-- Prosody IM
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
---
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
-local new_sasl = require "util.sasl".new;
+local new_sasl
+if config.get(module:get_host(), "core", "cyrus_service_name") then
+ cyrus_new = require "util.sasl_cyrus".new;
+ new_sasl = function(realm)
+ return cyrus_new(realm, config.get(module:get_host(), "core", "cyrus_service_name"))
+ end
+else
+ new_sasl = require "util.sasl".new;
+end
+
+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});
local function handle_status(session, status)
if status == "failure" then
- session.sasl_handler = nil;
+ session.sasl_handler = session.sasl_handler:clean_clone();
elseif status == "success" then
local username = nodeprep(session.sasl_handler.username);
- session.sasl_handler = nil;
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();
return;
- end
- sm_make_authenticated(session, username);
- session:reset_stream();
- end
-end
-
-local function credentials_callback(mechanism, ...)
- if mechanism == "PLAIN" then
- local username, hostname, password = ...;
- username = nodeprep(username);
- if not username then
- return false;
- end
- local response = usermanager_validate_credentials(hostname, username, password, mechanism);
- if response == nil then
- return false;
- else
- return response;
- end
- elseif mechanism == "DIGEST-MD5" then
- local function func(x) return x; end
- local node, domain, realm, decoder = ...;
- local prepped_node = nodeprep(node);
- if not prepped_node then
- return func, nil;
- end
- local password = usermanager_get_password(prepped_node, domain);
- if password then
- if decoder then
- node, realm, password = decoder(node), decoder(realm), decoder(password);
- end
- return func, md5(node..":"..realm..":"..password);
- else
- return func, nil;
end
+ sm_make_authenticated(session, session.sasl_handler.username);
+ session.sasl_handler = nil;
+ session:reset_stream();
end
end
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
+ if secure_auth_only and not session.secure then
+ return session.send(build_reply("failure", "encryption-required"));
+ end
elseif not session.sasl_handler then
return; -- FIXME ignoring out of order stanzas because ejabberd does
end
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
- local mechanisms = usermanager_get_supported_methods(session.host or "*");
- for k, v in pairs(mechanisms) do
- features:tag("mechanism"):text(k):up();
- end
+ if module:get_option("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 (module:get_option("allow_unencrypted_plain_auth")) and 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();
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