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-rw-r--r--plugins/mod_dialback.lua69
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...");