X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=plugins%2Fmod_dialback.lua;h=f0fe949aef8d2b91049dd32666da7a6b51187316;hb=873005c41b407731d759be423c51cb251346c0ae;hp=5d32fdb2f76392d18f70d11ecbe56e863b418389;hpb=c474226929d3c1adec8e9a229a5095e4970009ac;p=prosody.git diff --git a/plugins/mod_dialback.lua b/plugins/mod_dialback.lua index 5d32fdb2..f0fe949a 100644 --- a/plugins/mod_dialback.lua +++ b/plugins/mod_dialback.lua @@ -1,35 +1,46 @@ -- 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 format = string.format; - local hosts = _G.hosts; -local s2s_make_authenticated = require "core.s2smanager".make_authenticated; local log = module._log; 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 check_cert_status = module:depends"s2s".check_cert_status; +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); + +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_hash(id..to..from..hosts[from].dialback_secret, 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(format("%s", session.from_host, session.to_host, session.dialback_key)); - session.log("info", "sent dialback key on outgoing s2s stream"); + session.sends2s(st.stanza("db:result", { from = session.from_host, to = session.to_host }):text(session.dialback_key)); + session.log("debug", "sent dialback key on outgoing s2s stream"); end function verify_dialback(id, to, from, key) @@ -38,11 +49,16 @@ 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..."); local attr = stanza.attr; + if attr.type then + module:log("warn", "Ignoring incoming session from %s claiming a dialback key for %s is %s", + origin.from_host or "(unknown)", attr.from or "(unknown)", attr.type); + return true; + end -- 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; @@ -60,63 +76,71 @@ 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; - origin.hosts[attr.from] = { dialback_key = stanza[1] }; - - if not hosts[attr.to] then + 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", attr.from, attr.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 - - dialback_requests[attr.from.."/"..origin.streamid] = origin; - - if not origin.from_host then - -- Just used for friendlier logging - origin.from_host = nameprep(attr.from); - -- COMPAT: Fix ejabberd chopness by resetting the send function - if not origin.from_host then - origin.log("debug", "We need to know where to connect but remote server blindly refuses to tell us and to comply to specs, closing connection."); - origin:close("invalid-from"); - else - origin.log("debug", "Remote server didn't specify a from attr, resetting session.send now that we know where to knock to."); - origin.send = function(stanza) hosts[attr.to].events.fire_event("route/remote", { from_host = origin.to_host, to_host = origin.from_host, stanza = stanza}); 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 + origin.from_host = from; + end if not origin.to_host then - -- Just used for friendlier logging - origin.to_host = attr.to; + origin.to_host = to; end - - origin.log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]); - origin.send(st.stanza("db:verify", { from = attr.to, to = attr.from, id = origin.streamid }):text(stanza[1])); + + origin.log("debug", "asking %s if key %s belongs to them", from, stanza[1]); + module:fire_event("route/remote", { + from_host = to, to_host = from; + stanza = st.stanza("db:verify", { from = to, to = from, id = origin.streamid }):text(stanza[1]); + }); return true; end 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 "")]; - 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 - s2s_make_authenticated(dialback_verifying, attr.from); + module:fire_event("s2s-authenticated", { session = dialback_verifying, host = attr.from }); valid = "valid"; else -- Warn the original connection that is was not verified successfully - log("warn", "authoritative server for "..(attr.from or "(unknown)").." denied the key"); + log("warn", "authoritative server for %s denied the key", attr.from or "(unknown)"); valid = "invalid"; end - if not dialback_verifying.sends2s then + if dialback_verifying.destroyed then log("warn", "Incoming s2s session %s was closed in the meantime, so we can't notify it of the db result", tostring(dialback_verifying):match("%w+$")); else dialback_verifying.sends2s( @@ -131,10 +155,10 @@ 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"); @@ -145,7 +169,7 @@ module:hook("stanza/jabber:server:dialback:result", function(event) return true; end if stanza.attr.type == "valid" then - s2s_make_authenticated(origin, attr.from); + module:fire_event("s2s-authenticated", { session = origin, host = attr.from }); else origin:close("not-authorized", "dialback authentication failed"); end @@ -153,14 +177,6 @@ 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..."); @@ -169,7 +185,7 @@ module:hook_stanza(xmlns_stream, "features", function (origin, stanza) end end, 100); -module:hook("s2s-authenticate-legacy", function (event) +module:hook("s2sout-authenticate-legacy", function (event) module:log("debug", "Initiating dialback..."); initiate_dialback(event.origin); return true;