69 lines
2.3 KiB
Bash
69 lines
2.3 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-05-05; 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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guard_sourcing || return "${ERR_GUARD_SRCE}"
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#######################################
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# Removes secrets securely before 'lb build' execution.
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# Globals:
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# BASH_SOURCE
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# VAR_TMP_SECRET
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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x_remove() {
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printf "\e[95m🧪 %s starting ... \e[0m\n" "${BASH_SOURCE[0]}"
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declare _old_nullglob="" _old_dotglob=""
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### Enable nullglob/dotglob, disable failglob for safe globbing.
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_old_nullglob="$(shopt -p nullglob || true)"
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_old_dotglob="$( shopt -p dotglob || true)"
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shopt -s nullglob dotglob
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### Collect exact currently available secret values before removing their source files.
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### Log rewriting is intentionally deferred to the final trap after xtrace has been stopped.
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collect_debug_secret_values || true
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if [[ "${VAR_SIGNER}" == "true" ]]; then
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# shellcheck disable=SC2312
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find "${VAR_TMP_SECRET}" -xdev -type f \
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! -path "${VAR_TMP_SECRET}/${VAR_SIGNING_KEY_PASS:-signing_key_pass.txt}" \
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! -path "${VAR_TMP_SECRET}/${VAR_LUKS_KEY:-luks.txt}" \
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-print0 \
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| xargs -0 --no-run-if-empty shred -fzu -n 5 --
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else
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### Removes secrets securely.
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# shellcheck disable=SC2312
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find "${VAR_TMP_SECRET}" -xdev -type f -print0 | xargs -0 --no-run-if-empty shred -fzu -n 5 --
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find "${VAR_TMP_SECRET}" -xdev -depth -type d -empty -delete
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fi
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eval "${_old_nullglob}" 2>/dev/null || true
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eval "${_old_dotglob}" 2>/dev/null || true
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printf "\e[92m✅ %s successfully applied. \e[0m\n" "${BASH_SOURCE[0]}"
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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 x_remove
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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