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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
if module:get_host_type() ~= "component" then
error("Don't load mod_component manually, it should be for a component, please see http://prosody.im/doc/components", 0);
end
local hosts = _G.hosts;
local t_concat = table.concat;
local sha1 = require "util.hashes".sha1;
local st = require "util.stanza";
local log = module._log;
local main_session, send;
local function on_destroy(session, err)
if main_session == session then
main_session = nil;
send = nil;
session.on_destroy = nil;
end
end
local function handle_stanza(event)
local stanza = event.stanza;
if send then
stanza.attr.xmlns = nil;
send(stanza);
else
log("warn", "Stanza being handled by default component; bouncing error for: %s", stanza:top_tag());
if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
event.origin.send(st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable"));
end
end
return true;
end
module:hook("iq/bare", handle_stanza, -1);
module:hook("message/bare", handle_stanza, -1);
module:hook("presence/bare", handle_stanza, -1);
module:hook("iq/full", handle_stanza, -1);
module:hook("message/full", handle_stanza, -1);
module:hook("presence/full", handle_stanza, -1);
module:hook("iq/host", handle_stanza, -1);
module:hook("message/host", handle_stanza, -1);
module:hook("presence/host", handle_stanza, -1);
--- Handle authentication attempts by components
function handle_component_auth(event)
local session, stanza = event.origin, event.stanza;
if session.type ~= "component" then return; end
if main_session == session then return; end
if (not session.host) or #stanza.tags > 0 then
(session.log or log)("warn", "Invalid component handshake for host: %s", session.host);
session:close("not-authorized");
return true;
end
local secret = module:get_option("component_secret");
if not secret then
(session.log or log)("warn", "Component attempted to identify as %s, but component_secret is not set", session.host);
session:close("not-authorized");
return true;
end
local supplied_token = t_concat(stanza);
local calculated_token = sha1(session.streamid..secret, true);
if supplied_token:lower() ~= calculated_token:lower() then
log("info", "Component authentication failed for %s", session.host);
session:close{ condition = "not-authorized", text = "Given token does not match calculated token" };
return true;
end
-- If component not already created for this host, create one now
if not main_session then
send = session.send;
main_session = session;
session.on_destroy = on_destroy;
session.component_validate_from = module:get_option_boolean("validate_from_addresses", true);
log("info", "Component successfully authenticated: %s", session.host);
session.send(st.stanza("handshake"));
else -- TODO: Implement stanza distribution
log("error", "Multiple components bound to the same address, first one wins: %s", session.host);
session:close{ condition = "conflict", text = "Component already connected" };
end
return true;
end
module:hook("stanza/jabber:component:accept:handshake", handle_component_auth);
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