The following patches allow for encryption of the on-disk swsusp image
to prevent data gathering of e.g. in-kernel keys or mlocked data after
resume.
For this purpose the aes cipher must be compiled into the kernel as
module load is not possible at resume time.
A random key is generated at suspend time, stored in the suspend header
on disk and deleted from the header at resume time. If you don't resume
a mkswap on the suspend partition will also delete the temporary key.
Only the data pages are encrypted as only these may contain sensitive data.
This works on my x86_64 laptop (64bit mode) and probably needs testing
on other platforms.
--
Andreas Steinmetz SPAMmers use [email protected]
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