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hashboot
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teldra 2016-10-04 21:19:20 +02:00
parent 391983a659
commit b1a00d8a4e
1 changed files with 58 additions and 45 deletions
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hashboot
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@ -12,7 +12,7 @@
# meet some day, and you think this stuff is worth it, you can give us a hug. # # meet some day, and you think this stuff is worth it, you can give us a hug. #
################################################################################### ###################################################################################
VERSION="0.9.0" VERSION="0.9.1"
PATH="/bin:/usr/bin:/sbin:/usr/sbin:${PATH}" PATH="/bin:/usr/bin:/sbin:/usr/sbin:${PATH}"
DIGEST_FILE="/var/lib/hashboot.digest" DIGEST_FILE="/var/lib/hashboot.digest"
@ -29,9 +29,11 @@ CONFIG_FILE="/etc/hashboot.cfg"
COUNTER=0 COUNTER=0
DD_STATUS="none" DD_STATUS="none"
PROGRAMMER="no" #standard change enables bios mode PROGRAMMER="no" #standard change enables bios mode
#1=mbr 2=files 3=bios 4=mbr/files 5=mbr/bios 6=files/bios 7=all #bitmask:
test="5" # 001=mbr
# 010=files
# 100=bios
CKMODES=011
#Umount /boot if we mounted it, exit with given exit code #Umount /boot if we mounted it, exit with given exit code
die () die ()
@ -50,29 +52,30 @@ write_hashes ()
#Write header to ${1} #Write header to ${1}
echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${1} echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${1}
case $test in if [ $((${CKMODES} & 001)) != 0 ]; then
1|4|5|7)
#copy mbr to file #copy mbr to file
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8 dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8
#Write hash of MBR to ${1} #Write hash of MBR to ${1}
${HASHER} ${MBR_TMP} >> ${1} ;; esac ${HASHER} ${MBR_TMP} >> ${1}
case $test in fi
3|5|6|7) if [ $((${CKMODES} & 010)) != 0 ]; then
#Write hashes of all regular files to ${1}
find /boot -type f -exec ${HASHER} --binary {} >> ${1} +
fi
if [ $((${CKMODES} & 100)) != 0 ]; then
#if we set an programmer chip in config #if we set an programmer chip in config
if [ ! ${PROGRAMMER} == "no" ]; then if [ ! ${PROGRAMMER} == "no" ]; then
#read bios to file #read bios to file
flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1 flashrom --programmer ${PROGRAMMER} -r ${BIOS_TMP} > /dev/null 2>&1
#and write hashes of bios files to ${1} #and write hashes of bios files to ${1}
${HASHER} ${BIOS_TMP} >> ${1} ${HASHER} ${BIOS_TMP} >> ${1}
fi ;; esac fi
case $test in fi
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 #If we're not root: exit
if [ ${UID} -ne 0 ] if [ ${UID} != "0" ]
then then
die 4 "You have to be root" die 4 "You have to be root"
fi fi
@ -111,11 +114,14 @@ else
echo "#Where the Backup files are stored" >> ${CONFIG_FILE} echo "#Where the Backup files are stored" >> ${CONFIG_FILE}
echo "BACKUP_FILE=${BACKUP_FILE}" >> ${CONFIG_FILE} echo "BACKUP_FILE=${BACKUP_FILE}" >> ${CONFIG_FILE}
echo -n "Include BIOS check? (y/n)" echo -n "Include BIOS check? (y/n)"
read b read prompt
if [ ${b} == "y"]; then while [[ ! $prompt == "y" || $prompt == "Y" || $prompt == "n" || $prompt == "N" ]]; do
read prompt
done
if [ "${prompt}" == "y" ]; then
if which flashrom; then if which flashrom; then
flashrom flashrom
echo -n "Which programmer? (eg. internal)" echo -n "Which programmer? (eg. internal) "
read p read p
echo "PROGRAMMER=${p}" >> ${CONFIG_FILE} echo "PROGRAMMER=${p}" >> ${CONFIG_FILE}
else else
@ -125,18 +131,28 @@ else
else else
echo "PROGRAMMER=no" >> ${CONFIG_FILE} echo "PROGRAMMER=no" >> ${CONFIG_FILE}
fi fi
echo "What do we check?"
echo "001=mbr"
echo "010=files"
echo "100=bios"
echo "eg. 101 for mbr and bios: "
read CKMODES
echo "CKMODES=$CKMODES" >> ${CONFIG_FILE}
else else
echo "#Device with the MBR on it" > ${CONFIG_FILE} echo "#Device with the MBR on it" > ${CONFIG_FILE}
echo "MBR_DEVICE=${MBR_DEVICE}" >> ${CONFIG_FILE} echo "MBR_DEVICE=${MBR_DEVICE}" >> ${CONFIG_FILE}
echo "#Where the Backup files are stored" >> ${CONFIG_FILE} echo "#Where the Backup files are stored" >> ${CONFIG_FILE}
echo "BACKUP_FILE=${BACKUP_FILE}" >> ${CONFIG_FILE} echo "BACKUP_FILE=${BACKUP_FILE}" >> ${CONFIG_FILE}
echo "test=5" >> ${CONFIG_FILE} echo "CKMODES=$CKMODES" >> ${CONFIG_FILE}
echo "PROGRAMMER=${PROGRAMMER}" >> ${CONFIG_FILE} echo "PROGRAMMER=${PROGRAMMER}" >> ${CONFIG_FILE}
fi fi
fi fi
case $test in if [ "${2}" > "1" ]; then
1|4|5|7) CKMODES=${2}
fi
if [ $((${CKMODES} & 001)) != 0 ]; then
# Find out where the first partition starts and set ${MBR_SIZE} in KiB # 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 $8}' ) sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $8}' )
if [ "${sectorsize}" == "=" ] # Older versions of util-linux if [ "${sectorsize}" == "=" ] # Older versions of util-linux
@ -156,7 +172,7 @@ case $test in
echo "Something went wrong. Most likely your partition table is corrupt." >&2 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}" die 1 "You have to recover the MBR manually by copying the mbr from ${BACKUP_FILE}"
fi fi
;; esac fi
if [ "${1}" == "index" ] if [ "${1}" == "index" ]
then then
@ -205,37 +221,34 @@ elif [ "${1}" == "check" ]
then then
[ -f ${DIGEST_FILE} ] || die 9 "No digestfile" [ -f ${DIGEST_FILE} ] || die 9 "No digestfile"
HASHER=$(head -n1 ${DIGEST_FILE} | awk '{print $5}') HASHER=$(head -n1 ${DIGEST_FILE} | awk '{print $5}')
case $test in if [ $((${CKMODES} & 001)) != 0 ]; then
1|4|5|7)
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=${MBR_SIZE}K count=1 status=${DD_STATUS} || die 8 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} if ! grep ${MBR_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict | tee ${LOG_FILE}
then then
echo " !! TIME TO PANIK: MBR WAS MODIFIED !!" echo " !! TIME TO PANIK: MBR WAS MODIFIED !!"
COUNTER=$((COUNTER + 1)) COUNTER=$((COUNTER + 1))
fi;; esac fi
fi
case $test in if [ $((${CKMODES} & 010)) != 0 ]; then
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 ;; 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} if ! grep -v ${MBR_TMP} ${DIGEST_FILE} | grep -v ${BIOS_TMP} | ${HASHER} --check --warn --quiet --strict | tee -a ${LOG_FILE}
then then
echo " !! TIME TO PANIK: AT LEAST 1 FILE WAS MODIFIED !!" echo " !! TIME TO PANIK: AT LEAST 1 FILE WAS MODIFIED !!"
COUNTER=$((COUNTER + 2)) COUNTER=$((COUNTER + 2))
die $COUNTER die $COUNTER
fi ;; esac fi
fi
if [ $((${CKMODES} & 100)) != 0 ]; then
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 $COUNTER
fi
fi
fi
elif [ "${1}" == "recover" ] elif [ "${1}" == "recover" ]
then then
echo "Restoring files from backup... (type yes or no for each file)" echo "Restoring files from backup... (type yes or no for each file)"