pax_global_header00006660000000000000000000000064134554412060014516gustar00rootroot0000000000000052 comment=33ea87521dcb1d72c5e9e6417f7882b3f3227d73 chkboot-1.3/000077500000000000000000000000001345544120600130125ustar00rootroot00000000000000chkboot-1.3/CONTRIBUTORS.md000066400000000000000000000005561345544120600152770ustar00rootroot00000000000000Original author Ju (ju at heisec dot de): A big thank you to the Archlinux wiki for getting me started with this: https://wiki.archlinux.org/index.php/LUKS#Securing_the_unencrypted_boot_partition Additional authors Inhies (https://github.com/inhies/) Prurigro (https://github.com/prurigro/) sercxanto (https://github.com/sercxanto/) chkboot-1.3/GPLv2.md000066400000000000000000000366121345544120600142360ustar00rootroot00000000000000The GNU General Public License, Version 2, June 1991 (GPLv2) ============================================================ > Copyright (C) 1989, 1991 Free Software Foundation, Inc. > 59 Temple Place, Suite 330 > Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 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BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. chkboot-1.3/LICENSE.md000066400000000000000000000011401345544120600144120ustar00rootroot00000000000000This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. 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If not, see http://www.gnu.org/licenses/. chkboot-1.3/Makefile000066400000000000000000000020461345544120600144540ustar00rootroot00000000000000BIN = $(DESTDIR)/usr/bin DEFAULT = $(DESTDIR)/etc/default PROFILED = $(DESTDIR)/etc/profile.d LIB = $(DESTDIR)/usr/lib SHARE = $(DESTDIR)/usr/share all: install: install -D -m644 chkboot.conf $(DEFAULT)/chkboot.conf install -D -m755 chkboot $(BIN)/chkboot install -D -m755 chkboot-check $(BIN)/chkboot-check install -D -m755 notification/chkboot-profilealert.sh $(PROFILED)/chkboot-profilealert.sh install -D -m755 notification/chkboot-desktopalert $(BIN)/chkboot-desktopalert install-initcpio: install install -D -m644 mkinitcpio-hooks/chkboot-initcpio $(LIB)/initcpio/install/chkboot install-pacman: install install -D -m644 pacman-hooks/80-chkboot-check.hook $(SHARE)/libalpm/hooks/80-chkboot-check.hook install -D -m644 pacman-hooks/99-chkboot-update.hook $(SHARE)/libalpm/hooks/99-chkboot-update.hook install-systemd: install install -D -m644 chkboot.service $(LIB)/systemd/system/chkboot.service install -D -m755 chkboot-bootcheck $(LIB)/systemd/scripts/chkboot-bootcheck .PHONY: all install install-initcpio install-pacman install-systemd chkboot-1.3/README.md000066400000000000000000000074571345544120600143060ustar00rootroot00000000000000Introduction: ------------- chkboot is a set of scripts that are meant to be run on a system with an encrypted disk drive. Due to the nature of disk encryption, in order to get the operating system to boot, there needs to be a portion of it which remains un-encrypted. These scripts check that those files have not changed between reboots. Since the scripts and the data they generate are stored on the encrypted part of the disk, any attempts to modify the boot partition between reboots will be detected. Description ------------ `chkboot`: When run as root, this generates sha512sum hashes of each boot file and the MBR of the boot partition if it exists, then compares the values of these hashes against previously generated hashes if they exist, and any files that don't match get added to a list. A timestamped log of all files that have had changes made to them is kept, but the short term list meant to alert the user is erased the next time `chkboot` is run. `chkboot-check`: This file can be run by anyone who can view /var/lib/chkboot, and will display a warning a the list of changed files if any were detected last time chkboot was run. `chkboot.conf`: Contans settings for your configuration, including which alert types will be used. Alert types are currently on shell login via '/etc/profile.d' and in the vterm header by modifying '/etc/issue' `INITCPIO SUPPORT`: If your system uses initcpio, add 'chkboot' to the end of your modules array to have chkboot run automatically when you upgrade linux. `SYSTEMD SUPPORT`: If your system uses systemd, you should enable the chkboot service to have your boot partitioned checked every time your system starts. Installation ------------ ### The basic components can be installed as shown below ``` make install ``` ### To install initcpio components: ``` make install-initcpio ``` ### To install systemd components: ``` make install-systemd ``` Manual Installation ------------------- ### Everything should be installed as shown below ``` install -D -m644 chkboot/chkboot.conf /etc/default/chkboot.conf install -D -m755 chkboot/chkboot /usr/bin/chkboot install -D -m755 chkboot/chkboot-check /usr/bin/chkboot-check install -D -m755 chkboot/chkboot-profilealert.sh /etc/profile.d/chkboot-profilealert.sh install -D -m755 chkboot-desktopalert /usr/bin/chkboot-desktopalert ``` To make `chkboot` run on startup on BSD-style init-based systems (e.g. Debian, Ubuntu), add the following line to `/etc/rc.local`: ``` /usr/bin/chkboot & ``` ### REQUIRES INITCPIO: Add `chkboot` to the end of the 'HOOKS' array in `/etc/mkinitcpio.conf` ``` install -D -m644 chkboot/chkboot-initcpio /usr/lib/initcpio/install/chkboot ``` ### REQUIRES SYSTEMD Run `systemctl --system daemon-reload` and then `systemctl enable chkboot` ### OPTIONAL: `chkboot-bootcheck` can be installed elsewhere and added to the startup sequence with another system: ``` install -D -m644 chkboot/chkboot.service /usr/lib/systemd/system/chkboot.service install -D -m755 chkboot/chkboot-bootcheck /usr/lib/systemd/scripts/chkboot-bootcheck ``` ``chkboot-desktopalert`` notifies the desktop user about the change and can be included as startup script in the desktop environment or window manager. Credits ------- Maintainer: Grazzolini (https://github.com/grazzolini) Author: Ju (ju at heisec dot de) chkboot originally appeared in an article titled "Boot-Sicherung" in [c't magazin's March 2012 issue] [1]. The original author is Juergen Schmidt, ju at heisec.de. The original source code can be found either at the first commit of this repository, or at the [original URL] [2]. [1]: http://www.heise.de/ct/inhalt/2012/03/146/ [2]: http://ftp.heise.de/pub/ct/listings/1203-146.zip Additional authors: Inhies (https://github.com/inhies/) Prurigro (https://github.com/prurigro/) Contributors: sercxanto (https://github.com/sercxanto/) chkboot-1.3/chkboot000077500000000000000000000070431345544120600143750ustar00rootroot00000000000000#!/usr/bin/env bash # chkboot: copy to $PATH and change its permissions to executable, then set to run on startup # # author: ju (ju at heisec dot de) # contributors: inhies, prurigro # # license: GPLv2 # # a reminder that this will NOT protect against: # -a trojan hiding in your BIOS # -rootkits that mimmick the old files CHKBOOT_CMD=$(echo "$0" | sed 's/.*\///g') function help { echo "Syntax:" echo -e "\t'${CHKBOOT_CMD}': Update checksums for boot partition files and create/update the alert file with any differences" echo -e "\t'${CHKBOOT_CMD} -u' or '${CHKBOOT_CMD} --update': When making valid changes to boot, update checksums and remove the alert file if it exists" echo -e "\t'${CHKBOOT_CMD} -h' or '${CHKBOOT_CMD} --help': Display this help text" } if [ "$UID" -ne 0 ]; then echo "${CHKBOOT_CMD} must be run as root" exit 1 fi source /etc/default/chkboot.conf CURRTIME=`date +"%Y%m%d-%H%M%S"` BOOTFILES="${CHKBOOT_DATA}/BOOTFILES-$CURRTIME" BOOTFILES_LAST="${CHKBOOT_DATA}/BOOTFILES-last" DISKHEAD="${CHKBOOT_DATA}/DISKHEAD-$CURRTIME" DISKHEAD_LAST="${CHKBOOT_DATA}/DISKHEAD-last" CHANGES_ALERT="${CHKBOOT_DATA}/${CHANGES_ALERT}" CHANGES_LOG="${CHKBOOT_DATA}/${CHANGES_LOG}" UPDATE="0" CHANGED="0" if [ ! -z "$1" ]; then if [ "$1" = "-u" -o "$1" = "--update" ]; then UPDATE="1" elif [ "$1" = "-h" -o "$1" = "--help" ]; then help exit 0 else echo -e "Invalid argument: ${1}" help exit 1 fi fi install -d "$CHKBOOT_DATA" # delete the previous if [[ -s "${CHANGES_ALERT}" ]]; then # restore /etc/issue if it's been modified if [ ! $(grep -c "CHKBOOT ALERT" /etc/issue) = 0 ]; then sed -i ':a;N;$!ba;s/\n/CHKBOOT_TEMPNEWLINE/g;s:CHKBOOT_TEMPNEWLINE\x1B\[[0-9;]*[mK].*::g;s/CHKBOOT_TEMPNEWLINE/\n/g' /etc/issue fi # reset the changes being tracked by removing the file containing them (the log still exists) rm "${CHANGES_ALERT}" fi # making a copy of the head of the disk dd if="$BOOTDISK" of="$DISKHEAD" bs=512 count=1 > /dev/null 2>&1 pushd "$BOOTDIR" > /dev/null 2>&1 files=`find . -type f` # get file infos files=`echo $files | sed "s/.\/grub\/grubenv//"` # remove files that should be skipped # generate hashes of each file for fname in $files; do hash=`sha512sum -b $fname | awk '{print $1}'` echo "$fname $hash" done > $BOOTFILES [ -s "$BOOTFILES" ] || ( exit 0 ) if [ ! -s "$DISKHEAD_LAST" ]; then ln -s -f $DISKHEAD $DISKHEAD_LAST; fi if [ ! -s "$BOOTFILES_LAST" ]; then ln -s -f $BOOTFILES $BOOTFILES_LAST; exit 0; fi ( diff $BOOTFILES_LAST $BOOTFILES >> "${CHANGES_ALERT}-now" ) || CHANGED="1" ( diff $DISKHEAD_LAST $DISKHEAD >> "${CHANGES_ALERT}-now" ) || CHANGED="1" # changes detected, create the changes alert file if [ $CHANGED = "0" ] ; then rm -f $DISKHEAD "${CHANGES_ALERT}-now" $BOOTFILES else # create the changes alert file with a heading and the date and the list of changed files echo -e "List of changed files on `date`:\n" > "${CHANGES_ALERT}" cat "${CHANGES_ALERT}-now" >> "$CHANGES_ALERT" # copy the latest changes file to the end of the log cat "$CHANGES_ALERT" >> "$CHANGES_LOG" echo >> "$CHANGES_LOG" # set the latest hashes to the old ones for next time then exit ln -s -f $BOOTFILES $BOOTFILES_LAST ln -s -f $DISKHEAD $DISKHEAD_LAST fi if [ $UPDATE = "1" ]; then rm -f "$CHANGES_ALERT" "${CHANGES_ALERT}-now" exit 0 fi exit $CHANGED popd > /dev/null 2>&1 chkboot-1.3/chkboot-bootcheck000077500000000000000000000013011345544120600163230ustar00rootroot00000000000000#!/usr/bin/env bash # chkboot-bootcheck: on systemd systems, copy this to /usr/lib/systemd/scripts/ and start the chkboot-boot.service # on other systems, copy this somewhere it can be acceed during boot and add it to the end of the boot process # # author: ju (ju at heisec dot de) # contributors: inhies, prurigro # # license: GPLv2 source /etc/default/chkboot.conf chkboot # only modify /etc/issue if that style of alert has been selected if [ ! $(echo "${CHKBOOT_STYLES}" | grep -c "issue") = 0 ]; then # modify /etc/issue if any changes to boot files have been found CHKBOOT_CHECK=$(chkboot-check) if [ "$?" = 1 ]; then echo "${CHKBOOT_CHECK}" >> /etc/issue; fi fi chkboot-1.3/chkboot-check000077500000000000000000000014231345544120600154440ustar00rootroot00000000000000#!/usr/bin/env bash # chkboot-check: copy to /usr/bin/chkboot-check and change its permissions to executable and run to test for changes # # author: ju (ju at heisec dot de) # contributors: inhies, prurigro # # license: GPLv2 source /etc/default/chkboot.conf if [[ -s "${CHKBOOT_DATA}/${CHANGES_ALERT}" ]]; then echo -e -n "\e[0;${HIGHLIGHT_COLOUR};47m" echo -e "CHKBOOT ALERT!\n" echo "Changes have been detected in your boot files!" echo "The following list of files contained in have changed since the last time this script was run (filename sha512):" cat "${CHKBOOT_DATA}/${CHANGES_ALERT}" echo -e -n "\nThis notification will continue to appear until you either run \"chkboot\" again as root or restart your computer" echo -e "\e[0m\n" exit 1 fi chkboot-1.3/chkboot.conf000066400000000000000000000011211345544120600153050ustar00rootroot00000000000000######################### ##CHKBOOT Configuration## ######################### #Boot disk BOOTDISK=/dev/sda #Boot partition BOOTPART=/dev/sda1 #Boot partition mount point BOOTDIR=/boot #CHKBOOT data directory CHKBOOT_DATA=/var/lib/chkboot #Name of changes alert file CHANGES_ALERT="boot-differences" #Name of changes log file CHANGES_LOG="boot-differences-log" #Alert styles to use, separated by comma # issue: appears at the top of vterms prior to loggin in # profile: executes as a user's terminal session begins CHKBOOT_STYLES="issue,profile" #Highlight colour HIGHLIGHT_COLOUR="31" chkboot-1.3/chkboot.service000066400000000000000000000003601345544120600160240ustar00rootroot00000000000000[Unit] Description=Check for changes made to the boot partition since shutting down Requires=basic.target After=basic.target [Service] Type=oneshot ExecStart=/usr/lib/systemd/scripts/chkboot-bootcheck [Install] WantedBy=multi-user.target chkboot-1.3/mkinitcpio-hooks/000077500000000000000000000000001345544120600163015ustar00rootroot00000000000000chkboot-1.3/mkinitcpio-hooks/chkboot-initcpio000077500000000000000000000017321345544120600214770ustar00rootroot00000000000000#!/usr/bin/env bash # chkboot-initcpio: on Arch Linux (and possibly other systems with mkinitcpio), copy this # to '/usr/lib/initcpio/install/chkboot', then add 'chkboot' to the end # of the 'HOOKS' array, and rerun mkinitcpio to generate with this included # # author: ju (ju at heisec dot de) # contributors: inhies, prurigro # # license: GPLv2 build() { echo "Updating chkboot hashes of your boot files..." #TEST TO SEE IF BOOT FILES WERE MODIFIED WITHOUT THE USER'S ACKNOWLEDGEMENT (BY RUNNING 'chkboot') AND ALERT THEM IF IT HAS BEEN chkboot-check if [ "$?" = 1 ]; then echo -e "\n### WARNING: Previously modified files were not acknowledged ###"; echo "### Check the issues log at ${CHANGES_LOG} for details ###"; fi #RUN CHKBOOT TO UPDATE THE HASHES WITHOUT CREATING THE ALERT FILE chkboot -u sync } help() { cat <