[pkg-cryptsetup-devel] Bug#994682: cryptsetup-initramfs: Poweroff timeout for cryptroot

Roland Tapken debian at tmp.dau-sicher.de
Sun Sep 19 12:35:25 BST 2021


Package: cryptsetup-initramfs
Version: 2.3.5
Severity: wishlist

If someone is using an encrypted root fs, and the laptop unintentionally turns 
on, it would wait for the passphrase until the battery is empty (that's what 
happened to me yesterday).

For this reason please let me suggest to add a timeout option into crypttab, 
which will turn the system off if the passphrase (or the key) has not been 
provided within the given period of time.

I've added a proof-of-concept patch to /usr/share/initramfs-tools/scripts/
local-top/cryptroot and /usr/lib/cryptsetup/functions which introduced this 
feature.

I know that there is a similar report #509070 from 2008, but while that 
reports suggests to skip the device for convenience reasons, my report is to 
protecting the system's battery.

Best regards,

Roland
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