initial commit

pull/1/head
tastytea 2015-06-05 14:04:44 +02:00
commit b13bf72db2
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.gitignore vendored Normal file
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*.sublime-*

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ChangeLog Normal file
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* 2015-06-05 tastytea <tastytea@tastytea.de>
Version 0.3
Recovery
* 2015-06-03 tastytea <tastytea@tastytea.de>
Version 0.2
Debian initscript (SysV-style)
Gentoo initscript (openrc)
Backup in /var/cache/bootbackup.tar.gz
* 2015-06-03 tastytea <tastytea@tastytea.de>
Version 0.1
Usable skript

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INSTALL Normal file
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* Make sure you have sha*sum or md5sum installed
* Make hashboot.sh executable
* Place hashboot.sh where it's needed

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README Normal file
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For build instruction see INSTALL.
Run "hashboot.sh index" to generate checksums for /boot
Run "hashboot.sh check" to check /boot
A backup is stored in /var/cache/bootbackup.tar.gz
Detailed documentation is in the sourcecode.

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TODO Normal file
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* SysV-style init scripts
* Systemd init script
* Gentoo ebuild
* Debian package
* Ubuntu package
* recovery

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hashboot.sh Executable file
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#!/bin/sh
#Hashes all files in /boot to check them during early boot
#Exit codes: 0 = success, 1 = wrong usage, 2 = not root, 3 = no hasher found, 4 = checksum mismatch
VERSION="0.3"
DIGEST_FILE="/var/lib/hashboot.digest"
LOG_FILE="/tmp/hashboot.log"
BACKUP_FILE="/var/cache/boot-backup.tar.gz"
HASHER=""
BOOT_MOUNTED=""
#Umount /boot if we mounted it, exit with given exit code
function die
{
if [ ! -z ${BOOT_MOUNTED} ]
then
umount /boot
fi
exit ${1}
}
#If we're not root: exit
if [ ${UID} -ne 0 ]
then
echo "You have to be root" >&2
die 2
fi
#Try different hashers, use the most secure
HASHER=$(/usr/bin/which --skip-dot --skip-tilde sha512sum 2> /dev/null)
test -z ${HASHER} && $(/usr/bin/which --skip-dot --skip-tilde sha384sum 2> /dev/null)
test -z ${HASHER} && $(/usr/bin/which --skip-dot --skip-tilde sha256sum 2> /dev/null)
test -z ${HASHER} && $(/usr/bin/which --skip-dot --skip-tilde sha224sum 2> /dev/null)
#It gets insecure below here, but better than nothing?
test -z ${HASHER} && $(/usr/bin/which --skip-dot --skip-tilde sha1sum 2> /dev/null)
test -z ${HASHER} && $(/usr/bin/which --skip-dot --skip-tilde md5sum 2> /dev/null)
#If we found no hasher: exit
if [ -z ${HASHER} ]
then
echo "No hash calculator found" >&2
die 3
fi
#If /boot is in fstab but not mounted: mount, mark as mounted
if grep -q '/boot.*noauto' /etc/fstab && ! grep -q /boot /etc/mtab
then
mount /boot
BOOT_MOUNTED=1
fi
if [ "${1}" == "index" ]
then
#Write header
echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${DIGEST_FILE}
#Write hashes of all regular files to ${DIGEST_FILE}
find /boot -type f -exec ${HASHER} --binary {} >> ${DIGEST_FILE} +
#Backup of good files
tar -czpPf ${BACKUP_FILE} /boot
die 0
elif [ "${1}" == "check" ]
then
if $(${HASHER} --check --warn --quiet --strict ${DIGEST_FILE} > ${LOG_FILE})
then
die 0
else
echo " !! TIME TO PANIK: A FILE WAS MODIFIED !!"
echo "Restoring files from backup... (type yes or no for each file)"
#For each failed file: ask if it should be recovered from backup
for file in $(cut -d: -f1 ${LOG_FILE})
do
tar -xzpPvwf ${BACKUP_FILE} ${file}
done
echo "Type reboot to reboot now, otherwise you get a shell"
read -r reboot
if [ ${reboot} == "reboot" ]
then
reboot
fi
die 4
fi
else
echo "Usage: ${0} index|check" >&2
die 1
fi

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initscript.debian Executable file
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#!/bin/sh
### BEGIN INIT INFO
# Provides: hashboot
# Required-Start: $mountall
# Required-Stop:
# Default-Start: S
# Default-Stop:
# Short-Description: Check integrity of files in /boot
### END INIT INFO
PATH=/sbin:/bin:/usr/bin
# See if hashboot.sh is accessible
test -x $(which hashboot.sh) || exit 0
case "$1" in
start)
log_daemon_msg "Checking integrity of files in /boot"
if ! hashboot.sh check
then
log_end_msg 1
sh
exit 1
fi
log_end_msg 0
;;
stop)
# No-op
;;
restart|reload|force-reload|status)
echo "Error: argument '$1' not supported" >&2
exit 2
;;
*)
echo "Usage: /etc/init.d/hashboot {start|stop}"
exit 2
;;
esac
exit 0

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initscript.gentoo Executable file
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#!/sbin/runscript
description="Check integrity of files in /boot"
depend()
{
need localmount
}
start()
{
ebegin "Checking integrity of files in /boot"
# See if hashboot.sh is accessible
which hashboot.sh > /dev/null || return 1
if ! hashboot.sh check
then
sh
return 2
fi
eend 0
}