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Code Issues Projects Releases Wiki Activity

Adding support for BIOS. Mark I

pull/1/head
teldra 2016-09-26 17:37:51 +02:00
parent 74e7b939ee
commit ae1570378b
1 changed files with 48 additions and 12 deletions
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hashboot
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@ -3,7 +3,8 @@
#Exit codes: 0 = success, 1 = checksum mbr mismatch, 2 = checksum /boot mismatch,
#3 = checksum mbr/boot mismatch, 4 = not root, 5 = no hasher found, 6 = wrong usage,
#7 = write error, 8 = dd error, 9 = file not found
#10 = bios mismatch, 11 == mbr&bios mismatch, 12 = files&bios mismatch
#13 = mbr&bios&files mismatch
###################################################################################
# "THE HUG-WARE LICENSE" (Revision 1): #
# xo <xo@rotce.de> and tastytea <tastytea@tastytea.de> wrote these files. As long #
@ -11,7 +12,7 @@
# meet some day, and you think this stuff is worth it, you can give us a hug. #
###################################################################################
VERSION="0.8.3"
VERSION="0.9.0"
PATH="/bin:/usr/bin:/sbin:/usr/sbin:${PATH}"
DIGEST_FILE="/var/lib/hashboot.digest"
@ -20,12 +21,14 @@ LOG_FILE="/tmp/hashboot.log"
MBR_DEVICE="/dev/sda"
MBR_SIZE=1024
MBR_TMP="/tmp/mbr"
BIOS_TMP="/tmp/bios"
BACKUP_FILE="/var/cache/boot-backup.tar"
HASHER=""
BOOT_MOUNTED=0
CONFIG_FILE="/etc/hashboot.cfg"
COUNTER=0
DD_STATUS="none"
PROGRAMMER="no" #standard change enables bios mode
#Umount /boot if we mounted it, exit with given exit code
die ()
@ -45,11 +48,17 @@ write_hashes ()
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} +
}
#If we're not root: exit
if [ ${UID} -ne 0 ]
then
@ -83,17 +92,33 @@ else
[ -z "${MBR_DEVICE}" ] && MBR_DEVICE="/dev/sda"
echo "#Device with the MBR on it" > ${CONFIG_FILE}
echo "MBR_DEVICE=${MBR_DEVICE}" >> ${CONFIG_FILE}
echo -n "Where should backup file be stored? [/var/cache/boot-backup.tar] "
echo -n "Where should backup file be stored? [/var/cache/boot-backup.tar] "
read -r BACKUP_FILE
[ -z "${BACKUP_FILE}" ] && BACKUP_FILE="/var/cache/boot-backup.tar"
echo "#Where the Backup files are stored" >> ${CONFIG_FILE}
echo "BACKUP_FILE=${BACKUP_FILE}" >> ${CONFIG_FILE}
echo -n "Include BIOS check? (y/n)"
read b
if [ ${b} == "y"]; then
if which flashrom; then
flashrom
echo -n "Which programmer? (eg. internal)"
read p
echo "PROGRAMMER=${p}" >> ${CONFIG_FILE}
else
echo "No flashrom found. You need to install it."
echo "PROGRAMMER=${PROGRAMMER}" >> ${CONFIG_FILE}
fi
else
echo "PROGRAMMER=no" >> ${CONFIG_FILE}
fi
else
echo "#Device with the MBR on it" > ${CONFIG_FILE}
echo "MBR_DEVICE=${MBR_DEVICE}" >> ${CONFIG_FILE}
echo "#Where the Backup files are stored" >> ${CONFIG_FILE}
echo "BACKUP_FILE=${BACKUP_FILE}" >> ${CONFIG_FILE}
echo "PROGRAMMER=${PROGRAMMER}" >> ${CONFIG_FILE}
fi
fi
@ -129,7 +154,7 @@ then
test -z "${HASHER}" && HASHER=$(/usr/bin/which md5sum 2> /dev/null)
#If we found no hasher: exit
[ -z "${HASHER}" ] && die 5 "No hash calculator found"
#Exists ${DIGEST_FILE}, if true run do magic, else write ${DIGEST_FILE}
if [ -f ${DIGEST_FILE} ]
then
@ -142,9 +167,9 @@ then
then
die 0
else
for file in $(diff ${DIGEST_FILE} ${DIGEST_FILE_TMP} | grep -v '#hashboot' | grep '<' | cut -d'*' -f2 | sed 's/\ /\\ /g' );
do
#lösche_aus_tar
for file in $(diff ${DIGEST_FILE} ${DIGEST_FILE_TMP} | grep -v '#hashboot' | grep '<' | cut -d'*' -f2 | sed 's/\ /\\ /g' );
do
#delete from tar
tar --delete -v -P -f $BACKUP_FILE $file
done
for file in $(diff ${DIGEST_FILE} ${DIGEST_FILE_TMP} | grep -v '#hashboot' | grep '>' | cut -d'*' -f2 | sed 's/\ /\\ /g' );
@ -156,26 +181,37 @@ then
mv ${DIGEST_FILE_TMP} ${DIGEST_FILE}
else
write_hashes $DIGEST_FILE
tar -cpPf ${BACKUP_FILE} ${MBR_TMP} /boot ${DIGEST_FILE} || die 7 "Error writing ${BACKUP_FILE}"
tar -cpPf ${BACKUP_FILE} ${BIOS} ${MBR_TMP} /boot ${DIGEST_FILE} || die 7 "Error writing ${BACKUP_FILE}"
echo "Backup written to ${BACKUP_FILE}"
fi
elif [ "${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} | ${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 ${LOG_FILE}
then
echo " !! TIME TO PANIK: AT LEAST 1 FILE WAS MODIFIED !!"
COUNTER=$((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 $COUNTER
fi
fi
elif [ "${1}" == "recover" ]
then
echo "Restoring files from backup... (type yes or no for each file)"