84 lines
2.6 KiB
Bash
84 lines
2.6 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 logrotate.
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# Globals:
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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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hardening_logrotate() {
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### Declare Arrays, HashMaps, and Variables.
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declare -ar ary_logrotate=( "alternatives" "apt" "btmp" "chrony" "dpkg" "fail2ban" "rkhunter" "ufw" "unattended-upgrades" "usbguard")
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declare var_file="" var_log=""
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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="${RECOVERY}"
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rm -f "${var_target}/etc/logrotate.conf"
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insert_header "${var_target}/etc/logrotate.conf"
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insert_comments "${var_target}/etc/logrotate.conf"
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cat << EOF >> "${var_target}/etc/logrotate.conf"
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# See "man logrotate" for details. Global options do not affect preceding include directives.
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# rotate log files daily
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daily
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# keep 128 daily worth of backlogs
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rotate 128
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# hard cap: delete rotated logs older than 384 days
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maxage 384
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# create new (empty) log files after rotating old ones
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create
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# use date as a suffix of the rotated file
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dateext
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# gzip older rotations
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compress
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# keep the most recent rotation uncompressed for one cycle
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delaycompress
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# packages drop log rotation information into this directory
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include /etc/logrotate.d
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# system-specific logs may also be configured here.
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf
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EOF
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for var_log in "${ary_logrotate[@]}"; do
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var_file="${var_target}/etc/logrotate.d/${var_log}"
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[[ -e "${var_file}" ]] || continue
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### Replace leading 'monthly'/'weekly' directives with 'daily', preserving indentation and trailing comments.
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sed -E -i \
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-e 's/^([[:space:]]*)(monthly|weekly)([[:space:]]*)(#.*)?$/\1daily\3\4/' \
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-e 's/^([[:space:]]*)rotate([[:space:]]+[0-9]+)?([[:space:]]*)(#.*)?$/\1rotate 128\3\4/' \
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"${var_file}"
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done
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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_logrotate
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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