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mod_dialback: import util.hashes and functionality once in s2smanager.

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This commit is contained in:
Florian Zeitz 2012-02-24 15:20:03 +00:00
parent 8f06587c50
commit 24bfbf5ce2
1 changed files with 23 additions and 7 deletions
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30
plugins/mod_dialback.lua
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@ -6,22 +6,37 @@
-- COPYING file in the source package for more information.
--
local format = string.format;
local hosts = _G.hosts;
local send_s2s = require "core.s2smanager".send_to_host;
local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
local s2s_initiate_dialback = require "core.s2smanager".initiate_dialback;
local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
local log = module._log;
local st = require "util.stanza";
local sha256_hash = require "util.hashes".sha256;
local xmlns_stream = "http://etherx.jabber.org/streams";
local xmlns_dialback = "jabber:server:dialback";
local dialback_requests = setmetatable({}, { __mode = 'v' });
function generate_dialback(id, to, from)
return sha256_hash(id..to..from..hosts[from].dialback_secret, true);
end
function initiate_dialback(session)
-- generate dialback key
session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host);
session.sends2s(format("<db:result from='%s' to='%s'>%s</db:result>", session.from_host, session.to_host, session.dialback_key));
session.log("info", "sent dialback key on outgoing s2s stream");
end
function verify_dialback(id, to, from, key)
return key == generate_dialback(id, to, from);
end
module:hook("stanza/jabber:server:dialback:verify", function(event)
local origin, stanza = event.origin, event.stanza;
@ -32,7 +47,7 @@ module:hook("stanza/jabber:server:dialback:verify", function(event)
-- COMPAT: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34
--if attr.from ~= origin.to_host then error("invalid-from"); end
local type;
if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then
if verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then
type = "valid"
else
type = "invalid"
@ -72,8 +87,8 @@ module:hook("stanza/jabber:server:dialback:result", function(event)
end
origin.log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]);
send_s2s(attr.to, attr.from,
st.stanza("db:verify", { from = attr.to, to = attr.from, id = origin.streamid }):text(stanza[1]));
--send_s2s(attr.to, attr.from,
origin.send(st.stanza("db:verify", { from = attr.to, to = attr.from, id = origin.streamid }):text(stanza[1]));
return true;
end
end);
@ -84,6 +99,7 @@ module:hook("stanza/jabber:server:dialback:verify", function(event)
if origin.type == "s2sout_unauthed" or origin.type == "s2sout" then
local attr = stanza.attr;
local dialback_verifying = dialback_requests[attr.from.."/"..(attr.id or "")];
module:log("debug", tostring(dialback_verifying).." "..attr.from.." "..origin.to_host);
if dialback_verifying and attr.from == origin.to_host then
local valid;
if attr.type == "valid" then
@ -134,14 +150,14 @@ 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");
s2s_initiate_dialback(origin);
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
s2s_initiate_dialback(origin);
initiate_dialback(origin);
return true;
end
end, 100);