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