diff options
Diffstat (limited to 'plugins')
| -rw-r--r-- | plugins/mod_saslauth.lua | 107 |
1 files changed, 75 insertions, 32 deletions
diff --git a/plugins/mod_saslauth.lua b/plugins/mod_saslauth.lua index 24c82a1c..2a1485d0 100644 --- a/plugins/mod_saslauth.lua +++ b/plugins/mod_saslauth.lua @@ -2,10 +2,12 @@ local st = require "util.stanza"; local send = require "core.sessionmanager".send_to_session; local sm_bind_resource = require "core.sessionmanager".bind_resource; +local jid local usermanager_validate_credentials = require "core.usermanager".validate_credentials; local t_concat, t_insert = table.concat, table.insert; local tostring = tostring; +local jid_split = require "util.jid".split local log = require "util.logger".init("mod_saslauth"); @@ -15,50 +17,91 @@ local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas'; local new_sasl = require "util.sasl".new; +local function build_reply(status, ret) + local reply = st.stanza(status, {xmlns = xmlns_sasl}); + if status == "challenge" then + reply:text(ret or ""); + elseif status == "failure" then + reply:tag(ret):up(); + elseif status == "success" then + reply:text(ret or ""); + else + error("Unknown sasl status: "..status); + end + return reply; +end + +local function handle_status(session, status) + if status == "failure" then + session.sasl_handler = nil; + elseif status == "success" then + if not session.sasl_handler.username then error("SASL succeeded but we didn't get a username!"); end -- TODO move this to sessionmanager + sessionmanager.make_authenticated(session, session.sasl_handler.username); + session.sasl_handler = nil; + session:reset_stream(); + end +end + +local function password_callback(jid, mechanism) + local node, host = jid_split(jid); + local password = (datamanager.load(node, host, "accounts") or {}).password; -- FIXME handle hashed passwords + local func = function(x) return x; end; + if password then + if mechanism == "PLAIN" then + return func, password; + elseif mechanism == "DIGEST-MD5" then + return func, require "hashes".md5(node.."::"..password); + end + end + return func, nil; +end + +function do_sasl(session, stanza) + local text = stanza[1]; + if text then + text = base64.decode(text); + if not text then + session.sasl_handler = nil; + session.send(build_reply("failure", "incorrect-encoding")); + return; + end + end + local status, ret = session.sasl_handler:feed(text); + handle_status(session, status); + local s = build_reply(status, ret); + log("debug", "sasl reply: "..tostring(s)); + session.send(s); +end + add_handler("c2s_unauthed", "auth", xmlns_sasl, function (session, stanza) if not session.sasl_handler then - session.sasl_handler = new_sasl(stanza.attr.mechanism, - function (username, password) - -- onAuth - require "core.usermanager" - if usermanager_validate_credentials(session.host, username, password) then - return true; - end - return false; - end, - function (username) - -- onSuccess - local success, err = sessionmanager.make_authenticated(session, username); - if not success then - sessionmanager.destroy_session(session); - return; - end - session.sasl_handler = nil; - session:reset_stream(); - end, - function (reason) - -- onFail - log("debug", "SASL failure, reason: %s", reason); - end, - function (stanza) - -- onWrite - log("debug", "SASL writes: %s", tostring(stanza)); - send(session, stanza); - end - ); - session.sasl_handler:feed(stanza); + session.sasl_handler = new_sasl(stanza.attr.mechanism, session.host, password_callback); + do_sasl(session, stanza); else error("Client tried to negotiate SASL again", 0); end - end); - + +add_handler("c2s_unauthed", "abort", xmlns_sasl, + function(session, stanza) + if not session.sasl_handler then error("Attempt to abort when sasl has not started"); end + do_sasl(session, stanza); + end); + +add_handler("c2s_unauthed", "response", xmlns_sasl, + function(session, stanza) + if not session.sasl_handler then error("Attempt to respond when sasl has not started"); end + do_sasl(session, stanza); + end); + add_event_hook("stream-features", function (session, features) if not session.username then t_insert(features, "<mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>"); + -- TODO: Provide PLAIN only if TLS is active, this is a SHOULD from the introduction of RFC 4616. This behavior could be overridden via configuration but will issuing a warning or so. t_insert(features, "<mechanism>PLAIN</mechanism>"); + t_insert(features, "<mechanism>DIGEST-MD5</mechanism>"); t_insert(features, "</mechanisms>"); else t_insert(features, "<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'><required/></bind>"); |