Re: Fix hibernation in FIPS mode?

[Rafael J. Wysocki]

On Tue, Mar 30, 2021 at 12:14 AM Dexuan Cui <decui@xxxxxxxxxxxxx> wrote:
>
> Hi,
> MD5 was marked incompliant with FIPS in 2009:
> a3bef3a31a19 ("crypto: testmgr - Skip algs not flagged fips_allowed in fips mode")
> a1915d51e8e7 ("crypto: testmgr - Mark algs allowed in fips mode")
>
> But hibernation_e820_save() is still using MD5, and fails in FIPS mode
> due to the 2018 patch:
> 749fa17093ff ("PM / hibernate: Check the success of generating md5 digest before hibernation")
>
> As a result, hibernation doesn't work when FIPS is on.
>
> Do you think if hibernation_e820_save() should be changed to use a
> FIPS-compliant algorithm like SHA-1?

I would say yes, it should.

> PS, currently it looks like FIPS mode is broken in the mainline:
> https://www.mail-archive.com/linux-crypto@xxxxxxxxxxxxxxx/msg49414.html