Marc S. Weidner
0169be5527
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
76 lines
3.0 KiB
Bash
76 lines
3.0 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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# Hardening files and directories.
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# Globals:
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# RECOVERY
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# TARGET
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# VAR_RUN_RECOVERY
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# VAR_SETUP_PATH
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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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hardening_files() {
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declare var_bin="" var_binary=""
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declare var_target="${TARGET}"
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### Check for TARGET / RECOVERY.
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[[ "${VAR_RUN_RECOVERY}" == "true" ]] && var_target="${RECOVERY}"
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chmod 0700 "${var_target}/etc/cron.d" "${var_target}/etc/cron.daily" "${var_target}/etc/cron.hourly" "${var_target}/etc/cron.monthly" \
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"${var_target}/etc/cron.weekly"
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chmod 0700 "${var_target}/etc/sudoers.d"
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chmod 0700 "${var_target}/etc/crontab"
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[[ -f "${var_target}/etc/cron.deny" ]] && rm "${var_target}/etc/cron.deny"
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### /etc/issue ---------------------------------------------------------------------------------------------------------------
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rm -f "${var_target}/etc/issue" "${var_target}/etc/issue.net"
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install -m 0644 -o root -g root "${VAR_SETUP_PATH}/includes/target/etc/issue" "${var_target}/etc/issue"
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install -m 0644 -o root -g root "${VAR_SETUP_PATH}/includes/target/etc/issue.net" "${var_target}/etc/issue.net"
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### /root/.ansible -----------------------------------------------------------------------------------------------------------
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install -d -m 0700 -o root -g root "${var_target}/root/.ansible"
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### /usr/bin/compiler --------------------------------------------------------------------------------------------------------
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for var_bin in as gcc g++ cc clang; do
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var_binary=$(readlink -f "${var_target}/usr/bin/${var_bin}") || {
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do_log "info" "file_only" "4430() Binary: '${var_bin}' not found, skipping."
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continue
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}
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chmod 0700 "${var_binary}" || {
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do_log "info" "file_only" "4430() Binary chmod 0700: '${var_bin}' failed, skipping."
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}
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done
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### /etc/update-motd.d/10-uname ----------------------------------------------------------------------------------------------
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mkdir -p "${var_target}/root/.ciss/cdi/backup/etc/update-motd.d"
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cp -af "${var_target}/etc/update-motd.d/10-uname" "${var_target}/root/.ciss/cdi/backup/etc/update-motd.d/10-uname"
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cat << 'EOF' >| "${var_target}/etc/update-motd.d/10-uname"
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#!/bin/sh
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uname -snrm
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EOF
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chmod 0755 /etc/update-motd.d/10-uname
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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 hardening_files
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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