Ubuntu setup for Clevis

setup-clevis.sh

# credit: https://askubuntu.com/a/1475182
# invoke with:
# curl -L https://gist.githubusercontent.com/heywoodlh/b55eb33e248db2b8a7625c1fddc6b8d3/raw/ce517a862ae4b4dd0c7a60912df22c5bcb10d736/setup-clevis.sh -o /tmp/setup-clevis.sh
# sudo bash /tmp/setup-clevis.sh /dev/sda3

disk="$1"
[[ ! -n "${disk}" ]] && echo "Usage: $0 /dev/sda3" && exit 1
[[ -n "${disk}" ]] && [[ ! -e "${disk}" ]] && echo "Disk ${disk} does not exist. Exiting." && exit 1

#install needed packages
apt-get -y install clevis clevis-tpm2 clevis-luks clevis-initramfs initramfs-tools tss2
        
#proceed
echo -n Enter LUKS password:
read -s LUKSKEY
echo ""
        
clevis luks bind -d ${disk} tpm2 '{"pcr_bank":"sha256"}' <<< "$LUKSKEY"
        
update-initramfs -u -k all
        
#check
clevis luks list -d ${disk}

#delete example; -s is one of the slots reported by the previous command
#clevis luks unbind -d /dev/nvme0n1p3 -s 1 tpm2