Marc S. Weidner
60374476ab
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
133 lines
5.2 KiB
Bash
133 lines
5.2 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-11-10; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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set -Ceuo pipefail
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printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
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### Declare Arrays, HashMaps, and Variables.
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declare var_logfile="/root/.ciss/cdlb/log/0021_dropbear_initramfs.log"
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[[ -r /root/ciss_xdg_tmp.sh ]] && . /root/ciss_xdg_tmp.sh
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export DEBIAN_FRONTEND="noninteractive"
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export INITRD="No"
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apt-get install -y --no-install-recommends --no-install-suggests cryptsetup-initramfs dropbear-initramfs dropbear-bin 2>&1 | tee -a "${var_logfile}"
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apt-get purge -y dropbear 2>&1 | tee -a "${var_logfile}" || true
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apt-get install -y --no-install-recommends --no-install-suggests gpgv 2>&1 | tee -a "${var_logfile}"
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apt-mark hold dropbear dropbear-initramfs 2>&1 | tee -a "${var_logfile}"
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mkdir -p /root/.ciss/cdlb/backup/usr/share/initramfs-tools/scripts/init-premount
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mv /usr/share/initramfs-tools/scripts/init-premount/dropbear /root/.ciss/cdlb/backup/usr/share/initramfs-tools/scripts/init-premount/dropbear.trixie
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install -m 0755 -o root -g root /root/dropbear.file /usr/share/initramfs-tools/scripts/init-premount/dropbear
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rm -f /root/dropbear.file
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mkdir -p /root/.ciss/cdlb/backup/usr/sbin
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mv /usr/sbin/dropbear /root/.ciss/cdlb/backup/usr/sbin/dropbear.trixie
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install -m 0755 -o root -g root /root/build/dropbear-2025.88/dropbear /usr/sbin/
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mkdir -p /root/.ciss/cdlb/backup/usr/bin
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for var_file in dbclient dropbearconvert dropbearkey; do
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mv "/usr/bin/${var_file}" "/root/.ciss/cdlb/backup/usr/bin/${var_file}.trixie"
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install -m 0755 -o root -g root "/root/build/dropbear-2025.88/${var_file}" /usr/bin/
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done
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mkdir -p /etc/initramfs-tools/scripts/init-bottom
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cat << 'EOF' >| /etc/initramfs-tools/scripts/init-bottom/zzzz-dropbear-kill
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#!/bin/sh
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-11-10; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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PREREQ=""
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prereqs() { echo "${PREREQ}"; }
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# shellcheck disable=SC2249
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case "${1}" in
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prereqs) prereqs; exit 0 ;;
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esac
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### Stop dropbear shipped in the initramfs after root pivot.
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[ -x /bin/pidof ] || exit 0
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P=$(/bin/pidof dropbear 2>/dev/null) || true
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[ -n "${P}" ] || exit 0
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/bin/kill -TERM "${P}" 2>/dev/null || true
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/bin/sleep 1
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/bin/kill -KILL "${P}" 2>/dev/null || true
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exit 0
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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EOF
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chmod 0755 /etc/initramfs-tools/scripts/init-bottom/zzzz-dropbear-kill
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cat << EOF >| /etc/apt/preferences.d/99-mask-dropbear
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-11-10; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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# Never install the dropbear daemon package at all.
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Package: dropbear
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Pin: release *
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Pin-Priority: -1
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf
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EOF
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cat << EOF >| /etc/apt/preferences.d/99-mask-dropbear-initramfs
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-11-10; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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# Keep the currently installed initramfs integration; never upgrade it.
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Package: dropbear-initramfs
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Pin: release *
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Pin-Priority: -1
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf
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EOF
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systemctl mask dropbear.service dropbear.socket
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printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
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exit 0
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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