diff options
Diffstat (limited to 'plugins/mod_dialback.lua')
| -rw-r--r-- | plugins/mod_dialback.lua | 69 |
1 files changed, 48 insertions, 21 deletions
diff --git a/plugins/mod_dialback.lua b/plugins/mod_dialback.lua index dc3c3f10..dcbf9448 100644 --- a/plugins/mod_dialback.lua +++ b/plugins/mod_dialback.lua @@ -1,7 +1,7 @@ -- 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. -- @@ -14,20 +14,45 @@ local st = require "util.stanza"; local sha256_hash = require "util.hashes".sha256; local sha256_hmac = require "util.hashes".hmac_sha256; local nameprep = require "util.encodings".stringprep.nameprep; +local uuid_gen = require"util.uuid".generate; local xmlns_stream = "http://etherx.jabber.org/streams"; local dialback_requests = setmetatable({}, { __mode = 'v' }); +local dialback_secret = sha256_hash(module:get_option_string("dialback_secret", uuid_gen()), true); +local dwd = module:get_option_boolean("dialback_without_dialback", false); + +--- Helper to check that a session peer's certificate is valid +function check_cert_status(session) + local host = session.direction == "outgoing" and session.to_host or session.from_host + local conn = session.conn:socket() + local cert + if conn.getpeercertificate then + cert = conn:getpeercertificate() + end + + return module:fire_event("s2s-check-certificate", { host = host, session = session, cert = cert }); +end + + +function module.save() + return { dialback_secret = dialback_secret }; +end + +function module.restore(state) + dialback_secret = state.dialback_secret; +end + function generate_dialback(id, to, from) - return sha256_hmac(sha256_hash(hosts[from].dialback_secret), to .. ' ' .. from .. ' ' .. id, true); + return sha256_hmac(dialback_secret, to .. ' ' .. from .. ' ' .. id, true); end function initiate_dialback(session) -- generate dialback key session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); session.sends2s(st.stanza("db:result", { from = session.from_host, to = session.to_host }):text(session.dialback_key)); - session.log("info", "sent dialback key on outgoing s2s stream"); + session.log("debug", "sent dialback key on outgoing s2s stream"); end function verify_dialback(id, to, from, key) @@ -36,7 +61,7 @@ end module:hook("stanza/jabber:server:dialback:verify", function(event) local origin, stanza = event.origin, event.stanza; - + if origin.type == "s2sin_unauthed" or origin.type == "s2sin" then -- We are being asked to verify the key, to ensure it was generated by us origin.log("debug", "verifying that dialback key is ours..."); @@ -63,26 +88,36 @@ end); module:hook("stanza/jabber:server:dialback:result", function(event) local origin, stanza = event.origin, event.stanza; - + if origin.type == "s2sin_unauthed" or origin.type == "s2sin" then -- he wants to be identified through dialback -- We need to check the key with the Authoritative server local attr = stanza.attr; local to, from = nameprep(attr.to), nameprep(attr.from); - + if not hosts[to] then -- Not a host that we serve - origin.log("info", "%s tried to connect to %s, which we don't serve", from, to); + origin.log("warn", "%s tried to connect to %s, which we don't serve", from, to); origin:close("host-unknown"); return true; elseif not from then origin:close("improper-addressing"); end - + + if dwd and origin.secure then + if check_cert_status(origin, from) == false then + return + elseif origin.cert_chain_status == "valid" and origin.cert_identity_status == "valid" then + origin.sends2s(st.stanza("db:result", { to = from, from = to, id = attr.id, type = "valid" })); + module:fire_event("s2s-authenticated", { session = origin, host = from }); + return true; + end + end + origin.hosts[from] = { dialback_key = stanza[1] }; - + dialback_requests[from.."/"..origin.streamid] = origin; - + -- COMPAT: ejabberd, gmail and perhaps others do not always set 'to' and 'from' -- on streams. We fill in the session's to/from here instead. if not origin.from_host then @@ -103,7 +138,7 @@ end); module:hook("stanza/jabber:server:dialback:verify", function(event) local origin, stanza = event.origin, event.stanza; - + if origin.type == "s2sout_unauthed" or origin.type == "s2sout" then local attr = stanza.attr; local dialback_verifying = dialback_requests[attr.from.."/"..(attr.id or "")]; @@ -132,10 +167,10 @@ end); module:hook("stanza/jabber:server:dialback:result", function(event) local origin, stanza = event.origin, event.stanza; - + if origin.type == "s2sout_unauthed" or origin.type == "s2sout" then -- Remote server is telling us whether we passed dialback - + local attr = stanza.attr; if not hosts[attr.to] then origin:close("host-unknown"); @@ -154,14 +189,6 @@ module:hook("stanza/jabber:server:dialback:result", function(event) end end); -module:hook_stanza("urn:ietf:params:xml:ns:xmpp-sasl", "failure", function (origin, stanza) - if origin.external_auth == "failed" then - module:log("debug", "SASL EXTERNAL failed, falling back to dialback"); - initiate_dialback(origin); - return true; - end -end, 100); - module:hook_stanza(xmlns_stream, "features", function (origin, stanza) if not origin.external_auth or origin.external_auth == "failed" then module:log("debug", "Initiating dialback..."); |