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380 lines
8.0 KiB
380 lines
8.0 KiB
#!/bin/sh
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log_write() {
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local facility=kern.$1
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logger -t AppArmor -p $facility "$2"
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}
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AA_STATUS=/usr/sbin/aa-status
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SECURITYFS=/sys/kernel/security
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SFS_MOUNTPOINT="${SECURITYFS}/apparmor"
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PARSER=/sbin/apparmor_parser
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PARSER_OPTS=
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ADDITIONAL_PROFILE_DIR=
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[ -d /etc/apparmor.d ] && PROFILE_DIRS=/etc/apparmor.d ||
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log_write warning "Unable to find profiles: /etc/apparmor.d"
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[ -n "$ADDITIONAL_PROFILE_DIR" ] && [ -d "$ADDITIONAL_PROFILE_DIR" ] &&
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PROFILE_DIRS="$PROFILE_DIRS $ADDITIONAL_PROFILE_DIR"
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dir_is_empty() {
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[ "$(du -s $1 | cut -f 1)" -eq 0 ] && return 0 || return 1
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}
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profiles_loaded_count() {
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[ -f ${SFS_MOUNTPOINT}/profiles ] &&
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return $(cat "${SFS_MOUNTPOINT}/profiles" | wc -l) || return 0
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}
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is_profiles_loaded() {
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[ -f ${SFS_MOUNTPOINT}/profiles ] && {
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rc=$(cat "${SFS_MOUNTPOINT}/profiles" | wc -l)
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[ "$rc" -ne 0 ] && return 0 || return 1
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}
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return 1
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}
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is_container_with_internal_policy() {
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local ns_stacked_path="${SFS_MOUNTPOINT}/.ns_stacked"
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local ns_name_path="${SFS_MOUNTPOINT}/.ns_name"
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local ns_stacked
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local ns_name
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if ! [ -f "$ns_stacked_path" ] || ! [ -f "$ns_name_path" ]; then
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return 1
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fi
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read -r ns_stacked < "$ns_stacked_path"
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if [ "$ns_stacked" != "yes" ]; then
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return 1
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fi
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# LXD and LXC set up AppArmor namespaces starting with "lxd-" and
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# "lxc-", respectively. Return non-zero for all other namespace
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# identifiers.
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read -r ns_name < "$ns_name_path"
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if [ "${ns_name#lxd-*}" = "$ns_name" ] && \
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[ "${ns_name#lxc-*}" = "$ns_name" ]; then
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return 1
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fi
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return 0
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}
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skip_profile() {
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local profile="$1"
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if [ "${profile%.rpmnew}" != "$profile" ] || \
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[ "${profile%.rpmsave}" != "$profile" ] || \
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[ "${profile%.orig}" != "$profile" ] || \
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[ "${profile%.rej}" != "$profile" ] || \
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[ "${profile%\~}" != "$profile" ] ; then
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return 1
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fi
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# Silently ignore the dpkg, pacman, ipk and xbps files
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if [ "${profile%.dpkg-new}" != "$profile" ] || \
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[ "${profile%.dpkg-old}" != "$profile" ] || \
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[ "${profile%.dpkg-dist}" != "$profile" ] || \
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[ "${profile%.dpkg-bak}" != "$profile" ] || \
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[ "${profile%.dpkg-remove}" != "$profile" ] || \
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[ "${profile%.ipk}" != "$profile" ] || \
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[ "${profile%.ipk-new}" != "$profile" ] || \
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[ "${profile%.ipk-old}" != "$profile" ] || \
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[ "${profile%.ipk-dist}" != "$profile" ] || \
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[ "${profile%.ipk-bak}" != "$profile" ] || \
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[ "${profile%.ipk-remove}" != "$profile" ] || \
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[ "${profile%.pacsave}" != "$profile" ] || \
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[ "${profile%.pacnew}" != "$profile" ] ; then
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return 2
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fi
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$(echo "$profile" | grep -E -q '^.+\.new-[0-9\.]+_[0-9]+$'); [ "$?" -eq 0 ] && return 2
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return 0
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}
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__parse_profiles_dir() {
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local parser_cmd="$1"
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local profile_dir="$2"
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local status=0
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[ -x "$PARSER" ] || {
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log_write err "Unable to execute AppArmor parser"
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return 1
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}
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[ -d "$profile_dir" ] || {
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log_write warning "AppArmor profiles not found: $profile_dir"
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return 1
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}
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dir_is_empty "$profile_dir"; [ "$?" -eq 0 ] && {
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log_write err "No profiles found in $profile_dir"
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return 1
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}
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local nprocs=$(cat /proc/cpuinfo |grep "processor\t:"|wc -l)
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local rc=0
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local xargs_args=""
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[ "$nprocs" -ge 2 ] && xargs_args="--max-procs=$nprocs"
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"$PARSER" $PARSER_OPTS "$parser_cmd" -- "$profile_dir" || {
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for profile in "$profile_dir"/*; do
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skip_profile "$profile"
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skip=$?
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[ "$skip" -ne 0 ] && {
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[ "$skip" -ne 2 ] && log_write info "Skipped loading profile $profile"
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continue
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}
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[ -f "$profile" ] || continue
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echo "$profile"
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done | \
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# Use xargs to parallelize calls to the parser over all CPUs
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/usr/libexec/xargs-findutils -n1 -d"\n" $xargs_args \
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"$PARSER" $PARSER_OPTS "$parser_cmd" --
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[ "$?" -ne 0 ] && {
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rc=1
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log_write err "At least one profile failed to load"
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}
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}
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return $rc
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}
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parse_profiles() {
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case "$1" in
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load)
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PARSER_CMD="--add"
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PARSER_MSG="Loading profiles"
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;;
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reload)
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PARSER_CMD="--replace"
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PARSER_MSG="Reloading profiles"
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;;
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*)
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log_write err "Unknown parameter $1"
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log_write info "parse_profiles parameter must be either 'load' or 'reload'"
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return 1
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;;
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esac
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log_write info "$PARSER_MSG"
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[ -w "$SFS_MOUNTPOINT/.load" ] || {
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log_write err "${SFS_MOUNTPOINT}/.load not writable"
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return 1
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}
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[ -f "$PARSER" ] || {
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log_write err "AppArmor parser not found"
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return 1
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}
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# run parser on all profiles
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local rc=0
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for profile_dir in $PROFILE_DIRS; do
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__parse_profiles_dir "$PARSER_CMD" "$profile_dir" || rc=$?
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done
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return $rc
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}
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is_apparmor_loaded() {
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is_securityfs_mounted; [ "$?" -eq 0 ] || {
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mount_securityfs
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}
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[ -f "${SFS_MOUNTPOINT}/profiles" ] && return 0
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[ -d /sys/module/apparmor ] && return 0 || return 1
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}
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is_securityfs_mounted() {
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[ -d "$SECURITYFS" ] && {
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grep -q securityfs /proc/filesystems && grep -q securityfs /proc/mounts
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return $?
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}
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return 1
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}
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mount_securityfs() {
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local rc=0
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grep -q securityfs /proc/filesystems; [ "$?" -eq 0 ] && {
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mount -t securityfs securityfs "$SECURITYFS"
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rc=$?
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[ "$rc" -eq 0 ] && log_write info "Mounting securityfs" ||
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log_write err "Failed to mount securityfs"
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}
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return $rc
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}
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apparmor_start() {
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local announced=0
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is_securityfs_mounted; [ "$?" -ne 0 ] && {
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log_write info "Starting AppArmor"
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announced=1
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mount_securityfs; [ "$?" -eq 0 ] || return $?
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}
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is_apparmor_loaded; [ "$?" -eq 0 ] || {
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[ "$announced" -eq 0 ] && log_write info "Starting AppArmor"
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announced=1
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log_write err "AppArmor kernel support is not present"
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return 1
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}
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[ -d /var/lib/apparmor ] || mkdir -p /var/lib/apparmor > /dev/null
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is_profiles_loaded; [ "$?" -eq 0 ] || {
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[ "$announced" -eq 0 ] && log_write info "Starting AppArmor"
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announced=1
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parse_profiles load
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return $?
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} || {
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parse_profiles reload
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return $?
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}
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}
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remove_profiles() {
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log_write info "Unloading profiles"
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is_apparmor_loaded; [ "$?" -eq 0 ] || {
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log_write err "AppArmor kernel support is not present"
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return 1
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}
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[ -w "$SFS_MOUNTPOINT/.remove" ] || {
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log_write err "${SFS_MOUNTPOINT}/.remove not writable"
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return 1
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}
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[ -x "$PARSER" ] || {
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log_write err "Unable to execute AppArmor parser"
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return 1
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}
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local rc=0
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sed -e "s/ (\(enforce\|complain\))$//" "$SFS_MOUNTPOINT/profiles" | \
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LC_COLLATE=C sort | grep -v // | {
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while read -r profile ; do
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printf "%s" "$profile" > "$SFS_MOUNTPOINT/.remove"
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result=$?
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[ "$result" -eq 0 ] || rc=$result
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done
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}
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return $rc
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}
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apparmor_stop() {
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is_apparmor_loaded; [ "$?" -eq 0 ] || return 1
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is_profiles_loaded; [ "$?" -eq 0 ] && {
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log_write info "Stopping AppArmor"
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remove_profiles
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return $?
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} || return 0
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}
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apparmor_restart() {
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is_profiles_loaded; [ "$?" -eq 0 ] || {
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apparmor_start
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return $?
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}
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is_apparmor_loaded; [ "$?" -eq 0 ] || {
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apparmor_start
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return $?
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}
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log_write info "Restarting AppArmor"
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parse_profiles reload
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return $?
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}
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apparmor_reload() {
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is_profiles_loaded; [ "$?" -eq 0 ] || {
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apparmor_start
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return $?
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}
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is_apparmor_loaded; [ "$?" -eq 0 ] || {
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apparmor_start
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return $?
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}
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log_write info "Reloading AppArmor"
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parse_profiles reload
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return $?
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}
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apparmor_list_profiles() {
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is_apparmor_loaded; [ "$?" -eq 0 ] || {
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echo "AppArmor kernel support is not present"
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return 1
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}
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[ -x "$PARSER" ] || {
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echo "Unable to execute AppArmor parser"
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return 1
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}
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# run parser on all profiles
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for profile_dir in $PROFILE_DIRS; do
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[ -d "$profile_dir" ] || {
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echo "AppArmor profiles not found: $profile_dir"
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continue
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}
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for profile in "$profile_dir"/*; do
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if skip_profile "$profile" && [ -f "$profile" ] ; then
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LIST_ADD=$("$PARSER" -N "$profile" )
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[ "$?" -eq 0 ] && echo "$LIST_ADD"
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fi
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done
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done
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return 0
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}
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apparmor_status() {
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is_apparmor_loaded; [ "$?" -eq 0 ] || {
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echo "AppArmor kernel support is not present"
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return 1
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}
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[ -x "$AA_STATUS" ] && {
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"$AA_STATUS" --verbose
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return $?
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}
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echo "AppArmor is enabled."
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echo "Install apparmor-utils to receive more detailed status"
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echo "information or examine $SFS_MOUNTPOINT directly."
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return 0
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}
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