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teldra 2016-10-04 20:49:35 +02:00
parent 37a4399293
commit 391983a659
1 changed files with 73 additions and 49 deletions
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hashboot
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@ -29,6 +29,9 @@ CONFIG_FILE="/etc/hashboot.cfg"
COUNTER=0
DD_STATUS="none"
PROGRAMMER="no" #standard change enables bios mode
#1=mbr 2=files 3=bios 4=mbr/files 5=mbr/bios 6=files/bios 7=all
test="5"
#Umount /boot if we mounted it, exit with given exit code
die ()
@ -46,17 +49,26 @@ write_hashes ()
{
#Write header to ${1}
echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${1}
#Write MBR of MBR_DEVICE to ${1}
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8
#Write bios to ${1}
#if we set an programmer chip in config, read bios and write it to digestfile.
if [ ! ${PROGRAMMER} == "no" ]; then
flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1
${HASHER} ${BIOS_TMP} >> ${1}
fi
#Write hashes of all regular files to ${1}
${HASHER} ${MBR_TMP} >> ${1}
find /boot -type f -exec ${HASHER} --binary {} >> ${1} +
case $test in
1|4|5|7)
#copy mbr to file
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8
#Write hash of MBR to ${1}
${HASHER} ${MBR_TMP} >> ${1} ;; esac
case $test in
3|5|6|7)
#if we set an programmer chip in config
if [ ! ${PROGRAMMER} == "no" ]; then
#read bios to file
flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1
#and write hashes of bios files to ${1}
${HASHER} ${BIOS_TMP} >> ${1}
fi ;; esac
case $test in
2|4|6|7)
#Write hashes of all regular files to ${1}
find /boot -type f -exec ${HASHER} --binary {} >> ${1} + ;; esac
}
#If we're not root: exit
@ -118,29 +130,33 @@ else
echo "MBR_DEVICE=${MBR_DEVICE}" >> ${CONFIG_FILE}
echo "#Where the Backup files are stored" >> ${CONFIG_FILE}
echo "BACKUP_FILE=${BACKUP_FILE}" >> ${CONFIG_FILE}
echo "test=5" >> ${CONFIG_FILE}
echo "PROGRAMMER=${PROGRAMMER}" >> ${CONFIG_FILE}
fi
fi
# Find out where the first partition starts and set ${MBR_SIZE} in KiB
sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $8}' )
if [ "${sectorsize}" == "=" ] # Older versions of util-linux
then
sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $9}' )
fi
startsector=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep -A1 'Device' | tail -n1 | awk '{print $2}' )
if [ "${startsector}" == "*" ] # If partition is marked as boot, read next field
then
startsector=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep -A1 'Device' | tail -n1 | awk '{print $3}' )
fi
case $test in
1|4|5|7)
# Find out where the first partition starts and set ${MBR_SIZE} in KiB
sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $8}' )
if [ "${sectorsize}" == "=" ] # Older versions of util-linux
then
sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $9}' )
fi
startsector=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep -A1 'Device' | tail -n1 | awk '{print $2}' )
if [ "${startsector}" == "*" ] # If partition is marked as boot, read next field
then
startsector=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep -A1 'Device' | tail -n1 | awk '{print $3}' )
fi
MBR_SIZE=$(expr ${sectorsize} \* ${startsector} / 1024)
MBR_SIZE=$(expr ${sectorsize} \* ${startsector} / 1024)
if [ ${?} != 0 ]
then
echo "Something went wrong. Most likely your partition table is corrupt." >&2
die 1 "You have to recover the MBR manually by copying the mbr from ${BACKUP_FILE}"
fi
if [ ${?} != 0 ]
then
echo "Something went wrong. Most likely your partition table is corrupt." >&2
die 1 "You have to recover the MBR manually by copying the mbr from ${BACKUP_FILE}"
fi
;; esac
if [ "${1}" == "index" ]
then
@ -189,28 +205,36 @@ elif [ "${1}" == "check" ]
then
[ -f ${DIGEST_FILE} ] || die 9 "No digestfile"
HASHER=$(head -n1 ${DIGEST_FILE} | awk '{print $5}')
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8
flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1
if ! grep ${MBR_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict | tee ${LOG_FILE}
then
echo " !! TIME TO PANIK: MBR WAS MODIFIED !!"
COUNTER=$((COUNTER + 1))
fi
if ! grep -v ${MBR_TMP} ${DIGEST_FILE} | grep -v ${BIOS_TMP} | ${HASHER} --check --warn --quiet --strict | tee -a ${LOG_FILE}
then
echo " !! TIME TO PANIK: AT LEAST 1 FILE WAS MODIFIED !!"
COUNTER=$((COUNTER + 2))
die $COUNTER
fi
#if we set an programmer chip in config, find line with hash for bios and compare. if smthg wrong, panic
if [ ! ${PROGRAMMER} == "no" ]; then
if grep ${BIOS_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict | tee -a ${LOG_FILE}
then
echo " !! TIME TO PANIK: BIOS WAS MODIFIED !!"
COUNTER=$((COUNTER + 10))
die $COUNTER
case $test in
1|4|5|7)
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8
if ! grep ${MBR_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict | tee ${LOG_FILE}
then
echo " !! TIME TO PANIK: MBR WAS MODIFIED !!"
COUNTER=$((COUNTER + 1))
fi;; esac
case $test in
3|5|6|7)
flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1
#if we set an programmer chip in config, find line with hash for bios and compare. if smthg wrong, panic
if [ ! ${PROGRAMMER} == "no" ]; then
if grep ${BIOS_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict | tee -a ${LOG_FILE}
then
echo " !! TIME TO PANIK: BIOS WAS MODIFIED !!"
COUNTER=$((COUNTER + 10))
die $COUNTER
fi
fi
fi ;; esac
case $test in
2|4|6|7)
if ! grep -v ${MBR_TMP} ${DIGEST_FILE} | grep -v ${BIOS_TMP} | ${HASHER} --check --warn --quiet --strict | tee -a ${LOG_FILE}
then
echo " !! TIME TO PANIK: AT LEAST 1 FILE WAS MODIFIED !!"
COUNTER=$((COUNTER + 2))
die $COUNTER
fi ;; esac
elif [ "${1}" == "recover" ]
then