Send cookies to webui-vue from Sessions POST
Using Redfish-standard X-Auth-Token authentication is less secure
(against injected JS code) compared to an HttpOnly (not available to the
JS VM) SESSION cookie. Currently webui-vue authenticates connections to
WebSocket URIs not only by a JS-accessible token (passed as subprotocol
when upgrading to WS) but also via a SESSION cookie (even though it is
not subject to CORS policy).
To allow WebSocket-based functionality (IP KVM, SOL, VM) after creating
a Session object send a set of cookies instead of the X-Auth-Token
header if the request was made by webui-vue (detected by presence of
"X-Requested-With" header).
Factor out cookie setting and clearing functions and use explicit Path=/
attribute as the cookies are valid for the whole server, not just the
path of the endpoint they were created by.
Not specifying Path was functional for /login endpoint because
https://www.rfc-editor.org/rfc/rfc6265#section-5.3 point 7 for this case
says "set the cookie's path to the default-path of the request-uri" and
https://www.rfc-editor.org/rfc/rfc6265#section-5.1.4 tells how to
compute the default path. Basically, it was a "happy coincidence" that
/login defaults to / for the Path, if it was /openbmc/login then the
cookies would have been set to Path=/openbmc and not work at all for
/redfish/v1 endpoints.
Tested: Redfish-Service-Validator doesn't see a difference. Runtime
testing logging in via Sessions endpoint, getting data, using websockets
and logging out against webui-vue with a corresponding change while
carefully observing Request and Response headers. Creating a session
with curl without the special header shows just X-Auth-Token and no
cookies in the response.
Change-Id: I0b1774e586671874bb79f115e9cddf194f9ea653
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
diff --git a/include/cookies.hpp b/include/cookies.hpp
new file mode 100644
index 0000000..e66eec8
--- /dev/null
+++ b/include/cookies.hpp
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "http_response.hpp"
+#include "sessions.hpp"
+
+namespace bmcweb
+{
+
+inline void setSessionCookies(crow::Response& res,
+ const persistent_data::UserSession& session)
+{
+ res.addHeader(boost::beast::http::field::set_cookie,
+ "XSRF-TOKEN=" + session.csrfToken +
+ "; Path=/; SameSite=Strict; Secure");
+ res.addHeader(boost::beast::http::field::set_cookie,
+ "SESSION=" + session.sessionToken +
+ "; Path=/; SameSite=Strict; Secure; HttpOnly");
+}
+
+inline void clearSessionCookies(crow::Response& res)
+{
+ res.addHeader(boost::beast::http::field::set_cookie,
+ "SESSION="
+ "; Path=/; SameSite=Strict; Secure; HttpOnly; "
+ "expires=Thu, 01 Jan 1970 00:00:00 GMT");
+ res.addHeader("Clear-Site-Data", R"("cache","cookies","storage")");
+}
+
+} // namespace bmcweb