Re: [PATCH 0/4][RFC v2] Introduce the in-kernel hibernation encryption

Oliver Neukum
2018-07-26T07:39:10Z

On Di, 2018-07-24 at 00:23 +0800, Yu Chen wrote:
>
> Good point, we once tried to generate key in kernel, but people
> suggest to generate key in userspace and provide it to the
> kernel, which is what ecryptfs do currently, so it seems this
> should also be safe for encryption in kernel.
> https://www.spinics.net/lists/linux-crypto/msg33145.html
> Thus Chun-Yi's signature can use EFI key and both the key from
> user space.

Hi,

ecryptfs can trust user space. It is supposed to keep data
safe while the system is inoperative. The whole point of Secure
Boot is a cryptographic system of trust that does not include
user space.

I seriously doubt we want to use trusted computing here. So the
key needs to be generated in kernel space and stored in a safe
manner. As we have a saolution doing that, can we come to ausable
synthesis?

Regards
Oliver