Marc S. Weidner
140f82829e
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
99 lines
3.5 KiB
Bash
99 lines
3.5 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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: EUPL-1.2 OR LicenseRef-CCLA-1.0
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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.installer
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# SPDX-Security-Contact: security@coresecret.eu
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guard_sourcing
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#######################################
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# Install the 'dropbear-initramfs' and replace the binaries with those from the previous Ultra Hardened build.
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# Globals:
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# DIR_TMP
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# TARGET
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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dropbear_initramfs() {
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### Declare Arrays, HashMaps, and Variables.
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declare var_file=""
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declare -r var_logfile="/root/.ciss/cdi/log/4311_dropbear_initramfs.log"
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chroot_logger "${TARGET}${var_logfile}"
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chroot_script "${TARGET}" '
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export INITRD=No
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apt-get install -y --no-install-recommends --no-install-suggests dropbear-initramfs dropbear-bin 2>&1 | tee -a '"${var_logfile}"'
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echo ExitCode: $? >> '"${var_logfile}"'
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'
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chroot_script "${TARGET}" '
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export INITRD=No
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apt-get purge -y dropbear dropbear-run || true
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echo ExitCode: $? >> '"${var_logfile}"'
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'
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chroot_script "${TARGET}" '
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export INITRD=No
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apt-get install -y --no-install-recommends --no-install-suggests gpgv 2>&1 | tee -a '"${var_logfile}"'
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echo ExitCode: $? >> '"${var_logfile}"'
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'
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chroot_script "${TARGET}" '
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export INITRD=No
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apt-mark hold dropbear dropbear-initramfs 2>&1 | tee -a '"${var_logfile}"'
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echo ExitCode: $? >> '"${var_logfile}"'
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'
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mv "${TARGET}/usr/sbin/dropbear" "${TARGET}/usr/sbin/dropbear.trixie"
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install -D -m 0755 -o root -g root "${DIR_TMP}/build/dropbear-2025.88/dropbear" "${TARGET}/usr/sbin/"
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do_log "debug" "file_only" "4311() Installation [dropbear] successful."
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for var_file in dbclient dropbearconvert dropbearkey; do
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mv "${TARGET}/usr/bin/${var_file}" "${TARGET}/usr/bin/${var_file}.trixie"
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install -D -m 0755 -o root -g root "${DIR_TMP}/build/dropbear-2025.88/${var_file}" "${TARGET}/usr/bin/"
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do_log "debug" "file_only" "4311() Installation [${var_file}] successful."
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done
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insert_header "${TARGET}/etc/apt/preferences.d/99-mask-dropbear"
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insert_comments "${TARGET}/etc/apt/preferences.d/99-mask-dropbear"
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cat << 'EOF' >> "${TARGET}/etc/apt/preferences.d/99-mask-dropbear"
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# Never install the dropbear daemon package at all.
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Package: dropbear
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Pin: release *
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Pin-Priority: -1
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf
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EOF
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insert_header "${TARGET}/etc/apt/preferences.d/99-mask-dropbear-initramfs"
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insert_comments "${TARGET}/etc/apt/preferences.d/99-mask-dropbear-initramfs"
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cat << 'EOF' >> "${TARGET}/etc/apt/preferences.d/99-mask-dropbear-initramfs"
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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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chroot_script "${TARGET}" "systemctl mask dropbear.service dropbear.socket"
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do_log "info" "file_only" "4311() Masked: [dropbear.service dropbear.socket]"
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guard_dir && return 0
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f dropbear_initramfs
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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