V8.02.512.2025.05.30

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

.archive/icon.lib

@@ -0,0 +1,42 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+✅
+🔧
+🔑
+🖥️
+🛠️
+📥
+📦
+📑
+📂
+🔒
+🔐
+⚙️
+❌
+🌌
+🎉
+🖥️
+🔑
+📂
+📩
+🔵
+😺
+🧪
+📊
+🧾
+📀
+📉
+⏱
+🧠
+📅
+💙
+🚫
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

.editorconfig

@@ -0,0 +1,53 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# EditorConfig is awesome: https://editorconfig.org
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+tab_width = 2
+max_line_length = 128
+
+[*.conf]
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+end_of_line = lf
+# Markdown benefits from a final newline for POSIX tools
+insert_final_newline = true
+# Do not trim trailing whitespace: two spaces at end-of-line signal a hard line break in Markdown
+trim_trailing_whitespace = false
+
+#[*.toml]
+#end_of_line = lf
+#insert_final_newline = true
+## TOML values can include strings where trailing spaces may matter; better not trim
+#trim_trailing_whitespace = false
+#charset = utf-8
+
+[*.{yaml,yml}]
+end_of_line = lf
+insert_final_newline = true
+# Trim trailing whitespace (safe, since YAML does not rely on trailing spaces)
+trim_trailing_whitespace = true
+
+[*.{sh,bash,zsh}]
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf

.gitea/ISSUE_TEMPLATE/ISSUE_TEMPLATE.yaml

@@ -0,0 +1,94 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+---
+name: "Bug Report"
+about: "Create a report to help us improve"
+title: "[BUG | possible BUG]: "
+labels: "bug:to be reproduced,bug:needs triage/confirmation"
+assignees: ""
+---
+body:
+  # Instructions for the reporter
+  - type: markdown
+    attributes:
+      value: |
+        _Please provide concise information to reproduce the bug; issues lacking detail may be closed._
+  # Version information
+  - type: input
+    id: version
+    attributes:
+      label: "Version"
+      description: "Which version are you running? Use `./ciss_live_builder.sh -v`."
+      placeholder: "e.g., Master V8.02.080.2025.05.19"
+    validations:
+      required: true
+
+  # Known issues check
+  - type: textarea
+    id: known_issue
+    attributes:
+      label: "Search for known issues"
+      description: "Is this a known problem? Link to related issues or state 'none found'."
+      placeholder: "e.g., #1234 or none found"
+    validations:
+      required: true
+
+  # Reproduction steps
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: "Command line"
+      description: |
+        Which command did you run, and against which target?
+        If you prefer not to disclose publicly, use `security@coresecret.eu`.
+      placeholder: "e.g., ./ciss_live_builder.sh --debug"
+    validations:
+      required: true
+
+  # Expected behavior
+  - type: textarea
+    id: expected
+    attributes:
+      label: "Expected behavior"
+      description: "Describe clearly what you expected to happen."
+      placeholder: "e.g., Build completes without errors"
+    validations:
+      required: true
+
+  # System information
+  - type: input
+    id: os
+    attributes:
+      label: "Operating System"
+      description: "Retrieve via `awk -F\" '/PRETTY_NAME/ { print $2 }' /etc/os-release`."
+      placeholder: "e.g., Debian GNU/Linux 12 (bookworm)"
+    validations:
+      required: true
+
+  - type: input
+    id: platform
+    attributes:
+      label: "Platform"
+      description: "Retrieve via `uname -srm`."
+      placeholder: "e.g., Linux 6.12.22+bpo-amd64 x86_64"
+    validations:
+      required: true
+
+  # Additional context
+  - type: textarea
+    id: additional_context
+    attributes:
+      label: "Additional context"
+      description: "Any other information about the problem."
+      placeholder: "e.g., Logs, screenshots, configuration snippets"
+    validations:
+      required: false
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=yaml

.gitea/ISSUE_TEMPLATE/PULL_REQUEST_TEMPLATE.yaml

@@ -0,0 +1,55 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+---
+name: "Standard-PR"
+about: "Please answer the following questions before submitting the PR."
+title: "[PR]: "
+ref: "master"
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for your PR.
+  # Section for free-form description
+  - type: textarea
+    id: description
+    attributes:
+      label: "Describe your changes"
+      description: "Please refer to an issue here or describe the change thoroughly in your PR."
+      placeholder: "e.g., Fix typo in README"
+    validations:
+      required: true
+  # Section for categorizing the PR
+  - type: checkboxes
+    id: pr-type
+    attributes:
+      label: "What is your pull request about?"
+      options:
+        - label: "Bug fix"
+        - label: "Improvement"
+        - label: "New feature (adds functionality)"
+        - label: "Breaking change (existing functionality may not work)"
+        - label: "Typo fix"
+        - label: "Documentation update"
+        - label: "Update of other files"
+  # Section for code-quality checklist
+  - type: checkboxes
+    id: code-checklist
+    attributes:
+      label: "If this is a code change, please check all that apply:"
+      options:
+        - label: "My edits contain no tabs, use two-space indentation, and no trailing whitespace"
+        - label: "I have read ~/docs/CONTRIBUTING.md and ~/docs/CODING_CONVENTION.md"
+        - label: "I have tested this fix or improvement on ≥2 VMs without issues"
+        - label: "I have tested this new feature on ≥2 VMs with and without it to avoid side effects"
+        - label: "Documentation and/or 'usage()' and/or 'arg_parser' have been updated for the new feature"
+        - label: "I added myself to ~/docs/CREDITS.md (alphabetical) and updated ~/docs/CHANGELOG.md"
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=yaml

.gitea/properties/json/gitea-issue-config.json

@@ -0,0 +1,45 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "https://json.schemastore.org/gitea-issue-config.json",
+  "$comment": "https://docs.gitea.com/usage/issue-pull-request-templates#syntax-for-issue-config",
+  "properties": {
+    "blank_issues_enabled": {
+      "description": "Specify whether forms have to be used or blank issue are allowed\nhttps://docs.gitea.com/usage/issue-pull-request-templates#possible-options",
+      "type": "boolean"
+    },
+    "contact_links": {
+      "title": "contact links",
+      "description": "Contact links\nhttps://docs.gitea.com/usage/issue-pull-request-templates#possible-options",
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": ["name", "url", "about"],
+        "properties": {
+          "name": {
+            "description": "The name of your link\nhttps://docs.gitea.com/usage/issue-pull-request-templates#contact-link",
+            "type": "string",
+            "minLength": 1,
+            "examples": ["Sample name"]
+          },
+          "url": {
+            "description": "The URL of your Link\nhttps://docs.gitea.com/usage/issue-pull-request-templates#contact-link",
+            "type": "string",
+            "pattern": "^https?://",
+            "examples": ["https://sample/url"]
+          },
+          "about": {
+            "description": "A short description of your Link\nhttps://docs.gitea.com/usage/issue-pull-request-templates#contact-link",
+            "type": "string",
+            "minLength": 1,
+            "examples": ["Sample description"]
+          }
+        },
+        "additionalProperties": false
+      }
+    }
+  },
+  "additionalProperties": false,
+  "title": "Gitea issue template chooser config file schema",
+  "type": "object"
+}

.gitea/properties/json/gitea-workflow-config.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "allOf": [
+    { "$ref": "https://json.schemastore.org/github-workflow.json" },
+    {
+      "properties": {
+        "kind": { "type": "string", "enum": ["pipeline"] },
+        "type": { "type": "string", "enum": ["docker"] }
+      }
+    }
+  ]
+}

.gitea/properties/lua/linkfix.lua

@@ -0,0 +1,8 @@
+-- Linkfix.lua
+function Link (el)
+    -- wenn Linkziel auf .md endet, ändere es zu .html
+    if el.target:match('%.md$') then
+        el.target = el.target:gsub('%.md$', '.html')
+    end
+    return el
+end

.gitignore

@@ -0,0 +1,20 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+.checklist/
+.idea/
+build/
+out/
+target/
+*.DS_Store
+*.log
+*.ps1
+Thumbs.db
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf

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+N37P3BcodQWrsIJD5rlBN+mlga2JBfaJndOoYDLTuCNp63O3QO+/B+37hOYHphyu
+Z1UsyA0biHQ2exoMtUn8VrfrVaVjqeKzD5E2C2w8jKh2bNFYjbNoEhmw/ld+wTC4
+h9Da4wsNzL2ADzBfxBgFgm0uI6+7
+=5Jh4
+-----END PGP PUBLIC KEY BLOCK-----

.pubkey/zimnol_andre_h_git.cs@physnet.eu_0x8A659CC7B4D63AE6_public.asc

@@ -0,0 +1,20 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mDMEaDcAphYJKwYBBAHaRw8BAQdA/9UGPKzDSRCGirPMrePXMMynIida/McCOYe6
+PVcCPpG0MVpJTU5PTCwgQW5kcsOpIEguIFtkZXZlbG9wZXJdIDxnaXQuY3NAcGh5
+c25ldC5ldT6IkQQTFgoAORYhBBmJL29uc6075RFbVoplnMe01jrmBQJoNwCmAhsB
+BQkIpLt+AwsJCAQVCgkIAxYCAwIeBQIXgAAKCRCKZZzHtNY65jKyAQDrk2x/laEP
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++KcP7unYv3rNeirZTGtTfoj1BBgWCgAmFiEEGYkvb25zrTvlEVtWimWcx7TWOuYF
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+=YZAU
+-----END PGP PUBLIC KEY BLOCK-----

.version.properties

@@ -0,0 +1,19 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+properties_SPDX-Version="3.0"
+properties_SPDX-ExternalRef="GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git"
+properties_SPDX-FileCopyrightText="2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>"
+properties_SPDX-License-Identifier="EUPL-1.2 OR LicenseRef-CCLA-1.0"
+properties_SPDX-LicenseComment="This file is part of the CISS.hardened.installer framework."
+properties_SPDX-PackageName="CISS.debian.live.builder"
+properties_SPDX-Security-Contact="security@coresecret.eu"
+properties_version="V8.02.512.2025.05.30"
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf

CISS.debian.live.builder.spdx

@@ -0,0 +1,23 @@
+SPDXVersion: SPDX-3.0
+DataLicense: CC0-1.0
+SPDX-DocumentName: CISS.debian.live.builder.SPDX
+SPDX-DocumentNamespace: https://git.coresecret.dev/msw/CISS.debian.live.builder
+Creator: Person: Marc S. Weidner (Centurion Intelligence Consulting Agency)
+Created: 2025-05-07T12:00:00Z
+Package: CISS.debian.live.builder
+PackageName: CISS.debian.live.builder
+PackageVersion: Master V8.02.512.2025.05.30
+PackageSupplier: Organization: Centurion Intelligence Consulting Agency
+PackageDownloadLocation: https://git.coresecret.dev/msw/CISS.debian.live.builder
+PackageHomePage: https://git.coresecret.dev/msw/CISS.debian.live.builder
+PackageLicenseDeclared: EUPL-1.2 OR LicenseRef-CCLA-1.0
+PackageLicenseConcluded: EUPL-1.2
+License: EUPL-1.2
+LicenseID: EUPL-1.2
+LicenseName: European Union Public License 1.2
+LicenseCrossReference: https://joinup.ec.europa.eu/collection/eupl/eupl-text-eupl-12
+License: LicenseRef-CCLA-1.0
+LicenseID: LicenseRef-CCLA-1.0
+LicenseName: Centurion Commercial License Agreement 1.0
+LicenseCrossReference: https://coresecret.eu/imprint/licenses/
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf

LICENSE

@@ -1,89 +1,121 @@
+# SPDX-License-Identifier: EUPL-1.2
+
+EUPL-1.2
+
 EUROPEAN UNION PUBLIC LICENCE v. 1.2
 EUPL © the European Union 2007, 2016
 
-This European Union Public Licence (the ‘EUPL’) applies to the Work (as defined below) which is provided under the
+This European Union Public Licence (the 'EUPL') applies to the Work (as defined below) which is provided under the
 terms of this Licence. Any use of the Work, other than as authorised under this Licence is prohibited (to the extent such
-use is covered by a right of the copyright holder of the Work).
+a use is covered by a right of the copyright holder of the Work).
+
 The Work is provided under the terms of this Licence when the Licensor (as defined below) has placed the following
 notice immediately following the copyright notice for the Work:
+
                           Licensed under the EUPL
+
 or has expressed by any other means his willingness to license under the EUPL.
 
 1.Definitions
+
 In this Licence, the following terms have the following meaning:
-— ‘The Licence’:this Licence.
+
-— ‘The Original Work’:the work or software distributed or communicated by the Licensor under this Licence, available
+— 'The Licence':this Licence.
+
+— 'The Original Work':the work or software distributed or communicated by the Licensor under this Licence, available
 as Source Code and also as Executable Code as the case may be.
-— ‘Derivative Works’:the works or software that could be created by the Licensee, based upon the Original Work or
+
+— 'Derivative Works':the works or software that could be created by the Licensee, based upon the Original Work or
 modifications thereof. This Licence does not define the extent of modification or dependence on the Original Work
 required in order to classify a work as a Derivative Work; this extent is determined by copyright law applicable in
 the country mentioned in Article 15.
-— ‘The Work’:the Original Work or its Derivative Works.
+
-— ‘The Source Code’:the human-readable form of the Work which is the most convenient for people to study and
+— 'The Work':the Original Work or its Derivative Works.
+
+— 'The Source Code':the human-readable form of the Work, which is the most convenient for people to study and
 modify.
-— ‘The Executable Code’:any code which has generally been compiled and which is meant to be interpreted by
+
+— 'The Executable Code':any code, which has generally been compiled and, which is meant to be interpreted by
 a computer as a program.
-— ‘The Licensor’:the natural or legal person that distributes or communicates the Work under the Licence.
+
-— ‘Contributor(s)’:any natural or legal person who modifies the Work under the Licence, or otherwise contributes to
+— 'The Licensor':the natural or legal person that distributes or communicates the Work under the Licence.
+
+— 'Contributor(s)':any natural or legal person who modifies the Work under the Licence, or otherwise contributes to
 the creation of a Derivative Work.
-— ‘The Licensee’ or ‘You’:any natural or legal person who makes any usage of the Work under the terms of the
+
+— 'The Licensee' or 'You':any natural or legal person who makes any usage of the Work under the terms of the
 Licence.
-— ‘Distribution’ or ‘Communication’:any act of selling, giving, lending, renting, distributing, communicating,
+
-transmitting, or otherwise making available, online or offline, copies of the Work or providing access to its essential
+— 'Distribution' or 'Communication':any act of selling, giving, lending, renting, distributing, communicating,
+transmitting, or otherwise making available, online, or offline, copies of the Work or providing access to its essential
 functionalities at the disposal of any other natural or legal person.
 
 2.Scope of the rights granted by the Licence
+
 The Licensor hereby grants You a worldwide, royalty-free, non-exclusive, sublicensable licence to do the following, for
 the duration of copyright vested in the Original Work:
-— use the Work in any circumstance and for all usage,
+
+— use the Work in any circumstances and for all usage,
+
 — reproduce the Work,
-— modify the Work, and make Derivative Works based upon the Work,
+
+— modify the Work and make Derivative Works based upon the Work,
+
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+
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+
 — lend and rent the Work or copies thereof,
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-Those rights can be exercised on any media, supports and formats, whether now known or later invented, as far as the
+
+Those rights can be exercised on any media, supports, and formats, whether now known or later invented, as far as the
 applicable law permits so.
+
 In the countries where moral rights apply, the Licensor waives his right to exercise his moral right to the extent allowed
 by law in order to make effective the licence of the economic rights here above listed.
+
 The Licensor grants to the Licensee royalty-free, non-exclusive usage rights to any patents held by the Licensor, to the
 extent necessary to make use of the rights granted on the Work under this Licence.
 
 3.Communication of the Source Code
-The Licensor may provide the Work either in its Source Code form, or as Executable Code. If the Work is provided as
+
+The Licensor may provide the Work either in its Source Code form or as Executable Code. If the Work is provided as
 Executable Code, the Licensor provides in addition a machine-readable copy of the Source Code of the Work along with
 each copy of the Work that the Licensor distributes or indicates, in a notice following the copyright notice attached to
 the Work, a repository where the Source Code is easily and freely accessible for as long as the Licensor continues to
 distribute or communicate the Work.
 
 4.Limitations on copyright
+
 Nothing in this Licence is intended to deprive the Licensee of the benefits from any exception or limitation to the
-exclusive rights of the rights owners in the Work, of the exhaustion of those rights or of other applicable limitations
+exclusive rights of the rights owners in the Work, to the exhaustion of those rights or of other applicable limitations
 thereto.
 
 5.Obligations of the Licensee
+
 The grant of the rights mentioned above is subject to some restrictions and obligations imposed on the Licensee. Those
 obligations are the following:
 
 Attribution right: The Licensee shall keep intact all copyright, patent or trademarks notices and all notices that refer to
-the Licence and to the disclaimer of warranties. The Licensee must include a copy of such notices and a copy of the
+the Licence and to the disclaimer of warranties. The Licensee must include a copy of such notices, and a copy of the
 Licence with every copy of the Work he/she distributes or communicates. The Licensee must cause any Derivative Work
 to carry prominent notices stating that the Work has been modified and the date of modification.
 
 Copyleft clause: If the Licensee distributes or communicates copies of the Original Works or Derivative Works, this
 Distribution or Communication will be done under the terms of this Licence or of a later version of this Licence unless
-the Original Work is expressly distributed only under this version of the Licence — for example by communicating
+the Original Work is expressly distributed only under this version of the Licence — for example, by communicating
-‘EUPL v. 1.2 only’. The Licensee (becoming Licensor) cannot offer or impose any additional terms or conditions on the
+'EUPL v. 1.2 only'. The Licensee (becoming Licensor) cannot offer or impose any additional terms or conditions on the
 Work or Derivative Work that alter or restrict the terms of the Licence.
 
 Compatibility clause: If the Licensee Distributes or Communicates Derivative Works or copies thereof based upon both
 the Work and another work licensed under a Compatible Licence, this Distribution or Communication can be done
-under the terms of this Compatible Licence. For the sake of this clause, ‘Compatible Licence’ refers to the licences listed
+under the terms of this Compatible Licence. For the sake of this clause, 'Compatible Licence' refers to the licences listed
 in the appendix attached to this Licence. Should the Licensee's obligations under the Compatible Licence conflict with
 his/her obligations under this Licence, the obligations of the Compatible Licence shall prevail.
 
-Provision of Source Code: When distributing or communicating copies of the Work, the Licensee will provide
+The provision of Source Code: When distributing or communicating copies of the Work, the Licensee will provide
 a machine-readable copy of the Source Code or indicate a repository where this Source will be easily and freely available
 for as long as the Licensee continues to distribute or communicate the Work.
 Legal Protection: This Licence does not grant permission to use the trade names, trademarks, service marks, or names
@@ -91,100 +123,134 @@ of the Licensor, except as required for reasonable and customary use in describi
 reproducing the content of the copyright notice.
 
 6.Chain of Authorship
+
 The original Licensor warrants that the copyright in the Original Work granted hereunder is owned by him/her or
 licensed to him/her and that he/she has the power and authority to grant the Licence.
-Each Contributor warrants that the copyright in the modifications he/she brings to the Work are owned by him/her or
+
+Each Contributor warrants that the copyright in the modifications he/she brings to the Work is owned by him/her or
 licensed to him/her and that he/she has the power and authority to grant the Licence.
+
 Each time You accept the Licence, the original Licensor and subsequent Contributors grant You a licence to their contributions
 to the Work, under the terms of this Licence.
 
 7.Disclaimer of Warranty
-The Work is a work in progress, which is continuously improved by numerous Contributors. It is not a finished work
+
-and may therefore contain defects or ‘bugs’ inherent to this type of development.
+The Work is a work in progress, which is continuously improved by numerous Contributors. It is not finished work
-For the above reason, the Work is provided under the Licence on an ‘as is’ basis and without warranties of any kind
+and may therefore contain defects or 'bugs' inherent to this type of development.
+
+For the above reason, the Work is provided under the Licence on an 'as is' basis and without warranties of any kind
 concerning the Work, including without limitation merchantability, fitness for a particular purpose, absence of defects or
 errors, accuracy, non-infringement of intellectual property rights other than copyright as stated in Article 6 of this
 Licence.
+
 This disclaimer of warranty is an essential part of the Licence and a condition for the grant of any rights to the Work.
 
 8.Disclaimer of Liability
+
 Except in the cases of wilful misconduct or damages directly caused to natural persons, the Licensor will in no event be
 liable for any direct or indirect, material or moral, damages of any kind, arising out of the Licence or of the use of the
 Work, including without limitation, damages for loss of goodwill, work stoppage, computer failure or malfunction, loss
-of data or any commercial damage, even if the Licensor has been advised of the possibility of such damage. However,
+of data, or any commercial damage, even if the Licensor has been advised of the possibility of such damage. However,
-the Licensor will be liable under statutory product liability laws as far such laws apply to the Work.
+the Licensor will be liable under statutory product liability laws as far as such laws apply to the Work.
 
 9.Additional agreements
+
 While distributing the Work, You may choose to conclude an additional agreement, defining obligations or services
 consistent with this Licence. However, if accepting obligations, You may act only on your own behalf and on your sole
 responsibility, not on behalf of the original Licensor or any other Contributor, and only if You agree to indemnify,
-defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against such Contributor by
+defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against such a Contributor by
 the fact You have accepted any warranty or additional liability.
 
 10.Acceptance of the Licence
-The provisions of this Licence can be accepted by clicking on an icon ‘I agree’ placed under the bottom of a window
+
+The provisions of this Licence can be accepted by clicking on an icon 'I agree' placed under the bottom of a window
 displaying the text of this Licence or by affirming consent in any other similar way, in accordance with the rules of
 applicable law. Clicking on that icon indicates your clear and irrevocable acceptance of this Licence and all of its terms
 and conditions.
+
 Similarly, you irrevocably accept this Licence and all of its terms and conditions by exercising any rights granted to You
 by Article 2 of this Licence, such as the use of the Work, the creation by You of a Derivative Work or the Distribution
 or Communication by You of the Work or copies thereof.
 
 11.Information to the public
+
 In case of any Distribution or Communication of the Work by means of electronic communication by You (for example,
 by offering to download the Work from a remote location) the distribution channel or media (for example, a website)
-must at least provide to the public the information requested by the applicable law regarding the Licensor, the Licence
+must at least provide to the public the information requested by the applicable law regarding the Licensor, the Licence,
-and the way it may be accessible, concluded, stored and reproduced by the Licensee.
+and the way it may be accessible, concluded, stored, and reproduced by the Licensee.
 
 12.Termination of the Licence
+
 The Licence and the rights granted hereunder will terminate automatically upon any breach by the Licensee of the terms
 of the Licence.
+
 Such a termination will not terminate the licences of any person who has received the Work from the Licensee under
 the Licence, provided such persons remain in full compliance with the Licence.
 
 13.Miscellaneous
+
 Without prejudice of Article 9 above, the Licence represents the complete agreement between the Parties as to the
 Work.
+
 If any provision of the Licence is invalid or unenforceable under applicable law, this will not affect the validity or
 enforceability of the Licence as a whole. Such provision will be construed or reformed so as necessary to make it valid
 and enforceable.
+
 The European Commission may publish other linguistic versions or new versions of this Licence or updated versions of
 the Appendix, so far this is required and reasonable, without reducing the scope of the rights granted by the Licence.
 New versions of the Licence will be published with a unique version number.
+
 All linguistic versions of this Licence, approved by the European Commission, have identical value. Parties can take
 advantage of the linguistic version of their choice.
 
 14.Jurisdiction
+
 Without prejudice to specific agreement between parties,
+
 — any litigation resulting from the interpretation of this License, arising between the European Union institutions,
-bodies, offices or agencies, as a Licensor, and any Licensee, will be subject to the jurisdiction of the Court of Justice
+bodies, offices, or agencies, as a Licensor, and any Licensee, will be subject to the jurisdiction of the Court of Justice
 of the European Union, as laid down in article 272 of the Treaty on the Functioning of the European Union,
-— any litigation arising between other parties and resulting from the interpretation of this License, will be subject to
+
+— any litigation arising between other parties and resulting from the interpretation of this License will be subject to
 the exclusive jurisdiction of the competent court where the Licensor resides or conducts its primary business.
 
 15.Applicable Law
+
 Without prejudice to specific agreement between parties,
+
 — this Licence shall be governed by the law of the European Union Member State where the Licensor has his seat,
-resides or has his registered office,
+resides, or has his registered office
-— this licence shall be governed by Belgian law if the Licensor has no seat, residence or registered office inside
+
+— this licence shall be governed by Belgian law if the Licensor has no seat, residence, or registered office inside
 a European Union Member State.
 
 
                                                          Appendix
 
-‘Compatible Licences’ according to Article 5 EUPL are:
+'Compatible Licences' according to Article 5 EUPL are:
+
 — GNU General Public License (GPL) v. 2, v. 3
+
 — GNU Affero General Public License (AGPL) v. 3
+
 — Open Software License (OSL) v. 2.1, v. 3.0
+
 — Eclipse Public License (EPL) v. 1.0
+
 — CeCILL v. 2.0, v. 2.1
+
 — Mozilla Public Licence (MPL) v. 2
+
 — GNU Lesser General Public Licence (LGPL) v. 2.1, v. 3
+
 — Creative Commons Attribution-ShareAlike v. 3.0 Unported (CC BY-SA 3.0) for works other than software
+
 — European Union Public Licence (EUPL) v. 1.1, v. 1.2
+
 — Québec Free and Open-Source Licence — Reciprocity (LiLiQ-R) or Strong Reciprocity (LiLiQ-R+).
 
 The European Commission may update this Appendix to later versions of the above licences without producing
 a new version of the EUPL, as long as they provide the rights granted in Article 2 of this Licence and protect the
 covered Source Code from exclusive appropriation.
-All other changes or additions to this Appendix require the production of a new EUPL version.
+
+All other changes or additions to this Appendix require the production of a new EUPL version.

README.md

@@ -1,3 +1,404 @@
-# CISS.debian.live.builder
+---
+gitea: none
+include_toc: true
+---
+[![Static Badge](https://badges.coresecret.dev/badge/Release-V8.02.512.2025.05.30-white?style=plastic&logo=linux&logoColor=white&logoSize=auto&label=Release&color=%23FCC624)](https://git.coresecret.dev/msw/CISS.debian.installer)
+ 
+[![Static Badge](https://badges.coresecret.dev/badge/Licence-EUPL1.2-white?style=plastic&logo=europeanunion&logoColor=white&logoSize=auto&label=Licence&color=%23003399)](https://eupl.eu/1.2/en/)  
+[![Static Badge](https://badges.coresecret.dev/badge/opensourceinitiative-Compliant-white?style=plastic&logo=opensourceinitiative&logoColor=white&logoSize=auto&label=OSI&color=%233DA639)](https://opensource.org/license/eupl-1-2)  
+[![Static Badge](https://badges.coresecret.dev/badge/Bash-V5.2.15-white?style=plastic&logo=gnubash&logoColor=white&logoSize=auto&label=Bash&color=%234EAA25)](https://www.gnu.org/software/bash/)  
+[![Static Badge](https://badges.coresecret.dev/badge/shellcheck-passed-white?style=plastic&logo=gnubash&logoColor=white&logoSize=auto&label=shellcheck&color=%234EAA25)](https://shellcheck.net/)  
+[![Static Badge](https://badges.coresecret.dev/badge/shellformat-passed-white?style=plastic&logo=google&logoColor=white&logoSize=auto&label=shellformat&color=%234285F4)](https://github.com/mvdan/sh)  
+[![Static Badge](https://badges.coresecret.dev/badge/Shellstyle-Google-white?style=plastic&logo=google&logoColor=white&logoSize=auto&label=Shellstyle&color=%234285F4)](https://google.github.io/styleguide/shellguide.html)
+ 
+[![Static Badge](https://badges.coresecret.dev/badge/Gitea-1.23.8-white?style=plastic&logo=gitea&logoColor=white&logoSize=auto&label=gitea&color=%23609926)](https://docs.gitea.com/)  
+[![Static Badge](https://badges.coresecret.dev/badge/IntelliJ-2025.1.1.1-white?style=plastic&logo=intellijidea&logoColor=white&logoSize=auto&label=IntelliJ&color=%23000000)](https://www.jetbrains.com/store/?section=personal&billing=yearly)  
+[![Static Badge](https://badges.coresecret.dev/badge/keepassxc-2.7.10-white?style=plastic&logo=keepassxc&logoColor=white&logoSize=auto&label=KeePassXC&color=%236CAC4D)](https://keepassxc.org/)  
+[![Static Badge](https://badges.coresecret.dev/badge/netcup-Netcup-white?style=plastic&logo=netcup&logoColor=white&logoSize=auto&label=powered&color=%23056473)](https://www.netcup.com/de)  
+[![Static Badge](https://badges.coresecret.dev/badge/powered-Centurion-white?style=plastic&logo=europeanunion&logoColor=white&logoSize=auto&label=powered&color=%230F243E)](https://coresecret.eu/)  
+[![Static Badge](https://badges.coresecret.dev/badge/SocialMedia-@coresecret_eu-white?style=plastic&logo=x&logoColor=white&logoSize=auto&label=SocialMedia&color=%23000000)](https://x.com/coresecret_eu)  
+[![Static Badge](https://badges.coresecret.dev/badge/Donation-Donation-white?style=plastic&logo=sepa&logoColor=white&logoSize=auto&label=&color=%230F243E)](https://coresecret.eu/spenden/)  
+[![Static Badge](https://badges.coresecret.dev/badge/bitcoin-Bitcoin-white?style=plastic&logo=bitcoin&logoColor=white&logoSize=auto&label=Donation&color=%23F7931A)](https://coresecret.eu/spenden/)  
+[![Static Badge](https://badges.coresecret.dev/badge/simplex-Simplex-white?style=plastic&logo=simplex&logoColor=white&logoSize=auto&label=Contact&color=%23000000)](https://simplex.chat/)  
 
-Debian Live Build Generator for hardened live environment and CISS Debian Installer
+# 1. CISS.debian.live.builder
+
+**Centurion Intelligence Consulting Agency Information Security Standard**<br>
+*Debian Live Build Generator for hardened live environment and CISS Debian Installer*<br>
+**Master Version**: 8.02<br>
+**Build**: V8.02.512.2025.05.30<br>
+
+This shell wrapper automates the creation of a Debian Bookworm live ISO hardened according to the latest best practices in server
+and service security. It integrates into your build pipeline to deliver an isolated, robust environment suitable for
+cloud deployment or unattended installations via the forthcoming `CISS.debian.installer`.
+
+Check out more:
+* [CenturionNet Services](https://coresecret.eu/cnet/) 
+* [CenturionDNS Resolver](https://dns.eddns.eu/)
+* [CenturionDNS Blocklist](https://dns.eddns.eu/blocklists/centurion_titanium_ultimate.txt) 
+* [CenturionNet Status](https://uptime.coresecret.eu/) 
+* [CenturionMeet](https://talk.e2ee.li/) 
+* [Contact the author](https://coresecret.eu/contact/)
+
+> Please note: All my signing keys are contained in an HSM and the signing environment is air gapped. Next step: move to
+> a room-gapped environment ^^
+
+## 1.1. Immutable Source-of-Truth System
+
+This live ISO establishes a secure, fully deterministic, integrity self-verifying boot environment based entirely on static
+source-code definitions. All configurations, system components, and installation routines are embedded during build time and 
+locked for runtime immutability. This ensures that the live environment functions as a trusted **Source of Truth** — not only 
+for boot-time operations, but for deploying entire systems in a secure and reproducible way.<br>
+
+Once booted, the environment optionally launches a fully scripted installer, via the forthcoming `CISS.debian.installer`,
+yet to deploy, that provisions the target system (the hardware the DVD is running on). The installer pulls no external 
+dependencies besides of the necessary Debian debootstrap and Debian Packages and never exposes the target system in a not 
+secure manner to the internet during installation. It operates strictly from within the verified image content, providing fully 
+secured provisioning. Combined with checksum verification, **activated by default**, at boot and strict firewall defaults, this 
+architecture guarantees that what is executed has not been tampered with and corresponds exactly to the intended source definition.<br>
+
+An even more secure deployment variant — an unattended and headless version — can be built without any active network interface
+or shell-access, also via the forthcoming `CISS.debian.installer`. Such a version performs all verification steps autonomously, 
+provisions the target device from embedded source artifacts, and reboots into a fully encrypted system image. The system then 
+awaits the decryption passphrase input via an embedded Dropbear SSH server (SSH PubKey only) in the initramfs, exposing no ports
+without cryptographic hardened access, while also the `/boot` partition could be encrypted via the built-in support of 
+`grub2 (2.12-1~bpo12+1)`.<br>
+
+This approach provides a fully reproducible, audit-friendly, and tamper-resistant provisioning workflow rooted entirely in 
+source-defined infrastructure logic.<br>
+
+After build and configuration, the following audit reports can be generated:
+
+* **Haveged Audit Report**: Validates entropy daemon health and confirms '/dev/random' seeding performance.
+  Type `chkhvg` at the prompt. See example report: [Haveged Audit Report](https://cendev.eu/marc.weidner/CISS.2025.debian.live.builder/src/branch/master/docs/AUDIT_HAVEGED.md)
+* **Lynis Audit Report**: Outputs a detailed security score and recommendations, confirming a 91%+ hardening baseline.
+  Type `lsadt` at the prompt. See example report: [Lynis Audit Report](https://cendev.eu/marc.weidner/CISS.2025.debian.live.builder/src/branch/master/docs/AUDIT_LYNIS.md)
+* **SSH Audit Report**: Verifies SSH daemon configuration against the latest best-practice cipher, KEX, and MAC recommendations.
+  Type `ssh-audit <IP>:<PORT>`. See example report: [SSH Audit Report](https://cendev.eu/marc.weidner/CISS.2025.debian.live.builder/src/branch/master/docs/AUDIT_SSH.md)
+
+## 1.2. Preview
+
+![CISS.debian.live.builder](/docs/screenshots/CISS.debian.live.builder_preview.jpeg)
+
+## 1.3. Caution. Significant information for those considering using D-I.
+
+**The Debian Installer (d-i) will ALWAYS boot a new system.**<br>
+
+Regardless of whether you start it:
+* via the boot menu of your Live ISO (grub, isolinux) like **CISS.2025.debian.live.builder**,
+* via kexec in the running system,
+* via the debian-installer-launcher package,
+* or even via a graphical installer shortcut.
+
+The following happens in all cases:
+* The installer kernel (/install/vmlinuz) + initrd.gz are started.
+* The existing live system is exited.
+* The memory is overwritten.
+* All running processes – e.g., firewall, hardened SSH access, etc. pp. – cease to exist.
+
+The Debian Installer loads:
+* its own kernel,
+* its own initramfs,
+* its own minimal root filesystem (BusyBox + udeb packages),
+* no SSH access (unless explicitly enabled via preseed)
+* no firewall, AppArmor, logging, etc. pp.,
+* it disables all running network services, even if you were previously in the live system.
+
+This means function status of the **CISS.2025.debian.live.builder** ISO after d-i start:
+* ufw, iptables, nftables ✘ disabled, not loaded,
+* sshd with hardening ✘ stopped (processes gone),
+* the running kernel ✘ replaced,
+* Logging (rsyslog, journald) ✘ not active,
+* preseed control over the network is possible (but without any protection).
+
+# 2. Features & Rationale
+
+Below is a breakdown of each hardening component, with a summary of why each is critical to your security posture.
+
+## 2.1. Kernel Hardening
+
+### 2.1.1. Boot Parameters
+
+* **Description**: Customizes kernel command‑line flags to disable unused features and enable mitigations.
+* **Key Parameters**:
+  * `audit_backlog_limit=8192`: Ensures the audit subsystem can queue up to 8192 events to avoid dropped logs under heavy loads.
+  * `audit=1`: Enables kernel auditing from boot to record system calls and security events.
+  * `cfi=kcfi`: Activates kernel control-flow integrity using kCFI to protect against control-flow hijacking.
+  * `debugfs=off`: Disables debugfs to prevent non-privileged access to kernel internals.
+  * `efi=disable_early_pci_dma`: Stops early PCI DMA under EFI to mitigate DMA-based attacks during boot.
+  * `efi_no_storage_paranoia`: Disables extra EFI storage checks to streamline boot without compromising expected storage integrity.
+  * `hardened_usercopy=1`: Enables stringent checks on copy operations between user and kernel space to prevent buffer overflows.
+  * `ia32_emulation=0`: Turns off 32-bit compatibility modes to reduce attack surface on 64-bit hosts.
+  * `init_on_alloc=1`: Zeroes memory on allocation to prevent leakage of previous data.
+  * `init_on_free=1`: Initializes memory on free to catch use-after-free bugs.
+  * `iommu=force`: Enforces IOMMU for all devices to isolate DMA-capable hardware.
+  * `kfence.sample_interval=100`: Configures the kernel fence memory safety tool to sample every 100 allocations.
+  * `kvm.nx_huge_pages=force`: Enforces non-executable huge pages in KVM to mitigate code injection.
+  * `l1d_flush=on`: Flushes L1 data cache on context switch to mitigate L1D vulnerabilities.
+  * `lockdown=confidentiality`: Puts the kernel in confidentiality lockdown to restrict direct hardware access.
+  * `loglevel=0`: Suppresses non-critical kernel messages to reduce information leakage.
+  * `mce=0`: Disables machine check exceptions to prevent side-channel data leaks from hardware error reporting.
+  * `mitigations=auto,nosmt`: Enables all automatic CPU mitigations and disables SMT to reduce side-channel risks.
+  * `mmio_stale_data=full,nosmt`: Ensures stale MMIO data is fully flushed and disables SMT for added protection.
+  * `oops=panic`: Forces a kernel oops to trigger a panic, preventing the system from running in an inconsistent state.
+  * `page_alloc.shuffle=1`: Randomizes physical page allocation to hinder memory layout prediction attacks.
+  * `page_poison=1`: Fills freed pages with a poison pattern to detect use-after-free.
+  * `panic=-1`: Disables automatic reboot on panic to preserve the system state for forensic analysis.
+  * `pti=on`: Enables page table isolation to mitigate Meltdown attacks.
+  * `random.trust_bootloader=off`: Prevents trusting entropy provided by the bootloader.
+  * `random.trust_cpu=off`: Disables trusting CPU-provided randomness, enforcing external entropy sources.
+  * `randomize_kstack_offset=on`: Randomizes the kernel stack offset on each syscall entry to harden against stack probing.
+  * `randomize_va_space=2`: Enables full address space layout randomization (ASLR) for user space.
+  * `retbleed=auto,nosmt`: Enables automatic RETBLEED mitigations and disables SMT for better side-channel resistance.
+  * `rodata=on`: Marks kernel read-only data sections to prevent runtime modification.
+  * `tsx=off`: Disables Intel TSX extensions to eliminate related speculative execution vulnerabilities.
+  * `vdso32=0`: Disables 32-bit vDSO to prevent unintended cross-mode calls.
+  * `vsyscall=none`: Disables legacy vsyscall support to close a potential attack vector.
+* **Rationale**: Ensures early activation of protections, reducing exposure to CPU vulnerabilities before the system fully boots.
+
+### 2.1.2. CPU Vulnerability Mitigations
+
+* **Description**: Enables all known kernel-level mitigations (Spectre, Meltdown, MDS, L1TF, etc.).
+* **Rationale**: Prevents side‑channel attacks that exploit speculative execution, which remain a high‑risk vector in
+  multi‑tenant cloud environments.
+
+### 2.1.3. Kernel Self-Protection
+
+* **Description**: Activates `CONFIG_DEBUG_RODATA`, `CONFIG_STRICT_MODULE_RWX`, and other self‑protections.
+* **Rationale**: Hardens kernel memory regions against unauthorized writings and enforces stricter module loading policies.
+
+### 2.1.4. Local Kernel Hardening
+
+* **Description**: The wrapper `sysp()`provides a function to apply and audit local kernel hardening rules from `/etc/sysctl.d/99_local.hardened`:
+````bash
+###########################################################################################
+# Globals: Wrapper for loading CISS.2025 hardened Kernel Parameters
+# Arguments:
+#  none
+###########################################################################################
+# shellcheck disable=SC2317
+sysp() {
+  sysctl -p /etc/sysctl.d/99_local.hardened
+  # sleep 1
+  sysctl -a | grep -E 'kernel|vm|net' > /var/log/sysctl_check"$(date +"%Y-%m-%d_%H:%M:%S")".log
+}
+````
+* **Key measures loaded by this file include:**
+  * Disabling module loading `kernel.modules_disabled=1`
+  * Restricting kernel pointers & logs `kernel.kptr_restrict=2`, `kernel.dmesg_restrict=1`, `kernel.printk=3 3 3 3`
+  * Disabling unprivileged BPF and userfaultfd
+  * Disabling kexec and unprivileged user namespaces
+  * Locking down ptrace scope `kernel.yama.ptrace_scope=2`
+  * Protecting filesystem links and FIFOs `fs.protected_*`
+
+**Warning**
+Once applied, some hardening settings cannot be undone via `sysctl` without a reboot, and dynamic module loading remains disabled
+until the next boot. Automatic enforcement at startup is therefore omitted by design—run `sysp()` manually and plan a reboot to 
+apply or revert these controls.
+
+## 2.2. Module Blacklisting
+
+* **Description**: Disables and blacklists non‑essential or insecure kernel modules.
+* **Rationale**: Minimizes attack surface by preventing loads of drivers or modules not required by the live environment.
+
+## 2.3. Network Hardening
+
+* **Description**: Applies `sysctl` settings (e.g., `net.ipv4.conf.all.rp_filter=1`, `arp_ignore`, `arp_announce`) to restrict
+  inbound/outbound traffic behaviors.
+* **Rationale**: Mitigates ARP spoofing, IP spoofing, and reduces the risk of man‑in‑the‑middle on internal networks.
+
+## 2.4. Core Dump & Kernel Hardening
+
+* **Description**: Limits core dump generation paths, enforces `Yama` restrictions, and configures `kernel.kptr_restrict`.
+* **Rationale**: Prevents leakage of sensitive memory contents and reduces information disclosure from unintentional crash
+  dumps.
+
+## 2.5. Entropy Collection Improvements
+
+* **Description**: Installs and configures `haveged`, seeds `/dev/random` early.
+* **Rationale**: Cloud instances frequently suffer low entropy at the start; improving randomness ensures strong cryptographic key
+  generation for SSH and other services.
+
+## 2.6. Permissions & Authentication
+
+* **Description**: Sets strict directory and file permissions, integrates with PAM modules (e.g., `pam_faillock`).
+* **Rationale**: Enforces the principle of least privilege at file‑system level and strengthens authentication policies.
+
+## 2.7. High-Security Baseline (Lynis Audit)
+
+* **Description**: Run a baseline audit via [Lynis](https://cisofy.com/lynis/) after build completion. 
+  The generated live environment consistently achieves a 91%+ score in Lynis security audits.
+* **Rationale**: Provides independent verification of security posture and flags any configuration drifts or missing
+  hardening steps.
+
+## 2.8. SSH Tunnel & Access Security
+
+* **Description**: The SSH tunnel and access are secured through multiple layers of defense:
+  * **Firewall Restriction**: ufw allows connections only from defined jump host or VPN exit node IPs.
+  * **TCP Wrappers**: `/etc/hosts.allow` and `/etc/hosts.deny` enforce an `ALL: ALL` deny policy, permitting only specified hosts.
+  * **One‑Hit Ban**: A custom Fail2Ban rule `/etc/fail2ban/jail.d/centurion-default.conf` immediately bans any host 
+    that touches closed ports. 
+    * Additionally, the `fail2ban` service is hardened as well according to:
+    [Arch Linux Wiki Fail2ban Hardening](https://wiki.archlinux.org/title/fail2ban#Service_hardening) 
+  * **SSH Ultra‑Hardening**: The `/etc/sshd_config` enforces strict cryptographic and connection controls with respect to 
+    [SSH Audit Guide Debian 12](https://www.ssh-audit.com/hardening_guides.html#debian_12):
+    * `RekeyLimit 1G 1h`
+    * `HostKey /etc/ssh/ssh_host_ed25519_key`
+    * `HostKey /etc/ssh/ssh_host_rsa_key (8192-bit RSA)`
+    * `PubkeyAuthentication yes`
+    * `PermitRootLogin prohibit-password`
+    * `PasswordAuthentication no`
+    * `PermitEmptyPasswords no`
+    * `LoginGraceTime 2m`
+    * `MaxAuthTries 3`
+    * `MaxSessions 2`
+    * `MaxStartups 08:64:16`
+    * `PerSourceMaxStartups 4`
+    * `RequiredRSASize 4096`
+    * `Ciphers aes256-gcm@openssh.com`
+    * `KexAlgorithms sntrup761x25519-sha512@openssh.com,sntrup761x25519-sha512,gss-curve25519-sha256-`
+    * `MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com`
+* **Rationale**: These measures ensure that only authorized hosts can establish SSH tunnels, with strict cryptographic and usage 
+  policies enforced. Minimizes brute force, passive sniffing, and reduces credentials' exposure by limiting protocol features to
+  vetted algorithms.
+
+## 2.9. UFW Hardening
+
+* **Description**: Defaults to `deny incoming` and (optionally) `deny outgoing`; automatically opens only whitelisted ports.
+* **Rationale**: Implements a default‑deny firewall, reducing lateral movement and data exfiltration risks immediately after
+  deployment.
+
+## 2.10. Fail2Ban Enhancements
+
+* **Description**:
+  * Bans any connection to a closed port for 24 hours
+  * Automatically ignores designated bastion/jump host subnets
+  * Hardened via `systemd` policy override to limit privileges of the Fail2Ban service itself
+* **Rationale**: Provides proactive defense against port scans and brute‑force attacks, while isolating the ban daemon in a
+  minimal‑privilege context.
+
+## 2.11. NTPsec & Chrony
+
+* **Description**: Installs `chrony`, selects PTB NTPsec servers by default.
+* **Rationale**: Ensures tamper‑resistant time synchronization, which is essential for log integrity, certificate validation,
+  and forensic accuracy.
+
+# 3. Script Features & Rationale
+
+## 3.1. Input Validation & Security
+
+* **Description**: All script arguments are validated using a robust input sanitizer.
+* **Rationale**: Prevents injection attacks and ensures only expected data types and values are processed.
+
+## 3.2. Debug Mode with Detailed Logging
+
+* **Description**: A built-in debug mode outputs clear, timestamped logs including:
+
+  * Script Name and Path of called Function,
+  * Line Number,
+  * Function Name,
+  * Exit Code of the previous Command,
+  * Executed Command.
+* **Rationale**: Simplifies troubleshooting and provides precise error tracing.
+
+## 3.3. Secure Debug Logging
+
+* **Description**: No hardcoded plaintext password fragments or sensitive artifacts appear in debug logs.
+* **Rationale**: Prevents accidental exposure of credentials during troubleshooting.
+
+## 3.4. Secure Password Handling
+
+* **Description**: Password files, if provided, are shredded immediately after being hashed.
+* **Rationale**: Prevents password recovery from temporary files.
+
+## 3.5. Variable Declaration & Validation
+
+* **Description**: All variables are declared and validated before use.
+* **Rationale**: Avoids unintended behavior from unset or improperly set variables.
+
+## 3.6. Pure Bash Implementation
+
+* **Description**: The entire wrapper and all its functions are written in pure Bash, without external dependencies.
+* **Rationale**: Ensures maximum portability and compatibility with standard Debian environments.
+
+## 3.7. Bash Error Handling
+
+* **Description**: The implemented xtrace wrapper `set -x` enforces comprehensive Bash error handling to ensure
+  * robust, 
+  * predictable execution,
+  * and early detection of failures.
+  
+  and delivers full information, which command failed to execute:
+  * Script Name and Path of called Function,
+  * Line Number,
+  * Function Name,
+  * Exit Code of the previous Command,
+  * Executed Command,
+  * Environment Settings,
+  * Argument Counter passed to Script,
+  * Argument String passed to Script.
+
+* The following `set` options are applied at the beginning of the script (see 
+  [Bash Manual, The Set Builtin](https://www.gnu.org/software/bash/manual/bash.html#The-Set-BuiltinGNU)):
+```bash
+set -o errexit   # Exit script when a command exits with non-zero status (same as "set -e").
+set -o errtrace  # Inherit ERR traps in subshells (same as "set -E").
+set -o functrace # Inherit DEBUG and RETURN traps in subshells (same as "set -T").
+set -o nounset   # Exit script on use of an undefined variable (same as "set -u").
+set -o pipefail  # Return the exit status of the last failed command in a pipeline.
+set -o noclobber # Prevent overwriting files via redirection (same as "set -C").
+```
+* **Rationale**: These options enforce strict error checking and handling, reducing silent failures and ensuring 
+predictable script behavior.
+
+# 4. Prerequisites
+
+* **Host**: Debian Bookworm or newer with `live-build` package installed.
+* **Privileges**: Root or sudo access to execute `ciss_live_builder.sh` and related scripts.
+* **Network**: Outbound access to Debian repositories and PTB NTPsec pool.
+
+# 5. Installation & Usage
+
+1. Clone the repository:
+
+   ```bash
+   git clone https://cendev.eu/marc.weidner/CISS.2025.debian.live.builder.git
+   cd CISS.2025.debian.live.builder
+   ```
+2. Run the config builder and the integrated `lb build` command (example):
+
+   ```bash
+   ./ciss_live_builder.sh --architecture amd64 \
+                          --build-directory /opt/livebuild \
+                          --change-splash hexagon \
+                          --control 384 \
+                          --debug \
+                          --dhcp-centurion \
+                          --jump-host 10.0.0.128 [c0de:4711:0815:4242::1] [2abc:4711:0815:4242::1]/64 \
+                          --provider-netcup-ipv6 [c0de:4711:0815:4242::ffff] \
+                          --renice-priority "-19" \
+                          --reionice-priority 1 2 \
+                          --root-password-file /opt/gitea/CISS.2025.debian.live.builder/password.txt \
+                          --ssh-port 4242 \
+                          --ssh-pubkey /opt/gitea/CISS.2025.debian.live.builder
+   ```
+3. Locate your ISO in the `--build-directory`.
+4. Boot from the ISO and login to the live image via the console, or the multi-layer secured coresecret SSH tunnel.
+5. Type `sysp` for the final kernel hardening features.
+6. Check the boot log with `jboot` and via `ssf` that all services are up.
+7. Finally, audit your environment with `lsadt` for a comprehensive Lynis audit.
+8. Type `celp` for some shortcuts.
+
+# 6. Licensing & Compliance
+
+This repository is fully SPDX-compliant. All source files include appropriate SPDX license identifiers and headers to ensure
+clear and unambiguous licensing. You can verify compliance by reviewing the top of each file, which follows the SPDX
+standard for license expressions and metadata.
+
+# 7. Disclaimer
+
+This README is provided "as‑is" without any warranty. Review your organization's policies before deploying to production.
+
+---
+**[no tracking | no logging | no advertising | no profiling | no bullshit](https://coresecret.eu/)**
+<!-- vim: set number et ts=2 sw=2 sts=2 ai tw=128 ft=markdown -->

SECURITY.md

@@ -0,0 +1,23 @@
+# Security Policy
+
+## Reporting vulnerabilities
+
+Please send your vulnerability reports to `security@coresecret.eu`
+
+To make sure that your report reaches me, please:
+
+Include the words `CISS.debian.live.builder` and `vulnerability` to the subject line as well as a short description of the vulnerability.
+
+Make sure that the message body contains a clear description of the vulnerability.
+
+If you have not received a reply to your email within seven days, please make sure to follow up with me again at `security@coresecret.eu`
+
+Once again, make sure that the word `vulnerability` is in the subject line.
+
+My security policy is available at:
+
+[https://coresecret.eu/security-policy/](https://coresecret.eu/security-policy/)
+
+---
+**[no tracking | no logging | no advertising | no profiling | no bullshit](https://coresecret.eu/)**
+<!-- vim: set number et ts=2 sw=2 sts=2 ai tw=128 ft=markdown -->

ciss_live_builder.sh

@@ -0,0 +1,188 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+### Contributions so far see ./docs/CREDITS.md
+
+### WHY BASH?
+# Ease of installation.
+# No compiling or installing gems, CPAN modules, pip packages, etc.
+# Simple to use and read. Clear syntax and straightforward output interpretation.
+# Built-in power.
+# Pattern matching, line processing, and regular expression support are available natively,
+# no external binaries required.
+# Cross-platform consistency.
+# '/bin/bash' is the default shell on most Linux distributions, ensuring scripts run unmodified across systems.
+# macOS compatibility.
+# Since macOS Catalina (10.15), the default login shell has been zsh, but bash remains available at '/bin/bash'.
+# Windows support.
+# You can use bash via WSL, MSYS2, or Cygwin on Windows systems.
+
+### Preliminary checks
+[ -z "${BASH_VERSINFO[0]}" ] && {
+  . ./var/global.var.sh; printf "\e[91m❌ Please make sure you are using 'bash'! Bye... \e[0m\n" >&2; exit "${ERR_UNSPPTBASH}"; }
+[[ ${EUID} -ne 0 ]] && {
+  . ./var/global.var.sh; printf "\e[91m❌ Please make sure you are 'root'! Bye... \e[0m\n" >&2; exit "${ERR_NOT_USER_0}"; }
+[[ $(kill -l | grep -c SIG) -eq 0 ]] && {
+  . ./var/global.var.sh; printf "\e[91m❌ Please make sure you are calling the script without leading 'sh'! Bye... \e[0m\n" >&2; exit "${ERR_UNSPPTBASH}"; }
+[[ ${BASH_VERSINFO[0]} -lt 5 ]] && {
+  . ./var/global.var.sh; printf "\e[91m❌ Minimum requirement is bash 5.1. You are using '%s'! Bye... \e[0m\n" "${BASH_VERSION}" >&2; exit "${ERR_UNSPPTBASH}"; }
+[[ ${BASH_VERSINFO[0]} -le 5 ]] && [[ ${BASH_VERSINFO[1]} -le 1 ]] && {
+  . ./var/global.var.sh; printf "\e[91m❌ Minimum requirement is bash 5.1. You are using '%s'! Bye... \e[0m\n" "${BASH_VERSION}" >&2; exit "${ERR_UNSPPTBASH}"; }
+
+declare -gr VERSION="Master V8.02.512.2025.05.30"
+declare -gr CONTACT="security@coresecret.eu"
+
+### VERY EARLY CHECK FOR CONTACT, USAGE, AND VERSION STRING
+declare arg
+if [[ ${#} -eq 0 ]]; then . ./lib/lib_usage.sh; usage; exit 1; fi
+for arg in "$@"; do case "${arg,,}" in -c|--contact) printf "\e[95mCISS.debian.live.builder Contact: %s\e[0m\n" "${CONTACT}"; exit 0;; esac; done
+for arg in "$@"; do case "${arg,,}" in -h|--help) . ./lib/lib_usage.sh; usage; exit 0;; esac; done
+for arg in "$@"; do case "${arg,,}" in -v|--version) printf "\e[95mCISS.debian.live.builder Version: %s\e[0m\n" "${VERSION}"; exit 0;; esac; done
+unset arg
+
+### VERY EARLY CHECK FOR XTRACE DEBUGGING
+if [[ $* == *" --debug "* ]]; then
+  . ./lib/lib_debug.sh
+  debugger "${@}"
+else
+  declare -grx EARLY_DEBUG=false
+fi
+
+### Advisory Lock
+exec 127>/var/lock/ciss_live_builder.lock || {
+  . ./var/global.var.sh
+  printf "\e[91m❌ Cannot open lockfile for writing! Bye... \e[0m\n" >&2
+  exit "${ERR_FLOCK_WRTG}"
+}
+
+if ! flock -x -n 127; then
+  . ./var/global.var.sh
+  printf "\e[91m❌ Another instance is running! Bye...\e[0m\n" >&2
+  exit "${ERR_FLOCK_COLL}"
+fi
+
+### Checking required packages
+. ./lib/lib_check_pkgs.sh
+check_pkgs
+
+### Dialog Output for Initialization
+. ./lib/lib_boot_screen.sh && boot_screen
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nUpdating variables ... \nXXX\n05\n" >&3
+. ./var/global.var.sh
+. ./var/colors.var.sh
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nEnabling Bash Error Handling ... \nXXX\n15\n" >&3
+### For all options see https://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
+set -o errexit   # Exit script when a command exits with non-zero status, the same as "set -e".
+set -o errtrace  # Any traps on ERR are inherited in a subshell environment, the same as "set -E".
+set -o functrace # Any traps on DEBUG and RETURN are inherited in a subshell environment, the same as "set -T".
+set -o nounset   # Exit script on use of an undefined variable, the same as "set -u".
+set -o pipefail  # Makes pipelines return the exit status of the last command in the pipe that failed.
+set -o noclobber # Prevent overwriting, the same as "set -C".
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nAdditional initialization ... \nXXX\n25\n" >&3
+### Initialization
+declare -gr ARGUMENTS_COUNT="$#"
+declare -gr ARG_STR_ORG_INPUT="$*"
+declare -ar ARG_ARY_ORG_INPUT=("$@")
+# shellcheck disable=SC2155
+declare -gr SCRIPT_FULLPATH="$(readlink -f "${BASH_SOURCE[0]:-$0}")"
+# shellcheck disable=SC2155
+declare -grx WORKDIR="$(dirname "${SCRIPT_FULLPATH}")"
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nSourcing Libraries ... \nXXX\n50\n" >&3
+. ./lib/lib_arg_parser.sh
+. ./lib/lib_arg_priority_check.sh
+. ./lib/lib_cdi.sh
+. ./lib/lib_change_splash.sh
+. ./lib/lib_check_dhcp.sh
+. ./lib/lib_check_hooks.sh
+. ./lib/lib_check_kernel.sh
+. ./lib/lib_check_provider.sh
+. ./lib/lib_check_stats.sh
+. ./lib/lib_check_var.sh
+. ./lib/lib_clean_screen.sh
+. ./lib/lib_clean_up.sh
+. ./lib/lib_copy_integrity.sh
+. ./lib/lib_hardening_root_pw.sh
+. ./lib/lib_hardening_ssh.sh
+. ./lib/lib_hardening_ultra.sh
+. ./lib/lib_helper_ip.sh
+. ./lib/lib_lb_build_start.sh
+. ./lib/lib_lb_config_start.sh
+. ./lib/lib_lb_config_write.sh
+. ./lib/lib_provider_netcup.sh
+. ./lib/lib_run_analysis.sh
+. ./lib/lib_sanitizer.sh
+. ./lib/lib_trap_on_err.sh
+. ./lib/lib_trap_on_exit.sh
+. ./lib/lib_usage.sh
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nActivate traps ... \nXXX\n55\n" >&3
+### Following the CISS Bash naming and ordering scheme
+trap 'trap_on_exit "$?"' EXIT
+trap 'trap_on_err "$?" "${BASH_SOURCE[0]}" "${LINENO}" "${FUNCNAME[0]:-main}" "${BASH_COMMAND}"' ERR
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nSanitizing Arguments ... \nXXX\n70\n" >&3
+arg_check "$@"
+declare -ar ARG_ARY_SANITIZED=("$@")
+declare -gr ARG_STR_SANITIZED="${ARG_ARY_SANITIZED[*]}"
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nParsing Arguments ... \nXXX\n90\n" >&3
+arg_parser "$@"
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nFinal checks ... \nXXX\n95\n" >&3
+clean_ip
+
+### Updating Status of Dialog Gauge Bar
+printf "XXX\nInitialization completed ... \nXXX\n100\n" >&3
+sleep 1
+
+boot_screen_cleaner
+
+### MAIN Program
+arg_priority_check
+check_stats
+check_provider
+check_kernel
+check_hooks
+hardening_ssh
+lb_config_start
+lb_config_write
+
+cd "${WORKDIR}"
+hardening_ultra
+hardening_root_pw
+change_splash
+check_dhcp
+cdi
+provider_netcup
+
+### Start the build process
+set +o errtrace
+lb_build_start
+
+set -o errtrace
+run_analysis
+copy_db
+declare -g handler_success=true
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/bootloaders/grub-efi/grub.cfg

@@ -0,0 +1,46 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+source /boot/grub/config.cfg
+
+GRUB_DEFAULT=0
+GRUB_TIMEOUT=16
+GRUB_DISTRIBUTOR="CISS.debian.live.builder"
+
+# Live boot
+@LINUX_LIVE@
+
+### CISS.2025 BOB
+#MUST_BE_REPLACED
+### CISS.2025 EOB
+
+submenu 'CISS CoreSecret Legacy DI ...' --hotkey=c {
+  source /boot/grub/theme.cfg
+  menuentry "CISS CoreSecret Legacy DI" --hotkey=s {
+    linux @KERNEL_GI@ @APPEND_GI@
+    initrd @INITRD_GI@
+    }
+  }
+
+submenu 'Utilities ...' --hotkey=u {
+  source /boot/grub/theme.cfg
+  # Memtest (if any)
+  if @ENABLE_MEMTEST@; then
+    source /boot/grub/memtest.cfg
+	fi
+	# Firmware setup (UEFI)
+  if [ "${grub_platform}" = "efi" ]; then
+    menuentry "UEFI Firmware Settings" --hotkey=e {
+    fwsetup
+    }
+  fi
+  }
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/bootloaders/grub-pc/grub.cfg

@@ -0,0 +1,46 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+source /boot/grub/config.cfg
+
+GRUB_DEFAULT=0
+GRUB_TIMEOUT=16
+GRUB_DISTRIBUTOR="CISS.debian.live.builder"
+
+# Live boot
+@LINUX_LIVE@
+
+### CISS.2025 BOB
+#MUST_BE_REPLACED
+### CISS.2025 EOB
+
+submenu 'CISS CoreSecret Legacy DI ...' --hotkey=c {
+  source /boot/grub/theme.cfg
+  menuentry "CISS CoreSecret Legacy DI" --hotkey=s {
+    linux @KERNEL_GI@ @APPEND_GI@
+    initrd @INITRD_GI@
+    }
+  }
+
+submenu 'Utilities ...' --hotkey=u {
+  source /boot/grub/theme.cfg
+  # Memtest (if any)
+  if @ENABLE_MEMTEST@; then
+    source /boot/grub/memtest.cfg
+  fi
+  # Firmware setup (UEFI)
+  if [ "${grub_platform}" = "efi" ]; then
+    menuentry "UEFI Firmware Settings" --hotkey=e {
+    fwsetup
+    }
+  fi
+  }
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0000_generate_backup_dir.chroot

@@ -0,0 +1,27 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+mkdir -p /root/.ciss/dlb/backup
+chmod 0700 /root/.ciss/dlb/backup
+
+mkdir -p /root/git
+chmod 0700 /root/git
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0001_initramfs_modules.chroot

@@ -0,0 +1,294 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+#######################################
+# Get all NIC Driver of the current Host-machine
+# Arguments:
+#  None
+#######################################
+grep_nic_driver_modules() {
+  declare _mods
+  # Gather all Driver and sort unique
+  readarray -t _mods < <(
+    lspci -k \
+      | grep -A2 -i ethernet \
+      | grep 'Kernel driver in use' \
+      | awk '{print $5}' \
+      | sort -u
+  )
+
+  declare nic_module
+  declare nic_modules
+  if [[ "${#_mods[@]}" -eq 1 ]]; then
+    nic_module="${_mods[0]}"
+    echo "${nic_module}"
+  else
+    nic_modules="${_mods[*]}"
+    echo "${nic_modules}"
+  fi
+}
+
+# shellcheck disable=SC2155
+declare nic_driver="$(grep_nic_driver_modules)"
+cat << EOF >| /etc/initramfs-tools/modules
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# List of modules that you want to include in your initramfs.
+# They will be loaded at boot time in the order below.
+#
+# Syntax:  module_name [args ...]
+#
+# You must run update-initramfs(8) to effect this change.
+#
+# Examples:
+#
+# raid1
+# sd_mod
+
+### QEMU Bochs-compatible virtual machine support
+bochs
+
+### Device-mapper core module (required for all dm_* features)
+dm_mod
+
+### Device-mapper integrity target (provides integrity checking)
+dm-integrity
+
+### Device-mapper crypt target (provides disk encryption)
+dm-crypt
+
+### Generic AES block cipher implementation (used by dm-crypt)
+aes_generic
+
+### Generic SHA-256 hashing algorithm (used by various crypto and integrity targets)
+sha256_generic
+
+### Generic CRC32C checksum implementation (used by btrfs and other filesystems)
+crc32c_generic
+
+### Main btrfs filesystem module
+btrfs
+
+### Zstandard compression support for btrfs
+zstd_compress
+
+### XOR parity implementation for RAID functionality
+xor
+
+### RAID6 parity generation module
+raid6_pq
+
+### Combined RAID4/5/6 support module
+raid456
+
+### Network Driver Host-machine
+"${nic_driver}"
+
+EOF
+
+cat << 'EOF' >| /etc/initramfs-tools/update-initramfs.conf
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+#
+# The Configuration file for update-initramfs(8)
+#
+
+#
+# update_initramfs [ yes | all | no ]
+#
+# Default is yes
+# If set to all update-initramfs will update all initramfs
+# If set to no disables any update to initramfs besides kernel upgrade
+
+update_initramfs=yes
+
+#
+# backup_initramfs [ yes | no ]
+#
+# Default is no
+# If set to no leaves no .bak backup files.
+
+backup_initramfs=no
+
+EOF
+
+cat << 'EOF' >| /etc/initramfs-tools/initramfs.conf
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+#
+# initramfs.conf
+# Configuration file for mkinitramfs(8). See initramfs.conf(5).
+#
+# Note that configuration options from this file can be overridden
+# by config files in the /etc/initramfs-tools/conf.d directory.
+
+#
+# MODULES: [ most | netboot | dep | list ]
+#
+# most - Add most filesystem and all hard-drive drivers.
+#
+# dep - Try and guess that module to load.
+#
+# netboot - Add the base modules, network modules, but skip block devices.
+#
+# list - Only include modules from the 'additional modules' list
+#
+
+MODULES=most
+
+#
+# BUSYBOX: [ y | n | auto ]
+#
+# Use busybox shell and utilities.  If set to n, klibc utilities will be used.
+# If set to auto (or unset), busybox will be used if installed and klibc will
+# be used otherwise.
+#
+
+BUSYBOX=auto
+
+#
+# KEYMAP: [ y | n ]
+#
+# Load a keymap during the initramfs stage.
+#
+
+KEYMAP=n
+
+#
+# COMPRESS: [ gzip | bzip2 | lz4 | lzma | lzop | xz | zstd ]
+#
+
+COMPRESS=zstd
+
+#
+# COMPRESSLEVEL: ...
+#
+# Set a compression level for the compressor.
+# Defaults vary by compressor.
+#
+# Valid values are:
+# 1–9 for gzip|bzip2|lzma|lzop
+# 0–9 for  lz4|xz
+# 0–19 for zstd
+# COMPRESSLEVEL=3
+
+#
+# DEVICE: ...
+#
+# Specify a specific network interface, like eth0
+# Overridden by optional ip= or BOOTIF= bootarg
+#
+
+DEVICE=
+
+#
+# NFSROOT: [ auto | HOST:MOUNT ]
+#
+
+NFSROOT=auto
+
+#
+# RUNSIZE: ...
+#
+# The size of the /run tmpfs mount point, like 256M or 10%
+# Overridden by optional initramfs.runsize= bootarg
+#
+
+RUNSIZE=10%
+
+#
+# FSTYPE: ...
+#
+# The filesystem type(s) to support, or "auto" to use the current root
+# filesystem type
+#
+
+FSTYPE=auto
+
+EOF
+
+cat << 'EOF' >> /etc/initramfs-tools/hooks/ciss_debian_live_builder
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+set -e
+
+PREREQ=""
+prereqs() { echo "$PREREQ"; }
+case $1 in
+  prereqs) prereqs; exit 0 ;;
+esac
+
+. /usr/share/initramfs-tools/hook-functions
+
+mkdir -p "${DESTDIR}/bin" "${DESTDIR}/usr/bin" "${DESTDIR}/usr/local/bin"
+
+# Include Bash
+copy_exec /usr/bin/bash /usr/bin
+
+# Include lsblk (block device information tool)
+copy_exec /usr/bin/lsblk /usr/bin
+
+# Include udevadm (udev management tool)
+copy_exec /usr/bin/udevadm /usr/bin
+EOF
+
+chmod 0755 /etc/initramfs-tools/hooks/ciss_debian_live_builder
+
+### Regenerate the initramfs for the live system kernel
+update-initramfs -u -k all
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0002_verify_checksums.chroot

@@ -0,0 +1,144 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+target="/usr/lib/live/boot/0030-verify-checksums"
+src="$(mktemp)"
+
+if [[ ! -d /usr/lib/live/boot ]]; then
+  mkdir -p /usr/lib/live/boot
+fi
+
+cat << 'EOF' >| "${src}"
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+### Changed version of https://salsa.debian.org/live-team/live-boot 'components/0030-verify-checksums'
+### In case of successful verification of the offered checksums, proceed with booting, else panic.
+
+### Inside 0002_verify_checksums.chroot ###
+
+#######################################
+# Live build ISO with the modified checksum verification script for continuing the boot process.
+# Globals:
+#   LIVE_BOOT_CMDLINE
+#   LIVE_VERIFY_CHECKSUMS
+#   LIVE_VERIFY_CHECKSUMS_DIGESTS
+#   _CHECKSUM
+#   _CHECKSUMS
+#   _DIGEST
+#   _MOUNTPOINT
+#   _PARAMETER
+#   _RETURN
+#   _TTY
+# Arguments:
+#   $1: ${_PARAMETER}
+# Returns:
+#   0 : Successful Verification
+#######################################
+Verify_checksums() {
+  for _PARAMETER in ${LIVE_BOOT_CMDLINE}; do
+    case "${_PARAMETER}" in
+      live-boot.verify-checksums=* | verify-checksums=*)
+        LIVE_VERIFY_CHECKSUMS="true"
+        LIVE_VERIFY_CHECKSUMS_DIGESTS="${_PARAMETER#*verify-checksums=}"
+        ;;
+
+      live-boot.verify-checksums | verify-checksums)
+        LIVE_VERIFY_CHECKSUMS="true"
+        ;;
+    esac
+  done
+
+  case "${LIVE_VERIFY_CHECKSUMS}" in
+    true) ;;
+
+    *)
+      return 0
+      ;;
+  esac
+
+  _MOUNTPOINT="${1}"
+
+  LIVE_VERIFY_CHECKSUMS_DIGESTS="${LIVE_VERIFY_CHECKSUMS_DIGESTS:-sha512 sha384 sha256}"
+  _TTY="/dev/tty8"
+
+  log_begin_msg "Verifying checksums"
+
+  # shellcheck disable=SC2164
+  cd "${_MOUNTPOINT}"
+
+  for _DIGEST in $(echo "${LIVE_VERIFY_CHECKSUMS_DIGESTS}" | sed -e 's|,| |g'); do
+    # shellcheck disable=SC2060
+    _CHECKSUMS="$(echo "${_DIGEST}" | tr [a-z] [A-Z])SUMS ${_DIGEST}sum.txt"
+
+    for _CHECKSUM in ${_CHECKSUMS}; do
+      if [ -e "${_CHECKSUM}" ]; then
+        echo "Found ${_CHECKSUM}..." > "${_TTY}"
+
+        if [ -e "/bin/${_DIGEST}sum" ]; then
+          echo "Checking ${_CHECKSUM}..." > "${_TTY}"
+
+          # Verify checksums
+          grep -v '^#' "${_CHECKSUM}" | /bin/"${_DIGEST}"sum -c > "${_TTY}"
+          _RETURN="${?}"
+
+          # Stop after the first verification
+          # break 2
+        else
+          echo "Not found /bin/${_DIGEST}sum..." > "${_TTY}"
+        fi
+      fi
+    done
+  done
+
+  log_end_msg
+
+  case "${_RETURN}" in
+    0)
+      log_success_msg "Verification sha512 sha384 sha256 successful, continuing booting in 10 seconds."
+      sleep 10
+      return 0
+      ;;
+
+    *)
+      panic "Verification failed, $(basename ${_TTY}) for more information."
+      ;;
+  esac
+}
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
+EOF
+
+# Copy and make executable
+install -Dm755 "${src}" "${target}"
+
+rm -f "${src}"
+
+unset target src
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0050_activate_root.chroot

@@ -0,0 +1,53 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+if [[ ! -f /root/.pwd ]]; then
+  printf "\e[93m++++ ++++ ++++ ++++ ++++ ++++ ++ ❌ /root/.pwd NOT found. \e[0m\n"
+  # sleep 1
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ❌ Exiting Hook ... \e[0m\n"
+  # sleep 1
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' done. Nothing changed. \e[0m\n" "${0}"
+  exit 0
+fi
+
+cd /root
+
+cp /etc/shadow /root/.ciss/dlb/backup/shadow.bak."$(date +%F_%T)"
+chmod 600 /root/.ciss/dlb/backup/shadow.bak.*
+
+declare hashed_pwd
+declare safe_hashed_pwd
+IFS= read -r hashed_pwd < /root/.pwd
+
+safe_hashed_pwd=$(printf '%s' "${hashed_pwd}" | sed 's/[\/&]/\\&/g')
+sed -i "s|^root:[^:]*:\(.*\)|root:${safe_hashed_pwd}:\1|" /etc/shadow
+sed -i "s|^user:[^:]*:\(.*\)|user:${safe_hashed_pwd}:\1|" /etc/shadow
+unset hashed_pwd safe_hashed_pwd
+
+cat /etc/shadow
+# sleep 1
+
+if shred -vfzu -n 5 /root/.pwd; then
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Password file /root/.pwd: -vfzu -n 5 >> done. \e[0m\n"
+else
+  printf "\e[91m++++ ++++ ++++ ++++ ++++ ++++ ++ ❌ Password file /root/.pwd: -vfzu -n 5 >> NOT successful. \e[0m\n" >&2
+fi
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0080_keyboard_layout.chroot

@@ -0,0 +1,31 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cat << 'EOF' >| /etc/default/keyboard
+XKBMODEL="pc105"
+XKBLAYOUT="de"
+XKBVARIANT=""
+XKBOPTIONS=""
+BACKSPACE="guess"
+EOF
+
+dpkg-reconfigure -f noninteractive keyboard-configuration
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0090_haveged.chroot

@@ -0,0 +1,42 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+apt-get update -y
+apt-get install --no-install-recommends haveged -y
+
+cd /root
+cat << 'EOF' >| /etc/default/haveged
+# Configuration file for haveged
+
+# Options to pass to haveged:
+DAEMON_ARGS="-w 2048 -v 1"
+EOF
+
+#mkdir -p /etc/systemd/system/haveged.service.d
+#cat << 'EOF' >| /etc/systemd/system/haveged.service.d/override.conf
+#[Service]
+#NoNewPrivileges=yes
+#ReadWritePaths=/dev/random /dev/urandom
+#AmbientCapabilities=
+#User=haveged
+#Group=nogroup
+#EOF
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0120_set_hostname.chroot

@@ -0,0 +1,34 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+mv /etc/hostname /root/.ciss/dlb/backup/hostname.bak
+mv /etc/mailname /root/.ciss/dlb/backup/mailname.bak
+
+cat << 'EOF' >| /etc/hostname
+live.local
+
+EOF
+
+cat << 'EOF' >| /etc/mailname
+localhost.local
+
+EOF
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0130_machineid.chroot

@@ -0,0 +1,40 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root
+if [[ -f /var/lib/dbus/machine-id ]]; then
+  rm /var/lib/dbus/machine-id
+fi
+
+cat << 'EOF' >| /var/lib/dbus/machine-id
+b08dfa6083e7567a1921a715000001fb
+EOF
+chmod 644 /var/lib/dbus/machine-id
+
+if [[ -f /etc/machine-id ]]; then
+  rm /etc/machine-id
+fi
+
+cat << 'EOF' >| /etc/machine-id
+b08dfa6083e7567a1921a715000001fb
+EOF
+chmod 644 /etc/machine-id
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0400_eza_install.chroot

@@ -0,0 +1,162 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root
+
+repo="ryanoasis/nerd-fonts"
+latest_release=$(curl -s "https://api.github.com/repos/${repo}/releases/latest" | jq -r .tag_name)
+download_url="https://github.com/${repo}/releases/download/${latest_release}/Hack.zip"
+
+wget -qO- https://raw.githubusercontent.com/eza-community/eza/main/deb.asc | gpg --dearmor -o /etc/apt/keyrings/gierens.gpg
+echo "deb [signed-by=/etc/apt/keyrings/gierens.gpg] http://deb.gierens.de stable main" | tee /etc/apt/sources.list.d/gierens.list
+chmod 644 /etc/apt/keyrings/gierens.gpg /etc/apt/sources.list.d/gierens.list
+
+apt-get update -y
+apt-get install -y eza
+
+git clone https://github.com/eza-community/eza-themes.git
+mkdir -p /root/.config/eza
+
+cat << 'EOF' >| "/root/eza-themes/themes/centurion.yml"
+colourful: true
+
+filekinds:
+  normal: {foreground: Default}
+  directory: {foreground: Purple, is_bold: true}
+  symlink: {foreground: Cyan}
+  pipe: {foreground: Yellow}
+  block_device: {foreground: Yellow, is_bold: true}
+  char_device: {foreground: Yellow, is_bold: true}
+  socket: {foreground: Red, is_bold: true}
+  special: {foreground: Yellow}
+  executable: {foreground: Green, is_bold: true}
+  mount_point: {foreground: Purple, is_bold: true, is_underlined: true}
+
+perms:
+  user_read: {foreground: Yellow, is_bold: true}
+  user_write: {foreground: Red, is_bold: true}
+  user_execute_file: {foreground: Green, is_bold: true, is_underlined: true}
+  user_execute_other: {foreground: Green, is_bold: true}
+  group_read: {foreground: Yellow}
+  group_write: {foreground: Red}
+  group_execute: {foreground: Green}
+  other_read: {foreground: Yellow}
+  other_write: {foreground: Red}
+  other_execute: {foreground: Green}
+  special_user_file: {foreground: Purple}
+  special_other: {foreground: Purple}
+  attribute: {foreground: Default}
+
+size:
+  major: {foreground: Green, is_bold: true}
+  minor: {foreground: Green}
+  number_byte: {foreground: Green, is_bold: true}
+  number_kilo: {foreground: Green, is_bold: true}
+  number_mega: {foreground: Green, is_bold: true}
+  number_giga: {foreground: Green, is_bold: true}
+  number_huge: {foreground: Green, is_bold: true}
+  unit_byte: {foreground: Green}
+  unit_kilo: {foreground: Green}
+  unit_mega: {foreground: Green}
+  unit_giga: {foreground: Green}
+  unit_huge: {foreground: Green}
+
+users:
+  user_you: {foreground: Yellow, is_bold: true}
+  user_root: {foreground: Default}
+  user_other: {foreground: Default}
+  group_yours: {foreground: Yellow, is_bold: true}
+  group_other: {foreground: Default}
+  group_root: {foreground: Default}
+
+links:
+  normal: {foreground: Red, is_bold: true}
+  multi_link_file: {foreground: Red, background: Yellow}
+
+git:
+  new: {foreground: Green}
+  modified: {foreground: Blue}
+  deleted: {foreground: Red}
+  renamed: {foreground: Yellow}
+  typechange: {foreground: Purple}
+  ignored: {foreground: Default, is_dimmed: true}
+  conflicted: {foreground: Red}
+
+git_repo:
+  branch_main: {foreground: Green}
+  branch_other: {foreground: Yellow}
+  git_clean: {foreground: Green}
+  git_dirty: {foreground: Yellow}
+
+security_context:
+  colon: {foreground: Default, is_dimmed: true}
+  user: {foreground: Blue}
+  role: {foreground: Green}
+  typ: {foreground: Yellow}
+  range: {foreground: Cyan}
+
+file_type:
+  image: {foreground: Purple}
+  video: {foreground: Purple, is_bold: true}
+  music: {foreground: Cyan}
+  lossless: {foreground: Cyan, is_bold: true}
+  crypto: {foreground: Green, is_bold: true}
+  document: {foreground: Green}
+  compressed: {foreground: Red}
+  temp: {foreground: White}
+  compiled: {foreground: Yellow}
+  build: {foreground: Yellow, is_bold: true, is_underlined: true}
+  source: {foreground: Yellow, is_bold: true}
+
+punctuation: {foreground: DarkGray, is_bold: true}
+date: {foreground: Cyan}
+inode: {foreground: Purple}
+blocks: {foreground: Cyan}
+header: {foreground: White, is_bold: true, is_underlined: true}
+octal: {foreground: Purple}
+flags: {foreground: Default}
+
+symlink_path: {foreground: Cyan}
+control_char: {foreground: Red}
+broken_symlink: {foreground: Red}
+broken_path_overlay: {foreground: Default, is_underlined: true}
+
+filenames:
+  # Custom filename-based overrides
+  # Cargo.toml: {icon: {glyph: 🦀}}
+
+extensions:
+  # Custom extension-based overrides
+  # rs: {filename: {foreground: Red}, icon: {glyph: 🦀}}
+EOF
+
+chmod 0644 "/root/eza-themes/themes/centurion.yml"
+ln -sf "/root/eza-themes/themes/centurion.yml" /root/.config/eza/theme.yml
+
+mkdir -p /tmp/nerd
+mkdir -p /root/.local/share/fonts
+wget --no-clobber --https-only --secure-protocol=TLSv1_3 -P /tmp/nerd "${download_url}"
+unzip /tmp/nerd/Hack.zip -d /root/.local/share/fonts
+fc-cache -fv
+rm -rf /tmp/nerd
+
+unset repo latest_release download_url
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0800_lynis_setup.chroot

@@ -0,0 +1,28 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+curl -fsSL https://packages.cisofy.com/keys/cisofy-software-public.key | gpg --dearmor -o /etc/apt/trusted.gpg.d/cisofy-software-public.gpg
+echo "deb [arch=amd64,arm64 signed-by=/etc/apt/trusted.gpg.d/cisofy-software-public.gpg] https://packages.cisofy.com/community/lynis/deb/ stable main" | tee /etc/apt/sources.list.d/cisofy-lynis.list
+
+apt-get update -y
+apt-get install -y lynis
+lynis show version
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0810_chrony_setup.chroot

@@ -0,0 +1,68 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+mkdir -p /var/log/chrony
+# See https://coresecret.eu/tutorials/debian-package-glossary/ for a brief description of the installed packages.
+apt-get install chrony -y
+systemctl enable chrony.service
+
+mv /etc/chrony/chrony.conf /root/.ciss/dlb/backup/chrony.conf.bak
+chmod 644 /root/.ciss/dlb/backup/chrony.conf.bak
+
+cat << 'EOF' >| /etc/chrony/chrony.conf
+# Include configuration files found in /etc/chrony/conf.d.
+confdir /etc/chrony/conf.d
+driftfile /var/lib/chrony/chrony.drift
+keyfile /etc/chrony/chrony.keys
+logdir /var/log/chrony
+ntsdumpdir /var/lib/chrony
+sourcedir /run/chrony-dhcp
+sourcedir /etc/chrony/sources.d
+
+log tracking measurements statistics
+
+authselectmode require
+
+server ptbtime1.ptb.de iburst nts minpoll 5 maxpoll 9
+server ptbtime2.ptb.de iburst nts minpoll 5 maxpoll 9
+server ptbtime3.ptb.de iburst nts minpoll 5 maxpoll 9
+server ptbtime4.ptb.de iburst nts noselect minpoll 5 maxpoll 9
+# server nts.netnod.se iburst nts minpoll 5 maxpoll 9
+
+# server ntp.ripe.net iburst nts minpoll 5 maxpoll 9
+# server ntp12.metas.ch iburst nts minpoll 5 maxpoll 9
+# server ntp2.tecnico.ulisboa.pt iburst nts minpoll 5 maxpoll 9
+# server time-c-b.nist.gov iburst nts minpoll 5 maxpoll 9
+server ntp0.fau.de iburst nts minpoll 5 maxpoll 9
+
+leapsectz right/UTC
+
+leapsecmode system
+
+maxupdateskew 100.0
+
+rtcsync
+
+makestep 1 3
+EOF
+
+chmod 644 /etc/chrony/chrony.conf
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0820_kernel_hardening_checker.chroot

@@ -0,0 +1,24 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root/git
+git clone https://github.com/a13xp0p0v/kernel-hardening-checker.git
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0822_ssh_restart_hook.chroot

@@ -0,0 +1,52 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root
+declare target_script="/etc/cron.d/restart-ssh"
+
+cat << 'EOF' >| "${target_script}"
+@reboot root /usr/local/bin/restart-ssh.sh
+EOF
+
+chmod 644 "${target_script}"
+
+cat << 'EOF' >| /usr/local/bin/restart-ssh.sh
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# Script to restart SSH at boot
+systemctl stop ssh
+sleep 5
+systemctl start ssh
+EOF
+
+chmod +x /usr/local/bin/restart-ssh.sh
+unset target_script
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0825_my_sqltuner_perl.chroot

@@ -0,0 +1,24 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root/git
+git clone --depth 1 -b master https://github.com/major/MySQLTuner-perl.git
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0830_download_yq.chroot

@@ -0,0 +1,24 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+wget https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 -O /usr/bin/yq
+chmod +x /usr/bin/yq
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0835_testssl.sh.chroot

@@ -0,0 +1,24 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root/git
+git clone https://github.com/testssl/testssl.sh.git
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0840_ufw_abuse_ipdb_reporter.chroot

@@ -0,0 +1,28 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+apt-get install -y curl
+curl -fsSL https://deb.nodesource.com/setup_22.x | sudo -E bash - && \
+apt-get install -y nodejs
+
+cd /root/git
+git clone https://github.com/sefinek/UFW-AbuseIPDB-Reporter.git
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0845_harbian_audit.chroot

@@ -0,0 +1,24 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root/git
+git clone https://github.com/hardenedlinux/harbian-audit.git
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0850_ssh_audit.chroot

@@ -0,0 +1,24 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root/git
+git clone https://github.com/jtesta/ssh-audit.git
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/0900_ufw_setup.chroot

@@ -0,0 +1,67 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+declare -r UFW_OUT_POLICY="deny"
+declare -r SSHPORT="MUST_BE_SET"
+
+ufw --force reset
+
+ufw logging medium
+
+ufw default deny incoming
+
+ufw default "${UFW_OUT_POLICY}" outgoing
+
+ufw default deny forward
+
+ufw allow in "${SSHPORT}"/tcp comment 'Incoming SSH (Custom-Port)'
+
+ufw limit "${SSHPORT}"/tcp comment 'Rate-Limit for SSH (Custom-Port)'
+
+if [[ ${UFW_OUT_POLICY,,} == "deny"  ]]; then
+  ufw allow out   21/tcp comment 'Outgoing FTP'
+  ufw allow out   22/tcp comment 'Outgoing SSH'
+  ufw allow out   25/tcp comment 'Outgoing SMTP'
+  ufw allow out   53/tcp comment 'Outgoing DNS'
+  ufw allow out   80/tcp comment 'Outgoing HTTP'
+  ufw allow out  123/tcp comment 'Outgoing NTP'
+  ufw allow out  143/tcp comment 'Outgoing IMAP'
+  ufw allow out  443/tcp comment 'Outgoing HTTPS'
+  ufw allow out  465/tcp comment 'Outgoing SMTPS'
+  ufw allow out  587/tcp comment 'Outgoing SMTPS'
+  ufw allow out  993/tcp comment 'Outgoing IMAPS'
+  ufw allow out 4460/tcp comment 'Outgoing NTS'
+  ufw allow out "${SSHPORT}"/tcp comment 'Outgoing SSH (Custom-Port)'
+  ufw allow out   53/udp comment 'Outgoing DNS'
+  ufw allow out  123/udp comment 'Outgoing NTP'
+  ufw allow out  443/udp comment 'Outgoing QUIC'
+  ufw allow out  853/udp comment 'Outgoing DoQ'
+fi
+
+sed -i "/# ok icmp code for FORWARD/i \# ok icmp codes for OUTPUT" /etc/ufw/before.rules
+sed -i "/# ok icmp code for FORWARD/i \-A ufw-before-output -p icmp --icmp-type destination-unreachable -j ACCEPT" /etc/ufw/before.rules
+sed -i "/# ok icmp code for FORWARD/i \-A ufw-before-output -p icmp --icmp-type time-exceeded -j ACCEPT" /etc/ufw/before.rules
+sed -i "/# ok icmp code for FORWARD/i \-A ufw-before-output -p icmp --icmp-type parameter-problem -j ACCEPT" /etc/ufw/before.rules
+sed -i "/# ok icmp code for FORWARD/i \-A ufw-before-output -p icmp --icmp-type echo-request -j ACCEPT" /etc/ufw/before.rules
+
+sed -i 's/^ENABLED=no/ENABLED=yes/' /etc/ufw/ufw.conf
+ln -sf /lib/systemd/system/ufw.service /etc/systemd/system/multi-user.target.wants/ufw.service
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/1024_git_clone_ciss_2025_debian_installer.chroot

@@ -0,0 +1,25 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+# TODO: MUST be uncommented
+cd /root/git
+# git clone https://git.coresecret.dev/msw/CISS.debian.installer.git
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9900_process_accounting.chroot

@@ -0,0 +1,33 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+apt-get install -y acct
+
+if [[ ! -d /etc/systemd/system/multi-user.target.wants ]]; then
+  mkdir -p /etc/systemd/system/multi-user.target.wants
+fi
+
+if ln -s /lib/systemd/system/acct.service /etc/systemd/system/multi-user.target.wants/acct.service; then
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ 'Process Accounting' enabled successful. \e[0m\n"
+else
+  printf "\e[91m++++ ++++ ++++ ++++ ++++ ++++ ++ ❌ 'Process Accounting' already enabled. \e[0m\n" >&2
+fi
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9910_motd.chroot

@@ -0,0 +1,31 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+mkdir -p /root/.ciss/dlb/backup/update-motd.d
+cp -af /etc/update-motd.d/* /root/.ciss/dlb/backup/update-motd.d
+
+cat << 'EOF' >| /etc/update-motd.d/10-uname
+#!/bin/sh
+uname -snrm
+EOF
+
+chmod 0755 /etc/update-motd.d/10-uname
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' successful applied. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9920_deleting_invalid_x509.chroot

@@ -0,0 +1,170 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+declare -a search_dirs=("/etc/ssl/certs" "/usr/local/share/ca-certificates" "/usr/share/ca-certificates" "/etc/letsencrypt")
+declare backup_dir="/root/.ciss/dlb/backup/certificates"
+declare current_date
+current_date=$(date +%s)
+declare -ax expired_certificates=()
+
+#######################################
+# Backup Wrapper for all x509 Root CA Certs
+# Globals:
+#   backup_dir
+#   search_dirs
+#   dir
+# Arguments:
+#  None
+#######################################
+create_backup() {
+  printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 Backup Certificate: '%s' ... \e[0m\n" "${backup_dir}"
+  mkdir -p "${backup_dir}"
+  declare dir=""
+  for dir in "${search_dirs[@]}"; do
+    if [ -d "${dir}" ] && compgen -G "${dir}"/* > /dev/null; then
+      cp -r "${dir}"/* "${backup_dir}"
+    fi
+  done
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Backup Certificate: '%s' done.\e[0m\n" "${backup_dir}"
+}
+
+#######################################
+# Check the validity of each certificate.
+# Globals:
+#   CERT
+#   CERT_DATE
+#   CERT_DATE_SECONDS
+#   CURRENT_DATE
+#   DIR
+#   EXPIRED_CERTIFICATES
+#   SEARCH_DIRS
+# Arguments:
+#  None
+#######################################
+check_certificates() {
+  declare dir=""
+  declare cert=""
+  declare cert_date=""
+  declare cert_date_seconds=""
+  for dir in "${search_dirs[@]}"; do
+    while IFS= read -r -d '' cert; do
+      cert_date=$(openssl x509 -in "${cert}" -noout -enddate | sed 's/notAfter=//')
+      cert_date_seconds=$(date -d "${cert_date}" +%s)
+      if [[ ${cert_date_seconds} -lt ${current_date} ]]; then
+        declare -g expired_certificates+=("${cert}")
+      fi
+    done < <(find "${dir}" -type f \( -name "*.crt" -o -name "*.pem" \) -print0)
+  done
+}
+#   done < <(find "${dir}" -type f -name "*.crt" -o -name "*.pem" -print0)
+#   done < <(find "${DIR}" -type f \( -name "*.crt" -o -name "*.pem" \) -print0)
+
+#######################################
+# Find and clean all ca-certificates.crt files in SEARCH_DIRS.
+# Globals:
+#   CURRENT_DATE
+#   SEARCH_DIRS
+#   cert
+#   line
+# Arguments:
+#  None
+#######################################
+delete_expired_from_all_bundles() {
+  declare dir bundle
+  for dir in "${search_dirs[@]}"; do
+    bundle="${dir}/ca-certificates.crt"
+    if [[ -f ${bundle} ]]; then
+      printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 Checking Root-CA Bundle: '%s' ...\e[0m\n" "${bundle}"
+      declare tmp_bundle="${bundle}.tmp"
+      declare -a block=()
+      declare expired=0
+      declare enddate cert_date_seconds
+
+      : > "${tmp_bundle}"
+
+      declare line=""
+      while IFS= read -r line; do
+        block+=("${line}")
+        if [[ ${line} == "-----END CERTIFICATE-----"   ]]; then
+          cert=$(printf "%s\n" "${block[@]}")
+          enddate=$(echo "${cert}" | openssl x509 -noout -enddate 2> /dev/null | sed 's/notAfter=//')
+          if [[ -n ${enddate}   ]]; then
+            declare cert_date_seconds=""
+            cert_date_seconds=$(date -d "${enddate}" +%s)
+            if [[ ${cert_date_seconds} -lt ${current_date} ]]; then
+              expired=1
+            else
+              expired=0
+            fi
+          else
+            expired=0
+          fi
+          if [[ ${expired} -eq 0 ]]; then
+            printf "%s\n" "${block[@]}" >> "${tmp_bundle}"
+          else
+            printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅  Certificate deleted: '%s' (Expired: %s)\e[0m\n" "${bundle}" "${enddate}"
+          fi
+          block=()
+        fi
+      done < "${bundle}"
+
+      mv -f "${tmp_bundle}" "${bundle}"
+      printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Checking Root-CA Bundle: '%s' done. \e[0m\n" "${bundle}"
+    fi
+  done
+}
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 Check certificates in: '%s'.\e[0m\n" "${search_dirs[*]}"
+create_backup
+delete_expired_from_all_bundles
+check_certificates
+
+if [[ ${#expired_certificates[@]} -eq 0 ]]; then
+
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ No expired certificates found.\e[0m\n"
+
+else
+
+  printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 Expired certificates found:\e[0m\n"
+
+  for exp_cert in "${expired_certificates[@]}"; do
+    printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ '%s'. \e[0m\n" "${exp_cert}"
+  done
+
+  for exp_cert in "${expired_certificates[@]}"; do
+    rm -f "${exp_cert}"
+    printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Certificate deleted: '%s'.\e[0m\n" "${exp_cert}"
+    basename=$(basename "${exp_cert}")
+    mozilla_entry="mozilla/${basename%.pem}.crt"
+    mozilla_entry="${mozilla_entry%.crt}.crt"
+    declare ca_conf="/etc/ca-certificates.conf"
+    if grep -Fxq "${mozilla_entry}" "${ca_conf}"; then
+      sed -i "s|^${mozilla_entry}$|#${mozilla_entry}|" "${ca_conf}"
+      printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Entry in ca-certificates.conf deselected: '#%s'.\e[0m\n" "${mozilla_entry}"
+    fi
+  done
+
+  printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Updating the certificate cache ... \e[0m\n"
+  update-ca-certificates --fresh
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Updating the certificate cache done.\e[0m\n"
+  # sleep 1
+fi
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9930_hardening_ssh.chroot

@@ -0,0 +1,64 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /etc/ssh || {
+  printf "\e[91mm++++ ++++ ++++ ++++ ++++ ++++ ++ Could not find /etc/ssh \e[0m\n"
+}
+rm -rf ssh_host_*key*
+
+ssh-keygen -o -N "" -t ed25519 -f /etc/ssh/ssh_host_ed25519_key -C "root@live-$(date -I)"
+ssh-keygen -o -N "" -t rsa -b 8192 -f /etc/ssh/ssh_host_rsa_key -C "root@live-$(date -I)"
+
+awk '$5 >= 4000' /etc/ssh/moduli >| /etc/ssh/moduli.safe
+rm -rf /etc/ssh/moduli
+mv /etc/ssh/moduli.safe /etc/ssh/moduli
+
+chmod 0600 /etc/ssh/ssh_host_*_key
+chown root:root /etc/ssh/ssh_host_*_key
+chmod 0644 /etc/ssh/ssh_host_*_key.pub
+chown root:root /etc/ssh/ssh_host_*_key.pub
+
+chmod 600 /etc/ssh/sshd_config /etc/ssh/ssh_config
+
+touch /root/sshfp
+ssh-keygen -r @ >| /root/sshfp
+
+###########################################################################################
+# Remarks: The file /etc/profile.d/idle-users.sh is created to set two read-only          #
+# environment variables: TMOUT and HISTFILE.                                              #
+# TMOUT=14400 ensures that users are automatically logged out after 4 hours of inactivity.#
+# readonly HISTFILE ensures that the command history cannot be changed.                   #
+# The chmod +x command ensures that the file is executed in every shell session.          #
+###########################################################################################
+cat << 'EOF' >| /etc/profile.d/idle-users.sh
+declare -girx TMOUT=14400
+EOF
+
+chmod +x /etc/profile.d/idle-users.sh
+
+mkdir -p /etc/systemd/system/ssh.service.d
+cat << 'EOF' >| /etc/systemd/system/ssh.service.d/override.conf
+[Unit]
+After=ufw.service
+Requires=ufw.service
+EOF
+chmod 0644 /etc/systemd/system/ssh.service.d/override.conf
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9940_hardening_memory.dump.chroot

@@ -0,0 +1,37 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cp -u /etc/security/limits.conf /root/.ciss/dlb/backup/limits.conf.bak
+chmod 0644 /root/.ciss/dlb/backup/limits.conf.bak
+sed -i "/#*               soft    core            0/ i\*               soft    core            0" /etc/security/limits.conf
+sed -i "/#root            hard    core            100000/ i\*               hard    core            0" /etc/security/limits.conf
+
+if [[ ! -d /etc/systemd/coredump.conf.d ]]; then
+  mkdir -p /etc/systemd/coredump.conf.d
+fi
+
+touch /etc/systemd/coredump.conf.d/disable.conf
+chmod 0644 /etc/systemd/coredump.conf.d/disable.conf
+cat << EOF >| /etc/systemd/coredump.conf.d/disable.conf
+[Coredump]
+Storage=none
+EOF
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9950_fail2ban_hardening.chroot

@@ -0,0 +1,148 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root
+
+cp -u /etc/fail2ban/fail2ban.conf /root/.ciss/dlb/backup/fail2ban.conf.bak
+chmod 0644 /root/.ciss/dlb/backup/fail2ban.conf.bak
+
+### https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1024305
+sed -i 's/#allowipv6 = auto/allowipv6 = auto/1' /etc/fail2ban/fail2ban.conf
+
+mv /etc/fail2ban/jail.d/defaults-debian.conf /root/.ciss/dlb/backup/defaults-debian.conf.bak
+chmod 0644 /root/.ciss/dlb/backup/defaults-debian.conf.bak
+
+cat << 'EOF' >| /etc/fail2ban/jail.d/centurion-default.conf
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <cendev@coresecret.eu>
+# SPDX-ExternalRef: GIT https://cendev.eu/marc.weidner/CISS.2025.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <cendev@coresecret.eu>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.2025.hardened.installer framework.
+# SPDX-PackageName: CISS.2025.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+[DEFAULT]
+usedns    = yes
+# local | vpn
+ignoreip  = 127.0.0.0/8 ::1 MUST_BE_SET
+maxretry  = 8
+findtime  = 24h
+bantime   = 24h
+
+### SSH Handling: Foreign IP (not in /etc/hosts.allow): refused to connect: immediate ban [sshd-refused]
+###               Jump host mistyped 1–3 times: no ban, only after four attempts          [sshd]
+
+[sshd]
+enabled   = true
+backend   = systemd
+filter    = sshd
+mode      = normal
+port      = MUST_BE_SET
+protocol  = tcp
+logpath   = /var/log/auth.log
+maxretry  = 4
+findtime  = 24h
+bantime   = 24h
+
+[sshd-refused]
+enabled   = true
+filter    = sshd-refused
+port      = MUST_BE_SET
+protocol  = tcp
+logpath   = /var/log/auth.log
+maxretry  = 1
+findtime  = 24h
+bantime   = 24h
+
+# ufw aggressive approach:
+# Any valid client communicating with our server should be going directly to the service ports opened in ufw (ssh, 80, 443, ...).
+# Any client touching other ports is treated as malicious and therefore should be blocked access to ALL ports after one attempt.
+
+[ufw]
+enabled   = true
+filter    = ufw.aggressive
+action    = iptables-allports
+logpath   = /var/log/ufw.log
+maxretry  = 1
+findtime  = 24h
+bantime   = 24h
+protocol  = tcp,udp
+
+EOF
+
+cat << EOF >| /etc/fail2ban/filter.d/ufw.aggressive.conf
+[Definition]
+failregex = ^.*UFW BLOCK.* SRC=<HOST> .*DPT=\d+ .*
+EOF
+
+cat << EOF >| /etc/fail2ban/filter.d/sshd-refused.conf
+[Definition]
+failregex = ^refused connect from \S+ \(<HOST>\)
+EOF
+
+###########################################################################################
+# Remarks: hardening of fail2ban systemd                                                  #
+###########################################################################################
+# https://wiki.archlinux.org/title/fail2ban#Service_hardening                             #
+# The CapabilityBoundingSet parameters CAP_DAC_READ_SEARCH will allow Fail2ban full read  #
+# access to every directory and file. CAP_NET_ADMIN and CAP_NET_RAW allow Fail2ban to     #
+# operate # on any firewall that has a command-line shell interface. By using             #
+# ProtectSystem=strict the filesystem hierarchy will only be read-only; ReadWritePaths    #
+# allows Fail2ban to have write access on required paths.                                 #
+###########################################################################################
+mkdir -p /etc/systemd/system/fail2ban.service.d
+mkdir /var/log/fail2ban
+
+cat << 'EOF' >| /etc/systemd/system/fail2ban.service.d/override.conf
+[Service]
+PrivateDevices=yes
+PrivateTmp=yes
+ProtectHome=read-only
+ProtectSystem=strict
+ReadWritePaths=-/var/run/fail2ban
+ReadWritePaths=-/var/lib/fail2ban
+ReadWritePaths=-/var/log/fail2ban
+ReadWritePaths=-/var/spool/postfix/maildrop
+ReadWritePaths=-/run/xtables.lock
+CapabilityBoundingSet=CAP_AUDIT_READ CAP_DAC_READ_SEARCH CAP_NET_ADMIN CAP_NET_RAW
+
+### Added by CISS.debian.live.builder
+ProtectClock=true
+ProtectHostname=true
+
+EOF
+
+cat << 'EOF' >> /etc/fail2ban/fail2ban.local
+[Definition]
+logtarget = /var/log/fail2ban/fail2ban.log
+EOF
+
+###########################################################################################
+# Remarks: Logrotate must be updated either                                               #
+###########################################################################################
+cp -a /etc/logrotate.d/fail2ban /root/.ciss/dlb/backup/fail2ban_logrotate.bak
+sed -i 's/\/var\/log\/fail2ban.log/\/var\/log\/fail2ban\/fail2ban.log/1' /etc/logrotate.d/fail2ban
+touch /var/log/fail2ban/fail2ban.log
+chmod 640 /var/log/fail2ban/fail2ban.log
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9960_disable_services.chroot

@@ -0,0 +1,31 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+###########################################################################################
+# Remarks: Turn off Energy saving mode and ctrl-alt-del                                   #
+###########################################################################################
+declare target=""
+for target in sleep.target suspend.target hibernate.target hybrid-sleep.target ctrl-alt-del.target; do
+  ln -sf /dev/null "/etc/systemd/system/${target}"
+done
+
+unset target
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9970_remove_exim.chroot

@@ -0,0 +1,40 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /etc
+
+apt-get purge exim4 -y
+apt-get purge exim4-base -y
+apt-get purge exim4-config -y
+
+apt-get autoremove -y
+apt-get autoclean -y
+apt-get autopurge -y
+
+apt-mark hold exim4 exim4-daemon-light exim4-base exim4-config
+
+apt-get update -y
+apt-get upgrade -y
+
+if [[ -d /etc/exim4 ]]; then
+  rm -rf /etc/exim4
+fi
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9980_usb_guard.chroot

@@ -0,0 +1,45 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+apt-get install -y usbguard
+
+# sleep 1
+
+# Preparing USBGuard: see https://www.privacy-handbuch.de/handbuch_91a.htm
+touch /tmp/rules.conf
+usbguard generate-policy >> /tmp/rules.conf
+
+if [[ -f /etc/usbguard/rules.conf && -s /etc/usbguard/rules.conf ]]; then
+  mv /etc/usbguard/rules.conf /root/.ciss/dlb/backup/usbguard_rules.conf.bak
+  cp -a /tmp/rules.conf /etc/usbguard/rules.conf
+  chmod 0600 /etc/usbguard/rules.conf
+else
+  rm -f /etc/usbguard/rules.conf
+  cp -a /tmp/rules.conf /etc/usbguard/rules.conf
+  chmod 0600 /etc/usbguard/rules.conf
+fi
+
+cp -a /etc/usbguard/usbguard-daemon.conf /root/.ciss/dlb/backup/usbguard-daemon.conf.bak
+sed -i "s/PresentDevicePolicy=apply-policy/PresentDevicePolicy=allow/" /etc/usbguard/usbguard-daemon.conf
+# sleep 1
+
+rm -f /tmp/rules.conf
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9985_clamav.chroot

@@ -0,0 +1,77 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+mkdir -p /etc/systemd/system/clamav-daemon.service.d
+cat << 'EOF' >| /etc/systemd/system/clamav-daemon.service.d/override.conf
+[Service]
+User=clamav
+Group=clamav
+ProtectSystem=full
+ProtectHome=read-only
+PrivateTmp=yes
+NoNewPrivileges=yes
+PermissionsStartOnly=true
+ExecStartPre=/bin/mkdir -p /run/clamav
+ExecStartPre=/bin/chown clamav:clamav /run/clamav
+ExecStartPre=/bin/chmod 750 /run/clamav
+
+ReadOnlyPaths=/
+ReadWritePaths=/var/lib/clamav /var/log/clamav /var/run/clamav /run/clamav
+
+MemoryDenyWriteExecute=yes
+MemoryLimit=512M
+CPUShares=512
+
+RestrictAddressFamilies=AF_INET AF_INET6
+RestrictNamespaces=yes
+RestrictRealtime=yes
+SystemCallFilter=@system-service
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SYS_NICE
+
+EOF
+chmod 0644 /etc/systemd/system/clamav-daemon.service.d/override.conf
+
+mkdir -p /etc/systemd/system/clamav-freshclam.service.d
+cat << 'EOF' >| /etc/systemd/system/clamav-freshclam.service.d/override.conf
+[Service]
+User=clamav
+Group=clamav
+ProtectSystem=full
+ProtectHome=read-only
+PrivateTmp=yes
+NoNewPrivileges=yes
+
+ReadOnlyPaths=/
+ReadWritePaths=/var/lib/clamav /var/log/clamav /var/run/clamav
+
+MemoryDenyWriteExecute=yes
+MemoryLimit=512M
+CPUShares=512
+
+RestrictAddressFamilies=AF_INET AF_INET6
+RestrictNamespaces=yes
+RestrictRealtime=yes
+SystemCallFilter=@system-service
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SYS_NICE
+
+EOF
+chmod 0644 /etc/systemd/system/clamav-freshclam.service.d/override.conf
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9990_final_purge.chroot

@@ -0,0 +1,59 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+apt-get update -y
+
+apt-get purge -y exim4 exim4-daemon-light exim4-base exim4-config \
+qemu-guest-agent rmail sendmail-base sendmail-bin sendmail-cf sensible-mda sendmail-doc
+
+apt-mark hold exim4 exim4-daemon-light exim4-base exim4-config \
+qemu-guest-agent rmail sendmail-base sendmail-bin sendmail-cf sensible-mda sendmail-doc
+
+dpkg --get-selections | grep deinstall >> /tmp/deinstall.log || true
+
+if [[ -s /tmp/deinstall.log ]]; then
+  printf "\n"
+  printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 Packages to purge ... \e[0m\n"
+  sed -i 's!deinstall!!' /tmp/deinstall.log
+  while IFS= read -r line; do
+    declare trimmed_string
+    trimmed_string=$(echo "$line" | awk '{$1=$1};1')
+    echo "y" | apt-get purge "${trimmed_string}"
+    printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Package '%s' purged. \e[0m\n" "${trimmed_string}"
+    # sleep 1
+  done < /tmp/deinstall.log
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Packages to purge done. \e[0m\n"
+else
+  printf "\n"
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ No Packages to purge, proceeding with clean up. \e[0m\n"
+fi
+
+apt-get update -y
+apt-get upgrade -y
+
+rm -f /tmp/deinstall.log
+rm -fr /opt/udebs
+apt-get autoclean -y
+apt-get autoremove -y
+apt-get autopurge -y
+
+updatedb
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' successful applied. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9991_file_permissions.chroot

@@ -0,0 +1,105 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+chmod 0644 /etc/banner
+chmod 0644 /etc/issue
+chmod 0644 /etc/issue.net
+
+if [[ -f /etc/motd ]]; then
+  cp -a /etc/motd /root/.ciss/dlb/backup/motd.bak
+  chmod 0644 /root/.ciss/dlb/backup/motd.bak
+  rm /etc/motd
+fi
+
+touch /etc/motd
+cat << EOF >| /etc/motd
+
+      (c) Marc S. Weidner, 2018 - 2025
+      (p) Centurion Press, 2018 - 2025
+          Centurion Intelligence Consulting Agency (tm)
+          https://coresecret.eu/
+          Please consider making a donation:
+          https://coresecret.eu/spenden/
+
+
+EOF
+
+cp -a /etc/login.defs /root/.ciss/dlb/backup/login.defs.bak
+
+sed -i 's/UMASK		022/UMASK		077/' /etc/login.defs
+sed -i 's/PASS_MAX_DAYS	99999/PASS_MAX_DAYS	16384/' /etc/login.defs
+sed -i 's/PASS_MIN_DAYS	0/PASS_MIN_DAYS	1/' /etc/login.defs
+sed -i 's/PASS_WARN_AGE	7/PASS_WARN_AGE	128/' /etc/login.defs
+sed -i 's/ENCRYPT_METHOD SHA512/ENCRYPT_METHOD YESCRYPT/' /etc/login.defs
+sed -i 's/#SHA_CRYPT_MIN_ROUNDS 5000/SHA_CRYPT_MIN_ROUNDS 8388608/' /etc/login.defs
+sed -i 's/#SHA_CRYPT_MAX_ROUNDS 5000/SHA_CRYPT_MAX_ROUNDS 8388608/' /etc/login.defs
+sed -i 's/#YESCRYPT_COST_FACTOR 5/YESCRYPT_COST_FACTOR 8/' /etc/login.defs
+
+if [[ -f /etc/cron.deny ]]; then
+  rm /etc/cron.deny
+fi
+
+if [[ -f /etc/cron.allow ]]; then
+  cp -u /etc/cron.allow /root/.backup/cron.allow.bak
+  chmod 644 /root/.backup/cron.allow.bak
+  chmod 600 /etc/cron.allow
+  cat << EOF >| /etc/cron.allow
+root
+EOF
+
+else
+  touch /etc/cron.allow
+  chmod 0600 /etc/cron.allow
+  cat << EOF >| /etc/cron.allow
+root
+EOF
+fi
+
+chmod g-wx,o-rwx /etc/cron.allow
+chown root:root /etc/cron.allow
+chmod 0640 /etc/shadow
+chown root:shadow /etc/shadow
+
+chmod 0700 /etc/cron.d /etc/cron.daily /etc/cron.hourly /etc/cron.monthly /etc/cron.weekly
+chmod 0700 /etc/sudoers.d
+chmod 0600 /etc/crontab
+
+chmod 0600 /etc/ssh/sshd_config /etc/ssh/ssh_config
+
+chmod 0750 /home
+
+if chmod 0750 /var/spool/apt-mirror; then :; fi
+
+mkdir /root/.ansible
+
+declare bin
+declare target
+for bin in as gcc g++ cc clang; do
+  target=$(readlink -f "/usr/bin/${bin}") || {
+    printf "\e[92m✅ Info: '%s' not found, skipping. \e[0m\n" "${bin}"
+    continue
+  }
+  chmod 700 "${target}" || {
+    printf "\e[92m❌ Error: chmod failed for '%s', skipping. \e[0m\n" "${bin}"
+  }
+done
+unset bin target
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' successful applied. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9992_password_expiration.chroot

@@ -0,0 +1,52 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+if ! command -v chage &>/dev/null; then
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Info: 'chage' NOT found. Exiting hook ... \e[0m\n"
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+  # sleep 1
+  exit 0
+fi
+
+declare -i max_days=16384
+mapfile -t users_to_update < <(
+  awk -F: '$2 !~ /^[!*]/ { print $1 }' /etc/shadow
+)
+
+if [[ ${#users_to_update[@]} -eq 0 ]]; then
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ No enabled-login accounts found in /etc/shadow. Exiting hook ... \e[0m\n"
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+  # sleep 1
+  exit 0
+fi
+
+declare user
+for user in "${users_to_update[@]}"; do
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ Setting max password age for user '%s' to '%s' days. \e[0m\n" "${user}" "${max_days}"
+  chage --maxdays "$max_days" "$user"
+done
+
+unset max_days user users_to_update
+
+awk -F: '$2 !~ /^\$[0-9]/ && length($2)==13 { print $1,$2 }' /etc/shadow
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ All applicable accounts have been updated. \e[0m\n"
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9993_aide.chroot

@@ -0,0 +1,32 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+apt-get install -y aide
+
+cp -u /etc/aide/aide.conf /root/.ciss/dlb/backup/aide.conf.bak
+sed -i "s/Checksums = H/Checksums = sha512/" /etc/aide/aide.conf
+
+if aideinit; then
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ 'aideinit' successful. \e[0m\n"
+else
+  printf "\e[91m++++ ++++ ++++ ++++ ++++ ++++ ++ ❌ 'aideinit' NOT successful. \e[0m\n" >&2
+fi
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9994_password_policy.chroot

@@ -0,0 +1,135 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+### NIST recommends at least eight characters but advises longer passphrases (e.g., 12–64) for increased security.
+### NIST SP 800–63B, https://pages.nist.gov/800-63-3/sp800-63b.html
+
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cp -a /etc/security/pwquality.conf /root/.ciss/dlb/backup/pwquality.conf.bak
+chmod 0644 /root/.ciss/dlb/backup/pwquality.conf.bak
+
+cat << 'EOF' >| /etc/security/pwquality.conf
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+### Current recommendations for '/etc/security/pwquality.conf' based on common best practices,
+### including NIST SP 800–63B, https://pages.nist.gov/800-63-3/sp800-63b.html
+### and weighing usability against security.
+
+### Configuration for systemwide password quality limits
+### Defaults:
+
+### Number of characters in the new password that must not be present in the
+### old password.
+difok = 4
+
+### Length over complexity: Studies show that longer passphrases are significantly more
+### resistant to brute-force and dictionary attacks. NIST recommends at least eight characters
+### but advises longer passphrases (e.g., 12–64) for increased security. Twenty characters strike a
+### good balance between security and user convenience.
+### Minimum acceptable size for the new password (plus one if
+### credits are not disabled, which is the default). (See pam_cracklib manual.)
+### Cannot be set to a lower value than 6.
+minlen = 20
+
+### dcredit = 0, ucredit = 0, lcredit = 0, ocredit = 0, minclass = 0
+### NIST SP 800–63B advises against rigid complexity rules (numbers, symbols, uppercase)
+### because they can lead users to adopt predictable patterns (e.g., “Pa$$word!”).
+### Length and dictionary checks are more effective.
+
+  ### The maximum credit for having digits in the new password. If less than 0
+  ### it is the minimum number of digits in the new password.
+  dcredit = 0
+
+  ### The maximum credit for having uppercase characters in the new password.
+  ### If less than 0, it is the minimum number of uppercase characters in the new
+  ### password.
+  ucredit = 0
+
+  ### The maximum credit for having lowercase characters in the new password.
+  ### If less than 0, it is the minimum number of lowercase characters in the new
+  ### password.
+  lcredit = 0
+
+  ### The maximum credit for having other characters in the new password.
+  ### If less than 0, it is the minimum number of other characters in the new
+  ### password.
+  ocredit = 0
+
+  ### The minimum number of required classes of characters for the new
+  ### password (digits, uppercase, lowercase, others).
+  minclass = 0
+
+### The maximum number of allowed consecutive same characters in the new password.
+### The check is disabled if the value is 0.
+maxrepeat = 2
+
+### The maximum number of allowed consecutive characters of the same class in the
+### new password.
+### The check is disabled if the value is 0.
+maxclassrepeat = 4
+
+### Whether to check for the words from the passwd entry GECOS string of the user.
+### The check is enabled if the value is not 0.
+### gecoscheck = 0
+
+### Whether to check for the words from the cracklib dictionary.
+### The check is enabled if the value is not 0.
+dictcheck = 1
+
+### Whether to check if it contains the username in some form.
+### The check is enabled if the value is not 0.
+usercheck = 1
+
+### Length of substrings from the username to check for in the password
+### The check is enabled if the value is greater than 0, and the usercheck is enabled.
+usersubstr = 3
+
+### Whether the check is enforced by the PAM module and possibly other
+### applications.
+### The new password is rejected if it fails the check, and the value is not 0.
+enforcing = 1
+
+### Path to the cracklib dictionaries. The default is to use the cracklib default.
+dictpath =
+
+# Prompt user at most N times before returning with error. The default is 1.
+retry = 3
+
+# Enforces pwquality checks on the root user password.
+# Enabled if the option is present.
+enforce_for_root
+
+# Skip testing the password quality for users that are not present in the
+# /etc/passwd file.
+# Enabled if the option is present.
+local_users_only
+
+EOF
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9995_sysstat.chroot

@@ -0,0 +1,23 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+sed -i 's#^\(ENABLED=\).*#\1"true"#' /etc/default/sysstat
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9996_auditd.chroot

@@ -0,0 +1,332 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+### https://github.com/linux-audit/audit-userspace/tree/master/rules
+
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root
+
+apt-get install auditd -y
+
+cp -u /etc/audit/audit.rules /root/.ciss/dlb/backup/audit.rules.bak
+cp -u /etc/audit/auditd.conf /root/.ciss/dlb/backup/auditd.conf.bak
+cp -u /etc/audit/rules.d/audit.rules /root/.ciss/dlb/backup/rules_d_audit.rules.bak
+rm -rf /etc/audit/rules.d/audit.rules
+
+############################################################### /etc/audit/rules.d/10-base-config.rules
+cat << EOF >| /etc/audit/rules.d/10-base-config.rules
+## First rule - delete all
+-D
+
+## Increase the buffers to survive stress events.
+## Make this bigger for busy systems
+-b 8192
+
+## This determine how long to wait in burst of events
+--backlog_wait_time 60000
+
+## Set failure mode to syslog
+-f 1
+EOF
+
+############################################################### /etc/audit/rules.d/11-loginuid.rules
+cat << EOF >| /etc/audit/rules.d/11-loginuid.rules
+--loginuid-immutable
+EOF
+
+############################################################### /etc/audit/rules.d/20-dont-audit.rules
+cat << EOF >| /etc/audit/rules.d/20-dont-audit.rules
+## This is for don't audit rules. We put these early because audit
+### is a first match wins system. Uncomment the rules you want.
+
+## Cron jobs fill the logs with stuff we normally don't want
+-a never,user -F subj_type=crond_t
+
+## This prevents chrony from overwhelming the logs
+-a never,exit -F arch=x86_64 -S adjtimex -F auid=unset -F uid=chrony -F subj_type=chronyd_t
+
+### This is not very interesting and wastes a lot of space if
+### the server is public facing
+-a always,exclude -F msgtype=CRYPTO_KEY_USER
+EOF
+
+############################################################### /etc/audit/rules.d/21-no32bit.rules
+cat << EOF >| /etc/audit/rules.d/21-no32bit.rules
+## If you are on a 64 bit platform, everything _should_ be running
+## in 64 bit mode. This rule will detect any use of the 32 bit syscalls
+## because this might be a sign of someone exploiting a hole in the 32
+## bit ABI.
+-a always,exit -F arch=b32 -S all -F key=32bit-abi
+EOF
+
+############################################################### /etc/audit/rules.d/22-ignore-chrony.rules
+cat << EOF >| /etc/audit/rules.d/22-ignore-chrony.rules
+## This rule suppresses the time-change event when chrony does time updates
+-a never,exit -F arch=b64 -S adjtimex -F auid=unset -F uid=chrony -F subj_type=chronyd_t
+-a never,exit -F arch=b32 -S adjtimex -F auid=unset -F uid=chrony -F subj_type=chronyd_t
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-1-create-failed.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-1-create-failed.rules
+## Unsuccessful file creation (open with O_CREAT)
+-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&0100 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&0100 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b32 -S open -F a1&0100 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b64 -S open -F a1&0100 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b32 -S creat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b64 -S creat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&0100 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&0100 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b32 -S open -F a1&0100 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b64 -S open -F a1&0100 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b32 -S creat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+-a always,exit -F arch=b64 -S creat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-1-create-success.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-1-create-success.rules
+## Successful file creation (open with O_CREAT)
+-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&0100 -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-create
+-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&0100 -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-create
+-a always,exit -F arch=b32 -S open -F a1&0100 -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-create
+-a always,exit -F arch=b64 -S open -F a1&0100 -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-create
+-a always,exit -F arch=b32 -S creat -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-create
+-a always,exit -F arch=b64 -S creat -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-create
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-2-modify-failed.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-2-modify-failed.rules
+## Unsuccessful file modifications (open for write or truncate)
+-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&01003 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&01003 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b32 -S open -F a1&01003 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b64 -S open -F a1&01003 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b32 -S truncate,ftruncate -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b64 -S truncate,ftruncate -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&01003 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&01003 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b32 -S open -F a1&01003 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b64 -S open -F a1&01003 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b32 -S truncate,ftruncate -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+-a always,exit -F arch=b64 -S truncate,ftruncate -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-2-modify-success.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-2-modify-success.rules
+## Successful file modifications (open for write or truncate)
+-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&01003 -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-modification
+-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&01003 -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-modification
+-a always,exit -F arch=b32 -S open -F a1&01003 -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-modification
+-a always,exit -F arch=b64 -S open -F a1&01003 -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-modification
+-a always,exit -F arch=b32 -S truncate,ftruncate -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-modification
+-a always,exit -F arch=b64 -S truncate,ftruncate -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-modification
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-3-access-failed.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-3-access-failed.rules
+## Unsuccessful file access (any other opens) This has to go last.
+-a always,exit -F arch=b32 -S open,openat,openat2,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-access
+-a always,exit -F arch=b64 -S open,openat,openat2,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-access
+-a always,exit -F arch=b32 -S open,openat,openat2,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-access
+-a always,exit -F arch=b64 -S open,openat,openat2,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-access
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-3-access-success.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-3-access-success.rules
+## Successful file access (any other opens) This has to go last.
+## These next two are likely to result in a whole lot of events
+-a always,exit -F arch=b32 -S open,openat,openat2,open_by_handle_at -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-access
+-a always,exit -F arch=b64 -S open,openat,openat2,open_by_handle_at -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-access
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-4-delete-failed.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-4-delete-failed.rules
+## Unsuccessful file delete
+-a always,exit -F arch=b32 -S unlink,unlinkat,rename,renameat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-delete
+-a always,exit -F arch=b64 -S unlink,unlinkat,rename,renameat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-delete
+-a always,exit -F arch=b32 -S unlink,unlinkat,rename,renameat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-delete
+-a always,exit -F arch=b64 -S unlink,unlinkat,rename,renameat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-delete
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-4-delete-success.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-4-delete-success.rules
+## Successful file delete
+-a always,exit -F arch=b32 -S unlink,unlinkat,rename,renameat -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-delete
+-a always,exit -F arch=b64 -S unlink,unlinkat,rename,renameat -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-delete
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-5-perm-change-failed.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-5-perm-change-failed.rules
+## Unsuccessful permission change
+-a always,exit -F arch=b32 -S chmod,fchmod,fchmodat,setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-perm-change
+-a always,exit -F arch=b64 -S chmod,fchmod,fchmodat,setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-perm-change
+-a always,exit -F arch=b32 -S chmod,fchmod,fchmodat,setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-perm-change
+-a always,exit -F arch=b64 -S chmod,fchmod,fchmodat,setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-perm-change
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-5-perm-change-success.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-5-perm-change-success.rules
+## Successful permission change
+-a always,exit -F arch=b32 -S chmod,fchmod,fchmodat,setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-perm-change
+-a always,exit -F arch=b64 -S chmod,fchmod,fchmodat,setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-perm-change
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-6-owner-change-failed.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-6-owner-change-failed.rules
+## Unsuccessful ownership change
+-a always,exit -F arch=b32 -S lchown,fchown,chown,fchownat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change
+-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change
+-a always,exit -F arch=b32 -S lchown,fchown,chown,fchownat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change
+-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42-6-owner-change-success.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42-6-owner-change-success.rules
+## Successful ownership change
+-a always,exit -F arch=b32 -S lchown,fchown,chown,fchownat -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-owner-change
+-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F success=1 -F auid>=1000 -F auid!=unset -F key=successful-owner-change
+EOF
+
+############################################################### /etc/audit/rules.d/30-ospp-v42.rules
+cat << EOF >| /etc/audit/rules.d/30-ospp-v42.rules
+## The purpose of these rules is to meet the requirements for Operating
+## System Protection Profile (OSPP)v4.2. These rules depends on having
+## the following rule files copied to /etc/audit/rules.d:
+##
+## 10-base-config.rules, 11-loginuid.rules,
+## 30-ospp-v42-1-create-failed.rules, 30-ospp-v42-1-create-success.rules,
+## 30-ospp-v42-2-modify-failed.rules, 30-ospp-v42-2-modify-success.rules,
+## 30-ospp-v42-3-access-failed.rules, 30-ospp-v42-3-access-success.rules,
+## 30-ospp-v42-4-delete-failed.rules, 30-ospp-v42-4-delete-success.rules,
+## 30-ospp-v42-5-perm-change-failed.rules,
+## 30-ospp-v42-5-perm-change-success.rules,
+## 30-ospp-v42-6-owner-change-failed.rules,
+## 30-ospp-v42-6-owner-change-success.rules
+##
+## original copies may be found in /usr/share/audit-rules
+
+
+## User add delete modify. This is covered by pam. However, someone could
+## open a file and directly create or modify a user, so we'll watch passwd and
+## shadow for writes
+-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&03 -F path=/etc/passwd -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&03 -F path=/etc/passwd -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b32 -S open -F a1&03 -F path=/etc/passwd -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b64 -S open -F a1&03 -F path=/etc/passwd -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&03 -F path=/etc/shadow -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&03 -F path=/etc/shadow -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b32 -S open -F a1&03 -F path=/etc/shadow -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b64 -S open -F a1&03 -F path=/etc/shadow -F auid>=1000 -F auid!=unset -F key=user-modify
+
+## User enable and disable. This is entirely handled by pam.
+
+## Group add delete modify. This is covered by pam. However, someone could
+## open a file and directly create or modify a user, so we'll watch group and
+## gshadow for writes
+-a always,exit -F arch=b32 -F path=/etc/passwd -F perm=wa -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b64 -F path=/etc/passwd -F perm=wa -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b32 -F path=/etc/shadow -F perm=wa -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b64 -F path=/etc/shadow -F perm=wa -F auid>=1000 -F auid!=unset -F key=user-modify
+-a always,exit -F arch=b32 -F path=/etc/group -F perm=wa -F auid>=1000 -F auid!=unset -F key=group-modify
+-a always,exit -F arch=b64 -F path=/etc/group -F perm=wa -F auid>=1000 -F auid!=unset -F key=group-modify
+-a always,exit -F arch=b32 -F path=/etc/gshadow -F perm=wa -F auid>=1000 -F auid!=unset -F key=group-modify
+-a always,exit -F arch=b64 -F path=/etc/gshadow -F perm=wa -F auid>=1000 -F auid!=unset -F key=group-modify
+
+
+## Use of special rights for config changes. This would be use of setuid
+## programs that relate to user accts. This is not all setuid apps because
+## requirements are only for ones that affect system configuration.
+-a always,exit -F arch=b32 -F path=/usr/sbin/unix_chkpwd -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/sbin/unix_chkpwd -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/sbin/usernetctl -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/sbin/usernetctl -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/sbin/userhelper -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/sbin/userhelper -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/sbin/seunshare -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/sbin/seunshare -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/mount -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/mount -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/newuidmap -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/newuidmap -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/gpasswd -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/gpasswd -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/newgidmap -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/newgidmap -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/passwd -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/passwd -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/crontab -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/crontab -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/bin/at -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/bin/at -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b32 -F path=/usr/sbin/grub2-set-bootflag -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/usr/sbin/grub2-set-bootflag -F perm=x -F auid>=1000 -F auid!=unset -F key=special-config-changes
+
+## Privilege escalation via su or sudo. This is entirely handled by pam.
+## Special case for systemd-run. It is not audit aware, specifically watch it
+-a always,exit -F arch=b32 -F path=/usr/bin/systemd-run -F perm=x -F auid!=unset -F key=maybe-escalation
+-a always,exit -F arch=b64 -F path=/usr/bin/systemd-run -F perm=x -F auid!=unset -F key=maybe-escalation
+## Special case for pkexec. It is not audit aware, specifically watch it
+-a always,exit -F arch=b32 -F path=/usr/bin/pkexec -F perm=x -F key=maybe-escalation
+-a always,exit -F arch=b64 -F path=/usr/bin/pkexec -F perm=x -F key=maybe-escalation
+
+
+## Watch for configuration changes to privilege escalation.
+-a always,exit -F arch=b32 -F path=/etc/sudoers -F perm=wa -F key=special-config-changes
+-a always,exit -F arch=b64 -F path=/etc/sudoers -F perm=wa -F key=special-config-changes
+-a always,exit -F arch=b32 -F dir=/etc/sudoers.d/ -F perm=wa -F key=special-config-changes
+-a always,exit -F arch=b64 -F dir=/etc/sudoers.d/ -F perm=wa -F key=special-config-changes
+
+## Audit log access
+-a always,exit -F arch=b32 -F dir=/var/log/audit/ -F perm=r -F auid>=1000 -F auid!=unset -F key=access-audit-trail
+-a always,exit -F arch=b64 -F dir=/var/log/audit/ -F perm=r -F auid>=1000 -F auid!=unset -F key=access-audit-trail
+## Attempts to Alter Process and Session Initiation Information
+-a always,exit -F arch=b32 -F path=/var/run/utmp -F perm=wa -F auid>=1000 -F auid!=unset -F key=session
+-a always,exit -F arch=b64 -F path=/var/run/utmp -F perm=wa -F auid>=1000 -F auid!=unset -F key=session
+-a always,exit -F arch=b32 -F path=/var/log/btmp -F perm=wa -F auid>=1000 -F auid!=unset -F key=session
+-a always,exit -F arch=b64 -F path=/var/log/btmp -F perm=wa -F auid>=1000 -F auid!=unset -F key=session
+-a always,exit -F arch=b32 -F path=/var/log/wtmp -F perm=wa -F auid>=1000 -F auid!=unset -F key=session
+-a always,exit -F arch=b64 -F path=/var/log/wtmp -F perm=wa -F auid>=1000 -F auid!=unset -F key=session
+
+## Attempts to modify MAC controls
+-a always,exit -F arch=b32 -F dir=/etc/selinux/ -F perm=wa -F auid>=1000 -F auid!=unset -F key=MAC-policy
+-a always,exit -F arch=b64 -F dir=/etc/selinux/ -F perm=wa -F auid>=1000 -F auid!=unset -F key=MAC-policy
+
+## Software updates. This is entirely handled by rpm.
+
+## System start and shutdown. This is entirely handled by systemd
+
+## Kernel Module loading. This is handled in 43-module-load.rules
+
+## Application invocation. The requirements list an optional requirement
+## FPT_SRP_EXT.1 Software Restriction Policies. This event is intended to
+## state results from that policy. This would be handled entirely by
+## that daemon.
+EOF
+
+############################################################### /etc/audit/rules.d/99-finalize.rules
+cat << EOF >| /etc/audit/rules.d/99-finalize.rules
+-e 2
+EOF
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9997_debsums.chroot

@@ -0,0 +1,36 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root
+
+apt-get install --no-install-recommends debsums -y
+
+cp -a /etc/default/debsums /root/.ciss/dlb/backup/debsums.bak
+chmod 0644 /root/.ciss/dlb/backup/debsums.bak
+sed -i "s/CRON_CHECK=never/CRON_CHECK=monthly/" /etc/default/debsums
+
+if debsums -g; then
+  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ 'debsums -g' successful. \e[0m\n"
+else
+  # Omit false negative error output to stdout and stderr, as no problematic errors occur on startup.
+  printf "\e[91m++++ ++++ ++++ ++++ ++++ ++++ ++ ❌ 'debsums -g' NOT successful. \e[0m\n"  > /dev/null 2>&1
+fi
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9998_sources_list.chroot

@@ -0,0 +1,59 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+cd /root
+
+if [[ -f /etc/apt/sources.list ]]; then
+  mv /etc/apt/sources.list /root/.ciss/dlb/backup/sources.list.bak
+fi
+
+cat << 'EOF' >| /etc/apt/sources.list
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <cendev@coresecret.eu>
+# SPDX-ExternalRef: GIT https://cendev.eu/marc.weidner/CISS.2025.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <cendev@coresecret.eu>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.2025.hardened.installer framework.
+# SPDX-PackageName: CISS.2025.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+#-----------------------------------------------------------------------------------------#
+#                                  OFFICIAL DEBIAN REPOS
+#-----------------------------------------------------------------------------------------#
+
+### Debian Main Repos Bookworm
+
+deb https://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware
+deb-src https://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware
+
+deb http://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
+deb-src http://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
+
+deb https://deb.debian.org/debian/ bookworm-updates main contrib non-free non-free-firmware
+deb-src https://deb.debian.org/debian/ bookworm-updates main contrib non-free non-free-firmware
+
+deb https://deb.debian.org/debian/ bookworm-backports main contrib non-free non-free-firmware
+deb-src https://deb.debian.org/debian/ bookworm-backports main contrib non-free non-free-firmware
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
+EOF
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/hooks/live/9999_interfaces_update.chroot

@@ -0,0 +1,65 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -C -e -u -o pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+# sleep 1
+
+mv /etc/network/interfaces /root/.ciss/dlb/backup/interfaces.chroot
+rm -f /etc/network/interfaces
+
+cat << 'EOF' >| /etc/network/interfaces
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# This file describes the network interfaces available on your system
+# and how to activate them. For more information, see interfaces(5).
+
+### The loopback network interface
+auto lo
+iface lo inet loopback
+
+### Fully dynamic interface
+auto dynamic
+iface dynamic inet dhcp
+    pre-up \
+      IFACE=$(ip -o link show \
+        | awk -F': ' '{print $2}' \
+        | grep -m1 -v lo) && \
+      echo "Using interface $IFACE as dynamic" && \
+      ip link set dev "$IFACE" up && \
+      ip link set dev "$IFACE" name dynamic
+
+    post-down \
+      ip link set dev dynamic name "$IFACE" && \
+      echo "Restored interface name $IFACE"
+
+source /etc/network/interfaces.d/*
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
+EOF
+
+chmod 0644 /etc/network/interfaces
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+# sleep 1
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.binary/boot/grub/config.cfg

@@ -0,0 +1,43 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+set timeout=16
+set default=0
+
+if [ x$feature_default_font_path = xy ] ; then
+    font=unicode
+else
+    font=$prefix/unicode.pf2
+fi
+
+# Copied from the netinst image
+if loadfont $font ; then
+    set gfxmode=800x600
+    set gfxpayload=keep
+    insmod efi_gop
+    insmod efi_uga
+    insmod video_bochs
+    insmod video_cirrus
+else
+    set gfxmode=auto
+    insmod all_video
+fi
+
+insmod gfxterm
+insmod png
+
+source /boot/grub/theme.cfg
+
+terminal_output gfxterm
+
+insmod play
+play 960 440 1 0 4 440 1
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/etc/banner

@@ -0,0 +1,12 @@
+
+#######################################################################
+                 #                                              #
+                 ##                                             ##
+ ###### ######## ###  ## ######## ###  ## #######  ### #######  ###  ##
+###              #### ##    ###   ###  ##       ## ###       ## #### ##
+###      ####### #######    ###   ###  ##  ######  ###  ##   ## #######
+###      ###     ### ###    ###   ###  ##  ##  ##  ###  ##   ## ### ###
+ ######  ####### ###  ##    ###    #####   ##   ## ###   #####  ###  ##
+                       #                                              #
+#######################################################################
+

config/includes.chroot/etc/issue

@@ -0,0 +1,11 @@
+********************************************************************
+*                                                                  *
+* This system is for the use of authorized users only.  Usage of   *
+* this system may be monitored and recorded by system personnel.   *
+*                                                                  *
+* Anyone using this system expressly consents to such monitoring   *
+* and is advised that if such monitoring reveals possible          *
+* evidence of criminal activity, system personnel may provide the  *
+* evidence from such monitoring to law enforcement officials.      *
+*                                                                  *
+********************************************************************

config/includes.chroot/etc/issue.net

@@ -0,0 +1,11 @@
+********************************************************************
+*                                                                  *
+* This system is for the use of authorized users only.  Usage of   *
+* this system may be monitored and recorded by system personnel.   *
+*                                                                  *
+* Anyone using this system expressly consents to such monitoring   *
+* and is advised that if such monitoring reveals possible          *
+* evidence of criminal activity, system personnel may provide the  *
+* evidence from such monitoring to law enforcement officials.      *
+*                                                                  *
+********************************************************************

config/includes.chroot/etc/live/config.conf

@@ -0,0 +1,13 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+LIVE_CONFIGS="username"
+USERNAME=root
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/etc/modprobe.d/30-cendev-hardening.conf

@@ -0,0 +1,114 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# The kernel allows unprivileged users to indirectly cause certain modules to be loaded
+# via module auto-loading. This allows an attacker to auto-load a vulnerable module which
+# is then exploited. One such example is CVE-2017-6074, in which an attacker could trigger
+# the DCCP kernel module to be loaded by initiating a DCCP connection and then exploit a
+# vulnerability in said kernel module.
+# Specific kernel modules can be blacklisted by inserting files into /etc/modprobe.d with
+# instructions on which kernel modules to blacklist.
+
+##### Disable Uncommon Network Protocols #####
+
+install dccp /bin/true
+install sctp /bin/true
+install rds /bin/true
+install tipc /bin/true
+install n-hdlc /bin/true
+install ax25 /bin/true
+install netrom /bin/true
+install x25 /bin/true
+install rose /bin/true
+install decnet /bin/true
+install econet /bin/true
+install af_802154 /bin/true
+install ipx /bin/true
+install appletalk /bin/true
+install psnap /bin/true
+install p8023 /bin/true
+install p8022 /bin/true
+install can /bin/true
+install atm /bin/true
+
+#	DCCP      Datagram Congestion Control Protocol
+#	SCTP      Stream Control Transmission Protocol
+#	RDS       Reliable Datagram Sockets
+#	TIPC      Transparent Inter-process Communication
+#	HDLC      High-Level Data Link Control
+#	AX25      Amateur X.25
+#	NetRom
+#	X25
+#	ROSE
+#	DECnet
+#	Econet
+#	af_802154 IEEE 802.15.4
+#	IPX       Internetwork Packet Exchange
+#	AppleTalk
+#	PSNAP     Subnetwork Access Protocol
+#	p8023     Novell raw IEEE 802.3
+#	p8022     IEEE 802.2
+#	CAN       Controller Area Network
+#	ATM
+
+##### Disable Uncommon Filesystems #####
+install cramfs /bin/true
+install freevxfs /bin/true
+install jffs2 /bin/true
+install hfs /bin/true
+install hfsplus /bin/true
+install udf /bin/true
+
+blacklist cramfs
+blacklist freevxfs
+blacklist jffs2
+blacklist hfs
+blacklist hfsplus
+blacklist udf
+
+##### Disable Uncommon Network Filesystems #####
+install cifs /bin/true
+install nfs /bin/true
+install nfsv3 /bin/true
+install nfsv4 /bin/true
+install ksmbd /bin/true
+install gfs2 /bin/true
+
+blacklist cifs
+blacklist nfs
+blacklist nfsv3
+blacklist nfsv4
+blacklist ksmbd
+blacklist gfs2
+
+# The vivid driver is only useful for testing purposes and has been the cause of privilege escalation vulnerabilities, so it should be disabled.
+install vivid /bin/true
+
+##### Disable access to USB #####
+install usb_storage /bin/true
+blacklist usb-storage
+
+##### Disable access to IEEE1394 #####
+install firewire-core /bin/true
+
+##### Blacklist automatic loading of miscellaneous modules #####
+##### https://git.launchpad.net/ubuntu/+source/kmod/tree/debian/modprobe.d/blacklist.conf?h=ubuntu/disco #####
+# evbug is a debug tool that should be loaded explicitly
+blacklist evbug
+# these drivers are very simple
+blacklist usbmouse
+blacklist usbkbd
+# causes no end of confusion by creating unexpected network interfaces
+blacklist eth1394
+# ugly and loud noise, getting on everyone's nerves
+blacklist pcspkr
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/etc/network/interfaces

@@ -0,0 +1,36 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# This file describes the network interfaces available on your system
+# and how to activate them. For more information, see interfaces(5).
+
+### The loopback network interface
+auto lo
+iface lo inet loopback
+
+### Fully dynamic interface
+auto dynamic
+iface dynamic inet dhcp
+    pre-up \
+      IFACE=$(ip -o link show \
+        | awk -F': ' '{print $2}' \
+        | grep -m1 -v lo) && \
+      echo "Using interface $IFACE as dynamic" && \
+      ip link set dev "$IFACE" up && \
+      ip link set dev "$IFACE" name dynamic
+
+    post-down \
+      ip link set dev dynamic name "$IFACE" && \
+      echo "Restored interface name $IFACE"
+
+source /etc/network/interfaces.d/*
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/etc/ssh/sshd_config

@@ -0,0 +1,134 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+### Version Master V8.02.512.2025.05.30
+
+### https://www.ssh-audit.com/
+### ssh -Q cipher | cipher-auth | compression | kex | kex-gss | key | key-cert | key-plain | key-sig | mac | protocol-version | sig
+
+Include                      /etc/ssh/sshd_config.d/*.conf
+
+Protocol                     2
+
+Banner                       /etc/banner
+DebianBanner                 no
+VersionAddendum              none
+
+Compression                  no
+LogLevel                     VERBOSE
+
+AddressFamily                any
+ListenAddress                0.0.0.0
+ListenAddress                ::
+Port MUST_BE_CHANGED
+AllowUsers                   root
+UseDNS                       no
+### Force a key exchange after transferring 1 GiB of data or 1 hour of session time,
+### whichever occurs first.
+RekeyLimit                   1G 1h
+
+HostKey                      /etc/ssh/ssh_host_ed25519_key
+HostKey                      /etc/ssh/ssh_host_rsa_key
+
+PubkeyAuthentication         yes
+PermitRootLogin              prohibit-password
+PasswordAuthentication       no
+PermitEmptyPasswords         no
+StrictModes                  yes
+LoginGraceTime               2m
+MaxAuthTries                 3
+MaxSessions                  2
+### Begin randomly dropping new unauthenticated connections after the 8th attempt,
+### with a 64% chance to drop each additional connection, up to a hard limit of 16.
+MaxStartups                  08:64:16
+### Restrict each individual source IP to only 4 unauthenticated connection slot
+### in the concurrent MaxStartups pool, preventing one IP from monopolizing slots.
+PerSourceMaxStartups         4
+ClientAliveInterval          300
+ClientAliveCountMax          2
+
+AuthorizedKeysFile           %h/.ssh/authorized_keys
+
+AllowAgentForwarding         no
+AllowTcpForwarding           no
+X11Forwarding                no
+GatewayPorts                 no
+
+### A+ Rating 100/100
+RequiredRSASize              4096
+Ciphers                      aes256-gcm@openssh.com
+KexAlgorithms                sntrup761x25519-sha512@openssh.com,sntrup761x25519-sha512,gss-curve25519-sha256-
+HostKeyAlgorithms            sk-ssh-ed25519-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519@openssh.com,ssh-ed25519,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256-cert-v01@openssh.com,rsa-sha2-256
+MACs                         hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com
+CASignatureAlgorithms        rsa-sha2-512,rsa-sha2-256,ssh-ed25519,sk-ssh-ed25519@openssh.com
+GSSAPIKexAlgorithms          gss-curve25519-sha256-,gss-group16-sha512-
+HostbasedAcceptedAlgorithms  sk-ssh-ed25519-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519@openssh.com,ssh-ed25519,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256-cert-v01@openssh.com,rsa-sha2-256
+PubkeyAcceptedAlgorithms     sk-ssh-ed25519-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519@openssh.com,ssh-ed25519,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256-cert-v01@openssh.com,rsa-sha2-256
+
+### Change to yes to enable challenge-response passwords (beware issues with some PAM modules and threads)
+KbdInteractiveAuthentication no
+
+### Set this to 'yes' to enable PAM authentication, account processing,
+### and session processing. If this is enabled, PAM authentication will
+### be allowed through the ChallengeResponseAuthentication and
+### PasswordAuthentication.  Depending on your PAM configuration,
+### PAM authentication via ChallengeResponseAuthentication may bypass
+### the setting of "PermitRootLogin without-password".
+### If you just want the PAM account and session checks to run without
+### PAM authentication, then enable this but set PasswordAuthentication
+### and ChallengeResponseAuthentication to 'no'.
+UsePAM                       yes
+
+### Allow client to pass locale environment variables
+AcceptEnv                    LANG LC_*
+
+### override default of no subsystems
+Subsystem                    sftp /usr/lib/openssh/sftp-server
+
+PidFile                      /var/run/sshd.pid
+PrintMotd                    no
+PrintLastLog                 yes
+TCPKeepAlive                 no
+
+### For this to work you will also need host keys in /etc/ssh/ssh_known_hosts!
+### Change to yes if you don't trust ~/.ssh/known_hosts for HostbasedAuthentication!
+HostbasedAuthentication      no
+
+### Don't read the user's ~/.rhosts and ~/.shosts files
+# IgnoreRhosts               yes
+
+# UsePrivilegeSeparation     yes
+
+### Kerberos options
+# KerberosAuthentication     no
+# KerberosOrLocalPasswd      yes
+# KerberosTicketCleanup      yes
+# KerberosGetAFSToken        no
+
+### GSSAPI options
+# GSSAPIAuthentication       no
+# GSSAPICleanupCredentials   yes
+# GSSAPIStrictAcceptorCheck  yes
+# GSSAPIKeyExchange          no
+
+# AuthorizedPrincipalsFile   none
+# AuthorizedKeysCommand      none
+# AuthorizedKeysCommandUser  nobody
+
+# PermitTunnel               no
+# ChrootDirectory            none
+# X11DisplayOffset           10
+# X11UseLocalhost            yes
+# PermitTTY                  yes
+# PermitUserEnvironment      no
+# IgnoreUserKnownHosts       no
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf

config/includes.chroot/etc/sysctl.d/99_local.hardened

@@ -0,0 +1,328 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+### Version Master V8.02.512.2025.05.30
+
+### https://docs.kernel.org/
+### https://github.com/a13xp0p0v/kernel-hardening-checker/
+### https://kspp.github.io/
+### https://linux-audit.com/tags/kernel/
+
+###########################################################################################
+# Warning
+# Be careful not to lock yourself out of your system after a reboot due to incorrect
+# settings. For example, 'kernel.modules_disabled=1' will generally prevent the network
+# stack from being brought up after a reboot, which means NO SSH.
+###########################################################################################
+
+##### Linux Kernel #####
+
+### Disable loading new modules. Be careful with using this option!
+kernel.modules_disabled=1
+
+### Restricting access to kernel pointers.
+kernel.kptr_restrict=2
+
+### Restricting access to kernel logs.
+kernel.dmesg_restrict=1
+
+###########################################################################################
+# Despite the value of dmesg_restrict, the kernel log will still be displayed in the
+# console during boot.
+# This option prevents those information leaks.
+###########################################################################################
+kernel.printk=3 3 3 3
+
+### Restricting eBPF to the CAP_BPF capability
+kernel.unprivileged_bpf_disabled=1
+net.core.bpf_jit_harden=2
+
+### Restricting loading TTY line disciplines to the CAP_SYS_MODULE capability
+dev.tty.ldisc_autoload=0
+
+###########################################################################################
+# The userfaultfd() syscall is often abused to exploit use-after-free flaws.
+# This sysctl is used to restrict this syscall to the CAP_SYS_PTRACE capability.
+###########################################################################################
+vm.unprivileged_userfaultfd=0
+
+###########################################################################################
+# kexec is a system call that is used to boot another kernel during runtime.
+# This functionality can be abused to load a malicious kernel and gain arbitrary code
+# execution in kernel mode, so this sysctl disables it.
+###########################################################################################
+kernel.kexec_load_disabled=1
+
+###########################################################################################
+# Prevents unprivileged users from creating their own user namespaces, potentially
+# enabling exploits. This is a good additional safeguard.
+###########################################################################################
+kernel.unprivileged_userns_clone=0
+
+###########################################################################################
+# The SysRq key exposes a lot of potentially dangerous debugging functionality to
+# unprivileged users. You can set the value to 0 to disable SysRq completely.
+###########################################################################################
+kernel.sysrq=0
+
+### Randomize memory space.
+kernel.randomize_va_space=2
+
+###########################################################################################
+# These prevent creating files in potentially attacker-controlled environments, such as
+# world-writable directories.
+###########################################################################################
+fs.protected_fifos=2
+fs.protected_regular=2
+
+###########################################################################################
+# This only permits symlinks to be followed when outside a world-writable sticky directory,
+# when the owner of the symlink and follower match or when the directory owner matches the
+# symlink's owner.
+###########################################################################################
+fs.protected_symlinks=1
+fs.protected_hardlinks=1
+
+###########################################################################################
+# ptrace is a system call that allows a program to alter and inspect another running
+# process, which allows attackers to trivially modify the memory of other running programs.
+# 0 - classic ptrace permissions:
+# a process can PTRACE_ATTACH to any other process running under the same uid,
+# as long as it is dumpable (i.e., did not transition uids,
+# start privileged, or have called prctl(PR_SET_DUMPABLE...) already).
+# Similarly, PTRACE_TRACEME is unchanged.
+#
+# 1 - restricted ptrace:
+# a process must have a predefined relationship with the inferior it wants to call
+# PTRACE_ATTACH on. By default, this relationship is that of only its descendants when the
+# above classic criteria is also met. To change the relationship, an inferior can call
+# prctl(PR_SET_PTRACER, debugger, ...) to declare an allowed debugger PID to call
+# PTRACE_ATTACH on the inferior. Using PTRACE_TRACEME is unchanged.
+#
+# 2 - admin-only attach:
+# only processes with CAP_SYS_PTRACE may use ptrace, either with PTRACE_ATTACH or through
+# children calling PTRACE_TRACEME.
+#
+# 3 - no attach:
+# no processes may use ptrace with PTRACE_ATTACH nor via PTRACE_TRACEME. Once set, this
+# sysctl value cannot be changed.
+###########################################################################################
+kernel.yama.ptrace_scope=2
+
+### Use filename based on core_pattern value
+kernel.core_uses_pid=1
+
+###########################################################################################
+# Performance events add considerable kernel attack surface and have caused abundant
+# vulnerabilities. Be careful ! Performance might be affected ! Here turned off by default.
+###########################################################################################
+#kernel.perf_event_paranoid=2
+
+###########################################################################################
+# ASLR is a common exploit mitigation that randomizes the position of critical parts of a
+# process in memory. This can make a wide variety of exploits harder to pull off, as they
+# first require an information leak. The above settings increase the bits of entropy used
+# for mmap ASLR, improving its effectiveness. The values of these sysctls must be set in
+# relation to the CPU architecture. The above values are compatible with x86, but other
+# architectures may differ.
+###########################################################################################
+vm.mmap_rnd_bits=32
+vm.mmap_rnd_compat_bits=16
+
+###########################################################################################
+# In addition to ASLR hardening, one could adjust the behavior for memory overbooking.
+# Determines how the kernel provides the available memory for processes:
+# - 0 (default): kernel decides heuristically whether memory allocations are allowed.
+# - 1: Memory is always allocated, even if it is not physically available; can lead to
+#      out-of-memory errors.
+# - 2: The kernel only allows memory allocations up to the available physical memory + swap
+#      (safe mode).
+#vm.overcommit_memory=2
+#   Specifies how much of the available physical memory (plus swap) can be made available
+#   for memory allocations when vm.overcommit_memory=2 is active.
+# The value is a percentage.
+# 50: Up to 50% of the physical memory can be reserved for memory-intensive applications.
+###########################################################################################
+#vm.overcommit_ratio=50
+
+###########################################################################################
+# Reduces the likelihood of important data remaining unsecured in RAM for too long.
+# Specifies the percentage of the total memory that can be filled with changed (dirty) data
+# before it is written to the permanent memory (e.g., the hard disk).
+# 15: If 15% of the RAM is occupied by dirty pages, a background flush process is triggered
+# to write this data.
+#vm.dirty_ratio=15
+# Specifies the percentage of total memory at which the kernel starts writing dirty pages
+# in the background before the dirty_ratio threshold is reached.
+# 5: The kernel starts writing data in the background when 5% of RAM is occupied with
+# dirty pages.
+###########################################################################################
+#vm.dirty_background_ratio=5
+
+###########################################################################################
+# Similar to core dumps, swapping or paging copies parts of memory to disk, which can
+# contain sensitive information. The kernel should be configured to only swap if absolutely
+# necessary.
+###########################################################################################
+#vm.swappiness=1
+  ### This setting minimizes swapping, which is useful for servers.
+  ### However, one could also consider vm.swappiness=0 if enough RAM is available.
+  # vm.swappiness=0
+
+###########################################################################################
+# Process that runs with elevated privileges may still dump their memory even after these
+# settings.
+###########################################################################################
+fs.suid_dumpable=0
+kernel.core_pattern= | /bin/false
+
+### Disable User Namespaces, as it opens up a large attack surface to unprivileged users.
+#user.max_user_namespaces=0
+
+###########################################################################################
+# Reboot after even 1 WARN or BUG/Oops. Adjust for your tolerances. (Since v6.2)
+# If you want to set oops_limit greater than one, you will need to disable
+# CONFIG_PANIC_ON_OOPS.
+###########################################################################################
+kernel.warn_limit=1
+kernel.oops_limit=1
+
+###########################################################################################
+# Disable TIOCSTI, which is used to inject keypresses.
+# (This will, however, break screen readers.)
+###########################################################################################
+dev.tty.legacy_tiocsti=0
+
+###########################################################################################
+# IO_uring has yielded some security concerns and vulnerabilities,
+# particularly for those sticking to older versions of the Linux kernel.
+# There have also been IO_uring integration issues with the Linux security subsystem.
+###########################################################################################
+#kernel.io_uring_disabled=2
+
+##### Network Stack #####
+
+### Disable IP source routing, we are not a router:
+net.ipv4.conf.all.accept_source_route=0
+net.ipv4.conf.default.accept_source_route=0
+net.ipv6.conf.all.accept_source_route=0
+net.ipv6.conf.default.accept_source_route=0
+
+###########################################################################################
+# This setting makes your system ignore all ICMP requests to avoid Smurf attacks, make
+# the device more difficult to enumerate on the network and prevent clock fingerprinting
+# through ICMP timestamps.
+###########################################################################################
+net.ipv4.icmp_echo_ignore_all=1
+
+### Enable ignoring broadcast request.
+net.ipv4.icmp_echo_ignore_broadcasts=1
+
+### This helps protect against SYN flood attacks
+net.ipv4.tcp_syncookies=1
+
+###########################################################################################
+# This protects against time-wait assassination by dropping RST packets for sockets in
+# the time-wait state.
+###########################################################################################
+net.ipv4.tcp_rfc1337=1
+
+###########################################################################################
+# These enable source validation of packets received from all interfaces of the machine.
+# This protects against IP spoofing, in which an attacker sends a packet with a fraudulent
+# IP address.
+###########################################################################################
+net.ipv4.conf.all.rp_filter=1
+net.ipv4.conf.default.rp_filter=1
+
+###########################################################################################
+# This disables ICMP redirect acceptance and sending to prevent man-in-the-middle attacks
+# and minimize information disclosure.
+###########################################################################################
+net.ipv4.conf.all.accept_redirects=0
+net.ipv4.conf.default.accept_redirects=0
+net.ipv4.conf.all.secure_redirects=0
+net.ipv4.conf.default.secure_redirects=0
+net.ipv6.conf.all.accept_redirects=0
+net.ipv6.conf.default.accept_redirects=0
+net.ipv4.conf.all.send_redirects=0
+net.ipv4.conf.default.send_redirects=0
+
+###########################################################################################
+# A martian packet is a packet with a source address, which is obviously wrong -
+# nothing could possibly be routed back to that address.
+###########################################################################################
+net.ipv4.conf.all.log_martians=1
+net.ipv4.conf.default.log_martians=1
+
+###########################################################################################
+# Deactivates IP forwarding. This means that the system discards packets that are not
+# intended for its own IP addresses. It therefore does not act as a router and does not
+# forward data packets between network interfaces.
+###########################################################################################
+net.ipv4.conf.all.forwarding=0
+
+###########################################################################################
+# Disabling RA prevents the system from receiving routing information from potentially
+# insecure or compromised routers. This is particularly important for servers that use
+# static network configurations and should not dynamically accept new IPv6 routes or
+# prefixes. An attacker could otherwise use forged RA messages to change the network route
+# and redirect traffic, for example.
+###########################################################################################
+net.ipv6.conf.all.accept_ra=0
+net.ipv6.conf.default.accept_ra=0
+
+###########################################################################################
+# These parameters relate to secure ICMP redirects. ICMP redirects are messages that a
+# router sends to a device to inform it that there is a better route for the data traffic.
+# This setting prevents the system from responding to redirects that have been spoofed by
+# potential attackers to redirect traffic (e.g., for man-in-the-middle attacks).
+###########################################################################################
+net.ipv4.conf.all.secure_redirects=1
+net.ipv4.conf.default.secure_redirects=1
+
+###########################################################################################
+# This setting prevents the disclosure of TCP timestamps that can be used for system
+# fingerprinting:
+###########################################################################################
+net.ipv4.tcp_timestamps=0
+
+###########################################################################################
+# To make ARP spoofing attacks more difficult. Defines how the system responds to ARP
+# requests.
+# - 0 (default): Responds to every request, including IPs configured on other interfaces.
+# - 1: Only responds to requests that are specifically intended for the IP of the
+#      respective interface. Increases security by preventing ARP spoofing attacks, as the
+#      system does not send unnecessary ARP responses.
+###########################################################################################
+net.ipv4.conf.all.arp_ignore=1
+net.ipv4.conf.default.arp_ignore=1
+
+###########################################################################################
+# To minimize attacks on half-open connections.
+# Specifies the maximum number of connection requests (SYN packets)
+# that can be held in the connection establishment state (SYN_RECV) in the queue.
+# 4096: A generous queue to better intercept SYN flood attacks.
+# Useful for systems with high network traffic, or if protection against DoS attacks
+# needs to be improved:
+###########################################################################################
+net.ipv4.tcp_max_syn_backlog=4096
+
+###########################################################################################
+# Specifies the maximum number of SYN/ACK retries before the connection is aborted:
+# 2: The kernel will only send a SYN/ACK twice before dropping the connection.
+# Reduces the time and effort wasted on inactive connection requests.
+# This improves performance and protects against SYN flood attacks, but could cause
+# problems on poor networks.
+###########################################################################################
+net.ipv4.tcp_synack_retries=2
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/etc/systemd/system/getty@tty1.service.d/override.conf

@@ -0,0 +1,14 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+[Service]
+ExecStart=
+ExecStart=-/sbin/agetty --autologin root --noclear %I $TERM
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.ash/0_di_preseed_include_command.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# No bash in the installer environment, only BusyBox.
+
+set -o errexit
+set -o nounset
+set -o noclobber
+
+export PATH="${PATH}:/sbin:/usr/sbin:/.ciss/install:/.ciss/install/.ash"
+
+echo '152.53.35.74 coresecret.eu' >> /etc/hosts
+
+touch /tmp/late-command-script
+chmod 0700 /tmp/late-command-script
+
+.  /.ciss/install/.ash/di_scripting_flexibility.sh
+
+sh /.ciss/install/.ash/di_scripting_password.sh
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.ash/1_di_preseed_early_command.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# No bash in the installer environment, only BusyBox.
+
+set -o errexit
+set -o nounset
+set -o noclobber
+
+export PATH="${PATH}:/sbin:/usr/sbin:/.ciss/install:/.ciss/install/.ash"
+
+. /.ciss/install/.ash/di_scripting_flexibility.sh
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.ash/2_di_partman_early_command.sh

@@ -0,0 +1,415 @@
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# No bash in the installer environment, only BusyBox.
+
+set -o errexit
+set -o nounset
+set -o noclobber
+
+export PATH="${PATH}:/sbin:/usr/sbin:/.ciss/install:/.ciss/install/.ash"
+. /.ciss/install/.ash/di_scripting_flexibility.sh
+
+readonly DISK_NAME="sda"
+readonly DISK_PATH="/dev/${DISK_NAME}"
+readonly SLEEPTIMER="2"
+
+do_sleep() {
+  sleep "${SLEEPTIMER}"
+}
+
+modprobe btrfs || true
+modprobe ext4 || true
+
+blkdiscard "${DISK_PATH}"
+parted "${DISK_PATH}" --script -- mklabel gpt
+
+#/dev/sda1 -- ESP
+do_dev_sda1() {
+  parted "${DISK_PATH}" --script -- mkpart ESP fat32 1MiB 512MiB set 1 esp on
+  do_sleep
+
+  FORMAT_LABEL="ESP"
+  PARTITION="${DISK_PATH}1"
+
+  format_partition() {
+    if mkfs.fat -F32 -n "${FORMAT_LABEL}" "${PARTITION}"; then
+      echo "Partition: ${PARTITION} successfully formatted with FAT32."
+    else
+      echo "Partition: ${PARTITION} NOT successfully formated with FAT32."
+    fi
+
+    if blkid "${PARTITION}" | grep -q 'TYPE="vfat"'; then
+      echo "Partition: ${PARTITION} correctly formatted with FAT32."
+    else
+      echo "Partition: ${PARTITION} NOT correctly formatted with FAT32."
+    fi
+  }
+
+  ATTEMPTS=0
+  MAX_ATTEMPTS=3
+  while ! format_partition && [ ${ATTEMPTS} -lt ${MAX_ATTEMPTS} ]; do
+    echo "Repeat formatting... attempt $((ATTEMPTS + 1))"
+    ATTEMPTS=$((ATTEMPTS + 1))
+  done
+
+  if [ ${ATTEMPTS} -ge ${MAX_ATTEMPTS} ]; then
+    echo "Error: Partition ${PARTITION} could not be formatted correctly after ${MAX_ATTEMPTS} attempts."
+  else
+    echo "Partition ${PARTITION} successfully formatted and checked."
+  fi
+}
+do_dev_sda1
+
+#/dev/sda2 -- /boot
+do_dev_sda2() {
+  parted "${DISK_PATH}" --script -- mkpart primary ext4 512MiB 4096MiB
+  do_sleep
+
+  FORMAT_LABEL="boot"
+  PARTITION="${DISK_PATH}2"
+
+  format_partition() {
+    if mkfs.ext4 -L "${FORMAT_LABEL}" "${PARTITION}"; then
+      echo "Partition: ${PARTITION} successfully formatted with ext4."
+    else
+      echo "Partition: ${PARTITION} NOT successfully formated with ext4."
+    fi
+
+    if blkid "${PARTITION}" | grep -q 'TYPE="ext4"'; then
+      echo "Partition: ${PARTITION} correctly formatted with ext4."
+    else
+      echo "Partition: ${PARTITION} NOT correctly formatted with ext4."
+    fi
+  }
+
+  ATTEMPTS=0
+  MAX_ATTEMPTS=3
+  while ! format_partition && [ ${ATTEMPTS} -lt ${MAX_ATTEMPTS} ]; do
+    echo "Repeat formatting... attempt $((ATTEMPTS + 1))"
+    ATTEMPTS=$((ATTEMPTS + 1))
+  done
+
+  if [ ${ATTEMPTS} -ge ${MAX_ATTEMPTS} ]; then
+    echo "Error: Partition ${PARTITION} could not be formatted correctly after ${MAX_ATTEMPTS} attempts."
+  else
+    echo "Partition ${PARTITION} successfully formatted and checked."
+  fi
+}
+do_dev_sda2
+
+#/dev/sda3 -- preparing for crypt_ephemeral_swap
+parted "${DISK_PATH}" --script -- mkpart primary 4096MiB 8192MiB
+do_sleep
+
+#/dev/sda4 -- preparing for crypt_ephemeral_tmp
+parted "${DISK_PATH}" --script -- mkpart primary 8192MiB 12288MiB
+do_sleep
+
+#/dev/sda5 -- /home
+parted "${DISK_PATH}" --script -- mkpart primary 12288MiB 45056MiB
+do_sleep
+
+#/dev/sda6 -- /
+parted "${DISK_PATH}" --script -- mkpart primary 45056MiB 77824MiB
+do_sleep
+
+#/dev/sda7 -- /usr
+parted "${DISK_PATH}" --script -- mkpart primary 77824MiB 143360MiB
+do_sleep
+
+#/dev/sda8 -- /var
+parted "${DISK_PATH}" --script -- mkpart primary 143360MiB 208896MiB
+do_sleep
+
+#/dev/sda9 -- /var/log
+parted "${DISK_PATH}" --script -- mkpart primary 208896MiB 225280MiB
+do_sleep
+
+#/dev/sda10 -- /var/log/audit
+parted "${DISK_PATH}" --script -- mkpart primary 225280MiB 241664MiB
+do_sleep
+
+#/dev/sda11 -- /var/tmp
+parted "${DISK_PATH}" --script -- mkpart primary 241664MiB 258048MiB
+do_sleep
+
+#/dev/sda12 -- temporary installation /tmp
+do_dev_sda12() {
+  parted "${DISK_PATH}" --script -- mkpart primary 258048MiB 261120MiB
+  do_sleep
+
+  FORMAT_LABEL="installation_tmp"
+  PARTITION="${DISK_PATH}12"
+
+  format_partition() {
+    if mkfs.ext4 -L "${FORMAT_LABEL}" "${PARTITION}"; then
+      echo "Partition: ${PARTITION} successfully formatted with ext4."
+    else
+      echo "Partition: ${PARTITION} NOT successfully formated with ext4."
+    fi
+
+    if blkid "${PARTITION}" | grep -q 'TYPE="ext4"'; then
+      echo "Partition: ${PARTITION} correctly formatted with ext4."
+    else
+      echo "Partition: ${PARTITION} NOT correctly formatted with ext4."
+    fi
+  }
+
+  ATTEMPTS=0
+  MAX_ATTEMPTS=3
+  while ! format_partition && [ ${ATTEMPTS} -lt ${MAX_ATTEMPTS} ]; do
+    echo "Repeat formatting... attempt $((ATTEMPTS + 1))"
+    ATTEMPTS=$((ATTEMPTS + 1))
+  done
+
+  if [ ${ATTEMPTS} -ge ${MAX_ATTEMPTS} ]; then
+    echo "Error: Partition ${PARTITION} could not be formatted correctly after ${MAX_ATTEMPTS} attempts."
+  else
+    echo "Partition ${PARTITION} successfully formatted and checked."
+  fi
+}
+do_dev_sda12
+
+# Encrypt and open /dev/sda5 to /dev/sda11
+i=5
+while [ "${i}" -lt 12 ]; do
+  PARTITION="/dev/${DISK_NAME}${i}"
+  MAPPER_NAME="crypt_${DISK_NAME}${i}"
+
+  if cryptsetup luksFormat "${PARTITION}" --key-file=/.ciss/install/.cfg/.password.cfg --batch-mode --type luks2 --cipher aes-xts-plain64 --key-size 512 --hash sha512 --iter-time 3000 --use-random --verbose; then
+    echo  "Partition: ${PARTITION} successfully encrypted."
+    do_sleep
+
+    if cryptsetup open "${PARTITION}" "${MAPPER_NAME}" --key-file=/.ciss/install/.cfg/.password.cfg; then
+      echo  "Partition: ${PARTITION} successfully opened as: ${MAPPER_NAME}."
+
+      if mkfs.btrfs -L "${MAPPER_NAME}" /dev/mapper/"${MAPPER_NAME}"; then
+        echo  "Partition: ${PARTITION} successfully formatted."
+      else
+        echo  "Partition: ${PARTITION} NOT successfully formatted."
+      fi
+
+    else
+      echo  "Partition: ${PARTITION} NOT successfully opened as: ${MAPPER_NAME}."
+    fi
+
+  else
+    echo  "Partition: ${PARTITION} NOT successfully encrypted."
+  fi
+
+  i=$((i + 1))
+done
+
+do_sleep
+
+# Generate /target directories-
+FILE_DIR="/.ciss/install/.cfg/.directories.cfg"
+
+# Check that the file exists.
+if [ ! -f "${FILE_DIR}" ]; then
+  echo "Error: File ${FILE_DIR} cannot be read." >&2
+  exit 1
+fi
+
+while read -r DIR; do
+  sleep 1
+  # Proceed only if the row is not empty.
+  if [ -n "${DIR}" ]; then
+    # Verify if the directory already exists.
+    if [ -d "${DIR}" ]; then
+      echo "Directory ${DIR} already exists."
+    else
+      # Try to create a directory.
+      until [ -d "${DIR}" ]; do
+        mkdir -p "${DIR}"
+        if [ ! -d "${DIR}" ]; then
+          echo "Error: Creating ${DIR} directory failed. Try again. " >&2
+          sleep 1
+        fi
+      done
+      echo "Directory ${DIR} created successfully".
+    fi
+  fi
+done < "${FILE_DIR}"
+
+do_sleep
+
+mount /dev/mapper/crypt_sda6 /target
+do_sleep
+
+mkdir /target/boot
+mount /dev/sda2 /target/boot
+do_sleep
+
+mkdir /target/boot/efi
+mount /dev/sda1 /target/boot/efi
+do_sleep
+
+mkdir /target/home
+mount /dev/mapper/crypt_sda5 /target/home
+do_sleep
+
+mkdir /target/usr
+mount /dev/mapper/crypt_sda7 /target/usr
+do_sleep
+
+mkdir /target/var
+mount /dev/mapper/crypt_sda8 /target/var
+do_sleep
+
+mkdir /target/var/log
+mount /dev/mapper/crypt_sda9 /target/var/log
+do_sleep
+
+mkdir /target/var/log/audit
+mount /dev/mapper/crypt_sda10 /target/var/log/audit
+do_sleep
+
+mkdir /target/var/tmp
+mount /dev/mapper/crypt_sda11 /target/var/tmp
+do_sleep
+
+mkdir /target/tmp
+mount /dev/sda12 /target/tmp
+do_sleep
+
+mkdir /target/dev
+mount --bind /dev /target/dev
+do_sleep
+if [ -d "/target/dev/pts" ]; then
+  echo "Directory /target/dev/pts already exists."
+else
+  mkdir /target/dev/pts
+fi
+
+mkdir /target/proc
+mount --bind /proc /target/proc
+do_sleep
+
+mkdir /target/sys
+mount --bind /sys /target/sys
+do_sleep
+
+mkdir /target/run
+mount --bind /run /target/run
+do_sleep
+if [ -d "/target/run/lock" ]; then
+  echo "Directory /target/run/lock already exists."
+else
+  mkdir /target/run/lock
+fi
+
+mkdir /target/etc
+mkdir /target/etc/apt
+mkdir /target/etc/network
+touch /target/etc/fstab
+chmod 0644 /target/etc/fstab
+
+# shellcheck disable=SC2129
+cat << EOF >> /target/etc/fstab
+# /etc/fstab: static file system information.
+#
+# Use 'blkid' to print the universally unique identifier for a
+# device; this may be used with UUID= as a more robust way to name devices
+# that works even if disks are added and removed. See fstab(5).
+#
+# systemd generates mount units based on this file, see systemd.mount(5).
+# Please run 'systemctl daemon-reload' after making changes here.
+#
+# <file system> <mount point>   <type>  <options>       <dump>  <pass>
+
+EOF
+
+echo "# / was on /dev/mapper/crypt_sda6 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda6) / btrfs defaults,errors=remount-ro 0 1" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /boot was on /dev/sda2 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/sda2) /boot ext4 defaults 0 2" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /boot/efi was on /dev/sda1 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/sda1) /boot/efi vfat umask=0077 0 1" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /home was on /dev/mapper/crypt_sda5 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda5) /home btrfs defaults 0 2" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /usr was on /dev/mapper/crypt_sda7 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda7) /usr btrfs defaults 0 2" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /var was on /dev/mapper/crypt_sda8 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda8) /var btrfs defaults 0 2" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /var/log was on /dev/mapper/crypt_sda9 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda9) /var/log btrfs defaults 0 2" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /var/log/audit was on /dev/mapper/crypt_sda10 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda10) /var/log/audit btrfs defaults 0 2" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /var/tmp was on /dev/mapper/crypt_sda11 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda11) /var/tmp btrfs defaults 0 2" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /tmp was on /dev/sda12 during installation" >> /target/etc/fstab
+echo "UUID=$(blkid -s UUID -o value /dev/sda12) /tmp ext4 defaults 0 2" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+echo "# /media/cdrom0 was on /dev/sr0 during installation" >> /target/etc/fstab
+echo "/dev/sr0        /media/cdrom0   udf,iso9660 user,noauto     0       0" >> /target/etc/fstab
+echo "" >> /target/etc/fstab
+
+touch /target/etc/crypttab
+chmod 0644 /target/etc/crypttab
+
+# shellcheck disable=SC2129
+cat << EOF >> /target/etc/crypttab
+# <name>  <device>  <password-file-or-none>  <options>
+
+EOF
+
+echo "# / was on /dev/mapper/crypt_sda6 during installation" >> /target/etc/crypttab
+echo "crypt_sda6 UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda6) none luks,discard" >> /target/etc/crypttab
+echo "" >> /target/etc/crypttab
+
+echo "# /home was on /dev/mapper/crypt_sda5 during installation" >> /target/etc/crypttab
+echo "crypt_sda5 UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda5) none luks,discard" >> /target/etc/crypttab
+echo "" >> /target/etc/crypttab
+
+echo "# /usr was on /dev/mapper/crypt_sda7 during installation" >> /target/etc/crypttab
+echo "crypt_sda7 UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda7) none luks,discard" >> /target/etc/crypttab
+echo "" >> /target/etc/crypttab
+
+echo "# /var was on /dev/mapper/crypt_sda8 during installation" >> /target/etc/crypttab
+echo "crypt_sda8 UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda8) none luks,discard" >> /target/etc/crypttab
+echo "" >> /target/etc/crypttab
+
+echo "# /var/log was on /dev/mapper/crypt_sda9 during installation" >> /target/etc/crypttab
+echo "crypt_sda9 UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda9) none luks,discard" >> /target/etc/crypttab
+echo "" >> /target/etc/crypttab
+
+echo "# /var/log/audit was on /dev/mapper/crypt_sda10 during installation" >> /target/etc/crypttab
+echo "crypt_sda10 UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda10) none luks,discard" >> /target/etc/crypttab
+echo "" >> /target/etc/crypttab
+
+echo "# /var/tmp was on /dev/mapper/crypt_sda11 during installation" >> /target/etc/crypttab
+echo "crypt_sda11 UUID=$(blkid -s UUID -o value /dev/mapper/crypt_sda11) none luks,discard" >> /target/etc/crypttab
+echo "" >> /target/etc/crypttab
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.ash/3_di_preseed_late_command.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# No bash in the installer environment, only BusyBox.
+
+set -o errexit
+set -o nounset
+set -o noclobber
+
+export PATH="${PATH}:/sbin:/usr/sbin:/.ciss/install:/.ciss/install/.ash"
+
+. /.ciss/install/.ash/di_scripting_flexibility.sh
+
+mkdir -m 0700 /target/root/.d-i-backup
+
+if [ -f /tmp/late-command-script ]; then
+  sh /tmp/late-command-script
+fi
+
+sh /.ciss/install/.ash/di_scripting_ssh.sh
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.ash/di_scripting_flexibility.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# No bash in the installer environment, only BusyBox.
+
+set -o errexit
+set -o nounset
+set -o noclobber
+
+readonly     RED="\033[91m"
+                             export RED
+readonly   GREEN="\033[92m"
+                             export GREEN
+readonly  YELLOW="\033[93m"
+                             export YELLOW
+readonly    BLUE="\033[94m"
+                             export BLUE
+readonly MAGENTA="\033[95m"
+                             export MAGENTA
+readonly    CYAN="\033[96m"
+                             export CYAN
+readonly   WHITE="\033[97m"
+                             export WHITE
+readonly  NORMAL="\033[0m"
+                             export NORMAL
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.ash/di_scripting_password.sh

@@ -0,0 +1,93 @@
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# No bash in the installer environment, only BusyBox.
+
+set -o errexit
+set -o nounset
+set -o noclobber
+
+# Create a passphrase by pulling only characters in the range '!' to '~' (ASCII 0x21 to 0x7e) from /dev/random.
+umask 0077
+TMP_PASSPHRASE_FILE=$(mktemp)
+readonly TMP_PASSPHRASE_FILE
+grep -o '[!-~]' /dev/urandom | tr -d '\n' | head -c64 >> "${TMP_PASSPHRASE_FILE}"
+
+# Create an include file for debian-installer with the passphrase as answers to the questions.
+DEB_INSTALLER_CRYPT_INC_FILE=$(mktemp)
+readonly DEB_INSTALLER_CRYPT_INC_FILE
+
+# Read the first line (the passphrase) – POSIX-compliant
+# IFS= prevents leading/trailing spaces from being truncated,
+# -r ensures that backslashes are not interpreted.
+IFS= read -r passphrase < "${TMP_PASSPHRASE_FILE}"
+
+# A single printf call with exactly one redirect
+# – ShellCheck-compliant and valid in POSIX-sh
+printf 'd-i partman-crypto/passphrase string %s\n' "${passphrase}" >> "$DEB_INSTALLER_CRYPT_INC_FILE"
+
+printf 'd-i partman-crypto/passphrase-again string %s\n' "${passphrase}" >> "$DEB_INSTALLER_CRYPT_INC_FILE"
+
+# Echo the file to be included, so debian-installer will do that - assuming this command is being run via 'preseed/include_command'.
+# Without file:// will try and fetch from the webserver this preseed was served from.
+echo "file://${DEB_INSTALLER_CRYPT_INC_FILE}"
+
+# Add extra commands to the file that should be run using 'preseed/late_command' to ensure the passphrase is included in the new installation.
+readonly IN_TARGET_KEY_FILE=/etc/keys/luks-lvm.key
+
+cat - >> /tmp/late-command-script << LATE_EOF
+##### BEGIN ADDED BY preseed-crypto-key preseed/include_command
+
+umask 0077
+
+mkdir -p /target$(dirname "${IN_TARGET_KEY_FILE}")
+
+cp "${TMP_PASSPHRASE_FILE}" /target"${IN_TARGET_KEY_FILE}"
+
+# Use /root as /tmp might be noexec
+
+cat - >/target/root/configure-crypt-unlock <<EOF
+#!/usr/bin/bash
+
+# Standard bash safety features
+set -eufo pipefail
+
+if grep -q UMASK /etc/initramfs-tools/initramfs.conf
+then
+  sed -i 's-^#\?UMASK.*\\\$-UMASK=0077-' /etc/initramfs-tools/initramfs.conf
+else
+  echo -e "# Secure initramfs while it contains unlock keys for root filesystem\nUMASK=0077" >>/etc/initramfs-tools/initramfs.conf
+fi
+
+# Include keyfile in initramfs
+sed -i 's-^#\?KEYFILE_PATTERN=.*\\\$-KEYFILE_PATTERN=$(dirname ${IN_TARGET_KEY_FILE})/*.key-' /etc/cryptsetup-initramfs/conf-hook
+
+# Configure crypt to use keyfile to unlock encrypted partition(s)
+sed -i 's#\(UUID=[^ ]\+\) none#\1 ${IN_TARGET_KEY_FILE}#' /etc/crypttab
+
+# Update initramfs with key file
+update-initramfs -u
+exit 0
+EOF
+
+sleep 1
+
+chmod 500 /target/root/configure-crypt-unlock
+in-target /root/configure-crypt-unlock
+rm /target/root/configure-crypt-unlock
+
+exit 0
+##### END ADDED BY preseed-crypto-key preseed/include_command
+LATE_EOF
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.ash/di_scripting_ssh.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+# No bash in the installer environment, only BusyBox.
+
+set -o errexit
+set -o nounset
+set -o noclobber
+
+if [ ! -d /target/root/.ssh ]; then
+  mkdir -m 0700 /target/root/.ssh
+fi
+
+if [ -f /target/etc/ssh/ssh_host_ed25519_key ]; then
+  rm -f /target/etc/ssh/ssh_host_ed25519_key
+fi
+
+if [ -f /target/etc/ssh/ssh_host_rsa_key ]; then
+  rm -f /target/etc/ssh/ssh_host_rsa_key
+fi
+
+in-target ssh-keygen -o -a 1024 -N "" -t ed25519 -f /etc/ssh/ssh_host_ed25519_key -C "root d-i $(date -I)"
+in-target ssh-keygen -o -a 1024 -N "" -t rsa -b 4096 -f /etc/ssh/ssh_host_rsa_key -C "root d-i $(date -I)"
+
+cp -a /target/etc/ssh/sshd_config /target/root/.d-i-backup/sshd_config.bak
+rm -f /target/etc/ssh/sshd_config
+
+cp /cdrom/install/.lib/sshd_config.lib /target/etc/ssh/sshd_config
+chmod 0600 /target/etc/ssh/sshd_config
+
+sed -i "s/Port					22/Port					37768/" /target/etc/ssh/sshd_config
+sed -i "s/AllowUsers				DUMMYSTRING/AllowUsers				root/" /target/etc/ssh/sshd_config
+
+cp /cdrom/install/.lib/banner.lib /target/etc/banner
+chmod 0644 /target/etc/banner
+
+umask 0077
+wget --https-only --secure-protocol=TLSv1_3 -c -O /target/root/.ssh/authorized_keys https://coresecret.eu/download/developer/2024_rsa4096_developer_root.pub.key
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/.directories.cfg

@@ -0,0 +1,32 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+/target
+/target/boot
+/target/boot/efi
+/target/etc
+/target/etc/apt
+/target/etc/network
+/target/dev
+/target/dev/pts
+/target/home
+/target/proc
+/target/root
+/target/run
+/target/run/lock
+/target/sys
+/target/usr
+/target/var
+/target/var/log
+/target/var/log/audit
+/target/var/log/ciss
+/target/var/tmp
+/target/tmp
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/apt.cfg

@@ -0,0 +1,78 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# apt settings                                                                            #
+###########################################################################################
+# Choose, if you want to scan additional installation media (default: false):
+d-i apt-setup/cdrom/set-first boolean false
+
+# By default source repositories are listed in /etc/apt/sources.list:
+d-i apt-setup/enable-source-repositories boolean true
+
+# A network mirror can be used to supplement the software that is not included on the
+# installation media. This may also make newer versions of software available:
+d-i apt-setup/use_mirror boolean true
+
+# Uncomment the following line, if you don't want to have the sources.list entry for a
+# DVD/BD installation image active in the installed system:
+d-i apt-setup/disable-cdrom-entries boolean true
+
+# You can choose to install non-free firmware:
+d-i apt-setup/non-free-firmware boolean true
+
+# You can choose to install non-free and contrib software:
+d-i apt-setup/non-free boolean true
+d-i apt-setup/contrib boolean true
+
+# Debian has two services that provide updates to releases:
+#
+#  security and release updates.
+#  .
+#  Security updates help to keep your system secured against attacks.
+#  Enabling this service is strongly recommended.
+#  .
+#  Release updates provide more current versions for software that changes relatively
+#  frequently and where not having the latest version could reduce the usability of the
+#  software. It also provides regression fixes. This service is only available for stable
+#  and oldstable releases.
+#  .
+#  Backported software are adapted from the development version to work with this release.
+#  Although this software has not gone through such complete testing as that contained in
+#  the release, it includes newer versions of some applications which may provide useful
+#  features. Enabling backports here does not cause any of them to be installed by default;
+#  it only allows you to manually select backports to use.
+#  https://preseed.debian.net/debian-preseed/bookworm/amd64-main-full.txt
+d-i apt-setup/services-select multiselect security updates, release updates, backported software
+# Different spelling:
+# d-i apt-setup/services-select multiselect security, updates, backports
+
+d-i apt-setup/security_host string security.debian.org
+
+# Whether to upgrade packages after debootstrap. Allowed values: none, safe-upgrade, full-upgrade
+d-i pkgsel/upgrade select full-upgrade
+
+# Applying updates on a frequent basis is an important part of keeping the system secure.
+#
+#  .
+#  By default, security updates are not automatically installed, as security advisories should be
+#  reviewed before manual installation of the updates using standard package management tools.
+#  .
+#  Alternatively the unattended-upgrades package can be installed, which will install security
+#  updates automatically. Note however that automatic installation of updates may occasionally
+#  cause unexpected downtime of services provided by this machine in the rare cases where the
+#  update is not fully backward-compatible, or where the security advisory requires the
+#  administrator to perform some other manual operation.
+#  .
+#  Possible choices: No automatic updates, Install security updates automatically
+
+d-i pkgsel/update-policy select Install security updates automatically
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/base.cfg

@@ -0,0 +1,24 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Base installer                                                                          #
+###########################################################################################
+# Configure APT to not install recommended packages by default. Use of this option can
+# result in an incomplete system and should only be used by very experienced users:
+d-i base-installer/install-recommends boolean true
+
+# The kernel image to be installed; "none" can be used if no kernel is to be installed:
+d-i base-installer/kernel/image string linux-image-amd64
+
+# Choose to not get the tasksel dialog displayed at all (and don't install any packages):
+d-i pkgsel/run_tasksel boolean false
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/finished.cfg

@@ -0,0 +1,26 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Finishing installation                                                                  #
+###########################################################################################
+# Avoid that last message about the install being complete:
+d-i finish-install/reboot_in_progress note
+
+# This will prevent the installer from ejecting the CD during the reboot:
+d-i cdrom-detect/eject boolean true
+
+# This is how to make the installer shutdown when finished, but not reboot:
+d-i debian-installer/exit/halt boolean false
+
+# This will power off the machine instead of just halting it:
+d-i debian-installer/exit/poweroff boolean true
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/firmware.cfg

@@ -0,0 +1,19 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Firmware settings                                                                       #
+###########################################################################################
+# never             : Completely disables the firmware search.
+# missing (default) : Searches only when the firmware is needed.
+# always            : Always searches and asks for any firmware that could be useful for the hardware.
+d-i hw-detect/firmware-lookup string missing
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/grub.cfg

@@ -0,0 +1,62 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# GRUB2 settings                                                                          #
+###########################################################################################
+# Due notably to potential USB sticks, the location of the primary drive can not be
+# determined safely in general, so this needs to be specified:
+d-i grub-installer/bootdev string /dev/sda
+# To install to the primary device (assuming it is not a USB stick):
+# d-i grub-installer/bootdev  string default
+
+# Set this to false to install GRUB Legacy rather than GRUB 2, if possible:
+d-i grub-installer/grub2_instead_of_grub_legacy boolean true
+
+# This is fairly safe to set, it makes grub install automatically to the UEFI partition/boot
+# record if no other operating system is detected on the machine:
+d-i grub-installer/only_debian boolean true
+
+# This one makes grub-installer install to the UEFI partition/boot record, if it also finds
+# some other OS, which is less safe as it might not be able to boot that other OS:
+d-i grub-installer/with_other_os boolean true
+
+# OS-prober did not detect any other operating systems on your computer at this time, but you
+# may still wish to enable it in case you install more in the future:
+d-i grub-installer/enable_os_prober_otheros_no boolean true
+
+# Skip installing grub:
+d-i grub-installer/skip boolean false
+
+# Force GRUB installation to the EFI removable media path?
+#  .
+#  It seems that this computer is configured to boot via EFI, but maybe that configuration will
+#  not work for booting from the hard drive. Some EFI firmware implementations do not meet the
+#  EFI specification (i.e. they are buggy!) and do not support proper configuration of boot
+#  options from system hard drives.
+#  .
+#  A workaround for this problem is to install an extra copy of the EFI version of the GRUB
+#  boot loader to a fallback location, the "removable media path". Almost all EFI systems, no
+#  matter how buggy, will boot GRUB that way.
+#  .
+#  Warning: If the installer failed to detect another operating system that is present on your
+#  computer that also depends on this fallback, installing GRUB there will make that operating
+#  system temporarily unbootable. GRUB can be manually configured later to boot it if necessary.
+d-i grub-installer/force-efi-extra-removable boolean false
+
+# Description: Update NVRAM variables to automatically boot into Debian?
+#  .
+#  GRUB can configure your platform's NVRAM variables so that it boots into Debian automatically
+#  when powered on. However, you may prefer to disable this behavior and avoid changes to your
+#  boot configuration. For example, if your NVRAM variables have been set up such that your
+#  system contacts a PXE server on every boot, this would preserve that behavior.
+d-i grub-installer/update-nvram boolean true
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/locale.cfg

@@ -0,0 +1,25 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Locale settings                                                                         #
+###########################################################################################
+# Preseeding only locale sets language, country and locale:
+# d-i debian-installer/locale string en_US
+# The values can also be preseeded individually for greater flexibility:
+# d-i debian-installer/language string en
+# d-i debian-installer/country string NL
+# d-i debian-installer/locale string en_GB.UTF-8
+d-i debian-installer/locale string en_US.UTF-8
+
+d-i keyboard-configuration/layoutcode string de
+d-i keyboard-configuration/xkb-keymap select German
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/md5sum.txt

@@ -0,0 +1,15 @@
+336de475a23be401db656485fe2134e5 apt.cfg
+9b2768bf48aada9e1fc33cfe94571826 base.cfg
+95c0feba9a9ed2a1f3d86cc2bf1910f8 finished.cfg
+bccbc23588d19b3057e4b4915b03538b firmware.cfg
+d80da843499d8d797703b8aef2bf28d5 grub.cfg
+e876c113af0630f113811e5bade71b06 locale.cfg
+2b85692b087100a0535fe8711cdbcb63 modules.cfg
+1c0c74ed939c34d620bde9b8f1a91a1c network.cfg
+da7738a8db3d4e2c220bf3f5b3e50dcb packages.cfg
+5dff498042e3d095a792951ba1bd9d2f partitioning.cfg
+7f71ea76c629c4e4f0ab2f9a6c8b28ea security.cfg
+8e6b49c07d678060b661f7dd2fad6f39 software.cfg
+f526221c741e4e2c5090f2ff60e53d62 ssh.cfg
+1ffc41f4c70be83fd6524262494bdf11 time.cfg
+67b9d1aa4bb4a4b8610ca42fa45521cf user.cfg

config/includes.chroot/preseed/.cfg/modules.cfg

@@ -0,0 +1,39 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Modules                                                                                 #
+###########################################################################################
+# Install standard modules:
+d-i anna/standard_modules boolean true
+d-i anna/choose_modules string \
+crypto-dm-modules          \
+crypto-dm-setup-udeb       \
+ethdetect                  \
+fdisk-udeb                 \
+grub-installer             \
+hw-detect                  \
+lowmem                     \
+lvm2                       \
+mbr                        \
+netcfg                     \
+network-console            \
+parted                     \
+partman-auto               \
+partman-auto-crypto        \
+partman-basicfilesystems   \
+partman-btrfs              \
+partman-crypto             \
+partman-ext4               \
+partman-lvm                \
+partman-md                 \
+rescue-mode
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/network.cfg

@@ -0,0 +1,56 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Network setting                                                                         #
+###########################################################################################
+# netcfg will choose an interface that has link if possible. This makes it # skip
+# displaying a list if there is more than one interface:
+d-i netcfg/choose_interface select auto
+# To pick a particular interface instead:
+# d-i netcfg/choose_interface select eth1
+
+# To set a different link detection timeout (default is 3 seconds).
+d-i netcfg/link_wait_timeout string 10
+
+# If dhcp server is slow and the installer times out waiting for it, this might be useful.
+d-i netcfg/dhcp_timeout string 60
+d-i netcfg/dhcpv6_timeout string 60
+
+###########################################################################################
+# Automatic network configuration is the default. If you prefer to configure the network  #
+# manually, uncomment this line and the static network configuration below.               #
+###########################################################################################
+# d-i netcfg/disable_autoconfig boolean true
+
+###########################################################################################
+# If you want the preconfiguration file to work on systems both with and without a dhcp   #
+# server, uncomment these lines and the static network configuration below.               #
+###########################################################################################
+d-i netcfg/dhcp_failed note
+d-i netcfg/dhcp_options select Configure network manually
+
+###########################################################################################
+# Static network configuration.                                                           #
+###########################################################################################
+# d-i netcfg/get_nameservers string 192.168.128.254
+# d-i netcfg/get_ipaddress string 192.168.128.128
+# d-i netcfg/get_netmask string 255.255.255.0
+# d-i netcfg/get_gateway string 192.168.128.254
+# d-i netcfg/confirm_static boolean true
+
+###########################################################################################
+# If non-free firmware is needed for the network or other hardware, you can configure the #
+# installer to always try to load it, without prompting. Or change to false to disable    #
+# asking.                                                                                 #
+###########################################################################################
+d-i hw-detect/load_firmware boolean true
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/packages.cfg

@@ -0,0 +1,44 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Deb packages settings                                                                   #
+###########################################################################################
+# Please select the protocol to be used for downloading files. If unsure, select "http":
+d-i mirror/protocol string https
+
+# Country code or "manual":
+d-i mirror/country string US
+
+# Suite to install:
+d-i mirror/suite string stable
+# Suite to use for loading installer components (optional):
+d-i mirror/udeb/suite string stable
+
+# Debian archive mirror hostname. Please enter the hostname of the mirror from which
+# Debian will be downloaded. An alternate port can be specified using the standard
+# [hostname]:[port] format:
+d-i mirror/http/hostname string deb.debian.org
+
+# Debian archive mirror directory. Please enter the directory in which the mirror of
+# the Debian archive is located:
+d-i mirror/http/directory string /debian/
+
+# HTTP proxy information (blank for none). If you need to use a HTTP proxy to access the
+#  outside world, enter the proxy information here. Otherwise, leave this blank. The proxy
+# information should be given in the standard form of "http://[[user][:pass]@]host[:port]/".
+d-i mirror/http/proxy string
+
+# Debian archive mirror country. The goal is to find a mirror of the Debian archive that
+# is close to you on the network -- be aware that nearby countries, or even your own, may
+# not be the best choice.
+d-i mirror/https/countries select US
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/partitioning.cfg

@@ -0,0 +1,360 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Partitioning CISS.partitioning                                                          #
+###########################################################################################
+# If the system has free space you can choose to only partition that space. This is only
+# honoured if partman-auto/method is NOT set. Alternatively, choose 'use_entire_disk':
+# d-i partman-auto/init_automatically_partition select biggest_free
+# Alternatively, you may specify a disk to partition.
+###d-i partman-auto/disk string /dev/sda
+
+# In addition, you'll need to specify the method to use. Presently available methods are:
+# - regular : use the usual partition types for your architecture
+# - lvm     : use LVM to partition the disk
+# - crypto  : use LVM within an encrypted partition
+###d-i partman-auto/method string crypto
+
+# When disk encryption is enabled, skip wiping the partitions beforehand:
+###d-i partman-auto-crypto/erase_disks boolean false
+
+# You can define the amount of space that will be used for the LVM volume group. It can
+# either be a size with its unit (eg. 20 GB), a percentage of free space or 'max' keyword:
+###d-i partman-auto-lvm/guided_size string max
+
+# Name of the volume group for the new system:
+###d-i partman-auto-lvm/new_vg_name string vg_ciss
+
+# Force UEFI booting ('BIOS compatibility' will be lost). Default: false:
+###d-i partman-efi/non_efi_system boolean false
+
+# If one of the disks that are going to be automatically partitioned contains an old LVM
+# configuration, the user will normally receive a warning. This can be preseeded away:
+###d-i partman-lvm/device_remove_lvm boolean true
+# The same applies to pre-existing software RAID array:
+###d-i partman-md/device_remove_md boolean true
+# And the same goes for the confirmation to write the lvm partitions:
+###d-i partman-lvm/confirm boolean true
+###d-i partman-lvm/confirm_nooverwrite boolean true
+
+###########################################################################################
+# This makes partman automatically partition without confirmation, provided that it was   #
+# told what to do using one of the methods specified.                                     #
+###########################################################################################
+# The following debconfvariables are often important for the basic configuration and for  #
+# mounting after manual partitioning. These ensure that the installer does not attempt to #
+# make changes or overwrite already mounted partitions. They help to 'switch off' the     #
+# installer when it tries to apply partitioning automatically.                            #
+###########################################################################################
+# Confirm whether you actually want to create a new partition table and write it to disk:
+###d-i partman-partitioning/confirm_write_new_label boolean true
+###d-i partman/choose_partition select finish
+###d-i partman/confirm boolean true
+###d-i partman/confirm_nooverwrite boolean true
+
+# Ensure the partition table is GPT - this is required for EFI:
+###d-i partman-partitioning/choose_label select gpt
+###d-i partman-partitioning/default_label string gpt
+
+# This setting ensures that partitions without a mount point do not trigger a warning dialogue.
+###d-i partman-basicfilesystems/no_mount_point boolean true
+
+# This setting tells the Debian installer not to issue a warning if no swap partition is set up.
+###d-i partman-basicfilesystems/no_swap boolean true
+
+# Encryption settings
+# d-i partman-crypto/passphrase password < set by ./preseed/.ash/0_di_preseed_include_command.sh >
+# d-i partman-crypto/passphrase-again password < set by ./preseed/.ash/0_di_preseed_include_command.sh >
+###d-i partman-crypto/passphrase password DEFAULT
+###d-i partman-crypto/passphrase-again password DEFAULT
+###d-i partman-crypto/weak_passphrase boolean true
+
+# https://preseed.debian.net/debian-preseed/bookworm/amd64-main-full.txt
+###d-i partman-crypto/entropy entropy 256
+# debconf-set-selections -c ./preseed/.cfg/partitioning.cfg: "warning: Unknown type entropy, skipping line" therefore as string:
+###d-i partman-crypto/entropy string 256
+
+# Are you sure you want to use a random key?
+###d-i partman-crypto/use_random_for_nonswap boolean false
+
+###########################################################################################
+# This command is run immediately before the partitioner starts. It may be useful to      #
+# apply dynamic partitioner preseeding that depends on the state of the disks (which may  #
+# not be visible when preseed/early_command runs).                                        #
+###########################################################################################
+# d-i partman/early_command string /sh /.ciss/install/.ash/2_di_partman_early_command.sh
+
+###d-i partman-auto/expert_recipe string           \
+\
+511MiB 511MiB 511MiB EFS                  \
+label{ ESP }                            \
+$defaultignore{ }                       \
+$primary{ }                             \
+$bootable{ }                            \
+method{ efi }                           \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ EFS }                       \
+device{ /dev/sda }                      \
+mountpoint{ /boot }                     \
+.                                       \
+rescue ::                                     \
+3584MiB 3584MiB 3584MiB ext4              \
+label{ rescue }                         \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ format }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ ext4 }                      \
+device{ /dev/sda }                      \
+mountpoint{ /mnt/rescue }               \
+.                                       \
+crypt_boot ::                                 \
+4096MiB 4096MiB 4096MiB ext4              \
+label{ boot }                           \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ format }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ ext4 }                      \
+device{ /dev/sda }                      \
+mountpoint{ /boot }                     \
+.                                       \
+crypt_ephemeral_swap ::                       \
+4096MiB 4096MiB 4096MiB none              \
+label{ crypt_swap }                     \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ keep }                          \
+device{ /dev/sda }                      \
+.                                       \
+crypt_ephemeral_tmp ::                        \
+4096MiB 4096MiB 4096MiB none              \
+label{ crypt_tmp }                      \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ keep }                          \
+device{ /dev/sda }                      \
+.                                       \
+crypt_home ::                                 \
+32768MiB 32768MiB 32768MiB crypto         \
+$primary{ }                             \
+method{ crypto }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ btrfs }                     \
+label{ btrfs_home }                     \
+options/subvol{ @snapshots }            \
+device{ /dev/sda }                      \
+mountpoint{ /home }                     \
+.                                       \
+crypt_root ::                                 \
+32768MiB 32768MiB 32768MiB crypto         \
+$primary{ }                             \
+method{ crypto }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ btrfs }                     \
+label{ btrfs_root }                     \
+options/subvol{ @snapshots }            \
+device{ /dev/sda }                      \
+mountpoint{ / }                         \
+.                                       \
+crypt_usr ::                                  \
+40960MiB 40960MiB 40960MiB crypto         \
+$primary{ }                             \
+method{ crypto }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ btrfs }                     \
+label{ btrfs_usr }                      \
+options/subvol{ @snapshots }            \
+device{ /dev/sda }                      \
+mountpoint{ /usr }                      \
+.                                       \
+crypt_var ::                                  \
+40960MiB 40960MiB 40960MiB crypto         \
+$primary{ }                             \
+method{ crypto }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ btrfs }                     \
+label{ btrfs_var }                      \
+options/subvol{ @snapshots }            \
+device{ /dev/sda }                      \
+mountpoint{ /var }                      \
+.                                       \
+crypt_var_log ::                              \
+16384MiB 16384MiB 16384MiB crypto         \
+$primary{ }                             \
+method{ crypto }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ btrfs }                     \
+label{ btrfs_var_log }                  \
+options/subvol{ @snapshots }            \
+device{ /dev/sda }                      \
+mountpoint{ /var/log }                  \
+.                                       \
+crypt_var_log_audit ::                        \
+16384MiB 16384MiB 16384MiB crypto         \
+$primary{ }                             \
+method{ crypto }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ btrfs }                     \
+label{ btrfs_var_log_audit }            \
+options/subvol{ @snapshots }            \
+device{ /dev/sda }                      \
+mountpoint{ /var/log/audit }            \
+.                                       \
+crypt_var_tmp ::                              \
+16384MiB 16384MiB 16384MiB crypto         \
+$primary{ }                             \
+method{ crypto }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ btrfs }                     \
+label{ btrfs_var_tmp }                  \
+options/subvol{ @snapshots }            \
+device{ /dev/sda }                      \
+mountpoint{ /var/tmp }                  \
+.                                       \
+installer_tmp ::                              \
+1024MiB 16384MiB -1 ext4                  \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ format }                        \
+format{ }                               \
+use_filesystem{ }                       \
+filesystem{ ext4 }                      \
+mountpoint{ /tmp }                      \
+device{ /dev/sda }                      \
+label{ installer_tmp }                  \
+.
+###########################################################################################
+#d-i partman-auto/choose_recipe select ciss-2025-btrfs-ultra
+#d-i partman-auto/expert_recipe string           \
+ciss-2025-btrfs-ultra ::                      \
+ESP :                                       \
+511 511 511 free                          \
+$defaultignore{ }                       \
+$primary{ }                             \
+$bootable{ }                            \
+method{ efi } format{ }                 \
+label{ ESP }                            \
+.                                       \
+boot :                                      \
+3584 3584 3584 ext4                       \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ ext4 }    \
+mountpoint{ /boot }                     \
+label{ boot }                           \
+.                                       \
+crypt_ephemeral_swap :                      \
+4096 4096 4096 none                       \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ keep }                          \
+label{ crypt_sda3 }                     \
+.                                       \
+crypt_ephemeral_tmp :                       \
+4096 4096 4096 none                       \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ keep }                          \
+label{ crypt_sda4 }                     \
+.                                       \
+lv_home :                                   \
+32768 32768 32768 btrfs                   \
+$lvmok{ }                               \
+lv_name{ lv_home }                      \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ btrfs }   \
+label{ btrfs_home }                     \
+options/subvol{ @snapshots }            \
+mountpoint{ /home }                     \
+.                                       \
+lv_root :                                   \
+32768 32768 32768 btrfs                   \
+$lvmok{ }                               \
+lv_name{ lv_root }                      \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ btrfs }   \
+label{ btrfs_root }                     \
+options/subvol{ @snapshots }            \
+mountpoint{ / }                         \
+.                                       \
+lv_usr :                                    \
+65536 65536 65536 btrfs                   \
+$lvmok{ }               }               \
+lv_name{ lv_usr }                       \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ btrfs }   \
+label{ btrfs_usr }                      \
+options/subvol{ @snapshots }            \
+mountpoint{ /usr }                      \
+.                                       \
+lv_var :                                    \
+65536 65536 65536 btrfs                   \
+$lvmok{ }                               \
+lv_name{ lv_var }                       \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ btrfs }   \
+label{ btrfs_var }                      \
+options/subvol{ @snapshots }            \
+mountpoint{ /var }                      \
+.                                       \
+lv_var_log :                                \
+16384 16384 16384 btrfs                   \
+$lvmok{ }                               \
+lv_name{ lv_var_log }                   \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ btrfs }   \
+label{ btrfs_var_log }                  \
+options/subvol{ @snapshots }            \
+mountpoint{ /var/log }                  \
+.                                       \
+lv_var_log_audit :                          \
+16384 16384 16384                         \
+$lvmok{ }                               \
+lv_name{ lv_var_log_audit }             \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ btrfs }   \
+label{ btrfs_var_log_audit }            \
+options/subvol{ @snapshots }            \
+mountpoint{ /var/log/audit }            \
+.                                       \
+lv_var_tmp :                                \
+1 16384 -1                                \
+$lvmok{ }                               \
+lv_name{ lv_var_tmp }                   \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ btrfs }   \
+label{ btrfs_var_tmp }                  \
+options/subvol{ @snapshots }            \
+mountpoint{ /var/tmp }                  \
+.                                       \
+rescue :                                    \
+1024 8192 -1                              \
+$defaultignore{ }                       \
+$primary{ }                             \
+method{ format } format{ }              \
+use_filesystem{ } filesystem{ ext4 }    \
+mountpoint{ /tmp }                      \
+label{ rescue }                         \
+.
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/security.cfg

@@ -0,0 +1,21 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Security settings                                                                       #
+###########################################################################################
+# The installer will ensure that any packages are signed and authenticated.
+d-i debian-installer/allow_unauthenticated boolean false
+
+# This ensures that the connection between the installer and the server from which files
+# are downloaded is encrypted and signed by a trusted certificate authority.
+d-i debian-installer/allow_unauthenticated_ssl boolean false
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/software.cfg

@@ -0,0 +1,59 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# Software installation                                                                   #
+###########################################################################################
+d-i pkgsel/include string     \
+apt-show-versions             \
+apt-transport-https           \
+apt-utils                     \
+bat                           \
+bc                            \
+ca-certificates               \
+curl                          \
+debconf                       \
+debconf-utils                 \
+dialog                        \
+expect                        \
+figlet                        \
+fzf                           \
+gawk                          \
+git                           \
+gnupg2                        \
+haveged                       \
+htop                          \
+iftop                         \
+iputils-ping                  \
+jq                            \
+keychain                      \
+libpam-google-authenticator   \
+libpam-pwquality              \
+locate                        \
+lsb-release                   \
+lvm2                          \
+makepasswd                    \
+man                           \
+mtr                           \
+nano                          \
+ncat                          \
+neofetch                      \
+net-tools                     \
+parted                        \
+pollinate                     \
+pwgen                         \
+openssh-server                \
+unzip                         \
+virt-what                     \
+whois                         \
+wget                          \
+zip
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh

config/includes.chroot/preseed/.cfg/ssh.cfg

@@ -0,0 +1,22 @@
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+###########################################################################################
+# SSH settings                                                                            #
+###########################################################################################
+# Use the following settings if you wish to make use of the network-console component for #
+# remote installation over SSH. This only makes sense if you intend to perform the        #
+# remainder of the installation manually.                                                 #
+###########################################################################################
+d-i network-console/authorized_keys_url string https : //coresecret.eu/download/developer/2024_rsa4096_developer_root.pub.key
+# d-i network-console/password password < never ever use plain hardcoded credentials >
+# d-i network-console/password-again password < never ever use plain hardcoded credentials >
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh