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0cae2d7805
Add CONFIG_TPM_NO_LUKS_DISK_UNLOCK to allow Librem boards to opt out of using TPM to store LUKS key, and use it to guard the user option to add the disk encryption key to the TPM. Select this option for all Librem boards; all other boards which select CONFIG_TPM=y will have no change in functionality. Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
142 lines
3.3 KiB
Bash
Executable File
142 lines
3.3 KiB
Bash
Executable File
#!/bin/sh
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# Save these options to be the persistent default
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set -e -o pipefail
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. /tmp/config
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. /etc/functions
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while getopts "b:d:p:i:" arg; do
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case $arg in
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b) bootdir="$OPTARG" ;;
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d) paramsdev="$OPTARG" ;;
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p) paramsdir="$OPTARG" ;;
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i) index="$OPTARG" ;;
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esac
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done
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if [ -z "$bootdir" -o -z "$index" ]; then
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die "Usage: $0 -b /boot -i menu_option "
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fi
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if [ -z "$paramsdev" ]; then
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paramsdev="$bootdir"
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fi
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if [ -z "$paramsdir" ]; then
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paramsdir="$bootdir"
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fi
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bootdir="${bootdir%%/}"
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paramsdev="${paramsdev%%/}"
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paramsdir="${paramsdir%%/}"
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TMP_MENU_FILE="/tmp/kexec/kexec_menu.txt"
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ENTRY_FILE="$paramsdir/kexec_default.$index.txt"
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HASH_FILE="$paramsdir/kexec_default_hashes.txt"
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if [ ! -r "$TMP_MENU_FILE" ]; then
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die "No menu options available, please run kexec-select-boot"
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fi
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entry=`head -n $index $TMP_MENU_FILE | tail -1`
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if [ -z "$entry" ]; then
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die "Invalid menu index $index"
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fi
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KEY_DEVICES="$paramsdir/kexec_key_devices.txt"
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KEY_LVM="$paramsdir/kexec_key_lvm.txt"
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save_key="n"
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if [[ "$CONFIG_TPM" = "y" && "$CONFIG_TPM_NO_LUKS_DISK_UNLOCK" != "y" ]]; then
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if [ ! -r "$KEY_DEVICES" ]; then
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read \
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-n 1 \
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-p "Do you wish to add a disk encryption to the TPM [y/N]: " \
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add_key_confirm
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echo
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if [ "$add_key_confirm" = "y" \
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-o "$add_key_confirm" = "Y" ]; then
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lvm_suggest="e.g. qubes_dom0 or blank"
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devices_suggest="e.g. /dev/sda2 or blank"
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save_key="y"
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fi
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else
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read \
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-n 1 \
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-p "Do you want to reseal a disk key to the TPM [y/N]: " \
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change_key_confirm
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echo
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if [ "$change_key_confirm" = "y" \
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-o "$change_key_confirm" = "Y" ]; then
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old_lvm_volume_group=""
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if [ -r "$KEY_LVM" ]; then
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old_lvm_volume_group=`cat $KEY_LVM` || true
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old_key_devices=`cat $KEY_DEVICES \
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| cut -d\ -f1 \
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| grep -v "$old_lvm_volume_group" \
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| xargs` || true
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else
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old_key_devices=`cat $KEY_DEVICES \
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| cut -d\ -f1 | xargs` || true
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fi
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lvm_suggest="was '$old_lvm_volume_group'"
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devices_suggest="was '$old_key_devices'"
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save_key="y"
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fi
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fi
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if [ "$save_key" = "y" ]; then
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echo "+++ LVM volume groups (lvm vgscan): "
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lvm vgscan || true
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read \
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-p "Encrypted LVM group? ($lvm_suggest): " \
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lvm_volume_group
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echo "+++ Block devices (blkid): "
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blkid || true
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read \
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-p "Encrypted devices? ($devices_suggest): " \
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key_devices
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save_key_params="-s -p $paramsdev"
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if [ -n "$lvm_volume_group" ]; then
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save_key_params="$save_key_params -l $lvm_volume_group $key_devices"
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else
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save_key_params="$save_key_params $key_devices"
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fi
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echo "Running kexec-save-key with params: $save_key_params"
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kexec-save-key $save_key_params \
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|| die "Failed to save the disk key"
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fi
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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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if [ ! -d $paramsdir ]; then
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mkdir -p $paramsdir \
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|| die "Failed to create params directory"
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fi
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rm "$paramsdir/kexec_default.*.txt" 2>/dev/null || true
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echo "$entry" > $ENTRY_FILE
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cd $bootdir && kexec-boot -b "$bootdir" -e "$entry" -f | \
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xargs sha256sum > $HASH_FILE \
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|| die "Failed to create hashes of boot files"
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if [ ! -r $ENTRY_FILE -o ! -r $HASH_FILE ]; then
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die "Failed to write default config"
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fi
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# sign and auto-roll config counter
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extparam=
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if [ "$CONFIG_TPM" = "y" ]; then
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extparam=-u
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fi
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kexec-sign-config -p $paramsdir $extparam \
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|| die "Failed to sign default config"
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# switch back to ro mode
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mount -o ro,remount $paramsdev
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