diff options
Diffstat (limited to 'plugins/mod_tls.lua')
| -rw-r--r-- | plugins/mod_tls.lua | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/plugins/mod_tls.lua b/plugins/mod_tls.lua new file mode 100644 index 00000000..80b56abb --- /dev/null +++ b/plugins/mod_tls.lua @@ -0,0 +1,107 @@ +-- 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 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 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 global_ssl_ctx = prosody.global_ssl_ctx; + +local hosts = prosody.hosts; +local host = hosts[module.host]; + +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 + +-- 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); + +-- 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("debug", "%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, "ssl"); + if not ssl_config then + local base_host = module.host:match("%.(.*)"); + ssl_config = config.get(base_host, "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 |