123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112 |
- #!/bin/bash -e
- # vim: set tabstop=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80:
- #
- # Copyright (c) 2017 Red Hat, Inc.
- # Author: Javier Martinez Canillas <javierm@redhat.com>
- #
- # This program is free software: you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation, either version 3 of the License, or
- # (at your option) any later version.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with this program. If not, see <http://www.gnu.org/licenses/>.
- #
- SUMMARY="Unbinds a pin bound to a LUKS volume"
- UUID=cb6e8904-81ff-40da-a84a-07ab9ab5715e
- function usage() {
- echo >&2
- echo "Usage: clevis luks unbind -d DEV -s SLT" >&2
- echo >&2
- echo "$SUMMARY": >&2
- echo >&2
- echo " -d DEV The bound LUKS device" >&2
- echo >&2
- echo " -s SLOT The LUKS slot number for the pin unbind" >&2
- echo >&2
- echo " -f Do not ask for confirmation and wipe slot in batch-mode" >&2
- echo >&2
- exit 1
- }
- if [ $# -eq 1 -a "$1" == "--summary" ]; then
- echo "$SUMMARY"
- exit 0
- fi
- while getopts ":d:s:f" o; do
- case "$o" in
- f) FRC=-q;;
- d) DEV=$OPTARG;;
- s) SLT=$OPTARG;;
- *) usage;;
- esac
- done
- if [ -z "$DEV" ]; then
- echo "Did not specify a device!" >&2
- usage
- fi
- if [ -z "$SLT" ]; then
- echo "Did not specify a slot!" >&2
- usage
- fi
- if cryptsetup isLuks --type luks1 "$DEV"; then
- if ! luksmeta test -d $DEV 2>/dev/null; then
- echo "The $DEV device does not contain a LUKSMeta header!" >&2
- exit 1
- fi
- read -r slot active uuid <<< $(luksmeta show -d "$DEV" | grep "^$SLT *")
- if [ "$uuid" == "empty" ]; then
- echo "The LUKSMeta slot $SLT on device $DEV is already empty." >&2
- exit 1
- fi
- [ "$active" == "active" ] && KILL=true
- elif cryptsetup isLuks --type luks2 "$DEV"; then
- dump=`cryptsetup luksDump "$DEV"`
- grep -q "^\s*$SLT: luks2" <<<"$dump" && KILL=true
- TOK=`grep -E -B1 "^\s+Keyslot:\s+$SLT$" <<<"$dump" \
- | sed -rn 's|^\s+([0-9]+): clevis|\1|p'`
- else
- echo "$DEV is not a supported LUKS device!" >&2
- exit 1
- fi
- if [ -z "$FRC" ]; then
- echo "The unbind operation will wipe a slot. This operation is unrecoverable." >&2
- read -r -p "Do you wish to erase LUKS slot $SLT on $DEV? [ynYN] " ans < /dev/tty
- [[ "$ans" =~ ^[yY]$ ]] || exit 0
- fi
- if [ -n "$KILL" ]; then
- if ! cryptsetup luksKillSlot "$DEV" "$SLT" $FRC; then
- echo "LUKS slot $SLT for device $DEV couldn't be deleted"
- exit 1
- fi
- fi
- if cryptsetup isLuks --type luks1 "$DEV"; then
- if ! luksmeta wipe -f -d "$DEV" -u "$UUID" -s "$SLT"; then
- echo "LUKSMeta slot $SLT for device $DEV couldn't be deleted"
- exit 1
- fi
- elif cryptsetup isLuks --type luks2 "$DEV" && [ -n "$TOK" ]; then
- if ! cryptsetup token remove --token-id "$TOK" "$DEV"; then
- echo "Error while removing token $TOK from LUKS device $DEV!" >&2
- exit 1
- fi
- fi
|