this post was submitted on 05 Sep 2024
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[Question] Encrypted Partition Unlock via Root Unlocking (programming.dev)
submitted 2 months ago by recursive_recursion@programming.dev to c/linux@programming.dev
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cross-posted from: https://programming.dev/post/19007507

For context:
I've encrypted the swap partition with:

cryptsetup -v luksFormat /dev/${DEVICE}
cryptsetup luksOpen /dev/${DEVICE} swap

And what I want is for the user to be able to enter their password only once to decrypt their root partition which would contain a keyfile to then decrypt their swap partition.

Does anyone know if this is possible?
Just thought I'd ask to see if anyone's done this already

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[–] Klaymore@sh.itjust.works 2 points 2 months ago

I have home and root partitions encrypted with LUKS, and since they use the same password it automatically unlocks both of them. I think it tries using the first successful password to unlock the other partitions.