meta-security/classes/aide-db-init.bbclass

#
# Copyright 2022 Armin Kuster <akuster808@gmail.com>
#
# This class creates the initial aide database durning
# the build cycle allowing for that set being skipped during boot
# It has an additional benefit of having not being tamper with
# after build.
#
# To have the aide db created during build
# 1. Extend local.conf:
#    INHERIT += "adie-init-db"
#
# These are the defaults as defined in aide-base.bbclass
# They can be overriden in your local.conf or other distro include 
#
# To define where the share directory should be.
#    STAGING_AIDE_DIR = "${TMPDIR}/work-shared/${MACHINE}/aida"
#
# To define which directories should be inclued in a scan
#    AIDE_INCLUDE_DIRS ?= "/lib"
#
# To exclude directories and files from being scanned
#    AIDE_SKIP_DIRS ?= "/lib/modules/.\*"
#
# To controll if a db init should happen at postint 
#    AIDE_SCAN_POSTINIT ?= "0"
#
# To cotroll if a db recan should be run at postinit
#    AIDE_RESCAN_POSTINIT ?= "0"

inherit aide-base 

aide_init_db() {
    for dir in ${AIDE_INCLUDE_DIRS}; do
        echo "${IMAGE_ROOTFS}${dir} NORMAL" >> ${STAGING_AIDE_DIR}/aide.conf
    done
    for dir in ${AIDE_SKIP_DIRS}; do
        echo "!${IMAGE_ROOTFS}${dir}" >> ${STAGING_AIDE_DIR}/aide.conf
    done


    ${STAGING_AIDE_DIR}/bin/aide -c ${STAGING_AIDE_DIR}/aide.conf --init
    gunzip ${STAGING_AIDE_DIR}/lib/aide.db.gz 
    # strip out native path
    sed -i -e 's:${IMAGE_ROOTFS}::' ${STAGING_AIDE_DIR}/lib/aide.db
    gzip -9 ${STAGING_AIDE_DIR}/lib/aide.db 
    cp -f ${STAGING_AIDE_DIR}/lib/aide.db.gz ${IMAGE_ROOTFS}${libdir}/aide
}

EXTRA_IMAGEDEPENDS:append = " aide-native"

ROOTFS_POSTPROCESS_COMMAND:append = " aide_init_db;"