mirror of https://github.com/CISOfy/lynis.git
193 lines
7.4 KiB
Bash
193 lines
7.4 KiB
Bash
#!/bin/sh
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#################################################################################
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#
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# Lynis
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# ------------------
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#
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# Copyright 2007-2013, Michael Boelen
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# Copyright 2007-2021, CISOfy
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#
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# Website : https://cisofy.com
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# Blog : http://linux-audit.com
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# GitHub : https://github.com/CISOfy/lynis
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#
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# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
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# welcome to redistribute it under the terms of the GNU General Public License.
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# See LICENSE file for usage of this software.
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#
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######################################################################
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#
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# Helper program to generate specific details such as host IDs
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#
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######################################################################
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#
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# How to use:
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# ------------
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# Run: lynis generate <option>
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#
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######################################################################
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SAVEFILE=0
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GENERATE_ARGS="hostids systemd-units"
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if [ $# -gt 0 ]; then
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case $1 in
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"hostids")
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if [ $# -gt 1 ]; then
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shift
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if [ $1 = "--save" ]; then
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SAVEFILE=1
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fi
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fi
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# Generate random host IDs
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case "${OS}" in
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"AIX")
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# hexdump does not exist on AIX
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HOSTID=$(head -c20 < /dev/urandom | xxd -c 20 -p)
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HOSTID2=$(head -c32 < /dev/urandom | xxd -c 32 -p)
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;;
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*)
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# xxd does not exist on FreeBSD
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# Note: hexdump may omit leading or trailing zeroes.
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# Take 100 characters as input, turn to hex, then take first 40/64.
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HOSTID=$(head -c100 < /dev/urandom | hexdump -ve '"%.2x"' | head -c40)
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HOSTID2=$(head -c100 < /dev/urandom | hexdump -ve '"%.2x"' | head -c64)
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;;
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esac
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${ECHOCMD} "Generated host identifiers"
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${ECHOCMD} "- hostid: ${HOSTID}"
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${ECHOCMD} "- hostid2: ${HOSTID2}"
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if [ ${SAVEFILE} -eq 1 ]; then
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FILE="${ROOTDIR}etc/lynis/hostids"
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if [ -f ${FILE} ]; then
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${ECHOCMD} "Error: hostids file already exists (${FILE})"
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${ECHOCMD} "Remove the file first and rerun command"
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ExitFatal
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else
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OUTPUT=$(touch ${FILE} 2> /dev/null)
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if [ $? -eq 0 ]; then
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${ECHOCMD} "Created hostids file (${FILE})"
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echo "# generated using 'lynis generate hostids --save'" > ${FILE}
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echo "hostid=${HOSTID}" >> ${FILE}
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echo "hostid2=${HOSTID2}" >> ${FILE}
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else
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ExitFatal "Error: could not created hostids file (${FILE}). Issue with permissions?"
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fi
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fi
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fi
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ExitClean
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;;
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"cronjob")
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${ECHOCMD} "Not implemented yet"
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;;
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"systemd-units")
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${ECHOCMD} ""
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${ECHOCMD} "${BG_BLUE}Step 1: create service unit (/etc/systemd/system/lynis.service)${NORMAL}"
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${ECHOCMD} ""
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${ECHOCMD} "#################################################################################"
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${ECHOCMD} "#"
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${ECHOCMD} "# Lynis service file for systemd"
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${ECHOCMD} "#"
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${ECHOCMD} "#################################################################################"
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${ECHOCMD} "# Do not remove, so Lynis can provide a hint when a newer unit is available"
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${ECHOCMD} "# Generator=lynis"
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${ECHOCMD} "# Version=1"
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${ECHOCMD} "#################################################################################"
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${ECHOCMD} ""
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${ECHOCMD} "[Unit]"
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${ECHOCMD} "Description=Security audit and vulnerability scanner"
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${ECHOCMD} "Documentation=https://cisofy.com/docs/"
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${ECHOCMD} ""
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${ECHOCMD} "[Service]"
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${ECHOCMD} "Nice=19"
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${ECHOCMD} "IOSchedulingClass=best-effort"
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${ECHOCMD} "IOSchedulingPriority=7"
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${ECHOCMD} "Type=simple"
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MYBINARY=$(which lynis 2>/dev/null)
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MOREOPTIONS=""
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if [ -n "${LICENSE_KEY}" ]; then
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MOREOPTIONS=" --upload"
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fi
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${ECHOCMD} "ExecStart=${MYBINARY:-/path/to/lynis} audit system --cronjob${MOREOPTIONS}"
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${ECHOCMD} ""
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${ECHOCMD} "[Install]"
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${ECHOCMD} "WantedBy=multi-user.target"
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${ECHOCMD} ""
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${ECHOCMD} "#################################################################################"
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${ECHOCMD} ""
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${ECHOCMD} ""
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${ECHOCMD} "${BG_BLUE}Step 2: create timer unit (/etc/systemd/system/lynis.timer)${NORMAL}"
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${ECHOCMD} ""
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${ECHOCMD} "#################################################################################"
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${ECHOCMD} "#"
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${ECHOCMD} "# Lynis timer file for systemd"
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${ECHOCMD} "#"
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${ECHOCMD} "#################################################################################"
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${ECHOCMD} "# Do not remove, so Lynis can provide a hint when a newer unit is available"
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${ECHOCMD} "# Generator=lynis"
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${ECHOCMD} "# Version=1"
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${ECHOCMD} "#################################################################################"
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${ECHOCMD} ""
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${ECHOCMD} "[Unit]"
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${ECHOCMD} "Description=Daily timer for the Lynis security audit and vulnerability scanner"
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${ECHOCMD} ""
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${ECHOCMD} "[Timer]"
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${ECHOCMD} "OnCalendar=daily"
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${ECHOCMD} "RandomizedDelaySec=1800"
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${ECHOCMD} "Persistent=false"
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${ECHOCMD} ""
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${ECHOCMD} "[Install]"
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${ECHOCMD} "WantedBy=timers.target"
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${ECHOCMD} ""
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${ECHOCMD} "#################################################################################"
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${ECHOCMD} ""
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${ECHOCMD} ""
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${ECHOCMD} "${BG_BLUE}Step 3 - Enable the timer${NORMAL}"
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${ECHOCMD} ""
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${ECHOCMD} "Tell systemd you made changes: systemctl daemon-reload"
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${ECHOCMD} ""
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${ECHOCMD} "Enable and start the timer (so no reboot is needed): systemctl enable --now lynis.timer"
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${ECHOCMD} ""
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${ECHOCMD} ""
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${ECHOCMD} "${BG_BLUE}Optional - Customize${NORMAL}"
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${ECHOCMD} ""
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${ECHOCMD} "Want to override the timer? Run: systemctl edit lynis.timer"
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${ECHOCMD} "Note: set the timer by first resetting it, then set the preferred value"
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${ECHOCMD} ""
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${ECHOCMD} "[Timer]"
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${ECHOCMD} "OnCalendar="
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${ECHOCMD} "OnCalendar=*-*-* 03:00:00"
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${ECHOCMD} ""
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;;
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*) ${ECHOCMD} "Unknown argument '${RED}$1${NORMAL}' for lynis generate" ;;
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esac
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else
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${ECHOCMD} "\n ${WHITE}Provide an additional argument${NORMAL}\n\n"
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for ITEM in ${GENERATE_ARGS}; do
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${ECHOCMD} " lynis generate ${BROWN}${ITEM}${NORMAL}"
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done
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${ECHOCMD} "\n"
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${ECHOCMD} ""
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${ECHOCMD} "Extended help about the generate command can be provided with: $0 show commands generate"
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fi
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ExitClean
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# The End
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