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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.
--
local st = require "util.stanza";
local xmlns_stream = 'http://etherx.jabber.org/streams';
local xmlns_starttls = 'urn:ietf:params:xml:ns:xmpp-tls';
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 host = hosts[module.host];
local starttls_attr = { xmlns = xmlns_starttls };
--- Client-to-server TLS handling
module:add_handler("c2s_unauthed", "starttls", xmlns_starttls,
function (session, stanza)
if session.conn.starttls and host.ssl_ctx_in then
session.send(st.stanza("proceed", starttls_attr));
session:reset_stream();
if session.host and hosts[session.host].ssl_ctx_in then
session.conn.set_sslctx(hosts[session.host].ssl_ctx_in);
end
session.conn.starttls();
session.log("info", "TLS negotiation started...");
session.secure = false;
else
session.log("warn", "Attempt to start TLS, but TLS is not available on this connection");
(session.sends2s or session.send)(st.stanza("failure", starttls_attr));
session:close();
end
end);
module:add_event_hook("stream-features",
function (session, features)
if session.conn.starttls then
features:tag("starttls", starttls_attr);
if secure_auth_only then
features:tag("required"):up():up();
else
features:up();
end
end
end);
---
-- Stop here if the user doesn't want to allow s2s encryption
if module:get_option("s2s_allow_encryption") == false then
return;
end
--- Server-to-server TLS handling
module:add_handler("s2sin_unauthed", "starttls", xmlns_starttls,
function (session, stanza)
if session.conn.starttls and host.ssl_ctx_in then
session.sends2s(st.stanza("proceed", starttls_attr));
session:reset_stream();
if session.to_host and hosts[session.to_host].ssl_ctx_in then
session.conn.set_sslctx(hosts[session.to_host].ssl_ctx_in);
end
session.conn.starttls();
session.log("info", "TLS negotiation started for incoming s2s...");
session.secure = false;
else
session.log("warn", "Attempt to start TLS, but TLS is not available on this s2s connection");
(session.sends2s or session.send)(st.stanza("failure", starttls_attr));
session:close();
end
end);
module:hook("s2s-stream-features",
function (data)
local session, features = data.session, data.features;
if session.to_host and session.conn.starttls then
features:tag("starttls", starttls_attr);
if secure_s2s_only then
features:tag("required"):up():up();
else
features:up();
end
end
end);
-- For s2sout connections, start TLS if we can
module:hook_stanza(xmlns_stream, "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...");
local format, to_host, from_host = string.format, session.to_host, session.from_host;
local ssl_ctx = session.from_host and hosts[session.from_host].ssl_ctx or global_ssl_ctx;
session.conn.set_sslctx(ssl_ctx);
session:reset_stream();
session.conn.starttls(true);
session.secure = false;
return true;
end);
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