V8.13.536.2025.12.04

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

.archive/0100_ciss_mem_wipe.chroot

@@ -0,0 +1,302 @@
+#!/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: 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
+set -Ceuo pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+
+[[ -r /root/ciss_xdg_tmp.sh ]] && . /root/ciss_xdg_tmp.sh
+export DEBIAN_FRONTEND="noninteractive"
+export INITRD="No"
+
+apt-get install -y --no-install-recommends kexec-tools
+
+install -d -m 0755 /boot/ciss-memwipe
+install -d -m 0755 /usr/local/sbin
+install -d -m 0755 /etc/systemd/system
+install -d -m 0755 /etc/default
+
+### Pick a kernel to kexec into: use the latest installed vmlinuz. -------------------------------------------------------------
+# shellcheck disable=SC2012,SC2155
+declare _KERNEL="$(cd /boot && ls -1 vmlinuz-* | sed 's|vmlinuz-||' | sort -V | tail -n1)"
+cp -f "/boot/vmlinuz-${_KERNEL}" /boot/ciss-memwipe/vmlinuz
+
+### Build minimal initramfs with a busybox and a tiny '/init'. -----------------------------------------------------------------
+declare _TMP_DIR; _TMP_DIR="$(mktemp -d)"
+trap 'rm -rf "${_TMP_DIR}"' EXIT
+
+mkdir -p "${_TMP_DIR}"/{bin,dev,proc,sys,wipe}
+
+### Locate the current busybox binary. -----------------------------------------------------------------------------------------
+declare _BUSYBOX_BIN; _BUSYBOX_BIN="$(command -v busybox || true)"
+if [[ -z "${_BUSYBOX_BIN}" ]]; then
+  echo "ERROR: busybox not found after installation attempt." >&2
+  exit 42
+fi
+
+cp -f "${_BUSYBOX_BIN}" "${_TMP_DIR}/bin/busybox"
+
+#######################################
+# Copy required shared libs into the initramfs (if the busybox is dynamic).
+# Globals:
+#   _TMP_DIR
+# Arguments:
+#   1: _BUSYBOX_BIN
+# Returns:
+#   0: on success
+#######################################
+copy_libs() {
+  declare bin="$1"
+
+  if ldd "${bin}" 2>&1 | grep -q 'not a dynamic executable'; then
+    return 0
+  fi
+
+  ldd "${bin}" | awk '
+    /=> \// {print $3}
+    # some libs are printed as absolute path without "=>"
+    /^\//    {print $1}
+  ' | while read -r lib; do
+    [[ -n "${lib}" ]] || continue
+    dest="${_TMP_DIR}$(dirname "${lib}")"
+    install -d -m 0755 "${dest}"
+    cp -f "${lib}" "${dest}"
+  done
+}
+
+copy_libs "${_BUSYBOX_BIN}"
+
+### Generate '/init' script ----------------------------------------------------------------------------------------------------
+cat << 'EOF' >| "${_TMP_DIR}/init"
+#!/bin/busybox sh
+# 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: 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
+
+# Minimal init to wipe RAM, then power off.
+# Parses cmdline: ciss_wipe_passes=2 ciss_wipe_mode=zero+random ciss_dd_bs=64M ciss_tmpfs_pct=95
+set -eu
+
+#######################################
+# Helper
+# Globals:
+#   None
+# Arguments:
+#   1: key
+# Returns:
+#   0: on success
+#######################################
+get_arg() { # $1=key ; echoes value or empty
+  for tok in $(cat /proc/cmdline); do
+    case "$tok" in
+      $1=*) echo "${tok#*=}"; return 0;;
+    esac
+  done
+  echo ""
+}
+
+mount -t devtmpfs devtmpfs /dev 2>/dev/null || true
+[ -e /dev/console ] || mknod -m 600 /dev/console c 5 1
+[ -e /dev/null ]    || mknod -m 666 /dev/null c 1 3
+[ -e /dev/urandom ] || mknod -m 444 /dev/urandom c 1 9
+
+mount -t proc proc /proc
+mount -t sysfs sysfs /sys
+
+PASSES="$(get_arg ciss_wipe_passes)"; [ -n "${PASSES}" ] || PASSES=2
+MODE="$(get_arg ciss_wipe_mode)"; [ -n "${MODE}" ] || MODE="zero+random"
+BS="$(get_arg ciss_dd_bs)"; [ -n "${BS}" ] || BS=64M
+PCT="$(get_arg ciss_tmpfs_pct)"; [ -n "${PCT}" ] || PCT=95
+
+echo 1 >| /proc/sys/kernel/printk 2>/dev/null || true
+
+MEM_KB="$(awk '/MemTotal:/ {print $2}' /proc/meminfo)"
+SIZE_KB=$(( MEM_KB * PCT / 100 ))
+mount -t tmpfs -o "size=${SIZE_KB}k,nodev,nosuid,noexec,mode=0700" tmpfs /wipe
+
+#######################################
+# Wipe helper
+# Globals:
+#   None
+# Arguments:
+#   1: pattern
+# Returns:
+#   0: on success
+#######################################
+wipe_pass() {
+  pattern="$1" # zero or random
+  if [ "$pattern" = "zero" ]; then
+    src="/dev/zero"
+  else
+    src="/dev/urandom"
+  fi
+
+  i=0
+  while :; do
+    # Use busybox dd explicitly to avoid surprises
+    busybox dd if="$src" of="/wipe/block_$i" bs="$BS" status=none || break
+    i=$((i+1))
+  done
+  sync
+  echo 3 > /proc/sys/vm/drop_caches 2>/dev/null || true
+  rm -f /wipe/block_* 2>/dev/null || true
+  sync
+  return 0
+}
+
+DO_ZERO=0; DO_RANDOM=0
+case "$MODE" in
+  zero) DO_ZERO=1 ;;
+  random) DO_RANDOM=1 ;;
+  zero+random|random+zero) DO_ZERO=1; DO_RANDOM=1 ;;
+  *) DO_ZERO=1 ;;
+esac
+
+p=1
+while [ $p -le "$PASSES" ]; do
+  [ $DO_ZERO -eq 1 ] && wipe_pass zero
+  [ $DO_RANDOM -eq 1 ] && wipe_pass random
+  p=$((p+1))
+done
+
+sync
+busybox poweroff -f || echo o >| /proc/sysrq-trigger
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
+EOF
+
+chmod +x "${_TMP_DIR}/init"
+
+### Create the initramfs archive -----------------------------------------------------------------------------------------------
+( cd "${_TMP_DIR}" && find . -print0 | cpio --null -ov --format=newc ) | gzip -9 > /boot/ciss-memwipe/initrd.img
+
+### Default configuration.
+cat << 'EOF' >| /etc/default/ciss-memwipe
+# 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: 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
+
+# CISS Memory Wipe defaults:
+
+CISS_WIPE_PASSES=2             # number of passes
+CISS_WIPE_MODE="zero+random"   # zero | random | zero+random
+CISS_WIPE_DD_BS="64M"          # dd block size
+CISS_WIPE_TMPFS_PCT=95         # percentage of MemTotal to allocate
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf
+EOF
+
+### Helper script --------------------------------------------------------------------------------------------------------------
+cat << 'EOF' >| /usr/local/sbin/ciss-memwipe
+#!/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: 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
+set -euo pipefail
+
+. /etc/default/ciss-memwipe || true
+
+KERNEL="/boot/ciss-memwipe/vmlinuz"
+INITRD="/boot/ciss-memwipe/initrd.img"
+
+append_common="quiet loglevel=1 ciss_wipe_passes=${CISS_WIPE_PASSES:-2} ciss_wipe_mode=${CISS_WIPE_MODE:-zero+random} ciss_dd_bs=${CISS_WIPE_DD_BS:-64M} ciss_tmpfs_pct=${CISS_WIPE_TMPFS_PCT:-95}"
+
+prepare() {
+  if [ -w /proc/sys/kernel/kexec_load_disabled ] && [ "$(cat /proc/sys/kernel/kexec_load_disabled)" = "1" ]; then
+    echo 0 > /proc/sys/kernel/kexec_load_disabled || true
+  fi
+  if command -v kexec >/dev/null 2>&1 && [ -s "$KERNEL" ] && [ -s "$INITRD" ]; then
+    kexec -l "$KERNEL" --initrd="$INITRD" --append="$append_common" || true
+  fi
+}
+
+fallback_inplace() {
+  mount -t tmpfs -o "size=95%,nodev,nosuid,noexec,mode=0700" tmpfs /run/wipe 2>/dev/null || mkdir -p /run/wipe
+  i=0
+  while :; do
+    dd if=/dev/zero of="/run/wipe/blk_$i" bs="${CISS_WIPE_DD_BS:-64M}" status=none || break
+    i=$((i+1))
+  done
+  sync; echo 3 > /proc/sys/vm/drop_caches 2>/dev/null || true
+  rm -f /run/wipe/blk_* 2>/dev/null || true
+  sync
+  systemctl poweroff -f || poweroff -f || echo o > /proc/sysrq-trigger
+}
+
+execute() {
+  sync; echo 3 > /proc/sys/vm/drop_caches 2>/dev/null || true
+  if command -v systemctl >/dev/null 2>&1 && systemctl --quiet is-system-running; then
+    systemctl kexec || kexec -e || fallback_inplace
+  else
+    kexec -e || fallback_inplace
+  fi
+}
+
+case "${1:-}" in
+  prepare) prepare ;;
+  execute) execute ;;
+  *) echo "Usage: $0 {prepare|execute}" >&2; exit 2 ;;
+esac
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
+EOF
+chmod 0755 /usr/local/sbin/ciss-memwipe
+
+### Systemd service: load at boot, execute on shutdown. ------------------------------------------------------------------------
+cat << 'EOF' >| /etc/systemd/system/ciss-memwipe.service
+[Unit]
+Description=CISS: preload and execute kexec-based RAM wipe on shutdown
+DefaultDependencies=no
+Before=shutdown.target
+After=local-fs.target network.target multi-user.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/local/sbin/ciss-memwipe prepare
+ExecStop=/usr/local/sbin/ciss-memwipe execute
+TimeoutStartSec=20s
+TimeoutStopSec=infinity
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+install -d -m 0755 /etc/systemd/system/multi-user.target.wants
+ln -sf /etc/systemd/system/ciss-memwipe.service /etc/systemd/system/multi-user.target.wants/ciss-memwipe.service
+
+systemctl enable ciss-memwipe.service
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

.archive/generate_PRIVATE_trixie_0.yaml

@@ -9,7 +9,7 @@
 # SPDX-PackageName: CISS.debian.live.builder
 # SPDX-Security-Contact: security@coresecret.eu
 
-# Version Master V8.13.528.2025.12.03
+# Version Master V8.13.536.2025.12.04
 
 name: 🔐 Generating a Private Live ISO TRIXIE.
 

.archive/generate_PRIVATE_trixie_1.yaml

@@ -9,7 +9,7 @@
 # SPDX-PackageName: CISS.debian.live.builder
 # SPDX-Security-Contact: security@coresecret.eu
 
-# Version Master V8.13.528.2025.12.03
+# Version Master V8.13.536.2025.12.04
 
 name: 🔐 Generating a Private Live ISO TRIXIE.
 

.archive/generate_PUBLIC_iso.yaml

@@ -9,7 +9,7 @@
 # SPDX-PackageName: CISS.debian.live.builder
 # SPDX-Security-Contact: security@coresecret.eu
 
-# Version Master V8.13.528.2025.12.03
+# Version Master V8.13.536.2025.12.04
 
 name: 💙 Generating a PUBLIC Live ISO.