Add utility functions for checking whether a process should be
considered privileged.

Add predicate function for checking whether dispatched dsme
message originates from privileged client (or dsme itself).

Make it possible to mark D-Bus method calls served by dsme as
privileged and send access denied error reply if such method
is called from an unpriviliged client.

Do not trigger vibration feedback when shutdown/reboot requests
are received, so that vibration occurs only when such requests
are accepted.

Move legacy aegis credential check delay in dsmetool so that it
happens on disconnect rather than on connect. While such delay
is not necessary anymore, having it occur just before exit allows
dsme side diagnostic logging to have access to client details.

Signed-off-by: Simo Piiroinen <simo.piiroinen@jolla.com>

…52494

Mark set_locked method call as privileged.

Signed-off-by: Simo Piiroinen <simo.piiroinen@jolla.com>

Before accepting requests that can cause shutdown or reboot, check
that they originate from privileged client (or dsme itself).

Signed-off-by: Simo Piiroinen <simo.piiroinen@jolla.com>

Mark shutdown, reboot and powerup method calls as privileged.

Signed-off-by: Simo Piiroinen <simo.piiroinen@jolla.com>

Method call message dispatching logic assumes that something went wrong
if handler callback does not provide reply message and sends a generic
error reply. Some handlers never fill in reply and this causes false
negative error replies to be sent to clients.

Return empty reply message even if handler does not have any specific
value to return to avoid confusion at client end.

Signed-off-by: Simo Piiroinen <simo.piiroinen@jolla.com>

Need to link with utility object, and that in turn contains encrypted home
partition checks that need libcryptsetup.

Signed-off-by: Simo Piiroinen <simo.piiroinen@jolla.com>

Allow only privileged clients to reboot device / modify aboot settings

See merge request mer-core/dsme!46