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90 lines
2.4 KiB
Bash
Executable File
90 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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# Generate a TPM key used to unlock LUKS disks
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. /etc/functions
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TRACE "kexec-save-key: start"
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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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skip_sign="n"
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while getopts "sp:d:l:" arg; do
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case $arg in
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s) skip_sign="y" ;;
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p) paramsdir="$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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DEBUG "kexec-save-key prior of parsing: paramsdir: $paramsdir, paramsdev: $paramsdev, lvm_volume_group: $lvm_volume_group"
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shift $(expr $OPTIND - 1)
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key_devices="$@"
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DEBUG "kexec-save-key: key_devices: $key_devices"
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if [ -z "$paramsdir" ]; then
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die "Usage: $0 [-s] -p /boot [-l qubes_dom0] [/dev/sda2 /dev/sda5 ...] "
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fi
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if [ -z "$paramsdev" ]; then
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paramsdev="$paramsdir"
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DEBUG "kexec-save-key: paramsdev modified to : $paramsdev"
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fi
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paramsdev="${paramsdev%%/}"
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paramsdir="${paramsdir%%/}"
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DEBUG "kexec-save-key prior of last override: paramsdir: $paramsdir, paramsdev: $paramsdev, lvm_volume_group: $lvm_volume_group"
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if [ -n "$lvm_volume_group" ]; then
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lvm vgchange -a y $lvm_volume_group ||
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die "Failed to activate the LVM group"
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#TODO: why reuse key_devices for lvm devices?
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for dev in /dev/$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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DEBUG "kexec-save-key saving under $paramsdir/kexec_key_lvm.txt : lvm_volume_group: $lvm_volume_group"
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echo "$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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DEBUG "Getting UUID for $dev"
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uuid=$(cryptsetup luksUUID "$dev" 2>/dev/null) ||
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die "Failed to get UUID for device $dev"
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DEBUG "Saving under $paramsdir/kexec_key_devices.txt : dev: $dev, uuid: $uuid"
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echo "$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 $paramsdir ||
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die "Failed to save and generate TPM Disk Unlock Key"
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if [ "$skip_sign" != "y" ]; then
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extparam=
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if [ "$CONFIG_IGNORE_ROLLBACK" != "y" ]; then
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extparam=-r
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fi
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# sign and auto-roll config counter
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kexec-sign-config -p $paramsdir $extparam ||
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die "Failed to sign updated config"
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fi
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# switch back to ro mode
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mount -o ro,remount $paramsdev
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