On Tue, Jan 3, 2023 at 1:05 PM William Roberts <bill.c.roberts@xxxxxxxxx> wrote: > What's the use case of using the creation data and ticket in this > context? Who gets the > creationData and the ticket? > Could a user supplied outsideInfo work? IIRC I saw some patches flying around > where the sessions will get encrypted and presumably correctly as well. This > would allow the transfer of that outsideInfo, like the NV Index PCR value to > be included and integrity protected by the session HMAC. The goal is to ensure that the key was generated by the kernel. In the absence of the creation data, an attacker could generate a hibernation image using their own key and trick the kernel into resuming arbitrary code. We don't have any way to pass secret data from the hibernate kernel to the resume kernel, so I don't think there's any easy way to do it with outsideinfo.
