mirror of https://schlomp.space/tastytea/hashboot
bitmask
teldra
parent
391983a659
commit
b1a00d8a4e
103
hashboot
103
hashboot
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@ -12,7 +12,7 @@
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# meet some day, and you think this stuff is worth it, you can give us a hug. #
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###################################################################################
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VERSION="0.9.0"
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VERSION="0.9.1"
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PATH="/bin:/usr/bin:/sbin:/usr/sbin:${PATH}"
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DIGEST_FILE="/var/lib/hashboot.digest"
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@ -29,9 +29,11 @@ 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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#bitmask:
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# 001=mbr
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# 010=files
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# 100=bios
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CKMODES=011
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#Umount /boot if we mounted it, exit with given exit code
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die ()
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@ -50,29 +52,30 @@ write_hashes ()
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#Write header to ${1}
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echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${1}
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case $test in
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1|4|5|7)
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if [ $((${CKMODES} & 001)) != 0 ]; then
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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 hash of MBR to ${1}
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${HASHER} ${MBR_TMP} >> ${1} ;; esac
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case $test in
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3|5|6|7)
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${HASHER} ${MBR_TMP} >> ${1}
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fi
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if [ $((${CKMODES} & 010)) != 0 ]; then
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#Write hashes of all regular files to ${1}
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find /boot -type f -exec ${HASHER} --binary {} >> ${1} +
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fi
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if [ $((${CKMODES} & 100)) != 0 ]; then
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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 ;; 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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find /boot -type f -exec ${HASHER} --binary {} >> ${1} + ;; esac
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fi
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fi
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}
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#If we're not root: exit
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if [ ${UID} -ne 0 ]
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if [ ${UID} != "0" ]
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then
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die 4 "You have to be root"
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fi
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@ -111,11 +114,14 @@ else
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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 -n "Include BIOS check? (y/n)"
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read b
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if [ ${b} == "y"]; then
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read prompt
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while [[ ! $prompt == "y" || $prompt == "Y" || $prompt == "n" || $prompt == "N" ]]; do
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read prompt
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done
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if [ "${prompt}" == "y" ]; then
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if which flashrom; then
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flashrom
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echo -n "Which programmer? (eg. internal)"
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echo -n "Which programmer? (eg. internal) "
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read p
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echo "PROGRAMMER=${p}" >> ${CONFIG_FILE}
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else
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@ -125,18 +131,28 @@ else
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else
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echo "PROGRAMMER=no" >> ${CONFIG_FILE}
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fi
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echo "What do we check?"
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echo "001=mbr"
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echo "010=files"
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echo "100=bios"
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echo "eg. 101 for mbr and bios: "
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read CKMODES
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echo "CKMODES=$CKMODES" >> ${CONFIG_FILE}
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else
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echo "#Device with the MBR on it" > ${CONFIG_FILE}
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echo "MBR_DEVICE=${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" >> ${CONFIG_FILE}
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echo "CKMODES=$CKMODES" >> ${CONFIG_FILE}
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echo "PROGRAMMER=${PROGRAMMER}" >> ${CONFIG_FILE}
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fi
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fi
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case $test in
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1|4|5|7)
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if [ "${2}" > "1" ]; then
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CKMODES=${2}
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fi
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if [ $((${CKMODES} & 001)) != 0 ]; then
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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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@ -156,7 +172,7 @@ case $test in
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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 ${BACKUP_FILE}"
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fi
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;; esac
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fi
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if [ "${1}" == "index" ]
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then
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@ -205,37 +221,34 @@ 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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if [ $((${CKMODES} & 001)) != 0 ]; then
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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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if ! grep ${MBR_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict | tee ${LOG_FILE}
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then
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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;; 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 ${LOG_FILE}
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then
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echo " !! TIME TO PANIK: BIOS WAS MODIFIED !!"
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COUNTER=$((COUNTER + 10))
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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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2|4|6|7)
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fi
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fi
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if [ $((${CKMODES} & 010)) != 0 ]; then
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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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fi
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fi
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if [ $((${CKMODES} & 100)) != 0 ]; then
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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 ${LOG_FILE}
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then
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echo " !! TIME TO PANIK: BIOS WAS MODIFIED !!"
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COUNTER=$((COUNTER + 10))
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die $COUNTER
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fi
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fi
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fi
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elif [ "${1}" == "recover" ]
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then
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echo "Restoring files from backup... (type yes or no for each file)"
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