#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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.installer
# SPDX-Security-Contact: security@coresecret.eu

guard_sourcing || return "${ERR_GUARD_SOURCE}"

#######################################
# Generates 'nuke=HASH' Bootparameter.
# Globals:
#   DIR_CNF
#   VAR_NUKE_HASH
# Arguments:
#   None
# Returns:
#   0: on success
#   ERR_GENERATE_SALT
#   ERR_READ_NUKE_FILE
#######################################
nuke_passphrase() {
  declare -r var_nuke_pwd_file="${DIR_CNF}/password_luks_nuke.txt"
  declare    var_temp_nuke_hash="" var_temp_plain_nuke_pwd="" var_salt="" var_nuke_rounds=""

  # shellcheck disable=SC2312
  var_nuke_rounds="$(
    yq -r '
    .recipe
    | to_entries[]            # iterate recipe items
    | .value                  # the map under each item
    | select(has("control") and (.control | has("nuke_rounds")))
    | .control.nuke_rounds
    | tostring
  ' "${DIR_CNF}/partitioning.yaml" | head -n1
  )"

  [[ ! -f "${var_nuke_pwd_file}" ]] && return 0

  guard_trace on
  if ! read_password_file "${var_nuke_pwd_file}" var_temp_plain_nuke_pwd; then
    return "${ERR_READ_NUKE_FILE}"
  fi
  guard_trace off


  if ! var_salt="$(generate_salt)"; then
    return "${ERR_GENERATE_SALT}"
  fi


  guard_trace on
  var_temp_nuke_hash=$(mkpasswd --method=sha-512 --salt="${var_salt}" --rounds="${var_nuke_rounds:-8388608}" "${var_temp_plain_nuke_pwd}")
  guard_trace off

  declare -grx VAR_NUKE_HASH="${var_temp_nuke_hash}"
  unset var_temp_nuke_hash var_temp_plain_nuke_pwd

  do_log "debug" "file_only" "0105() NUKE hash starts with: [${VAR_NUKE_HASH:0:32}...]"

  guard_dir; return 0
}

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