#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-10-11; 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: EUPL-1.2 OR LicenseRef-CCLA-1.0
# 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
set -Ceuo pipefail

printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"

if ! command -v chage &>/dev/null; then

  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Info: 'chage' NOT found. Exiting hook ... \e[0m\n"
  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"

  exit 0

fi

declare -i max_days=16384
# shellcheck disable=SC2312
mapfile -t users_to_update < <(
  awk -F: '$2 !~ /^[!*]/ { print $1 }' /etc/shadow
)

if [[ ${#users_to_update[@]} -eq 0 ]]; then

  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ No enabled-login accounts found in /etc/shadow. Exiting hook ... \e[0m\n"
  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"

  exit 0

fi

declare user
for user in "${users_to_update[@]}"; do
  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Setting max password age for user '%s' to '%s' days. \e[0m\n" "${user}" "${max_days}"
  chage --maxdays "${max_days}" "${user}"
done

unset max_days user users_to_update

awk -F: '$2 !~ /^\$[0-9]/ && length($2)==13 { print $1,$2 }' /etc/shadow

printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ All applicable accounts have been updated. \e[0m\n"

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

exit 0
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh