2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
9 local create_context = require "core.certmanager".create_context;
10 local rawgetopt = require"core.configmanager".rawget;
11 local st = require "util.stanza";
13 local c2s_require_encryption = module:get_option("c2s_require_encryption", module:get_option("require_encryption"));
14 local s2s_require_encryption = module:get_option("s2s_require_encryption");
15 local allow_s2s_tls = module:get_option("s2s_allow_encryption") ~= false;
16 local s2s_secure_auth = module:get_option("s2s_secure_auth");
18 if s2s_secure_auth and s2s_require_encryption == false then
19 module:log("warn", "s2s_secure_auth implies s2s_require_encryption, but s2s_require_encryption is set to false");
20 s2s_require_encryption = true;
23 local xmlns_starttls = 'urn:ietf:params:xml:ns:xmpp-tls';
24 local starttls_attr = { xmlns = xmlns_starttls };
25 local starttls_initiate= st.stanza("starttls", starttls_attr);
26 local starttls_proceed = st.stanza("proceed", starttls_attr);
27 local starttls_failure = st.stanza("failure", starttls_attr);
28 local c2s_feature = st.stanza("starttls", starttls_attr);
29 local s2s_feature = st.stanza("starttls", starttls_attr);
30 if c2s_require_encryption then c2s_feature:tag("required"):up(); end
31 if s2s_require_encryption then s2s_feature:tag("required"):up(); end
33 local hosts = prosody.hosts;
34 local host = hosts[module.host];
36 local ssl_ctx_c2s, ssl_ctx_s2sout, ssl_ctx_s2sin;
37 local ssl_cfg_c2s, ssl_cfg_s2sout, ssl_cfg_s2sin;
40 local modhost = module.host;
41 local parent = modhost:match("%.(.*)$");
43 local parent_ssl = rawgetopt(parent, "ssl") or NULL;
44 local host_ssl = rawgetopt(modhost, "ssl") or parent_ssl;
46 local global_c2s = rawgetopt("*", "c2s_ssl") or NULL;
47 local parent_c2s = rawgetopt(parent, "c2s_ssl") or NULL;
48 local host_c2s = rawgetopt(modhost, "c2s_ssl") or parent_c2s;
50 local global_s2s = rawgetopt("*", "s2s_ssl") or NULL;
51 local parent_s2s = rawgetopt(parent, "s2s_ssl") or NULL;
52 local host_s2s = rawgetopt(modhost, "s2s_ssl") or parent_s2s;
54 ssl_ctx_c2s, err, ssl_cfg_c2s = create_context(host.host, "server", host_c2s, host_ssl, global_c2s); -- for incoming client connections
55 if not ssl_ctx_c2s then module:log("error", "Error creating context for c2s: %s", err); end
57 ssl_ctx_s2sout, err, ssl_cfg_s2sout = create_context(host.host, "client", host_s2s, host_ssl, global_s2s); -- for outgoing server connections
58 if not ssl_ctx_s2sout then module:log("error", "Error creating contexts for s2sout: %s", err); end
60 ssl_ctx_s2sin, err, ssl_cfg_s2sin = create_context(host.host, "server", host_s2s, host_ssl, global_s2s); -- for incoming server connections
61 if not ssl_ctx_s2sin then module:log("error", "Error creating contexts for s2sin: %s", err); end
64 local function can_do_tls(session)
65 if session.ssl_ctx == false or not session.conn.starttls then
67 elseif session.ssl_ctx then
70 if session.type == "c2s_unauthed" then
71 session.ssl_ctx = ssl_ctx_c2s;
72 session.ssl_cfg = ssl_cfg_c2s;
73 elseif session.type == "s2sin_unauthed" and allow_s2s_tls then
74 session.ssl_ctx = ssl_ctx_s2sin;
75 session.ssl_cfg = ssl_cfg_s2sin;
76 elseif session.direction == "outgoing" and allow_s2s_tls then
77 session.ssl_ctx = ssl_ctx_s2sout;
78 session.ssl_cfg = ssl_cfg_s2sout;
82 return session.ssl_ctx;
86 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", function(event)
87 local origin = event.origin;
88 if can_do_tls(origin) then
89 (origin.sends2s or origin.send)(starttls_proceed);
90 origin:reset_stream();
91 origin.conn:starttls(origin.ssl_ctx);
92 origin.log("debug", "TLS negotiation started for %s...", origin.type);
93 origin.secure = false;
95 origin.log("warn", "Attempt to start TLS, but TLS is not available on this %s connection", origin.type);
96 (origin.sends2s or origin.send)(starttls_failure);
102 -- Advertize stream feature
103 module:hook("stream-features", function(event)
104 local origin, features = event.origin, event.features;
105 if can_do_tls(origin) then
106 features:add_child(c2s_feature);
109 module:hook("s2s-stream-features", function(event)
110 local origin, features = event.origin, event.features;
111 if can_do_tls(origin) then
112 features:add_child(s2s_feature);
116 -- For s2sout connections, start TLS if we can
117 module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza)
118 module:log("debug", "Received features element");
119 if can_do_tls(session) and stanza:get_child("starttls", xmlns_starttls) then
120 module:log("debug", "%s is offering TLS, taking up the offer...", session.to_host);
121 session.sends2s(starttls_initiate);
126 module:hook_stanza(xmlns_starttls, "proceed", function (session, stanza)
127 module:log("debug", "Proceeding with TLS on s2sout...");
128 session:reset_stream();
129 session.conn:starttls(session.ssl_ctx);
130 session.secure = false;