From 03ce05b2a917320eb4fdfa8b76d28122efe970e7 Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Tue, 18 Jul 2017 16:02:43 +0200 Subject: [PATCH 01/13] Cleaning, thanks to shellcheck --- docs/zzz_evobackup | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/docs/zzz_evobackup b/docs/zzz_evobackup index b502433..ef465ec 100755 --- a/docs/zzz_evobackup +++ b/docs/zzz_evobackup @@ -9,8 +9,8 @@ # ## lang = C for english outputs -LANGUAGE=C -LANG=C +export LANGUAGE=C +export LANG=C ## Force umask umask 077 @@ -18,13 +18,14 @@ umask 077 ## Verify other evobackup process and kill if needed PIDFILE=/var/run/evobackup.pid if [ -e $PIDFILE ]; then + pid=$(cat "$PIDFILE") # Killing the childs of evobackup. - for pid in $(ps h --ppid $(cat $PIDFILE) -o pid | tr -s '\n' ' '); do - kill -9 $pid; + for ppid in $(ps h --ppid "$pid" -o pid | tr -s '\n' ' '); do + kill -9 "$ppid"; done # Then kill the main PID. - kill -9 $(cat $PIDFILE) - echo "$0 tourne encore (PID `cat $PIDFILE`). Processus killé" >&2 + kill -9 "$pid" + echo "$0 tourne encore (PID $pid). Processus killé" >&2 fi echo "$$" > $PIDFILE trap "rm -f $PIDFILE" EXIT @@ -39,7 +40,7 @@ SYSTEM=$(uname | tr '[:upper:]' '[:lower:]') MAIL=jdoe@example.com # Variable to choose different backup server with date -NODE=$(expr `date +%d` % 2) +NODE=$(($(date +%d) % 2)) # serveur address for rsync SRV="node$NODE.backup.example.com" @@ -163,7 +164,7 @@ done ## Dump process with ps ps aux >/home/backup/ps.out -if [ $SYSTEM = "linux" ]; then +if [ "$SYSTEM" = "linux" ]; then ## Dump network connections with netstat netstat -taupen >/home/backup/netstat.out @@ -180,11 +181,9 @@ fi HOSTNAME=$(hostname) -DATE=$(/bin/date +"%d-%m-%Y") - BEGINNING=$(/bin/date +"%d-%m-%Y ; %H:%M") -if [ $SYSTEM = "linux" ]; then +if [ "$SYSTEM" = "linux" ]; then rep="/bin /boot /lib /opt /sbin /usr" else rep="/bsd /bin /boot /sbin /usr" @@ -226,7 +225,7 @@ rsync -avzh --stats --delete --delete-excluded --force --ignore-errors --partial /home \ /srv \ -e "ssh -p $SSH_PORT" \ - root@$SRV:/var/backup/ \ + "root@$SRV:/var/backup/" \ | tail -30 >> /var/log/evobackup.log END=$(/bin/date +"%d-%m-%Y ; %H:%M") From b8e4c3f11bb1059b303ecb9a14d82799acae05d5 Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Wed, 19 Jul 2017 11:36:20 +0200 Subject: [PATCH 02/13] Posix compatibility * Don't use brace expansion * Don't use process substitution * Don't use source keyword * Don't use $RANDOM var --- bkctld | 156 ++++++++++++++++++++++++++------------------------------- 1 file changed, 72 insertions(+), 84 deletions(-) diff --git a/bkctld b/bkctld index e8b56c0..a882180 100755 --- a/bkctld +++ b/bkctld @@ -1,4 +1,4 @@ -#!/bin/bash +#!/bin/sh # # bkctld is a shell script to create and manage a backup server which will # handle the backup of many servers (clients). @@ -44,7 +44,7 @@ check_jail_on() { if [ -f ${JAILDIR}/${jail}/${SSHD_PID} ]; then pid=$(cat ${JAILDIR}/${jail}/${SSHD_PID}) ps -p $pid > /dev/null - if [ $? == 0 ]; then + if [ $? -eq 0 ]; then exit 0 else rm ${JAILDIR}/${jail}/${SSHD_PID} @@ -166,28 +166,27 @@ mk_jail() { [ -f "${LOCALTPLDIR}/group" ] && group="${LOCALTPLDIR}/group" umask 022 - echo -n "1 - Creating the chroot..." - mkdir -p ${JAILDIR}/${jail}/{bin,dev,etc/ssh,lib,lib64,proc} - mkdir -p ${JAILDIR}/${jail}/lib/{x86_64-linux-gnu,tls/i686/cmov,i686/cmov} - mkdir -p ${JAILDIR}/${jail}/usr/{bin,lib,sbin} - mkdir -p ${JAILDIR}/${jail}/usr/lib/{x86_64-linux-gnu,openssh,i686/cmov} - mkdir -p ${JAILDIR}/${jail}/root/.ssh && chmod 700 ${JAILDIR}/${jail}/root/.ssh - mkdir -p ${JAILDIR}/${jail}/var/{log,run/sshd} - touch ${JAILDIR}/${jail}/var/log/{authlog,lastlog,messages,syslog} - touch ${JAILDIR}/${jail}/etc/fstab - echo "...OK" + echo "1 - Creating the chroot" + cd "${JAILDIR}/${jail}" + mkdir -p bin dev etc/ssh lib lib64 proc + mkdir -p lib/x86_64-linux-gnu lib/tls/i686/cmov lib/i686/cmov + mkdir -p usr/bin usr/lib usr/sbin + mkdir -p usr/lib/x86_64-linux-gnu usr/lib/openssh usr/lib/i686/cmov + mkdir -p root/.ssh -m 0700 + mkdir -p var/log var/run/sshd + touch var/log/authlog var/log/lastlog var/log/messages var/log/syslog etc/fstab - echo -n "2 - Copying essential files..." - cp /proc/devices ${JAILDIR}/${jail}/proc - cp /etc/ssh/{ssh_host_rsa_key,ssh_host_dsa_key} ${JAILDIR}/${jail}/etc/ssh/ - cp $passwd ${JAILDIR}/${jail}/etc/ - cp $shadow ${JAILDIR}/${jail}/etc/ - cp $group ${JAILDIR}/${jail}/etc/ - echo "...OK" + echo "2 - Copying essential files" + cp /proc/devices proc + cp /etc/ssh/ssh_host_rsa_key etc/ssh + cp /etc/ssh/ssh_host_dsa_key etc/ssh + cp "$passwd" etc + cp "$shadow" etc + cp "$group" etc - echo -n "3 - Copying binaries..." - cp -f /lib/ld-linux.so.2 ${JAILDIR}/${jail}/lib/ 2>/dev/null || cp -f /lib64/ld-linux-x86-64.so.2 ${JAILDIR}/${jail}/lib64/ - cp /lib/x86_64-linux-gnu/libnss* ${JAILDIR}/${jail}/lib/x86_64-linux-gnu/ + echo "3 - Copying binaries" + cp -f /lib/ld-linux.so.2 lib 2>/dev/null || cp -f /lib64/ld-linux-x86-64.so.2 lib64 + cp /lib/x86_64-linux-gnu/libnss* lib/x86_64-linux-gnu for dbin in /bin/bash /bin/cat /bin/chown /bin/mknod /bin/rm /bin/ls /bin/sed /bin/sh /bin/uname /bin/mount /usr/bin/rsync /usr/sbin/sshd /usr/lib/openssh/sftp-server; do cp -f $dbin ${JAILDIR}/${jail}/$dbin; @@ -195,7 +194,6 @@ mk_jail() { cp -p $lib ${JAILDIR}/${jail}/$lib done done - echo "...OK" } ## sub functions : functions call by subcommand @@ -220,15 +218,12 @@ sub_init() { mkdir -p ${JAILDIR}/${jail} fi mk_jail $jail - echo -n "4 - Copie default sshd_config..." + echo "4 - Copie default sshd_config" install -m 0640 $sshd_config ${JAILDIR}/$jail/${SSHD_CONFIG} - echo "...OK" - echo -n "5 - Set usable sshd port..." + echo "5 - Set usable sshd port" set_port $jail auto - echo "...OK" - echo -n "6 - Copie default inc configuration..." + echo "6 - Copie default inc configuration" install -m 0640 $inctpl ${CONFDIR}/$jail - echo "...OK" } sub_update() { @@ -259,7 +254,7 @@ sub_remove() { if ( check_jail_on $jail ); then log stop $jail fi - echo "Delete jail $jail ..." + echo "Delete jail $jail" rm -f ${CONFDIR}/${jail} jail_inode=$(stat --format=%i ${JAILDIR}/${jail}) if [ "$jail_inode" -eq 256 ]; then @@ -279,7 +274,6 @@ sub_remove() { rmdir --ignore-fail-on-non-empty ${INCDIR}/${jail} fi set_firewall $jail - echo "...OK" } sub_start() { @@ -293,28 +287,28 @@ sub_start() { exit 1 fi - echo -n "Start jail $jail ..." - mount -t proc proc-${jail} ${JAILDIR}/${jail}/proc/ - mount -nt tmpfs dev-${jail} ${JAILDIR}/${jail}/dev - mknod -m 622 ${JAILDIR}/${jail}/dev/console c 5 1 - mknod -m 666 ${JAILDIR}/${jail}/dev/null c 1 3 - mknod -m 666 ${JAILDIR}/${jail}/dev/zero c 1 5 - mknod -m 666 ${JAILDIR}/${jail}/dev/ptmx c 5 2 - mknod -m 666 ${JAILDIR}/${jail}/dev/tty c 5 0 - mknod -m 444 ${JAILDIR}/${jail}/dev/random c 1 8 - mknod -m 444 ${JAILDIR}/${jail}/dev/urandom c 1 9 - chown root:tty ${JAILDIR}/${jail}/dev/{console,ptmx,tty} - ln -s ${JAILDIR}/${jail}/proc/self/fd ${JAILDIR}/${jail}/dev/fd - ln -s ${JAILDIR}/${jail}/proc/self/fd/0 ${JAILDIR}/${jail}/dev/stdin - ln -s ${JAILDIR}/${jail}/proc/self/fd/1 ${JAILDIR}/${jail}/dev/stdout - ln -s ${JAILDIR}/${jail}/proc/self/fd/2 ${JAILDIR}/${jail}/dev/stderr - ln -s ${JAILDIR}/${jail}/proc/kcore ${JAILDIR}/${jail}/dev/core - mkdir ${JAILDIR}/${jail}/dev/pts - mkdir ${JAILDIR}/${jail}/dev/shm - mount -t devpts -o gid=4,mode=620 none ${JAILDIR}/${jail}/dev/pts - mount -t tmpfs none ${JAILDIR}/${jail}/dev/shm - chroot ${JAILDIR}/${jail} /usr/sbin/sshd - echo "...OK" + echo "Start jail $jail" + cd "${JAILDIR}/${jail}" + mount -t proc "proc-${jail}" proc + mount -nt tmpfs "dev-${jail}" dev + mknod -m 622 dev/console c 5 1 + mknod -m 666 dev/null c 1 3 + mknod -m 666 dev/zero c 1 5 + mknod -m 666 dev/ptmx c 5 2 + mknod -m 666 dev/tty c 5 0 + mknod -m 444 dev/random c 1 8 + mknod -m 444 dev/urandom c 1 9 + chown root:tty dev/console dev/ptmx dev/tty + ln -s proc/self/fd dev/fd + ln -s proc/self/fd/0 dev/stdin + ln -s proc/self/fd/1 dev/stdout + ln -s proc/self/fd/2 dev/stderr + ln -s proc/kcore dev/core + mkdir dev/pts + mkdir dev/shm + mount -t devpts -o gid=4,mode=620 none dev/pts + mount -t tmpfs none dev/shm + chroot "${JAILDIR}/${jail}" /usr/sbin/sshd } sub_stop() { @@ -328,7 +322,7 @@ sub_stop() { exit 1 fi - echo -n "Stop jail $jail ..." + echo "Stop jail $jail" pid=$(cat ${JAILDIR}/${jail}/${SSHD_PID}) for conn in $(ps --ppid $pid -o pid=); do kill $conn @@ -336,7 +330,6 @@ sub_stop() { kill $pid umount --lazy --recursive ${JAILDIR}/${jail}/dev umount --lazy ${JAILDIR}/${jail}/proc/ - echo "...OK" } sub_reload() { @@ -350,9 +343,8 @@ sub_reload() { exit 1 fi - echo -n "Reload jail $jail ..." + echo "Reload jail $jail" pkill -HUP -F ${JAILDIR}/${jail}/${SSHD_PID} - echo "...OK" } sub_status() { @@ -444,7 +436,7 @@ sub_inc() { } sub_rm() { - empty="/tmp/bkctld-$$-$RANDOM/" + empty="/tmp/bkctld-${$}-$(date +%N))" mkdir $empty pidfile="/var/run/bkctld-rm.pid" if [ -f "${pidfile}" ]; then @@ -466,30 +458,28 @@ sub_rm() { for jail in $( ls -1 $JAILDIR ); do incs=$(ls -1 ${INCDIR}/$jail) if [ -f ${CONFDIR}/$jail ]; then - keep=$( - while read j; do - date=$( echo $j | cut -d. -f1 ) - before=$( echo $j | cut -d. -f2 ) - date -d "$(date $date) $before" "+%Y-%m-%d" - done < ${CONFDIR}/$jail - ) + keepfile="${CONFDIR}/.keep-${jail}" + while read j; do + date=$( echo "$j" | cut -d. -f1 ) + before=$( echo "$j" | cut -d. -f2 ) + date -d "$(date "$date") $before" "+%Y-%m-%d" + done < "${CONFDIR}/$jail" > "$keepfile" + for j in $(echo "${incs}" | grep -v -f "$keepfile"); do + start=$(date +"%H:%M:%S") + inc_inode=$(stat --format=%i "${INCDIR}/${jail}/${j}") + if [ "$inc_inode" -eq 256 ]; then + /sbin/btrfs subvolume delete "${INCDIR}/${jail}/${j}" >/dev/null + else + cd "${INCDIR}/$jail" + rsync -a --delete "$empty/" "$j/" + rmdir "$j" + fi + end=$(date +"%H:%M:%S") + rm_log="Delete $j inc of $jail (Start at $start / End at $end)" + echo "${rm_log}" + rms_logs="${rms_logs} ${rm_log}" + done fi - #for j in $( ls ${INCDIR}/$jail ); do - for j in $( grep -v -f <(echo "${keep}") <(echo "${incs}") ); do - start=$(date +"%H:%M:%S") - inc_inode=$(stat --format=%i ${INCDIR}/${jail}/${j}) - if [ "$inc_inode" -eq 256 ]; then - /sbin/btrfs subvolume delete ${INCDIR}/${jail}/${j} >/dev/null - else - cd ${INCDIR}/$jail - rsync -a --delete $empty $j* - rmdir $j* - fi - end=$(date +"%H:%M:%S") - rm_log=$(echo "Delete $j inc of $jail (Start at $start / End at $end)") - echo "${rm_log}" - rms_logs=$(echo "${rms_logs}"; echo "${rm_log}") - done done rmdir $empty rm $pidfile @@ -521,9 +511,7 @@ main() { echo "Error, you need to be root to run $0 !" >&2 exit 1 fi - if [ -f /etc/default/bkctld ]; then - source /etc/default/bkctld - fi + [ -f /etc/default/bkctld ] && . /etc/default/bkctld [ -z "${CONFDIR}" ] && CONFDIR='/etc/evobackup' [ -z "${JAILDIR}" ] && JAILDIR='/backup/jails' [ -z "${INCDIR}" ] && INCDIR='/backup/incs' From 8ac454dae0d45782e46eb456b312f00ab2575ffa Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Wed, 19 Jul 2017 14:02:49 +0200 Subject: [PATCH 03/13] Fix shellcheck warnings --- bkctld | 38 ++++++++++++++++++++++---------------- 1 file changed, 22 insertions(+), 16 deletions(-) diff --git a/bkctld b/bkctld index a882180..82441f5 100755 --- a/bkctld +++ b/bkctld @@ -75,8 +75,8 @@ get_key() { get_ip() { jail=$1 - for allow in $(grep -E "^AllowUsers" ${JAILDIR}/$jail/${SSHD_CONFIG}|grep -Eo "root@[^ ]+"); do - echo $allow|cut -d'@' -f2 + grep -E "^AllowUsers" "${JAILDIR}/$jail/${SSHD_CONFIG}"|grep -Eo "root@[^ ]+"| while read allow; do + echo "$allow"|cut -d'@' -f2 done } @@ -97,7 +97,7 @@ set_port() { jail=$1 port=$2 if [ "$port" = "auto" ]; then - port=$(grep -h Port ${JAILDIR}/*/${SSHD_CONFIG} 2>/dev/null | grep -Eo [0-9]+ | sort -n | tail -1) + port=$(grep -h Port ${JAILDIR}/*/${SSHD_CONFIG} 2>/dev/null | grep -Eo "[0-9]+" | sort -n | tail -1) port=$((port+1)) if [ ! $port -gt 1 ]; then port=2222 @@ -210,7 +210,8 @@ sub_init() { fi echo "Create jail $jail :" - rootdir_inode=$(stat --format=%i $(dirname $JAILDIR)) + rootdir=$(dirname "$JAILDIR") + rootdir_inode=$(stat --format=%i "$rootdir") jaildir_inode=$(stat --format=%i $JAILDIR) if [ "$rootdir_inode" -eq 256 ] || [ "$jaildir_inode" -eq 256 ]; then /sbin/btrfs subvolume create ${JAILDIR}/${jail} @@ -263,7 +264,8 @@ sub_remove() { rm -rf ${JAILDIR}/${jail} fi if [ -d ${INCDIR}/${jail} ]; then - for inc in $(ls ${INCDIR}/${jail}); do + incs=$(ls ${INCDIR}/${jail}) + for inc in $incs; do inc_inode=$(stat --format=%i ${INCDIR}/${jail}/$inc) if [ "$inc_inode" -eq 256 ]; then /sbin/btrfs subvolume delete ${INCDIR}/${jail}/${inc} @@ -409,7 +411,8 @@ sub_sync() { sub_inc() { date=$(date +"%Y-%m-%d-%H") incs_logs="" - for jail in $(ls -1 $JAILDIR); do + jails=$(ls $JAILDIR) + for jail in $jails; do inc="${INCDIR}/${jail}/${date}" mkdir -p ${INCDIR}/${jail} if [ ! -d "${inc}" ]; then @@ -421,9 +424,9 @@ sub_inc() { cp -alx ${JAILDIR}/${jail}/ $inc fi end=$(date +"%H:%M:%S") - inc_log=$(echo "Create $date inc of $jail (Start at $start / End at $end)") + inc_log="Create $date inc of $jail (Start at $start / End at $end)" echo "${inc_log}" - incs_logs=$(echo "${incs_logs}"; echo "${inc_log}") + incs_logs="${incs_logs} ${inc_log}" else echo "Inc $date of $jail already exist !" >&2 fi @@ -455,8 +458,9 @@ sub_rm() { fi echo $$ > $pidfile rms_logs="" - for jail in $( ls -1 $JAILDIR ); do - incs=$(ls -1 ${INCDIR}/$jail) + jails=$(ls $JAILDIR) + for jail in $jails; do + incs=$(ls ${INCDIR}/$jail) if [ -f ${CONFDIR}/$jail ]; then keepfile="${CONFDIR}/.keep-${jail}" while read j; do @@ -498,16 +502,16 @@ log() { shift tty -s if [ $? -eq 0 ]; then - sub_${subcommand} $@ 2>&1 | tee -a $logfile + sub_${subcommand} "$@" 2>&1 | tee -a $logfile else - sub_${subcommand} $@ 2>&1 >> $logfile + sub_${subcommand} "$@" > $logfile 2>&1 fi } ## main function : check usage and valid params main() { - if [ $(id -u) != 0 ]; then + if [ "$(id -u)" -ne 0 ]; then echo "Error, you need to be root to run $0 !" >&2 exit 1 fi @@ -549,7 +553,8 @@ main() { "start" | "stop" | "reload" | "restart" | "sync" | "update" | "remove") if [ -n "${jail}" ]; then if [ "${jail}" = "all" ]; then - for jail in $(ls $JAILDIR); do + jails=$(ls $JAILDIR) + for jail in $jails; do case $subcommand in "start") if ! ( check_jail_on $jail ); then @@ -588,11 +593,12 @@ main() { ;; "status") if [ -z "${jail}" ]; then - for jail in $(ls $JAILDIR); do + jails=$(ls $JAILDIR) + for jail in $jails; do sub_$subcommand $jail done else - sub_$subcommand $jail + sub_$subcommand $jail fi ;; *) From 431a245d658a314bb6a32ea00a80798486102e5b Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Fri, 21 Jul 2017 16:46:05 +0200 Subject: [PATCH 04/13] Bump version to 1.4 --- docs/bkctld.8 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/bkctld.8 b/docs/bkctld.8 index be26cf4..d5c6506 100644 --- a/docs/bkctld.8 +++ b/docs/bkctld.8 @@ -1,6 +1,6 @@ .\" Manpage for bkctld. .\" Contact vlaborie@evolix.fr to correct errors or typos. -.TH man 8 "24 Mars 2017" "1.3" "bkctld man page" +.TH man 8 "24 Mars 2017" "1.4" "bkctld man page" .SH NAME bkctld - tool to manage evobackup jail .SH SYNOPSIS From 8f2c869dfa0cbf986846501a0a8a238612b143d1 Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Fri, 21 Jul 2017 15:53:32 +0200 Subject: [PATCH 05/13] Fix sshd logging --- bkctld | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/bkctld b/bkctld index 82441f5..14be62e 100755 --- a/bkctld +++ b/bkctld @@ -310,7 +310,7 @@ sub_start() { mkdir dev/shm mount -t devpts -o gid=4,mode=620 none dev/pts mount -t tmpfs none dev/shm - chroot "${JAILDIR}/${jail}" /usr/sbin/sshd + chroot "${JAILDIR}/${jail}" /usr/sbin/sshd -E /var/log/authlog } sub_stop() { From f8b5269ca3d75b1036c3b581dfc9e27d09cc5702 Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Fri, 21 Jul 2017 15:54:38 +0200 Subject: [PATCH 06/13] Allow only SSH key in default sshd_config --- tpl/sshd_config | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tpl/sshd_config b/tpl/sshd_config index 500b784..6efe0c7 100644 --- a/tpl/sshd_config +++ b/tpl/sshd_config @@ -10,7 +10,7 @@ ServerKeyBits 768 SyslogFacility AUTH LogLevel INFO LoginGraceTime 120 -PermitRootLogin yes +PermitRootLogin without-password StrictModes yes RSAAuthentication yes PubkeyAuthentication yes From 4cbe721eb6b6ad2a69091dfa24071c71940c6eec Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Fri, 21 Jul 2017 15:56:19 +0200 Subject: [PATCH 07/13] Use sh instead of bash for root in jail --- tpl/passwd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tpl/passwd b/tpl/passwd index 85f95e2..69a9f77 100644 --- a/tpl/passwd +++ b/tpl/passwd @@ -1,4 +1,4 @@ -root:x:0:0:root:/root:/bin/bash +root:x:0:0:root:/root:/bin/sh daemon:x:1:1:daemon:/usr/sbin:/bin/sh nobody:x:65534:65534:nobody:/nonexistent:/bin/sh sshd:x:100:65534::/var/run/sshd:/usr/sbin/nologin From 4b86284ca0381724eef2b6b964c60dbea27d13d9 Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Fri, 21 Jul 2017 16:00:37 +0200 Subject: [PATCH 08/13] Don't copy dsa host key but copy ecdsa and ed25519 if present --- bkctld | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/bkctld b/bkctld index 14be62e..f91613f 100755 --- a/bkctld +++ b/bkctld @@ -178,8 +178,9 @@ mk_jail() { echo "2 - Copying essential files" cp /proc/devices proc - cp /etc/ssh/ssh_host_rsa_key etc/ssh - cp /etc/ssh/ssh_host_dsa_key etc/ssh + [ -f /etc/ssh/ssh_host_rsa_key ] && cp /etc/ssh/ssh_host_rsa_key etc/ssh + [ -f /etc/ssh/ssh_host_ecdsa_key ] && cp /etc/ssh/ssh_host_ecdsa_key etc/ssh + [ -f /etc/ssh/ssh_host_ed25519_key ] && cp /etc/ssh/ssh_host_ed25519_key etc/ssh cp "$passwd" etc cp "$shadow" etc cp "$group" etc From f2146a56e5f7d154b406f6cfb6c780eeeba85fc7 Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Fri, 21 Jul 2017 16:15:31 +0200 Subject: [PATCH 09/13] Simplier, lighter and more secure jail --- bkctld | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/bkctld b/bkctld index f91613f..b0b2003 100755 --- a/bkctld +++ b/bkctld @@ -164,20 +164,20 @@ mk_jail() { [ -f "${LOCALTPLDIR}/passwd" ] && passwd="${LOCALTPLDIR}/passwd" [ -f "${LOCALTPLDIR}/shadow" ] && shadow="${LOCALTPLDIR}/shadow" [ -f "${LOCALTPLDIR}/group" ] && group="${LOCALTPLDIR}/group" - umask 022 + umask 077 echo "1 - Creating the chroot" cd "${JAILDIR}/${jail}" - mkdir -p bin dev etc/ssh lib lib64 proc - mkdir -p lib/x86_64-linux-gnu lib/tls/i686/cmov lib/i686/cmov - mkdir -p usr/bin usr/lib usr/sbin - mkdir -p usr/lib/x86_64-linux-gnu usr/lib/openssh usr/lib/i686/cmov - mkdir -p root/.ssh -m 0700 - mkdir -p var/log var/run/sshd - touch var/log/authlog var/log/lastlog var/log/messages var/log/syslog etc/fstab + mkdir -p dev proc + mkdir -p usr/bin usr/sbin usr/lib usr/lib/x86_64-linux-gnu usr/lib/openssh usr/lib64 + mkdir -p etc/ssh var/log var/run/sshd + mkdir -p root/.ssh var/backup -m 0700 + ln -s usr/bin bin + ln -s usr/lib lib + ln -s usr/lib64 lib64 + touch var/log/lastlog var/log/wtmp var/run/utmp echo "2 - Copying essential files" - cp /proc/devices proc [ -f /etc/ssh/ssh_host_rsa_key ] && cp /etc/ssh/ssh_host_rsa_key etc/ssh [ -f /etc/ssh/ssh_host_ecdsa_key ] && cp /etc/ssh/ssh_host_ecdsa_key etc/ssh [ -f /etc/ssh/ssh_host_ed25519_key ] && cp /etc/ssh/ssh_host_ed25519_key etc/ssh @@ -189,7 +189,7 @@ mk_jail() { cp -f /lib/ld-linux.so.2 lib 2>/dev/null || cp -f /lib64/ld-linux-x86-64.so.2 lib64 cp /lib/x86_64-linux-gnu/libnss* lib/x86_64-linux-gnu - for dbin in /bin/bash /bin/cat /bin/chown /bin/mknod /bin/rm /bin/ls /bin/sed /bin/sh /bin/uname /bin/mount /usr/bin/rsync /usr/sbin/sshd /usr/lib/openssh/sftp-server; do + for dbin in /bin/sh /bin/ls /bin/mkdir /bin/cat /bin/rm /bin/sed /usr/bin/rsync /usr/sbin/sshd /usr/lib/openssh/sftp-server; do cp -f $dbin ${JAILDIR}/${jail}/$dbin; for lib in $(ldd $dbin | grep -Eo "/.*so.[0-9\.]+"); do cp -p $lib ${JAILDIR}/${jail}/$lib From 2688ac99bc0f618845785847f553267689f9b26e Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Tue, 1 Aug 2017 16:38:38 +0200 Subject: [PATCH 10/13] Set UseDNS to no in default jail's sshd_config --- tpl/sshd_config | 1 + 1 file changed, 1 insertion(+) diff --git a/tpl/sshd_config b/tpl/sshd_config index 6efe0c7..61e7211 100644 --- a/tpl/sshd_config +++ b/tpl/sshd_config @@ -29,6 +29,7 @@ PrintMotd no PrintLastLog yes TCPKeepAlive yes UseLogin no +UseDNS no Subsystem sftp /usr/lib/openssh/sftp-server From 2ec3f27938aecee7f9f182eba2a257c70c845afd Mon Sep 17 00:00:00 2001 From: Victor LABORIE Date: Tue, 1 Aug 2017 20:59:43 +0200 Subject: [PATCH 11/13] Add nrpe check --- check_nrpe | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 check_nrpe diff --git a/check_nrpe b/check_nrpe new file mode 100644 index 0000000..c449b51 --- /dev/null +++ b/check_nrpe @@ -0,0 +1,38 @@ +#!/bin/sh +# +# bkctld(8) - NRPE check +# +# Copyright (c) 2017 Victor Laborie +# + +[ -f /etc/default/bkctld ] && . /etc/default/bkctld + +[ -z "$JAILDIR" ] && JAILDIR="/backup/jails" + +[ -z "$CRITICAL" ] && CRITICAL=48 +[ -z "$WARNING" ] && WARNING=24 + +cur_time=$(date "+%s") +return=0 + +jails=$(ls "$JAILDIR") +for jail in $jails; do + if [ -f "$JAILDIR/$jail/var/log/lastlog" ]; then + last_conn=$(stat --format=%Y "$JAILDIR/$jail/var/log/lastlog") + date_diff=$(( ( $cur_time - $last_conn ) / (60*60) )) + if [ "$date_diff" -gt "$CRITICAL" ]; then + echo "CRITICAL - $jail - $date_diff hours" + return=2 + elif [ "$date_diff" -gt "$WARNING" ]; then + echo "WARNING - $jail - $date_diff hours" + [ "$return" -ne 2 ] && return=1 + fi + else + echo "CRITICAL - $jail doesn't have lastlog !" + return=2 + fi +done + +[ "$return" -eq 0 ] && echo "OK - Nothing to signal" + +exit "$return" From 5d462bf72a692324b638a66ee53b0611fdc38472 Mon Sep 17 00:00:00 2001 From: Victor Laborie Date: Sat, 5 Aug 2017 15:49:27 -0400 Subject: [PATCH 12/13] Add explicit LICENCE file --- LICENCE | 661 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 661 insertions(+) create mode 100644 LICENCE diff --git a/LICENCE b/LICENCE new file mode 100644 index 0000000..dba13ed --- /dev/null +++ b/LICENCE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. From 26098f1020b8c009caa78e063cfc903f87d3a9a1 Mon Sep 17 00:00:00 2001 From: Victor Laborie Date: Sat, 5 Aug 2017 16:05:31 -0400 Subject: [PATCH 13/13] Fix right on check_nrpe --- check_nrpe | 0 1 file changed, 0 insertions(+), 0 deletions(-) mode change 100644 => 100755 check_nrpe diff --git a/check_nrpe b/check_nrpe old mode 100644 new mode 100755