The dbus specification states that its authentication mechanism is a SASL profile.
Unless (empty) data is provided with the mechanism right away (i.e. AUTH ANONYMOUS),
SASL compliant authentication responds with a DATA message.
While some dbus implementations do not do this, the sd-bus does as of systemd >=v242-rc1 [0].
This fixes the response in a backward compatible way by sending back an empty DATA message.
The dbus specification states that its authentication mechanism is a SASL profile.
Unless (empty) data is provided with the mechanism right away (i.e.
AUTH ANONYMOUS), SASL compliant authentication responds with aDATAmessage. While some dbus implementations do not do this, the sd-bus does as of systemd >=v242-rc1 [0].This fixes the response in a backward compatible way by sending back an empty
DATAmessage.[0] https://github.com/systemd/systemd/commit/2010873b4b49b223e0cc07d28205b09c693ef005