88 lines
3.1 KiB
Bash
88 lines
3.1 KiB
Bash
#!/bin/sh
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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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# SPDX-Comment: Hook script (initramfs) for setting up the CISS.debian.installer hardened dropbear environment, incl. Luks Nuke.
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set -e
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PREREQ=""
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prereqs() { echo "$PREREQ"; }
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case $1 in
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prereqs) prereqs; exit 0 ;;
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esac
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. /usr/share/initramfs-tools/hook-functions
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if [ ! -e /etc/initramfs-tools/files/unlock-wrapper.sh ]; then
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echo "Missing unlock-wrapper.sh in /etc/initramfs-tools/files/"
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exit 1
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fi
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### Ensure directory structure in initramfs
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mkdir -p "${DESTDIR}/etc/dropbear"
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mkdir -p "${DESTDIR}/etc/keys"
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mkdir -p "${DESTDIR}/usr/local/bin"
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mkdir -p "${DESTDIR}/etc/initramfs-tools/conf.d"
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mkdir -p "${DESTDIR}/etc/initramfs-tools/scripts/init-premount"
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### Include Bash
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copy_exec /usr/bin/bash /usr/bin
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### Include Busybox
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copy_exec /usr/bin/busybox /usr/bin
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copy_exec /usr/bin/busybox /bin
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### Include lsblk (block device info tool)
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copy_exec /usr/bin/lsblk /usr/bin
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### Include mkpasswd
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copy_exec /usr/bin/mkpasswd /usr/bin
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### Include udevadm (udev management tool)
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copy_exec /usr/bin/udevadm /usr/bin
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### Include sha512sum e.g.
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copy_exec /usr/bin/sha512sum /usr/bin
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copy_exec /usr/bin/sha384sum /usr/bin
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### Include Signature-Verifier
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copy_exec /usr/bin/gpgv /usr/bin
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### Include Whois
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copy_exec /usr/bin/whois /usr/bin
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### Link busybox applets for compatibility
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for dir in bin usr/bin; do
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ln -sf busybox "${DESTDIR}/${dir}/cat"
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ln -sf busybox "${DESTDIR}/${dir}/sleep"
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done
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### Install Dropbear firewall configuration
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install -m 0444 /etc/initramfs-tools/files/dropbear_fw.cnf "${DESTDIR}/etc/initramfs-tools/conf.d/dropbear_fw.cnf"
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### Install Dropbear configuration
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install -m 0444 /etc/dropbear/initramfs/dropbear.conf "${DESTDIR}/etc/dropbear/dropbear.conf"
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### Install Dropbear Cryptroot Unlock Wrapper
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install -m 0555 /etc/initramfs-tools/files/unlock-wrapper.sh "${DESTDIR}/usr/local/bin/unlock-wrapper.sh"
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install -m 0444 /etc/initramfs-tools/files/unlock-wrapper.sh.sha384 "${DESTDIR}/usr/local/bin/unlock-wrapper.sh.sha384"
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install -m 0444 /etc/initramfs-tools/files/unlock-wrapper.sh.sha512 "${DESTDIR}/usr/local/bin/unlock-wrapper.sh.sha512"
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install -m 0444 /etc/initramfs-tools/files/unlock-wrapper.sh.sha384.sig "${DESTDIR}/usr/local/bin/unlock-wrapper.sh.sha384.sig"
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install -m 0444 /etc/initramfs-tools/files/unlock-wrapper.sh.sha512.sig "${DESTDIR}/usr/local/bin/unlock-wrapper.sh.sha512.sig"
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### Install PGP Signing Keys
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install -m 0444 /root/.ciss/keys/pubring.gpg "${DESTDIR}/etc/keys/pubring.gpg"
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### Install Dropbear Banner
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install -m 0444 /etc/dropbear/initramfs/banner "${DESTDIR}/etc/dropbear/banner"
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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