local sm_make_authenticated = require "core.sessionmanager".make_authenticated;
local base64 = require "util.encodings".base64;
+local nodeprep = require "util.encodings".stringprep.nodeprep;
local datamanager_load = require "util.datamanager".load;
local usermanager_validate_credentials = require "core.usermanager".validate_credentials;
local usermanager_get_supported_methods = require "core.usermanager".get_supported_methods;
local md5 = require "util.hashes".md5;
local config = require "core.configmanager";
-local secure_auth_only = config.get(module:get_host(), "core", "require_encryption");
+local secure_auth_only = config.get(module:get_host(), "core", "c2s_require_encryption") or config.get(module:get_host(), "core", "require_encryption");
local log = module._log;
local new_sasl = require "util.sasl".new;
+default_authentication_profile = {
+ plain = function(username, realm)
+ local prepped_username = nodeprep(username);
+ if not prepped_username then
+ log("debug", "NODEprep failed on username: %s", username);
+ return "", nil;
+ end
+ local password = usermanager_get_password(prepped_username, realm);
+ if not password then
+ return "", nil;
+ end
+ return password, true;
+ end
+};
+
+anonymous_authentication_profile = {
+ anonymous = function(username, realm)
+ return true; -- for normal usage you should always return true here
+ end
+}
+
local function build_reply(status, ret, err_msg)
local reply = st.stanza(status, {xmlns = xmlns_sasl});
if status == "challenge" then
if status == "failure" then
session.sasl_handler = nil;
elseif status == "success" then
- if not session.sasl_handler.username then -- TODO move this to sessionmanager
+ local username = nodeprep(session.sasl_handler.username);
+ if not username then -- TODO move this to sessionmanager
module:log("warn", "SASL succeeded but we didn't get a username!");
session.sasl_handler = nil;
session:reset_stream();
end
end
-local function credentials_callback(mechanism, ...)
- if mechanism == "PLAIN" then
- local username, hostname, password = arg[1], arg[2], arg[3];
- local response = usermanager_validate_credentials(hostname, username, password, mechanism)
- if response == nil then return false
- else return response end
- elseif mechanism == "DIGEST-MD5" then
- function func(x) return x; end
- local node, domain, realm, decoder = arg[1], arg[2], arg[3], arg[4];
- local password = usermanager_get_password(node, domain)
- if decoder then node, realm, password = decoder(node), decoder(realm), decoder(password); end
- return func, md5(node..":"..realm..":"..password);
- end
-end
-
local function sasl_handler(session, stanza)
if stanza.name == "auth" then
-- FIXME ignoring duplicates because ejabberd does
elseif stanza.attr.mechanism == "ANONYMOUS" then
return session.send(build_reply("failure", "mechanism-too-weak"));
end
- session.sasl_handler = new_sasl(stanza.attr.mechanism, session.host, credentials_callback);
- if not session.sasl_handler then
+ local valid_mechanism = session.sasl_handler:select(stanza.attr.mechanism);
+ if not valid_mechanism then
return session.send(build_reply("failure", "invalid-mechanism"));
end
elseif not session.sasl_handler then
return;
end
end
- local status, ret, err_msg = session.sasl_handler:feed(text);
+ local status, ret, err_msg = session.sasl_handler:process(text);
handle_status(session, status);
local s = build_reply(status, ret, err_msg);
log("debug", "sasl reply: %s", tostring(s));
if secure_auth_only and not session.secure then
return;
end
- features:tag("mechanisms", mechanisms_attr);
- -- 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.
- if config.get(session.host or "*", "core", "anonymous_login") then
- features:tag("mechanism"):text("ANONYMOUS"):up();
- else
- mechanisms = usermanager_get_supported_methods(session.host or "*");
- for k, v in pairs(mechanisms) do
- features:tag("mechanism"):text(k):up();
- end
+ if config.get(session.host or "*", "core", "anonymous_login") then
+ session.sasl_handler = new_sasl(session.host, anonymous_authentication_profile);
+ else
+ session.sasl_handler = new_sasl(session.host, default_authentication_profile);
+ if not session.secure then
+ session.sasl_handler:forbidden({"PLAIN"});
end
+ end
+ features:tag("mechanisms", mechanisms_attr);
+ for k, v in pairs(session.sasl_handler:mechanisms()) do
+ features:tag("mechanism"):text(v):up();
+ end
features:up();
else
features:tag("bind", bind_attr):tag("required"):up():up();
- features:tag("session", xmpp_session_attr):up();
+ features:tag("session", xmpp_session_attr):tag("optional"):up():up();
end
end);