--- Prosody IM v0.2
--- Copyright (C) 2008 Matthew Wild
--- Copyright (C) 2008 Waqas Hussain
+-- Prosody IM
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
--
--- This program is free software; you can redistribute it and/or
--- modify it under the terms of the GNU General Public License
--- as published by the Free Software Foundation; either version 2
--- of the License, or (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program; if not, write to the Free Software
--- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
--
+local config = require "core.configmanager";
+local create_context = require "core.certmanager".create_context;
+local st = require "util.stanza";
+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 allow_s2s_tls = module:get_option("s2s_allow_encryption") ~= false;
-local st = require "util.stanza";
+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 sessions = sessions;
+local global_ssl_ctx = prosody.global_ssl_ctx;
-local t_insert = table.insert;
+local host = hosts[module.host];
-local log = require "util.logger".init("mod_starttls");
+local function can_do_tls(session)
+ if session.type == "c2s_unauthed" then
+ return session.conn.starttls and host.ssl_ctx_in;
+ elseif session.type == "s2sin_unauthed" and allow_s2s_tls then
+ return session.conn.starttls and host.ssl_ctx_in;
+ elseif session.direction == "outgoing" and allow_s2s_tls then
+ return session.conn.starttls and host.ssl_ctx;
+ end
+ return false;
+end
-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 can_do_tls(origin) 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("debug", "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);
-module:add_handler("c2s_unauthed", "starttls", xmlns_starttls,
- function (session, stanza)
- if session.conn.starttls then
- session.send(st.stanza("proceed", { xmlns = xmlns_starttls }));
- 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);
-
-local starttls_attr = { xmlns = xmlns_starttls };
-module:add_event_hook("stream-features",
- function (session, features)
- if session.conn.starttls then
- features:tag("starttls", starttls_attr):up();
- end
- end);
+-- Advertize stream feature
+module:hook("stream-features", function(event)
+ local origin, features = event.origin, event.features;
+ if can_do_tls(origin) then
+ features:add_child(c2s_feature);
+ end
+end);
+module:hook("s2s-stream-features", function(event)
+ local origin, features = event.origin, event.features;
+ if can_do_tls(origin) 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 can_do_tls(session) 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);
+ session.secure = false;
+ return true;
+end);
+
+function module.load()
+ local ssl_config = config.rawget(module.host, "core", "ssl");
+ if not ssl_config then
+ local base_host = module.host:match("%.(.*)");
+ ssl_config = config.get(base_host, "core", "ssl");
+ end
+ host.ssl_ctx = create_context(host.host, "client", ssl_config); -- for outgoing connections
+ host.ssl_ctx_in = create_context(host.host, "server", ssl_config); -- for incoming connections
+end
+
+function module.unload()
+ host.ssl_ctx = nil;
+ host.ssl_ctx_in = nil;
+end
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