[PATCH encrypted swsusp 0/3] encrypted swsusp image

[PATCH encrypted swsusp 0/3] encrypted swsusp image

[Andreas Steinmetz]

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 robotrap@domdv.de

Re: [PATCH encrypted swsusp 0/3] encrypted swsusp image

[folkert]

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> 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.

What about an option for an user-defined key? One that can be set when
suspending?


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Re: [PATCH encrypted swsusp 0/3] encrypted swsusp image

[Pavel Machek]

Hi!

> > 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.
> 
> What about an option for an user-defined key? One that can be set when
> suspending?

That's logical next step, but lets try to solve one problem at a time.

								Pavel
-- 
Boycott Kodak -- for their patent abuse against Java.