#!/usr/bin/sh # Licensed under the GPLv2 # # Copyright (C) 2011 Politecnico di Torino, Italy # TORSEC group -- http://security.polito.it # Roberto Sassu <roberto.sassu@polito.it> MASTERKEYSCONFIG="${NEWROOT}/etc/sysconfig/masterkey" MULTIKERNELMODE="NO" PCRLOCKNUM=11 load_masterkey() { # read the configuration from the config file # shellcheck disable=SC1090 [ -f "${MASTERKEYSCONFIG}" ] \ && . "${MASTERKEYSCONFIG}" # override the kernel master key path name from the 'masterkey=' parameter # in the kernel command line MASTERKEYARG=$(getarg masterkey=) && MASTERKEY=${MASTERKEYARG} # override the kernel master key type from the 'masterkeytype=' parameter # in the kernel command line MASTERKEYTYPEARG=$(getarg masterkeytype=) && MASTERKEYTYPE=${MASTERKEYTYPEARG} # set default values [ -z "${MASTERKEYTYPE}" ] \ && MASTERKEYTYPE="trusted" if [ -z "${MASTERKEY}" ]; then # append the kernel version to the default masterkey path name # if MULTIKERNELMODE is set to YES if [ "${MULTIKERNELMODE}" = "YES" ]; then MASTERKEY="/etc/keys/kmk-${MASTERKEYTYPE}-$(uname -r).blob" else MASTERKEY="/etc/keys/kmk-${MASTERKEYTYPE}.blob" fi fi # set the kernel master key path name MASTERKEYPATH="${NEWROOT}${MASTERKEY}" # check for kernel master key's existence if [ ! -f "${MASTERKEYPATH}" ]; then if [ "${RD_DEBUG}" = "yes" ]; then info "masterkey: kernel master key file not found: ${MASTERKEYPATH}" fi return 1 fi # read the kernel master key blob KEYBLOB=$(cat "${MASTERKEYPATH}") # add the 'load' prefix if the key type is 'trusted' [ "${MASTERKEYTYPE}" = "trusted" ] \ && KEYBLOB="load ${KEYBLOB} pcrlock=${PCRLOCKNUM}" # load the kernel master key info "Loading the kernel master key" keyctl add "${MASTERKEYTYPE}" "kmk-${MASTERKEYTYPE}" "${KEYBLOB}" @u > /dev/null || { info "masterkey: failed to load the kernel master key: kmk-${MASTERKEYTYPE}" return 1 } return 0 } load_masterkey