V8.13.408.2025.11.13

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

config/hooks/live/zzzz_ciss_crypt_squash.hook.binary

@@ -0,0 +1,133 @@
+#!/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
+
+__umask=$(umask)
+umask 0077
+
+#######################################
+# Pre allocates space for LUKS container.
+# Globals:
+#   None
+# Arguments:
+#   1: LUKS Container
+#   2: LUKS Container Size
+# Returns:
+#   0: on success
+#   42: on failure
+#######################################
+preallocate() {
+  declare file="$1" size="$2"
+  declare -i blocksize=$((8*1024*1024))
+  declare -i blockcounter=$(( (size + blocksize - 1) / blocksize ))
+
+  if fallocate -l "${size}" -- "${file}" 2>/dev/null; then
+
+    printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ [fallocate -l %s -- %s] successful. \e[0m\n" "${size}" "${file}"
+    return 0
+
+  else
+
+    printf "\e[93m++++ ++++ ++++ ++++ ++++ ++++ ++ ⚠️ [fallocate -l %s -- %s] NOT successful. \e[0m\n" "${size}" "${file}"
+
+  fi
+
+  if dd if=/dev/zero of="${file}" bs="${blocksize}" count="${blockcounter}" status=progress conv=fsync; then
+
+    printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ [dd if=/dev/zero of=%s bs=%s count=%s status=progress conv=fsync ] successful. \e[0m\n" "${file}" "${blocksize}" "${blockcounter}"
+    return 0
+
+  else
+
+    printf "\e[93m++++ ++++ ++++ ++++ ++++ ++++ ++ ⚠️ [dd if=/dev/zero of=%s bs=%s count=%s status=progress conv=fsync ] NOT successful. \e[0m\n" "${file}" "${blocksize}" "${blockcounter}"
+    return 42
+
+  fi
+}
+### Prevents accidental 'unset -f'.
+# shellcheck disable=SC2034
+readonly -f preallocate
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+
+declare ROOTFS="${VAR_HANDLER_BUILD_DIR}/binary/live/filesystem.squashfs"
+declare LUKSFS="${VAR_HANDLER_BUILD_DIR}/binary/live/ciss_rootfs.crypt"
+declare KEYFD=""
+
+# shellcheck disable=SC2155
+declare -i SIZE=$(stat -c%s -- "${ROOTFS}")
+
+### Safety margin:
+#   - LUKS2-Header and Metadata
+#   - dm-integrity Overhead (Tags and Journal)
+#   - Filesystem-Slack
+declare -i OVERHEAD_FIXED=$((64 * 1024 * 1024))
+declare -i OVERHEAD_PCT=3
+declare -i ALIGN_BYTES=$(( 2048 * 1024 ))
+declare -i BASE_SIZE=$(( SIZE + OVERHEAD_FIXED + (SIZE * OVERHEAD_PCT / 100) ))
+declare -i LUKSFS_SIZE=$(( ( (BASE_SIZE + ALIGN_BYTES - 1) / ALIGN_BYTES ) * ALIGN_BYTES ))
+
+preallocate "${LUKSFS}" "${LUKSFS_SIZE}"
+
+exec {KEYFD}<"${VAR_TMP_SECRET}/luks.txt"
+
+cryptsetup luksFormat \
+  --batch-mode \
+  --cipher aes-xts-plain64 \
+  --integrity hmac-sha512 \
+  --iter-time 1000 \
+  --key-file "/proc/$$/fd/${KEYFD}" \
+  --key-size 512 \
+  --label crypt_liveiso \
+  --luks2-keyslots-size 16777216 \
+  --luks2-metadata-size 4194304 \
+  --pbkdf argon2id \
+  --sector-size 4096 \
+  --type luks2 \
+  --use-random \
+  --verbose \
+  "${LUKSFS}"
+
+cryptsetup open --key-file "/proc/$$/fd/${KEYFD}" "${LUKSFS}" crypt_liveiso
+
+# shellcheck disable=SC2155
+declare -i LUKS_FREE=$(blockdev --getsize64 /dev/mapper/crypt_liveiso)
+declare -i SQUASH_FS="${SIZE}"
+
+if (( LUKS_FREE >= SQUASH_FS )); then
+
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ LUKS_FREE '%s' >= SQUASH_FS '%s' \e[0m\n" "${LUKS_FREE}" "${SQUASH_FS}"
+
+else
+
+  printf "\e[91m++++ ++++ ++++ ++++ ++++ ++++ ++ LUKS_FREE '%s' <= SQUASH_FS '%s' \e[0m\n" "${LUKS_FREE}" "${SQUASH_FS}" >&2
+  exit 42
+
+fi
+
+dd if="${ROOTFS}" of=/dev/mapper/crypt_liveiso bs=8M status=progress conv=fsync
+sync
+cryptsetup close crypt_liveiso
+
+exec {KEYFD}<&-
+
+shred -fzu -n 5 -- "${VAR_TMP_SECRET}/luks.txt"
+
+#rm -f -- "${ROOTFS}"
+
+umask "${__umask}"
+__umask=""
+
+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