/bare", handle_stanza, -1); |
| 48 | module:hook("presence/bare", handle_stanza, -1); |
| 49 | module:hook("iq/full", handle_stanza, -1); |
| 50 | module:hook("message/full", handle_stanza, -1); |
| 51 | module:hook("presence/full", handle_stanza, -1); |
| 52 | module:hook("iq/host", handle_stanza, -1); |
| 53 | module:hook("message/host", handle_stanza, -1); |
| 54 | module:hook("presence/host", handle_stanza, -1); |
| 55 | |
| 56 | --- Handle authentication attempts by components |
| 57 | function handle_component_auth(event) |
| 58 | local session, stanza = event.origin, event.stanza; |
| 59 | |
| 60 | if session.type ~= "component" then return; end |
| 61 | if main_session == session then return; end |
| 62 | |
| 63 | if (not session.host) or #stanza.tags > 0 then |
| 64 | (session.log or log)("warn", "Invalid component handshake for host: %s", session.host); |
| 65 | session:close("not-authorized"); |
| 66 | return true; |
| 67 | end |
| 68 | |
| 69 | local secret = module:get_option("component_secret"); |
| 70 | if not secret then |
| 71 | (session.log or log)("warn", "Component attempted to identify as %s, but component_secret is not set", session.host); |
| 72 | session:close("not-authorized"); |
| 73 | return true; |
| 74 | end |
| 75 | |
| 76 | local supplied_token = t_concat(stanza); |
| 77 | local calculated_token = sha1(session.streamid..secret, true); |
| 78 | if supplied_token:lower() ~= calculated_token:lower() then |
| 79 | log("info", "Component authentication failed for %s", session.host); |
| 80 | session:close{ condition = "not-authorized", text = "Given token does not match calculated token" }; |
| 81 | return true; |
| 82 | end |
| 83 | |
| 84 | -- If component not already created for this host, create one now |
| 85 | if not main_session then |
| 86 | send = session.send; |
| 87 | main_session = session; |
| 88 | session.on_destroy = on_destroy; |
| 89 | session.component_validate_from = module:get_option_boolean("validate_from_addresses") ~= false; |
| 90 | log("info", "Component successfully authenticated: %s", session.host); |
| 91 | session.send(st.stanza("handshake")); |
| 92 | else -- TODO: Implement stanza distribution |
| 93 | log("error", "Multiple components bound to the same address, first one wins: %s", session.host); |
| 94 | session:close{ condition = "conflict", text = "Component already connected" }; |
| 95 | end |
| 96 | |
| 97 | return true; |
| 98 | end |
| 99 | |
| 100 | module:hook("stanza/jabber:component:accept:handshake", handle_component_auth); |