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I recently tried adding a FIDO2-Device as an unlocking method to the LUKS2 partition containing my Fedora install. When trying to do this, I stumbled upon the here edited man files detailing how to do this. I however could not unlock my partition with my FIDO2-Device after editing /etc/crypttab and rebooting. As I found out after a while, I needed to regenerate / update my currently running / used initramfs (https://unix.stackexchange.com/a/705809). This would have most likely solved itself for me with the next kernel update install (as far as I understand). So I propose changing the files edited here to recommend or at least inform the user about this.
38 lines
1.5 KiB
Bash
38 lines
1.5 KiB
Bash
# SPDX-License-Identifier: MIT-0
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# Destroy any old key on the Yubikey (careful!)
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ykman piv reset
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# Generate a new private/public key pair on the device, store the public key in
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# 'pubkey.pem'.
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ykman piv generate-key -a RSA2048 9d pubkey.pem
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# Create a self-signed certificate from this public key, and store it on the
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# device. The "subject" should be an arbitrary user-chosen string to identify
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# the token with.
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ykman piv generate-certificate --subject "Knobelei" 9d pubkey.pem
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# We don't need the public key anymore, let's remove it. Since it is not
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# security sensitive we just do a regular "rm" here.
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rm pubkey.pem
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# Enroll the freshly initialized security token in the LUKS2 volume. Replace
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# /dev/sdXn by the partition to use (e.g. /dev/sda1).
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sudo systemd-cryptenroll --pkcs11-token-uri=auto /dev/sdXn
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# Test: Let's run systemd-cryptsetup to test if this all worked.
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sudo /usr/lib/systemd/systemd-cryptsetup attach mytest /dev/sdXn - pkcs11-uri=auto
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# If that worked, let's now add the same line persistently to /etc/crypttab,
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# for the future.
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sudo bash -c 'echo "mytest /dev/sdXn - pkcs11-uri=auto" >>/etc/crypttab'
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# Depending on your distribution and encryption setup, you may need
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# to manually regenerate your initramfs to be able to use a
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# Yubikey / PKCS#11 Token to unlock the partition during early boot.
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# More information at https://unix.stackexchange.com/a/705809
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# On Fedora based systems:
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sudo dracut --force
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# On Debian based systems:
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sudo update-initramfs -u
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