diff options
Diffstat (limited to 'plugins/mod_tls.lua')
| -rw-r--r-- | plugins/mod_tls.lua | 155 |
1 files changed, 66 insertions, 89 deletions
diff --git a/plugins/mod_tls.lua b/plugins/mod_tls.lua index f68552fa..8b96aa15 100644 --- a/plugins/mod_tls.lua +++ b/plugins/mod_tls.lua @@ -8,105 +8,82 @@ 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 allow_s2s_tls = module:get_option("s2s_allow_encryption") ~= false; -local host = hosts[module.host]; - +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 ---- 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); +local global_ssl_ctx = prosody.global_ssl_ctx; -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); ---- +local host = hosts[module.host]; --- Stop here if the user doesn't want to allow s2s encryption -if module:get_option("s2s_allow_encryption") == false then - return; +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 ---- 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); - +-- 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("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); -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); +-- 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(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("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..."); - 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); +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); |