On Di, 2018-07-24 at 00:23 +0800, Yu Chen wrote: > Hi, > On Mon, Jul 23, 2018 at 01:42:36PM +0200, Oliver Neukum wrote: > > On Fr, 2018-07-20 at 12:25 +0200, Pavel Machek wrote: > > > So your goal is to make hibernation compatible with kernel > > > lockdown? Do your patches provide sufficient security that hibernation > > > can be enabled with kernel lockdown? > > > > OK, maybe I am dense, but if the key comes from user space, will that > > be enough? > > > > 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. It seems to me that your initial reasoning was correct and the key should be generated in kernel space. Regards Oliver
