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#!/bin/sh
# Returns the absolute path of a given string
abspath () { case "$1" in /*)printf "%s\n" "$1";; *)printf "%s\n" "$PWD/$1";; esac; }
# Audit rules default path
auditrules="/etc/audit/audit.rules"
# Compares versions of software of the format X.Y.Z
do_version_check() {
[ "$1" = "$2" ] && return 10
ver1front=$(printf "%s" "$1" | cut -d "." -f -1)
ver1back=$(printf "%s" "$1" | cut -d "." -f 2-)
ver2front=$(printf "%s" "$2" | cut -d "." -f -1)
ver2back=$(printf "%s" "$2" | cut -d "." -f 2-)
if [ "$ver1front" != "$1" ] || [ "$ver2front" != "$2" ]; then
[ "$ver1front" -gt "$ver2front" ] && return 11
[ "$ver1front" -lt "$ver2front" ] && return 9
[ "$ver1front" = "$1" ] || [ -z "$ver1back" ] && ver1back=0
[ "$ver2front" = "$2" ] || [ -z "$ver2back" ] && ver2back=0
do_version_check "$ver1back" "$ver2back"
return $?
else
[ "$1" -gt "$2" ] && return 11 || return 9
fi
}
# Extracts commandline args from the newest running processes named like the first parameter
get_command_line_args() {
PROC="$1"
for PID in $(pgrep -f -n "$PROC"); do
tr "\0" " " < /proc/"$PID"/cmdline
done
}
# Extract the cumulative command line arguments for the docker daemon
#
# If specified multiple times, all matches are returned.
# Accounts for long and short variants, call with short option.
# Does not account for option defaults or implicit options.
get_docker_cumulative_command_line_args() {
OPTION="$1"
if ! get_command_line_args "docker daemon" >/dev/null 2>&1 ; then
line_arg="docker daemon"
else
line_arg="dockerd"
fi
get_command_line_args "$line_arg" |
# normalize known long options to their short versions
sed \
-e 's/\-\-debug/-D/g' \
-e 's/\-\-host/-H/g' \
-e 's/\-\-log-level/-l/g' \
-e 's/\-\-version/-v/g' \
|
# normalize parameters separated by space(s) to -O=VALUE
sed \
-e 's/\-\([DHlv]\)[= ]\([^- ][^ ]\)/-\1=\2/g' \
|
# get the last interesting option
tr ' ' "\n" |
grep "^${OPTION}" |
# normalize quoting of values
sed \
-e 's/"//g' \
-e "s/'//g"
}
# Extract the effective command line arguments for the docker daemon
#
# Accounts for multiple specifications, takes the last option.
# Accounts for long and short variants, call with short option
# Does not account for option default or implicit options.
get_docker_effective_command_line_args() {
OPTION="$1"
get_docker_cumulative_command_line_args "$OPTION" | tail -n1
}
get_docker_configuration_file_args() {
OPTION="$1"
FILE="$(get_docker_effective_command_line_args '--config-file' | \
sed 's/.*=//g')"
if [ -f "$FILE" ]; then
CONFIG_FILE="$FILE"
elif [ -f '/etc/docker/daemon.json' ]; then
CONFIG_FILE='/etc/docker/daemon.json'
else
CONFIG_FILE='/dev/null'
fi
grep "$OPTION" "$CONFIG_FILE" | sed 's/.*: //g' | tr -d \",
}
get_systemd_service_file() {
SERVICE="$1"
if [ -f "/etc/systemd/system/$SERVICE" ]; then
echo "/etc/systemd/system/$SERVICE"
elif systemctl show -p FragmentPath "$SERVICE" 2> /dev/null 1>&2; then
systemctl show -p FragmentPath "$SERVICE" | sed 's/.*=//'
else
echo "/usr/lib/systemd/system/$SERVICE"
fi
}
yell_info() {
yell "# ------------------------------------------------------------------------------
# Docker Bench for Security v$version
#
# Docker, Inc. (c) 2015-
#
# Checks for dozens of common best-practices around deploying Docker containers in production.
# Inspired by the CIS Docker Community Edition Benchmark v1.1.0.
# ------------------------------------------------------------------------------"
}