From b1a00d8a4e4d1d0958805d2a05d357e47207e28f Mon Sep 17 00:00:00 2001 From: teldra Date: Tue, 4 Oct 2016 21:19:20 +0200 Subject: [PATCH] bitmask --- hashboot | 103 +++++++++++++++++++++++++++++++------------------------ 1 file changed, 58 insertions(+), 45 deletions(-) diff --git a/hashboot b/hashboot index c28083a..d78f0cf 100755 --- a/hashboot +++ b/hashboot @@ -12,7 +12,7 @@ # 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}" DIGEST_FILE="/var/lib/hashboot.digest" @@ -29,9 +29,11 @@ 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" - +#bitmask: +# 001=mbr +# 010=files +# 100=bios +CKMODES=011 #Umount /boot if we mounted it, exit with given exit code die () @@ -50,29 +52,30 @@ write_hashes () #Write header to ${1} echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${1} - case $test in - 1|4|5|7) + if [ $((${CKMODES} & 001)) != 0 ]; then #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) + ${HASHER} ${MBR_TMP} >> ${1} + fi + 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 [ ! ${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 + fi + fi } + #If we're not root: exit -if [ ${UID} -ne 0 ] +if [ ${UID} != "0" ] then die 4 "You have to be root" fi @@ -111,11 +114,14 @@ else 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 + read prompt + while [[ ! $prompt == "y" || $prompt == "Y" || $prompt == "n" || $prompt == "N" ]]; do + read prompt + done + if [ "${prompt}" == "y" ]; then if which flashrom; then flashrom - echo -n "Which programmer? (eg. internal)" + echo -n "Which programmer? (eg. internal) " read p echo "PROGRAMMER=${p}" >> ${CONFIG_FILE} else @@ -125,18 +131,28 @@ else else echo "PROGRAMMER=no" >> ${CONFIG_FILE} fi + echo "What do we check?" + echo "001=mbr" + echo "010=files" + echo "100=bios" + echo "eg. 101 for mbr and bios: " + read CKMODES + echo "CKMODES=$CKMODES" >> ${CONFIG_FILE} else 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 "test=5" >> ${CONFIG_FILE} + echo "CKMODES=$CKMODES" >> ${CONFIG_FILE} echo "PROGRAMMER=${PROGRAMMER}" >> ${CONFIG_FILE} fi fi -case $test in - 1|4|5|7) +if [ "${2}" > "1" ]; then + CKMODES=${2} +fi + +if [ $((${CKMODES} & 001)) != 0 ]; then # 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 @@ -156,7 +172,7 @@ case $test in 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 ${BACKUP_FILE}" fi -;; esac +fi if [ "${1}" == "index" ] then @@ -205,37 +221,34 @@ elif [ "${1}" == "check" ] then [ -f ${DIGEST_FILE} ] || die 9 "No digestfile" HASHER=$(head -n1 ${DIGEST_FILE} | awk '{print $5}') - case $test in - 1|4|5|7) + if [ $((${CKMODES} & 001)) != 0 ]; then 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 + 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 ;; esac - case $test in - 2|4|6|7) + fi + fi + if [ $((${CKMODES} & 010)) != 0 ]; then 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 - - + 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" ] then echo "Restoring files from backup... (type yes or no for each file)"