mirror of https://schlomp.space/tastytea/hashboot
Initial modular
teldra
parent
37a4399293
commit
391983a659
80
hashboot
80
hashboot
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@ -29,6 +29,9 @@ CONFIG_FILE="/etc/hashboot.cfg"
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COUNTER=0
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DD_STATUS="none"
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PROGRAMMER="no" #standard change enables bios mode
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#1=mbr 2=files 3=bios 4=mbr/files 5=mbr/bios 6=files/bios 7=all
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test="5"
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#Umount /boot if we mounted it, exit with given exit code
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die ()
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@ -46,17 +49,26 @@ write_hashes ()
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{
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#Write header to ${1}
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echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${1}
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#Write MBR of MBR_DEVICE to ${1}
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case $test in
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1|4|5|7)
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#copy mbr to file
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dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8
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#Write bios to ${1}
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#if we set an programmer chip in config, read bios and write it to digestfile.
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#Write hash of MBR to ${1}
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${HASHER} ${MBR_TMP} >> ${1} ;; esac
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case $test in
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3|5|6|7)
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#if we set an programmer chip in config
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if [ ! ${PROGRAMMER} == "no" ]; then
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#read bios to file
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flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1
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#and write hashes of bios files to ${1}
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${HASHER} ${BIOS_TMP} >> ${1}
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fi
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fi ;; esac
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case $test in
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2|4|6|7)
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#Write hashes of all regular files to ${1}
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${HASHER} ${MBR_TMP} >> ${1}
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find /boot -type f -exec ${HASHER} --binary {} >> ${1} +
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find /boot -type f -exec ${HASHER} --binary {} >> ${1} + ;; esac
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}
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#If we're not root: exit
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@ -118,29 +130,33 @@ else
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echo "MBR_DEVICE=${MBR_DEVICE}" >> ${CONFIG_FILE}
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echo "#Where the Backup files are stored" >> ${CONFIG_FILE}
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echo "BACKUP_FILE=${BACKUP_FILE}" >> ${CONFIG_FILE}
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echo "test=5" >> ${CONFIG_FILE}
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echo "PROGRAMMER=${PROGRAMMER}" >> ${CONFIG_FILE}
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fi
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fi
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# Find out where the first partition starts and set ${MBR_SIZE} in KiB
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sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $8}' )
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if [ "${sectorsize}" == "=" ] # Older versions of util-linux
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then
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case $test in
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1|4|5|7)
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# Find out where the first partition starts and set ${MBR_SIZE} in KiB
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sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $8}' )
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if [ "${sectorsize}" == "=" ] # Older versions of util-linux
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then
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sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $9}' )
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fi
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startsector=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep -A1 'Device' | tail -n1 | awk '{print $2}' )
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if [ "${startsector}" == "*" ] # If partition is marked as boot, read next field
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then
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fi
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startsector=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep -A1 'Device' | tail -n1 | awk '{print $2}' )
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if [ "${startsector}" == "*" ] # If partition is marked as boot, read next field
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then
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startsector=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep -A1 'Device' | tail -n1 | awk '{print $3}' )
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fi
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fi
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MBR_SIZE=$(expr ${sectorsize} \* ${startsector} / 1024)
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MBR_SIZE=$(expr ${sectorsize} \* ${startsector} / 1024)
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if [ ${?} != 0 ]
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then
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if [ ${?} != 0 ]
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then
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echo "Something went wrong. Most likely your partition table is corrupt." >&2
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die 1 "You have to recover the MBR manually by copying the mbr from ${BACKUP_FILE}"
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fi
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fi
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;; esac
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if [ "${1}" == "index" ]
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then
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@ -189,19 +205,18 @@ elif [ "${1}" == "check" ]
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then
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[ -f ${DIGEST_FILE} ] || die 9 "No digestfile"
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HASHER=$(head -n1 ${DIGEST_FILE} | awk '{print $5}')
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case $test in
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1|4|5|7)
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dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8
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flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1
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if ! grep ${MBR_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict | tee ${LOG_FILE}
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then
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echo " !! TIME TO PANIK: MBR WAS MODIFIED !!"
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COUNTER=$((COUNTER + 1))
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fi
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if ! grep -v ${MBR_TMP} ${DIGEST_FILE} | grep -v ${BIOS_TMP} | ${HASHER} --check --warn --quiet --strict | tee -a ${LOG_FILE}
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then
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echo " !! TIME TO PANIK: AT LEAST 1 FILE WAS MODIFIED !!"
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COUNTER=$((COUNTER + 2))
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die $COUNTER
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fi
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fi;; esac
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case $test in
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3|5|6|7)
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flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1
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#if we set an programmer chip in config, find line with hash for bios and compare. if smthg wrong, panic
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if [ ! ${PROGRAMMER} == "no" ]; then
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if grep ${BIOS_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict | tee -a ${LOG_FILE}
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@ -210,7 +225,16 @@ then
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COUNTER=$((COUNTER + 10))
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die $COUNTER
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fi
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fi
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fi ;; esac
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case $test in
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2|4|6|7)
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if ! grep -v ${MBR_TMP} ${DIGEST_FILE} | grep -v ${BIOS_TMP} | ${HASHER} --check --warn --quiet --strict | tee -a ${LOG_FILE}
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then
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echo " !! TIME TO PANIK: AT LEAST 1 FILE WAS MODIFIED !!"
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COUNTER=$((COUNTER + 2))
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die $COUNTER
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fi ;; esac
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elif [ "${1}" == "recover" ]
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then
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