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116 lines
4.1 KiB
116 lines
4.1 KiB
-- Prosody IM
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-- Copyright (C) 2008-2010 Matthew Wild
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-- Copyright (C) 2008-2010 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local config = require "core.configmanager";
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local create_context = require "core.certmanager".create_context;
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local st = require "util.stanza";
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local secure_auth_only = module:get_option("c2s_require_encryption") or module:get_option("require_encryption");
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local secure_s2s_only = module:get_option("s2s_require_encryption");
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local allow_s2s_tls = module:get_option("s2s_allow_encryption") ~= false;
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local xmlns_starttls = 'urn:ietf:params:xml:ns:xmpp-tls';
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local starttls_attr = { xmlns = xmlns_starttls };
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local starttls_proceed = st.stanza("proceed", starttls_attr);
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local starttls_failure = st.stanza("failure", starttls_attr);
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local c2s_feature = st.stanza("starttls", starttls_attr);
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local s2s_feature = st.stanza("starttls", starttls_attr);
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if secure_auth_only then c2s_feature:tag("required"):up(); end
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if secure_s2s_only then s2s_feature:tag("required"):up(); end
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local hosts = prosody.hosts;
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local host = hosts[module.host];
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local ssl_ctx_c2s, ssl_ctx_s2sout, ssl_ctx_s2sin;
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do
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local function get_ssl_cfg(typ)
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local cfg_key = (typ and typ.."_" or "").."ssl";
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local ssl_config = config.rawget(module.host, cfg_key);
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if not ssl_config then
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local base_host = module.host:match("%.(.*)");
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ssl_config = config.get(base_host, cfg_key);
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end
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return ssl_config or typ and get_ssl_cfg();
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end
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local ssl_config, err = get_ssl_cfg("c2s");
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ssl_ctx_c2s, err = create_context(host.host, "server", ssl_config); -- for incoming client connections
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if err then module:log("error", "Error creating context for c2s: %s", err); end
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ssl_config = get_ssl_cfg("s2s");
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ssl_ctx_s2sin, err = create_context(host.host, "server", ssl_config); -- for incoming server connections
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ssl_ctx_s2sout = create_context(host.host, "client", ssl_config); -- for outgoing server connections
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if err then module:log("error", "Error creating context for s2s: %s", err); end -- Both would have the same issue
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end
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local function can_do_tls(session)
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if not session.conn.starttls then
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return false;
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elseif session.ssl_ctx then
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return true;
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end
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if session.type == "c2s_unauthed" then
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session.ssl_ctx = ssl_ctx_c2s;
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elseif session.type == "s2sin_unauthed" and allow_s2s_tls then
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session.ssl_ctx = ssl_ctx_s2sin;
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elseif session.direction == "outgoing" and allow_s2s_tls then
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session.ssl_ctx = ssl_ctx_s2sout;
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else
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return false;
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end
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return session.ssl_ctx;
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end
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-- Hook <starttls/>
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module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", function(event)
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local origin = event.origin;
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if can_do_tls(origin) then
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(origin.sends2s or origin.send)(starttls_proceed);
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origin:reset_stream();
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origin.conn:starttls(origin.ssl_ctx);
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origin.log("debug", "TLS negotiation started for %s...", origin.type);
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origin.secure = false;
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else
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origin.log("warn", "Attempt to start TLS, but TLS is not available on this %s connection", origin.type);
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(origin.sends2s or origin.send)(starttls_failure);
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origin:close();
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end
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return true;
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end);
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-- Advertize stream feature
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module:hook("stream-features", function(event)
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local origin, features = event.origin, event.features;
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if can_do_tls(origin) then
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features:add_child(c2s_feature);
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end
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end);
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module:hook("s2s-stream-features", function(event)
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local origin, features = event.origin, event.features;
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if can_do_tls(origin) then
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features:add_child(s2s_feature);
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end
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end);
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-- For s2sout connections, start TLS if we can
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module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza)
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module:log("debug", "Received features element");
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if can_do_tls(session) and stanza:child_with_ns(xmlns_starttls) then
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module:log("debug", "%s is offering TLS, taking up the offer...", session.to_host);
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session.sends2s("<starttls xmlns='"..xmlns_starttls.."'/>");
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return true;
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end
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end, 500);
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module:hook_stanza(xmlns_starttls, "proceed", function (session, stanza)
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module:log("debug", "Proceeding with TLS on s2sout...");
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session:reset_stream();
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session.conn:starttls(session.ssl_ctx);
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session.secure = false;
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return true;
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end);
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