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#!/bin/sh
#set -e
Verify_checksums ()
{
for _PARAMETER in ${LIVE_BOOT_CMDLINE}
do
case "${_PARAMETER}" in
live-boot.verify-checksums=*|verify-checksums=*)
LIVE_VERIFY_CHECKSUMS="true"
LIVE_VERIFY_CHECKSUMS_DIGESTS="${_PARAMETER#*verify-checksums=}"
;;
live-boot.verify-checksums|verify-checksums)
LIVE_VERIFY_CHECKSUMS="true"
;;
esac
done
case "${LIVE_VERIFY_CHECKSUMS}" in
true)
;;
*)
return 0
;;
esac
_MOUNTPOINT="${1}"
LIVE_VERIFY_CHECKSUMS_DIGESTS="${LIVE_VERIFY_CHECKSUMS_DIGESTS:-sha512 sha384 sha256 sha224 sha1 md5}"
_TTY="/dev/tty8"
log_begin_msg "Verifying checksums"
cd "${_MOUNTPOINT}"
for _DIGEST in $(echo ${LIVE_VERIFY_CHECKSUMS_DIGESTS} | sed -e 's|,| |g')
do
_CHECKSUMS="$(echo ${_DIGEST} | tr [a-z] [A-Z])SUMS ${_DIGEST}sum.txt"
for _CHECKSUM in ${_CHECKSUMS}
do
if [ -e "${_CHECKSUM}" ]
then
echo "Found ${_CHECKSUM}..." > "${_TTY}"
if [ -e "/bin/${_DIGEST}sum" ]
then
echo "Checking ${_CHECKSUM}..." > "${_TTY}"
# Verify checksums
grep -v '^#' "${_CHECKSUM}" | /bin/${_DIGEST}sum -c > "${_TTY}"
_RETURN="${?}"
# Stop after first verification
break
else
echo "Not found /bin/${_DIGEST}sum..." > "${_TTY}"
fi
fi
done
done
log_end_msg
case "${_RETURN}" in
0)
log_success_msg "Verification successfull, rebooting in 10 seconds."
sleep 10
# Unmount live-media
cd /
umount -f "${_MOUNTPOINT}" > /dev/null 2>&1
sync
# Attempt to remount all mounted filesystems read-only
echo u > /proc/sysrq-trigger
# Immediately reboot the system without syncing or unmounting filesystems
echo b > /proc/sysrq-trigger
;;
*)
panic "Verification failed, $(basename ${_TTY}) for more information."
;;
esac
}
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