#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-11-12; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-FileType: SOURCE
# SPDX-License-Identifier: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
# SPDX-PackageName: CISS.debian.live.builder
# SPDX-Security-Contact: security@coresecret.eu

guard_sourcing || return "${ERR_GUARD_SRCE}"

#######################################
# Integrates and generates sha512sum and GPG signatures on CISS specific LIVE boot artifacts:
#  - /root/.ciss/attestation/VAR_SIGNING_KEY_FPR.*
#  - /etc/initramfs-tools/files/unlock_wrapper.sh
#  - /usr/lib/live/boot/0030-ciss-verify-checksums
# Globals:
#   BASH_SOURCE
#   VAR_HANDLER_BUILD_DIR
#   VAR_SIGNING_KEY_FPR
#   VAR_SIGNING_KEY_PASSFILE
#   VAR_WORKDIR
# Arguments:
#   None
# Returns:
#   0: on success
#######################################
ciss_upgrades_boot() {
  printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 %s starting ... \e[0m\n" "${BASH_SOURCE[0]}"

  gpg --batch --yes --export "${VAR_SIGNING_KEY_FPR}" >| "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/.ciss/attestation/${VAR_SIGNING_KEY_FPR}.gpg"

  declare -ar _ary_target=(
    "/root/.ciss/attestation/${VAR_SIGNING_KEY_FPR}.gpg"
    "/etc/initramfs-tools/files/unlock_wrapper.sh"
    "/usr/lib/live/boot/0030-ciss-verify-checksums"
  )

  declare _target="" target=""

  for _target in "${_ary_target[@]}"; do

    declare target="${VAR_HANDLER_BUILD_DIR}/config/includes.chroot${_target}"

    declare var_sha="${target}.sha512sum.txt"
    declare var_sig="${var_sha}.sig"
    declare var_fil="${target}"
    declare var_prefix="${VAR_HANDLER_BUILD_DIR}/config/includes.chroot"

    # shellcheck disable=SC2312
    sha512sum "${var_fil}" | sed "s|${var_prefix}||" >| "${var_sha}"

    gpg --batch --yes --pinentry-mode loopback --passphrase-file "${VAR_SIGNING_KEY_PASSFILE}" --local-user "${VAR_SIGNING_KEY_FPR}" \
      --detach-sign --output "${var_sig}" "${var_sha}"

  done

  mv "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/usr/lib/live/boot/0030-ciss-verify-checksums.sha512sum.txt" \
    "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/etc/ciss/hashes/0030-ciss-verify-checksums.sha512sum.txt"
  mv "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/usr/lib/live/boot/0030-ciss-verify-checksums.sha512sum.txt.sig" \
    "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/etc/ciss/signatures/0030-ciss-verify-checksums.sha512sum.txt.sig"

  [[ -e "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/usr/lib/live/boot/0030-verify-checksums" ]] && \
    rm -f "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/usr/lib/live/boot/0030-verify-checksums"

  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ %s successfully applied. \e[0m\n" "${BASH_SOURCE[0]}"

  return 0
}
### Prevents accidental 'unset -f'.
# shellcheck disable=SC2034
readonly -f ciss_upgrades_boot
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh