Thread (16 messages) 16 messages, 6 authors, 2021-04-01

Fix hibernation in FIPS mode?

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From: Dexuan Cui <decui@microsoft.com>
Date: 2021-03-29 22:14:12
Also in: linux-pm, lkml

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?

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

Thanks,
-- Dexuan
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