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64 lines
1.5 KiB
Bash
Executable File
64 lines
1.5 KiB
Bash
Executable File
#!/bin/sh
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# Generate a TPM key used to unlock LUKS disks
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set -e -o pipefail
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. /etc/functions
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lvm_volume_group=""
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while getopts "p:d:l:" arg; do
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case $arg in
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p) paramsdir="$OPTARG" ;;
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d) paramsdev="$OPTARG" ;;
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l) lvm_volume_group="$OPTARG" ;;
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esac
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done
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shift `expr $OPTIND - 1`
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key_devices="$@"
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if [ -z "$paramsdir" ]; then
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die "Usage: $0 -p /boot/ [-l qubes_dom0] [/dev/sda2 /dev/sda5 ...] "
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fi
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if [ -z "$paramsdev" ]; then
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paramsdev="$paramsdir"
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fi
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if [ -n "$lvm_volume_group" ]; then
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lvm vgchange -a y $lvm_volume_group \
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|| die "Failed to activate the LVM group"
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for dev in /dev/$lvm_volume_group/*; do
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key_devices="$key_devices $dev"
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done
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fi
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if [ -z "$key_devices" ]; then
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die "No devices specified for TPM key insertion"
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fi
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# try to switch to rw mode
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mount -o rw,remount $paramsdev
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rm -f $paramsdir/kexec_key_lvm.txt || true
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if [ -n "$lvm_volume_group" ]; then
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echo "$lvm_volume_group" > $paramsdir/kexec_key_lvm.txt \
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|| die "Failed to write lvm group to key config "
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fi
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rm -f $paramsdir/kexec_key_devices.txt || true
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for dev in "$key_devices"; do
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uuid=`cryptsetup luksUUID "$dev" 2>/dev/null` \
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|| die "Failed to get UUID for device $dev"
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echo "$dev $uuid" >> $paramsdir/kexec_key_devices.txt \
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|| die "Failed to add $dev:$uuid to key devices config"
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done
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kexec-seal-key $paramsdir \
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|| die "Failed to save and generate key in TPM"
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# sign and auto-roll config counter
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kexec-sign-config -p $paramsdir -u \
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|| die "Failed to sign updated config"
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# switch back to ro mode
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mount -o ro,remount $paramsdev
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