mod_tls: Hook stream-features event using new events API.

[prosody.git] / plugins / mod_tls.lua

diff --git a/plugins/mod_tls.lua b/plugins/mod_tls.lua
index 21a35312b4f4c7c208c548b3003136caf8dfebdf..dfc1e338c38269ec3f0ddb86850959e3b3302bb0 100644 (file)
--- a/plugins/mod_tls.lua
+++ b/plugins/mod_tls.lua
@@ -1,33 +1,74 @@
+-- Prosody IM
+-- Copyright (C) 2008-2009 Matthew Wild
+-- Copyright (C) 2008-2009 Waqas Hussain
+-- 
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
 
 local st = require "util.stanza";
-local send = require "core.sessionmanager".send_to_session;
 
---local sessions = sessions;
+local secure_auth_only = module:get_option("c2s_require_encryption") or module:get_option("require_encryption");
+local secure_s2s_only = module:get_option("s2s_require_encryption");
 
-local t_insert = table.insert;
+local xmlns_starttls = 'urn:ietf:params:xml:ns:xmpp-tls';
+local starttls_attr = { xmlns = xmlns_starttls };
+local starttls_proceed = st.stanza("proceed", starttls_attr);
+local starttls_failure = st.stanza("failure", starttls_attr);
+local c2s_feature = st.stanza("starttls", starttls_attr);
+local s2s_feature = st.stanza("starttls", starttls_attr);
+if secure_auth_only then c2s_feature:tag("required"):up(); end
+if secure_s2s_only then s2s_feature:tag("required"):up(); end
 
-local log = require "util.logger".init("mod_starttls");
+local global_ssl_ctx = prosody.global_ssl_ctx;
 
-local xmlns_starttls ='urn:ietf:params:xml:ns:xmpp-tls';
+-- Hook <starttls/>
+module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", function(event)
+       local origin = event.origin;
+       if origin.conn.starttls then
+               (origin.sends2s or origin.send)(starttls_proceed);
+               origin:reset_stream();
+               local host = origin.to_host or origin.host;
+               local ssl_ctx = host and hosts[host].ssl_ctx_in or global_ssl_ctx;
+               origin.conn:starttls(ssl_ctx);
+               origin.log("info", "TLS negotiation started for %s...", origin.type);
+               origin.secure = false;
+       else
+               origin.log("warn", "Attempt to start TLS, but TLS is not available on this %s connection", origin.type);
+               (origin.sends2s or origin.send)(starttls_failure);
+               origin:close();
+       end
+       return true;
+end);
 
-add_handler("c2s_unauthed", "starttls", xmlns_starttls,
-               function (session, stanza)
-                       if session.conn.starttls then
-                               send(session, st.stanza("proceed", { xmlns = xmlns_starttls }));
-                               -- FIXME: I'm commenting the below, not sure why it was necessary
-                               -- sessions[session.conn] = nil;
-                               session:reset_stream();
-                               session.conn.starttls();
-                               session.log("info", "TLS negotiation started...");
-                       else
-                               -- FIXME: What reply?
-                               session.log("warn", "Attempt to start TLS, but TLS is not available on this connection");
-                       end
-               end);
-               
-add_event_hook("stream-features", 
-                                       function (session, features)                                                                                            
-                                               if session.conn.starttls then
-                                                       t_insert(features, "<starttls xmlns='"..xmlns_starttls.."'/>");
-                                               end
-                                       end);
+-- Advertize stream feature
+module:hook("stream-features", function(event)
+       local origin, features = event.origin, event.features;
+       if not origin.username and origin.conn.starttls then
+               features:add_child(c2s_feature);
+       end
+end);
+module:hook("s2s-stream-features", function(event)
+       local session, features = event.session, event.features;
+       if session.to_host and session.type ~= "s2sin" and session.conn.starttls then
+               features:add_child(s2s_feature);
+       end
+end);
+
+-- For s2sout connections, start TLS if we can
+module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza)
+       module:log("debug", "Received features element");
+       if session.conn.starttls and stanza:child_with_ns(xmlns_starttls) then
+               module:log("%s is offering TLS, taking up the offer...", session.to_host);
+               session.sends2s("<starttls xmlns='"..xmlns_starttls.."'/>");
+               return true;
+       end
+end, 500);
+module:hook_stanza(xmlns_starttls, "proceed", function (session, stanza)
+       module:log("debug", "Proceeding with TLS on s2sout...");
+       session:reset_stream();
+       local ssl_ctx = session.from_host and hosts[session.from_host].ssl_ctx or global_ssl_ctx;
+       session.conn:starttls(ssl_ctx, true);
+       session.secure = false;
+       return true;
+end);