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hashboot
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Debian 7 compatible

This commit is contained in:
tastytea 2015-09-30 02:13:16 +02:00
parent a0d103a256
commit f846a6155e
2 changed files with 12 additions and 11 deletions
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1
hashboot-9999.ebuild
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@ -17,6 +17,7 @@ RDEPEND="
sys-apps/findutils
sys-apps/grep
virtual/awk
app-shells/bash
"
DEPEND="${RDEPEND}
"

22
hashboot.sh
View File

@ -1,4 +1,4 @@
#!/bin/sh
#!/bin/bash
#Hashes all files in /boot to check them during early boot
#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,
@ -18,7 +18,7 @@ CONFIG_FILE="/etc/hashboot.cfg"
#Umount /boot if we mounted it, exit with given exit code
function die
die ()
{
if [ ${BOOT_MOUNTED} -gt 0 ]
then
@ -46,15 +46,15 @@ fi
if [ "${1}" == "index" ]
then
#Try different hashers, use the most secure
HASHER=$(/usr/bin/which --skip-dot sha512sum 2> /dev/null)
test -z ${HASHER} && HASHER=$(/usr/bin/which --skip-dot sha384sum 2> /dev/null)
test -z ${HASHER} && HASHER=$(/usr/bin/which --skip-dot sha256sum 2> /dev/null)
test -z ${HASHER} && HASHER=$(/usr/bin/which --skip-dot sha224sum 2> /dev/null)
HASHER=$(/usr/bin/which sha512sum 2> /dev/null)
test -z "${HASHER}" && HASHER=$(/usr/bin/which sha384sum 2> /dev/null)
test -z "${HASHER}" && HASHER=$(/usr/bin/which sha256sum 2> /dev/null)
test -z "${HASHER}" && HASHER=$(/usr/bin/which sha224sum 2> /dev/null)
#It gets insecure below here, but better than nothing?
test -z ${HASHER} && HASHER=$(/usr/bin/which --skip-dot sha1sum 2> /dev/null)
test -z ${HASHER} && HASHER=$(/usr/bin/which --skip-dot md5sum 2> /dev/null)
test -z "${HASHER}" && HASHER=$(/usr/bin/which sha1sum 2> /dev/null)
test -z "${HASHER}" && HASHER=$(/usr/bin/which md5sum 2> /dev/null)
#If we found no hasher: exit
[ -z ${HASHER} ] && die 5 "No hash calculator found"
[ -z "${HASHER}" ] && die 5 "No hash calculator found"
#Look for config file and set ${MBR_DEVICE}.
if [ -f ${CONFIG_FILE} ]
@ -73,7 +73,7 @@ then
#Write header
echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${DIGEST_FILE}
#Write MBR of MBR_DEVICE to ${DIGEST_FILE}
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=1M count=1 status=none || die 8
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=1M count=1 status=noxfer || die 8
#Write hashes of all regular files to ${DIGEST_FILE}
${HASHER} ${MBR_TMP} >> ${DIGEST_FILE}
find /boot -type f -exec ${HASHER} --binary {} >> ${DIGEST_FILE} +
@ -97,7 +97,7 @@ then
COUNTER=0
HASHER=$(head -n1 ${DIGEST_FILE} | awk '{print $5}')
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=1M count=1 status=none || die 8
dd if=${MBR_DEVICE} of=${MBR_TMP} bs=1M count=1 status=noxfer || die 8
if ! $(grep ${MBR_TMP} ${DIGEST_FILE} | ${HASHER} --check --warn --quiet --strict > ${LOG_FILE})
then
echo " !! TIME TO PANIK: MBR WAS MODIFIED !!"