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 base64 = require "base64"
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");
local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
-local new_connhandler = require "net.connhandlers".new;
local new_sasl = require "util.sasl".new;
-add_handler("c2s_unauthed", "auth",
- 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);
- end
- session.sasl_handler = nil;
- session.connhandler = new_connhandler("xmpp-client", session);
- session.notopen = true;
- 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);
- else
- error("Client tried to negotiate SASL again", 0);
- end
-
- end);
-
+local function build_reply(status, ret, err_msg)
+ local reply = st.stanza(status, {xmlns = xmlns_sasl});
+ if status == "challenge" then
+ reply:text(base64.encode(ret or ""));
+ elseif status == "failure" then
+ reply:tag(ret):up();
+ if err_msg then reply:tag("text"):text(err_msg); end
+ elseif status == "success" then
+ reply:text(base64.encode(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(node, host, mechanism)
+ 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 "md5".sum(node..":"..host..":"..password);
+ end
+ end
+ return func, nil;
+end
+
+function sasl_handler(session, stanza)
+ if stanza.name == "auth" then
+ -- FIXME ignoring duplicates because ejabberd does
+ session.sasl_handler = new_sasl(stanza.attr.mechanism, session.host, password_callback);
+ elseif not session.sasl_handler then
+ return; -- FIXME ignoring out of order stanzas because ejabberd does
+ end
+ 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, err_msg = session.sasl_handler:feed(text);
+ handle_status(session, status);
+ local s = build_reply(status, ret, err_msg);
+ log("debug", "sasl reply: "..tostring(s));
+ session.send(s);
+end
+
+add_handler("c2s_unauthed", "auth", xmlns_sasl, sasl_handler);
+add_handler("c2s_unauthed", "abort", xmlns_sasl, sasl_handler);
+add_handler("c2s_unauthed", "response", xmlns_sasl, sasl_handler);
+
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>");
projects / prosody.git / blobdiff