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BentoPDF for bau-pm, without third-party hosts (bau-pm BAU-119)

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BentoPDF v2.8.8 built from source at its pinned commit with BentoPDF's own
air-gapped build options, every module it would load from a CDN vendored and
checked against vendor.lock, a Content-Security-Policy without a single host,
digital-sign-pdf and timestamp-pdf disabled because both need a third party,
and the hand-off glue on every page: the AGPL source link, the hand-in of a
file from bau-pm through a one-minute cookie into sessionStorage, confirmed by
the tool's reaction, the hand-back of a result from every window, and the
signing tool's flatten switch locked on.

The zero-host gate drives all 117 enabled tool pages in Chromium and fails on
any request to another origin, any CSP violation, a CSP that names a host, and
a disabled id that names no page. Green on this image (3 min 52 s on a private
network), red on the stock upstream image (115 findings) and on a misspelled
id. CI runs it on every push, the release workflow before it pushes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
magdevandClaude Opus 5.5 committed 2026-10-10 19:36:02 +02:00
commit 47138ddfbe
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.dockerignore
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.git
.gitea
node_modules
*.md
!README.md
.gitea/workflows/ci.yml
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# CI - every push to dev and every pull request: the scripts linted, the image
# built from BentoPDF's pinned commit, and the gate this repository exists for
# (README, "The gate"): a page may talk to its own origin and to nobody else.
name: CI
on:
push:
branches: [dev]
pull_request:
jobs:
gate:
runs-on: ubuntu-latest
timeout-minutes: 120
steps:
- uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
# Over stdin: the runner passes the host's Docker socket through, so a
# mounted workspace would resolve on the host and be empty.
- name: shellcheck
run: |
for f in scripts/*.sh; do
echo "-- $f"
docker run --rm -i koalaman/shellcheck:v0.11.0 - < "$f"
done
# npm ci and the Vite build are the slow part, several minutes on the
# shared runner; the vendor stage downloads about 60 MB from npm.
- name: build the image
timeout-minutes: 60
run: docker build --build-arg VERSION="ci-${GITHUB_SHA::8}" -t bau-pm-pdf-tools:ci .
- name: build the gate
timeout-minutes: 15
run: docker build -f test/Dockerfile -t bau-pm-pdf-tools-gate:ci .
- name: gate - nothing leaves the origin
timeout-minutes: 40
run: |
net="bau-pm-pdf-tools-ci-${GITHUB_RUN_ID}"
docker network create "$net" >/dev/null
trap 'docker rm -f -v "$net-app" >/dev/null 2>&1; docker network rm "$net" >/dev/null 2>&1' EXIT
docker run -d --name "$net-app" --network "$net" --network-alias pdf-tools bau-pm-pdf-tools:ci >/dev/null
for i in $(seq 1 30); do
docker run --rm --network "$net" bau-pm-pdf-tools-gate:ci wget -q --spider http://pdf-tools:8080/ && break
[ "$i" -eq 30 ] && { echo "the image never answered" >&2; exit 1; }
sleep 2
done
docker run --rm --network "$net" bau-pm-pdf-tools-gate:ci node test/zero-hosts.mjs http://pdf-tools:8080
.gitea/workflows/release.yml
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# Release - runs on semver tags (vMAJOR.MINOR.BUGFIX, cut on main after a
# fast-forward from dev): the gates, the image built and checked like in CI,
# pushed to the registry, and a Gitea release with the CHANGELOG section.
# Required: secrets REGISTRY_USERNAME, REGISTRY_PASSWORD (instance-wide).
name: Release
on:
push:
tags: ['v[0-9]+.[0-9]+.[0-9]+']
env:
REGISTRY: ${{ vars.REGISTRY || 'hub.bundespruefstelle.ch' }}
IMAGE: bau-pm/pdf-tools
jobs:
release:
runs-on: ubuntu-latest
timeout-minutes: 150
steps:
# Full history, or the ancestry gate cannot answer and would pass.
- uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
with:
fetch-depth: 0
- name: derive version from tag
run: echo "VERSION=${GITHUB_REF_NAME#v}" >> "$GITHUB_ENV"
- name: gate - CHANGELOG has a section for this version
run: |
if ! grep -q "^## \[$VERSION\]" CHANGELOG.md; then
echo "no '## [$VERSION]' section in CHANGELOG.md - cut it from [Unreleased] first" >&2
exit 1
fi
- name: gate - the tag is on main
run: |
git fetch --no-tags origin +refs/heads/main:refs/remotes/origin/main
if ! git merge-base --is-ancestor "$GITHUB_SHA" origin/main; then
echo "$GITHUB_SHA is not an ancestor of main - fast-forward main before tagging" >&2
exit 1
fi
- name: build the image
timeout-minutes: 60
run: |
docker build --build-arg VERSION="v$VERSION" \
-t "$REGISTRY/$IMAGE:$VERSION" -t "$REGISTRY/$IMAGE:latest" .
- name: gate - nothing leaves the origin
timeout-minutes: 50
run: |
docker build -f test/Dockerfile -t bau-pm-pdf-tools-gate:release .
net="bau-pm-pdf-tools-release-${GITHUB_RUN_ID}"
docker network create "$net" >/dev/null
trap 'docker rm -f -v "$net-app" >/dev/null 2>&1; docker network rm "$net" >/dev/null 2>&1' EXIT
docker run -d --name "$net-app" --network "$net" --network-alias pdf-tools "$REGISTRY/$IMAGE:$VERSION" >/dev/null
for i in $(seq 1 30); do
docker run --rm --network "$net" bau-pm-pdf-tools-gate:release wget -q --spider http://pdf-tools:8080/ && break
[ "$i" -eq 30 ] && { echo "the image never answered" >&2; exit 1; }
sleep 2
done
docker run --rm --network "$net" bau-pm-pdf-tools-gate:release node test/zero-hosts.mjs http://pdf-tools:8080
- name: push
run: |
echo "${{ secrets.REGISTRY_PASSWORD }}" \
| docker login "$REGISTRY" -u "${{ secrets.REGISTRY_USERNAME }}" --password-stdin
docker push "$REGISTRY/$IMAGE:$VERSION"
docker push "$REGISTRY/$IMAGE:latest"
echo "digest: $(docker inspect --format '{{index .RepoDigests 0}}' "$REGISTRY/$IMAGE:$VERSION")"
# Below 1.0.0 a release is a prerelease, derived from the tag.
- name: create Gitea release with changelog notes
run: |
notes="$(awk -v ver="$VERSION" '$0 ~ "^## \\[" ver "\\]" {f=1; next} /^## \[/ {f=0} f' CHANGELOG.md)"
payload="$(printf '%s' "$notes" | python3 -c 'import json,os,sys; v=os.environ["VERSION"]; print(json.dumps({"tag_name": "v" + v, "name": "bau-pm-pdf-tools v" + v, "body": sys.stdin.read().strip(), "prerelease": v.split(".")[0] == "0"}))')"
curl -sf -X POST \
-H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
-H "Content-Type: application/json" \
-d "$payload" \
"${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/releases" >/dev/null \
&& echo "Gitea release v$VERSION created" \
|| echo "release creation skipped (may already exist)"
.gitignore
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node_modules/
*.log
.markdownlint.jsonc
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// markdownlint rules (bau-pm BAU-110), read by scripts/lint-md.sh. Managed by
// the bau-pm plugin kit (templates/plugin/): change it there, not here.
{
// Markdown is never hard-wrapped here: one paragraph per line.
"MD013": false,
// Keep a Changelog repeats "### Added" / "### Fixed" under every release.
"MD024": { "siblings_only": true }
}
CHANGELOG.md
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# Changelog
All notable changes to this project are documented in this file. The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased]
### Added
- BentoPDF v2.8.8 built from source at its pinned commit with BentoPDF's air-gapped build options: Simple Mode, German by default, every module served from the image's own `/wasm/`, the CORS proxy off.
- The CDN modules vendored and checked against `vendor.lock` (PyMuPDF, Ghostscript, CoherentPDF, Tesseract with German, French, Italian and English, the OCR font, the PDF editor's Latin, Arabic and Hebrew fallback fonts). Ghostscript is served as its whole package with `gs.js` and `gs.wasm` linked at its root, because BentoPDF's own loader and PyMuPDF's wrapper expect the two different layouts (upstream's air-gap layout left `pdf-to-docx` with a 404).
- A Content-Security-Policy without any host, `img-src` included; the build fails if one survives.
- `digital-sign-pdf` and `timestamp-pdf` disabled: both need a third party by design.
- The hand-off glue on every page: a source link (AGPL), the hand-in of a file from bau-pm through a one-minute cookie into the tab's `sessionStorage`, confirmed by the tool's own reaction and retried while it has none (BentoPDF attaches its listener late, and its service worker made the glue win that race), the hand-back of a result caught in every window, the viewer's frame included, and waiting for the hand-off's details when a save comes before them, and the signing tool's flatten switch locked on.
- The zero-host gate (`test/zero-hosts.mjs`) over every tool page, in CI and in the release workflow.
Dockerfile
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# syntax=docker/dockerfile:1
#
# BentoPDF for bau-pm: BentoPDF built from source at a pinned commit with
# BentoPDF's own air-gapped build options, every module it would otherwise load
# from a CDN served from this image, and bau-pm's hand-off glue added to every
# page. Nothing here edits BentoPDF's code: its documented build arguments, its
# runtime config.json, its generated header file with the hosts taken out, and
# our files beside its own.
#
# The images are upstream's: the builder and the runtime stage are the ones
# BentoPDF's Dockerfile uses.
ARG BENTOPDF_REF=v2.8.8
ARG BENTOPDF_COMMIT=f96cd4e5166f3d51393dfe9f3c440b5bb77802f1
ARG NODE_IMAGE=public.ecr.aws/docker/library/node:20-alpine
ARG NGINX_IMAGE=quay.io/nginx/nginx-unprivileged:alpine-slim
# --- BentoPDF's source, at the commit the tag must point to ---
FROM ${NODE_IMAGE} AS source
ARG BENTOPDF_REF
ARG BENTOPDF_COMMIT
RUN apk add --no-cache git
RUN git clone --quiet --depth 1 --branch "${BENTOPDF_REF}" https://github.com/alam00000/bentopdf.git /src \
&& actual=$(git -C /src rev-parse HEAD) \
&& if [ "$actual" != "${BENTOPDF_COMMIT}" ]; then \
echo "BentoPDF ${BENTOPDF_REF} is ${actual}, expected ${BENTOPDF_COMMIT}" >&2; exit 1; \
fi \
&& rm -rf /src/.git
# --- The CDN modules, packed from npm and checked against vendor.lock ---
FROM ${NODE_IMAGE} AS vendor
COPY --from=source /src/bentopdf-airgap-bundle /src/bentopdf-airgap-bundle
COPY vendor.lock /vendor.lock
COPY --chmod=755 scripts/vendor.sh /usr/local/bin/vendor.sh
RUN vendor.sh /src /vendor.lock /wasm
# --- BentoPDF's build, as BentoPDF's Dockerfile runs it ---
FROM ${NODE_IMAGE} AS builder
WORKDIR /app
COPY --from=source /src/package.json /src/package-lock.json ./
COPY --from=source /src/vendor ./vendor
ENV HUSKY=0
RUN npm config set fetch-retries 5 \
&& npm config set fetch-retry-mintimeout 60000 \
&& npm config set fetch-retry-maxtimeout 300000 \
&& npm config set fetch-timeout 600000 \
&& npm ci
COPY --from=source /src ./
# The air-gapped build: every module path is this image's own, the CORS proxy
# (used only by the X.509 tool, which config.json disables) is switched off,
# and Simple Mode drops the marketing pages. Relative paths, so the image does
# not know the hostname it will be served under.
ENV SIMPLE_MODE=true \
DISABLE_GITHUB_STARS=true \
COMPRESSION_MODE=all \
BASE_URL= \
VITE_DEFAULT_LANGUAGE=de \
VITE_CORS_PROXY_URL= \
VITE_WASM_PYMUPDF_URL=/wasm/pymupdf/ \
VITE_WASM_GS_URL=/wasm/gs/ \
VITE_WASM_CPDF_URL=/wasm/cpdf/ \
VITE_TESSERACT_WORKER_URL=/wasm/ocr/worker.min.js \
VITE_TESSERACT_CORE_URL=/wasm/ocr/core \
VITE_TESSERACT_LANG_URL=/wasm/ocr/lang-data \
VITE_TESSERACT_AVAILABLE_LANGUAGES=deu,fra,ita,eng \
VITE_OCR_FONT_BASE_URL=/wasm/ocr/fonts \
VITE_EMBEDPDF_FONTS_URL=/wasm/embedpdf \
NODE_OPTIONS=--max-old-space-size=3072
RUN npm run build
COPY --chmod=755 scripts/finish.sh /usr/local/bin/finish.sh
RUN finish.sh /app
# --- Upstream's runtime stage, with our files beside BentoPDF's ---
FROM ${NGINX_IMAGE}
ARG BENTOPDF_REF
ARG SOURCE_URL=https://src.bundespruefstelle.ch/magdev/bau-pm-pdf-tools
ARG VERSION=dev
LABEL org.opencontainers.image.title="bau-pm-pdf-tools" \
org.opencontainers.image.description="BentoPDF ${BENTOPDF_REF} for bau-pm, without third-party hosts" \
org.opencontainers.image.source="${SOURCE_URL}" \
org.opencontainers.image.version="${VERSION}" \
org.opencontainers.image.licenses="AGPL-3.0-only"
ENV DISABLE_IPV6=false \
PORT=8080
USER root
RUN apk upgrade --no-cache
USER nginx
COPY --chown=nginx:nginx --from=builder /app/dist /usr/share/nginx/html
COPY --chown=nginx:nginx --from=builder /app/nginx.conf /etc/nginx/nginx.conf
COPY --chown=nginx:nginx --from=builder /app/security-headers.conf /etc/nginx/security-headers.conf
COPY --chown=nginx:nginx --from=builder /app/security-headers-docs.conf /etc/nginx/security-headers-docs.conf
COPY --chown=nginx:nginx --chmod=755 --from=builder /app/nginx-ipv6.sh /docker-entrypoint.d/99-disable-ipv6.sh
COPY --chown=nginx:nginx --chmod=755 --from=builder /app/nginx-noindex.sh /docker-entrypoint.d/98-noindex.sh
COPY --chown=nginx:nginx --from=vendor /wasm /usr/share/nginx/html/wasm
COPY --chown=nginx:nginx config/config.json /usr/share/nginx/html/config.json
COPY --chown=nginx:nginx glue/ /usr/share/nginx/html/bau-pm/
RUN sed -i "s#__BAU_PM_SOURCE_URL__#${SOURCE_URL}/src/tag/${VERSION}#" /usr/share/nginx/html/bau-pm/handoff.js \
&& grep -q "${SOURCE_URL}" /usr/share/nginx/html/bau-pm/handoff.js \
&& mkdir -p /etc/nginx/tmp
EXPOSE 8080
HEALTHCHECK --interval=30s --timeout=5s --retries=3 CMD wget --spider -q http://127.0.0.1:8080/ || exit 1
CMD ["nginx", "-g", "daemon off;"]
LICENSE
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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
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get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.
README.md
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# bau-pm-pdf-tools
[BentoPDF](https://github.com/alam00000/bentopdf) for [bau-pm](https://src.bundespruefstelle.ch/magdev/bau-pm): about 120 PDF tools (edit, annotate, sign, fill forms, organise, merge, split, compress, convert, OCR) that run entirely in the browser, packaged so that a page of it talks to its own origin and to **nobody else**, plus the glue that hands a PDF from bau-pm into a tool and the result back.
This repository is public on purpose. BentoPDF is AGPL-3.0, and this is a modified version served over a network, so its source is offered to every user: each page of the running image links here, to the tag it was built from.
## What is in the image
- **BentoPDF built from source at a pinned commit** (`BENTOPDF_REF` and `BENTOPDF_COMMIT` in the `Dockerfile`; the build fails if the tag points elsewhere), with BentoPDF's own air-gapped build options: Simple Mode, German as the default language, every module path pointing at this image (`/wasm/...`), the CORS proxy switched off.
- **Every module BentoPDF would otherwise load from a CDN**, served from `/wasm/`: PyMuPDF and Ghostscript from BentoPDF's own repository at that commit, CoherentPDF, Tesseract with `deu`, `fra`, `ita` and `eng`, the OCR text-layer font and the PDF editor's Latin, Arabic and Hebrew fallback fonts from npm. `scripts/vendor.sh` packs each one and refuses the build when the registry's integrity differs from `vendor.lock`. The editor's CJK fonts (30 to 42 MB each) are left out; a document that needs them asks this server and gets a 404, never a third party.
- **A Content-Security-Policy without a single host**: BentoPDF's generated header file with every `http(s):` source taken out, `img-src` included (`scripts/finish.sh`, which fails the build if any host survives).
- **Two tools disabled** in `config/config.json`, because they cannot work without a third party: `digital-sign-pdf` (X.509 signing fetches certificate chains through a CORS proxy) and `timestamp-pdf` (an RFC 3161 timestamp needs an external timestamp authority).
- **The glue**, `glue/handoff.js`, added to every HTML page by `scripts/finish.sh`: the source link, the hand-in of a file from bau-pm, the hand-back of a result, and the signing tool's flatten switch locked on. See the file's header for how each works.
Nothing of BentoPDF's code is edited: its documented build arguments, its runtime `config.json`, its generated header file with fewer hosts, and our files beside its own.
## How bau-pm uses it
bau-pm runs the image as its `pdf-tools` service on an origin of its own (`PDF_TOOLS_ADDRESS`, e.g. `pdf.example.ch`), behind its Caddy, which asks Redmine before serving any page, so only logged-in users get in. The design, the login gate and the hand-off protocol are bau-pm's (`PLAN.md` §2.50 there); this image only needs to be reachable on port 8080. It is static nginx: about 3 MB of memory, and it writes nothing but its temp directories, so it runs with a read-only root and three tmpfs mounts owned by uid 101 (see bau-pm's `compose.yaml`).
## The gate
`test/zero-hosts.mjs` drives every tool page linked from the German overview in a phone-sized Chromium: it gives each a probe file its input accepts, presses its main button, and fails on any request to another origin and on any CSP violation (a blocked request is a tool that tried to call out). It also fails when the CSP names a host, and when an id in `config.json` does not name a real page or its page still offers the tool. CI runs it on every push (`.gitea/workflows/ci.yml`), and the release workflow runs it again on the image it is about to push.
It has teeth: fed the stock upstream image it fails with 115 findings (PyMuPDF, Pyodide and CoherentPDF from jsdelivr), and fed a misspelled disabled id it fails with "no page".
Locally (bridged containers need no internet for it):
```sh
docker build -t bau-pm-pdf-tools:ci .
docker build -f test/Dockerfile -t bau-pm-pdf-tools-gate:ci .
docker network create pdf-gate
docker run -d --name pdf-gate-app --network pdf-gate --network-alias pdf-tools bau-pm-pdf-tools:ci
docker run --rm --network pdf-gate bau-pm-pdf-tools-gate:ci node test/zero-hosts.mjs http://pdf-tools:8080
docker rm -f -v pdf-gate-app && docker network rm pdf-gate
```
## Bumping BentoPDF
1. Set `BENTOPDF_REF` and `BENTOPDF_COMMIT` in the `Dockerfile` to the new tag and its commit.
2. Compare the module versions BentoPDF expects (`package-lock.json` for Tesseract, `.env.production` and `src/js/utils/wasm-provider.ts` for PyMuPDF, Ghostscript and CoherentPDF, `src/js/config/editor-fonts.ts` for the editor's fonts, `src/js/config/font-mappings.ts` for the OCR font) with `vendor.lock` and `scripts/vendor.sh`, and update both together: a new version needs its integrity from the registry (`npm view <pkg>@<version> dist.integrity`).
3. Read the diff of `scripts/generate-security-headers.mjs`, `nginx.conf` and `scripts/prepare-airgap.sh` upstream: a new directive, a new CDN or a new module layout is where a bump can break the zero-host promise.
4. Build, run the gate, and check the two disabled tools are still the only ones that need a third party.
5. Note the bump in `CHANGELOG.md`, release, and pin the new tag in bau-pm (`PDF_TOOLS_VERSION`).
## Known upstream issues (BentoPDF v2.8.8)
Measured on 2026-10-10 against the stock image as much as against this one, so they are upstream behaviour, not this packaging:
- **A signature drawn in the signing tool cannot be saved.** With real touch input, pdf.js's serialisation fails (`Cannot read properties of null (reading 'serialize')`): with *Flatten PDF* on the export fails visibly, with it off pdf.js silently saves the unsigned original. A typed signature saves.
- **Flattening drops a signature on some PDFs.** BentoPDF's `flattenAnnotations` removes any annotation without an appearance stream, and on a PDF rendered by rbpdf/TCPDF (bau_pm_preflight's Vorausmass sheet) the typed signature comes back without one. On a PDF pdf-lib has re-saved once, it is kept. With flatten off, the signature stays as an annotation.
bau_pm_preflight's tablet sign-off (its PRE-43) waits on these; see its `PLAN.md` §3.22.
## Licence
AGPL-3.0, as BentoPDF (`LICENSE`). The vendored modules keep their own licences; see `THIRD-PARTY.md`.
THIRD-PARTY.md
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# Third-party components in the image
The image contains BentoPDF and the modules below, unmodified, at the versions listed; the licences are as each package declares it on npm (read 2026-10-10). The source links are the corresponding source of what the image serves under `/wasm/`.
| Component | Version | Licence | Source |
| --- | --- | --- | --- |
| BentoPDF | v2.8.8 (`f96cd4e5166f3d51393dfe9f3c440b5bb77802f1`) | AGPL-3.0 (or BentoPDF's commercial licence) | <https://github.com/alam00000/bentopdf/tree/v2.8.8> |
| PyMuPDF (WASM, `@bentopdf/pymupdf-wasm`) | 0.11.16 | AGPL-3.0-only | <https://github.com/alam00000/bentopdf-pymupdf-wasm>; the tarball from BentoPDF's `bentopdf-airgap-bundle/` at the commit above |
| Ghostscript (WASM, `@bentopdf/gs-wasm`) | 0.1.1 | AGPL-3.0-only | <https://github.com/alam00000/bentopdf-gs-wasm>; the tarball from BentoPDF's `bentopdf-airgap-bundle/` at the commit above |
| CoherentPDF (`coherentpdf`) | 2.5.5 | AGPL-3.0-or-later | <https://www.npmjs.com/package/coherentpdf/v/2.5.5>, <https://github.com/coherentgraphics/coherentpdf.js> |
| Tesseract.js (`tesseract.js`, `tesseract.js-core`) | 7.0.0 | Apache-2.0 | <https://github.com/naptha/tesseract.js>, <https://github.com/naptha/tesseract.js-core> |
| Tesseract language data (`@tesseract.js-data/deu`, `fra`, `ita`, `eng`) | 1.0.0 (`4.0.0_best_int`) | MIT (as published on npm) | <https://github.com/naptha/tessdata> |
| Noto Sans (OCR text layer) | noto-fonts `ffebf8c1ee449e544955a7e813c54f9b73848eac` | OFL-1.1 | <https://github.com/googlefonts/noto-fonts> |
| EmbedPDF fonts (`@embedpdf/fonts-latin`, `-arabic`, `-hebrew`) | 1.0.0 | OFL-1.1 | <https://github.com/embedpdf/embed-pdf-viewer> |
The npm tarballs are checked against the integrity hashes in `vendor.lock`, the Noto Sans file against the SHA-256 in `scripts/vendor.sh`.
config/config.json
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{
"disabledTools": ["digital-sign-pdf", "timestamp-pdf"]
}
glue/handoff.js
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/* bau-pm-pdf-tools - the hand-off between bau-pm and BentoPDF's tools.
*
* Loaded by every page of this image, the PDF.js viewers' pages inside the
* tools included, as a classic script in <head>, so it runs before BentoPDF's
* own modules. It does four things:
*
* 1. A link to this image's source on every page, because the AGPL asks the
* source of a modified version served over a network to be offered
* prominently, and BentoPDF's Simple Mode hides its own footer.
* 2. The hand-in. bau-pm's entry leaves the hand-off token in a one-minute
* cookie; it moves into sessionStorage (this tab only, gone with it), the
* cookie is deleted at once, and the file is fetched from
* /bau-pm/handoff/file and given to the tool's file input, the way a user
* picking it would. Never in a URL: a token in a redirect's Location
* header lands in every access log on the way.
* 3. The hand-back. Every BentoPDF tool saves its result the same way: a blob
* URL on an <a download>, click(), revoke. While a hand-off is active and
* may be saved, that click is caught - in the top page and in the viewer's
* frame - and offered back to bau-pm instead of the downloads folder. The
* blob is read inside click(), because the next line revokes its URL.
* 4. For the signing tool, BentoPDF's "flatten" switched on and locked, so a
* signature becomes part of the page and cannot be moved later.
*
* Nothing here talks to anything but this origin. The words of the hand-off
* come from bau-pm in the user's language; only the source link has its own.
*/
(function () {
'use strict';
var KEY = 'bau-pm-handoff';
var COOKIE = '__Host-bau_pm_handoff';
var API = '/bau-pm/handoff';
var SOURCE_URL = '__BAU_PM_SOURCE_URL__';
var isTop = window.top === window;
// --- shared state --------------------------------------------------------
function readState() {
try { return JSON.parse(window.sessionStorage.getItem(KEY) || 'null'); } catch (e) { return null; }
}
function writeState(state) {
try {
if (state) { window.sessionStorage.setItem(KEY, JSON.stringify(state)); } else { window.sessionStorage.removeItem(KEY); }
} catch (e) { /* storage blocked: the hand-off lasts this page only */ }
}
function ready(fn) {
if (document.readyState !== 'loading') { fn(); } else { document.addEventListener('DOMContentLoaded', fn); }
}
function fill(text, values) {
return String(text || '').replace(/%\{(\w+)\}/g, function (m, key) {
return values && values[key] != null ? values[key] : m;
});
}
// --- 3. the hand-back, installed first and in every window ---------------
var nativeClick = HTMLAnchorElement.prototype.click;
HTMLAnchorElement.prototype.click = function () {
var api = null;
try { api = window.top.bauPmHandoff; } catch (e) { api = null; }
if (api && api.catches() && this.hasAttribute('download') && /^blob:/.test(this.href)) {
// Started synchronously: fetch() resolves the blob URL now, before the
// caller's revokeObjectURL on the next line.
var name = this.download;
var blob = window.fetch(this.href).then(function (r) { return r.blob(); });
api.offer(blob, name);
return undefined;
}
return nativeClick.apply(this, arguments);
};
if (!isTop) {
signFrame();
return;
}
// --- 1. the source link --------------------------------------------------
var LANG = (window.location.pathname.split('/')[1] || 'en').slice(0, 2);
var SOURCE_LABEL = { de: 'Quelltext (AGPL-3.0)', fr: 'Code source (AGPL-3.0)', it: 'Codice sorgente (AGPL-3.0)' }[LANG] ||
'Source code (AGPL-3.0)';
var CSS = [
'.bau-pm-source{position:fixed;left:8px;bottom:8px;z-index:2147483000;font:12px/1.4 system-ui,sans-serif;',
'color:#d1d5db;background:rgba(17,24,39,.85);padding:2px 8px;border-radius:4px;text-decoration:none}',
'.bau-pm-source:hover,.bau-pm-source:focus{color:#fff;text-decoration:underline}',
'.bau-pm-bar{position:sticky;top:0;z-index:2147483001;display:flex;gap:12px;align-items:center;',
'padding:10px 14px;background:#111827;color:#f9fafb;border-bottom:3px solid #F28E00;font:15px/1.4 system-ui,sans-serif}',
'.bau-pm-bar span{flex:1;min-width:0;overflow-wrap:anywhere}',
'.bau-pm-bar button,.bau-pm-sheet button,.bau-pm-sheet a{font:inherit;min-height:44px;padding:8px 16px;border-radius:6px;cursor:pointer}',
'.bau-pm-bar button{background:transparent;color:#f9fafb;border:1px solid #6b7280}',
'.bau-pm-scrim{position:fixed;inset:0;z-index:2147483002;background:rgba(0,0,0,.55);display:flex;align-items:flex-end;justify-content:center}',
'.bau-pm-sheet{width:100%;max-width:560px;background:#111827;color:#f9fafb;border-radius:12px 12px 0 0;',
'padding:20px;display:flex;flex-direction:column;gap:12px;font:16px/1.4 system-ui,sans-serif;box-sizing:border-box}',
'.bau-pm-sheet p{margin:0;overflow-wrap:anywhere}',
'.bau-pm-sheet .bau-pm-primary{background:#F28E00;color:#1a1a1a;border:0;font-weight:600}',
'.bau-pm-sheet .bau-pm-secondary{background:transparent;color:#f9fafb;border:1px solid #6b7280;text-align:center;text-decoration:none}',
'.bau-pm-sheet .bau-pm-error{color:#fca5a5}'
].join('');
ready(function () {
var style = document.createElement('style');
style.textContent = CSS;
document.head.appendChild(style);
var link = document.createElement('a');
link.className = 'bau-pm-source';
link.href = SOURCE_URL;
link.rel = 'noopener';
link.target = '_blank';
link.textContent = SOURCE_LABEL;
document.body.appendChild(link);
});
// --- 2. the hand-in ------------------------------------------------------
var match = new RegExp('(?:^|;\\s*)' + COOKIE + '=([^;]+)').exec(document.cookie);
if (match) {
writeState({ token: decodeURIComponent(match[1].replace(/\+/g, ' ')) });
document.cookie = COOKIE + '=; Max-Age=0; Path=/; Secure; SameSite=Strict';
}
var state = readState();
var meta = null;
var receipt = null;
var file = null;
var settle = null;
// Resolves with the meta once it is here, or null when there is none. A
// save clicked before that - BentoPDF reloads the page once when its service
// worker first takes control, and the glue fetches the meta again - waits
// for it instead of slipping through as a plain download.
var metaReady = new Promise(function (resolve) { settle = resolve; });
window.bauPmHandoff = {
catches: function () { return meta ? !!meta.writable : !!(state && state.token); },
offer: function (blob, name) {
metaReady.then(function (ready) {
// Not to be saved back: an ordinary download, unless the hand-off
// offers none either (the Vorausmass), when the result goes nowhere.
if (ready && ready.writable) { offer(blob, name); } else if (!ready || ready.download) { save(blob, name); }
});
}
};
// A plain download, for a result that is not to be offered back.
function save(blobPromise, name) {
blobPromise.then(function (blob) {
var a = document.createElement('a');
a.href = URL.createObjectURL(blob);
a.download = name;
nativeClick.call(a);
window.setTimeout(function () { URL.revokeObjectURL(a.href); }, 1000);
});
}
if (!state || !state.token) { settle(null); return; }
function call(path, options) {
options = options || {};
options.headers = options.headers || {};
options.headers.Authorization = 'Bearer ' + state.token;
options.credentials = 'same-origin';
options.cache = 'no-store';
return window.fetch(API + path, options);
}
function end() {
writeState(null);
state = null;
meta = null;
settle(null);
var bar = document.querySelector('.bau-pm-bar');
if (bar) { bar.remove(); }
}
call('/meta').then(function (response) {
if (!response.ok) { throw new Error(String(response.status)); }
return response.json();
}).then(function (data) {
meta = data;
settle(data);
return call('/file');
}).then(function (response) {
if (!response.ok) { throw new Error(String(response.status)); }
receipt = response.headers.get('X-Bau-Pm-Receipt');
return response.blob();
}).then(function (blob) {
file = new File([blob], meta.filename, { type: 'application/pdf' });
ready(function () { banner(); feed(); lockFlatten(); });
}).catch(function () {
// An expired or foreign token, or a file that is gone: nothing to hand
// over, and nothing to say that the gate's own page would not say better.
end();
});
function banner() {
var bar = document.createElement('div');
bar.className = 'bau-pm-bar';
bar.setAttribute('role', 'status');
var text = document.createElement('span');
var values = { filename: meta.filename, title: meta.title };
text.textContent = fill(meta.strings.banner, values) +
(document.querySelector('input[type=file]') ? '' : ' - ' + meta.strings.pick);
var close = document.createElement('button');
close.type = 'button';
close.textContent = meta.strings.dismiss;
close.addEventListener('click', end);
bar.appendChild(text);
bar.appendChild(close);
document.body.insertBefore(bar, document.body.firstChild);
}
// The tool's own input, once per page and only while it is empty: picking
// another file by hand always wins.
//
// After the page's load event, and confirmed: BentoPDF attaches a tool's
// change listener from a module it imports after load, so a change
// dispatched too early reaches nobody - which is what happened once its
// service worker served the page from cache and this file's own fetches
// won the race. So the feed watches for the tool's reaction (new nodes in
// the page that are not ours) and dispatches again if there is none, a few
// times at most, with time enough between tries that a slow tool is not
// handed the file twice.
function feed() {
var tries = 0;
function ours(node) {
var el = node.nodeType === 1 ? node : node.parentElement;
return !!(el && el.closest && el.closest('.bau-pm-bar, .bau-pm-source, .bau-pm-scrim'));
}
function attempt() {
var input = document.querySelector('input[type=file]');
if (!input || !/pdf/i.test(input.accept || 'pdf')) {
tries += 1;
if (tries < 60) { window.setTimeout(attempt, 250); }
return;
}
if (input.files && input.files.length && input.dataset.bauPmFed !== '1') { return; }
var transfer = new DataTransfer();
transfer.items.add(file);
input.files = transfer.files;
input.dataset.bauPmFed = '1';
var reacted = false;
var observer = new MutationObserver(function (records) {
if (records.some(function (r) { return !ours(r.target); })) { reacted = true; observer.disconnect(); }
});
observer.observe(document.body, { childList: true, subtree: true });
input.dispatchEvent(new Event('change', { bubbles: true }));
window.setTimeout(function () {
observer.disconnect();
tries += 1;
if (!reacted && tries < 5) { attempt(); }
}, 2000);
}
if (document.readyState === 'complete') { window.setTimeout(attempt, 300); } else {
window.addEventListener('load', function () { window.setTimeout(attempt, 300); });
}
}
// --- 4. the signing tool -------------------------------------------------
function lockFlatten() {
if (meta.tool !== 'sign-pdf') { return; }
var lock = function () {
var toggle = document.getElementById('flatten-signature-toggle');
if (!toggle || toggle.dataset.bauPmLocked) { return; }
toggle.checked = true;
toggle.dispatchEvent(new Event('change', { bubbles: true }));
toggle.disabled = true;
toggle.dataset.bauPmLocked = '1';
var row = toggle.closest('label') || toggle.parentElement;
if (row) { row.style.display = 'none'; }
};
lock();
new MutationObserver(lock).observe(document.body, { childList: true, subtree: true });
}
// Inside the viewer's frame of the signing tool: open on the last page,
// where the sheet's signature lines are.
function signFrame() {
var path = null;
try { path = window.top.bauPmHandoff && readState() ? window.top.location.pathname : null; } catch (e) { path = null; }
if (!path || !/\/sign-pdf(\.html)?$/.test(path)) { return; }
var tries = 0;
(function attempt() {
var app = window.PDFViewerApplication;
if (app && app.pdfDocument && app.pagesCount) {
app.page = app.pagesCount;
return;
}
tries += 1;
if (tries < 80) { window.setTimeout(attempt, 250); }
})();
}
// --- 3. the hand-back's sheet --------------------------------------------
function button(label, kind) {
var b = document.createElement('button');
b.type = 'button';
b.className = kind;
b.textContent = label;
return b;
}
function offer(blobPromise, name) {
var values = { title: meta.title, filename: name };
var scrim = document.createElement('div');
scrim.className = 'bau-pm-scrim';
var sheet = document.createElement('div');
sheet.className = 'bau-pm-sheet';
sheet.setAttribute('role', 'dialog');
sheet.setAttribute('aria-modal', 'true');
var message = document.createElement('p');
message.textContent = name;
var save = button(fill(meta.strings.save, values), 'bau-pm-primary');
sheet.appendChild(message);
sheet.appendChild(save);
if (meta.download) {
var download = button(meta.strings.download, 'bau-pm-secondary');
download.addEventListener('click', function () {
save(blobPromise, name);
scrim.remove();
});
sheet.appendChild(download);
}
var close = button(meta.strings.dismiss, 'bau-pm-secondary');
close.addEventListener('click', function () { scrim.remove(); });
sheet.appendChild(close);
save.addEventListener('click', function () {
save.disabled = true;
save.textContent = meta.strings.saving;
blobPromise.then(function (blob) {
return call('/file', {
method: 'POST',
body: blob,
headers: { 'Content-Type': 'application/pdf', 'X-Bau-Pm-Receipt': receipt || '' }
});
}).then(function (response) {
return response.json().then(function (body) { return { ok: response.ok, body: body }; });
}).then(function (result) {
if (!result.ok) { throw new Error(result.body.error || ''); }
if (result.body.next_url) {
writeState(null);
window.location.assign(result.body.next_url);
return;
}
message.textContent = result.body.notice || meta.strings.saved;
save.remove();
if (result.body.back_url) {
var back = document.createElement('a');
back.className = 'bau-pm-primary';
back.href = result.body.back_url;
back.textContent = fill(meta.strings.back, values);
back.style.textAlign = 'center';
back.style.textDecoration = 'none';
sheet.insertBefore(back, sheet.children[1] || null);
}
}).catch(function (error) {
message.className = 'bau-pm-error';
message.textContent = fill(meta.strings.failed, { error: error.message });
save.disabled = false;
save.textContent = meta.strings.retry;
});
});
scrim.appendChild(sheet);
document.body.appendChild(scrim);
save.focus();
}
})();
scripts/finish.sh
Executable
+45
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@@ -0,0 +1,45 @@
#!/bin/sh
# What this repository adds to BentoPDF's finished build, run in the
# Dockerfile's builder stage after `npm run build`:
#
# finish.sh <app-dir>
#
# 1. a <script src="/bau-pm/handoff.js"> in every HTML page, the PDF.js
# viewers' pages included (the sign tool saves from inside one of them);
# 2. the precompressed copies of those pages regenerated, because nginx's
# gzip_static would otherwise serve the old page without the tag;
# 3. every host taken out of the generated Content-Security-Policy, so the
# pages may load from their own origin and from nowhere else.
#
# Each step checks its own result and fails the build when it did not happen.
set -eu
app=$1
dist=$app/dist
tag='<script src="/bau-pm/handoff.js"></script>'
pages=$(find "$dist" -name '*.html' | wc -l)
[ "$pages" -gt 100 ] || { echo "finish: only $pages pages in $dist" >&2; exit 1; }
find "$dist" -name '*.html' | while read -r page; do
grep -q '</head>' "$page" || { echo "finish: $page has no </head>" >&2; exit 1; }
sed -i "s#</head>#$tag</head>#" "$page"
rm -f "$page.gz" "$page.br"
gzip -9 -k -n "$page"
done
# find -exec rather than grep --include, which busybox's grep does not know.
tagged=$(find "$dist" -name '*.html' -exec grep -lF "$tag" {} + | wc -l)
[ "$tagged" -eq "$pages" ] || { echo "finish: $tagged of $pages pages carry the tag" >&2; exit 1; }
stale=$(find "$dist" -name '*.html.br' | wc -l)
[ "$stale" -eq 0 ] || { echo "finish: $stale brotli copies left" >&2; exit 1; }
for conf in security-headers.conf security-headers-docs.conf; do
sed -E -i 's# https?:(//[^ ;"]*)?##g' "$app/$conf"
if grep -Eq 'https?:' "$app/$conf"; then
echo "finish: $conf still names a host:" >&2
grep -Eo 'https?:[^ ;"]*' "$app/$conf" >&2
exit 1
fi
done
echo "finish: $tagged pages tagged, CSP without hosts"
scripts/vendor.sh
Executable
+101
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@@ -0,0 +1,101 @@
#!/bin/sh
# Lays out every module BentoPDF would otherwise fetch from a CDN under one
# directory, in the layout BentoPDF's own air-gap setup produces
# (scripts/prepare-airgap.sh upstream, its generated setup.sh). Runs in the
# Dockerfile's vendor stage.
#
# vendor.sh <bentopdf-source> <vendor.lock> <out-dir>
#
# Every package comes through `npm pack --json`, which verifies the tarball
# against the registry; this script then compares that integrity with the one
# committed in vendor.lock and fails the build on any difference, so a package
# cannot change under a pinned version unnoticed. A missing input fails too:
# nothing here skips.
set -eu
src=$1
lock=$2
out=$3
OCR_FONT_URL=https://rawcdn.githack.com/googlefonts/noto-fonts/ffebf8c1ee449e544955a7e813c54f9b73848eac/hinted/ttf/NotoSans/NotoSans-Regular.ttf
OCR_FONT_SHA256=b85c38ecea8a7cfb39c24e395a4007474fa5a4fc864f6ee33309eb4948d232d5
work=$(mktemp -d)
mkdir -p "$out/pymupdf" "$out/gs" "$out/cpdf" "$out/ocr/core" "$out/ocr/lang-data" \
"$out/ocr/fonts" "$out/embedpdf"
# Packs one spec into $work and checks it against the lock. Prints the tarball.
# Always called as an assignment (t=$(pack ...)): an exit inside a command
# substitution only ends the subshell, and only an assignment hands its status
# to `set -e`.
pack() {
spec=$1
want=$(awk -v s="$spec" '$1 == s { print $2 }' "$lock")
[ -n "$want" ] || { echo "vendor: $spec is not in $lock" >&2; exit 1; }
json=$(cd "$work" && npm pack --json --silent "$spec")
got=$(printf '%s' "$json" | node -e 'let s="";process.stdin.on("data",d=>s+=d).on("end",()=>{const p=JSON.parse(s)[0];process.stdout.write(p.integrity+"\t"+p.filename)})')
[ "${got%% *}" = "$want" ] || {
echo "vendor: $spec integrity ${got%% *} differs from the lock's $want" >&2
exit 1
}
echo "$work/${got#* }"
}
# Unpacks a tarball's package/<sub> into a directory.
unpack() {
tarball=$1 sub=$2 dest=$3
tmp=$(mktemp -d)
tar -xzf "$tarball" -C "$tmp"
[ -e "$tmp/package/$sub" ] || { echo "vendor: $tarball has no package/$sub" >&2; exit 1; }
cp -R "$tmp/package/$sub"/. "$dest"/
rm -rf "$tmp"
}
# PyMuPDF and Ghostscript ship inside BentoPDF's repository, at the pinned commit.
set -- "$src"/bentopdf-airgap-bundle/bentopdf-pymupdf-wasm-*.tgz
[ -f "$1" ] || { echo "vendor: no PyMuPDF tarball in $src/bentopdf-airgap-bundle" >&2; exit 1; }
unpack "$1" . "$out/pymupdf"
set -- "$src"/bentopdf-airgap-bundle/bentopdf-gs-wasm-*.tgz
[ -f "$1" ] || { echo "vendor: no Ghostscript tarball in $src/bentopdf-airgap-bundle" >&2; exit 1; }
# Two loaders read this one directory: BentoPDF's own wants gs.js and gs.wasm
# at its root (upstream's air-gap layout copies only assets/), PyMuPDF's wrapper
# wants the package's dist/index.js under it - pdf-to-docx asked for
# /wasm/gs/dist/index.js and got a 404. The whole package, plus links at the
# root, serves both from one copy.
unpack "$1" . "$out/gs"
ln -s assets/gs.js "$out/gs/gs.js"
ln -s assets/gs.wasm "$out/gs/gs.wasm"
t=$(pack coherentpdf@2.5.5)
unpack "$t" dist "$out/cpdf"
tmp=$(mktemp -d)
t=$(pack tesseract.js@7.0.0)
tar -xzf "$t" -C "$tmp"
cp "$tmp/package/dist/worker.min.js" "$out/ocr/worker.min.js"
rm -rf "$tmp"
t=$(pack tesseract.js-core@7.0.0)
unpack "$t" . "$out/ocr/core"
for lang in deu fra ita eng; do
tmp=$(mktemp -d)
t=$(pack "@tesseract.js-data/$lang@1.0.0")
tar -xzf "$t" -C "$tmp"
cp "$tmp/package/4.0.0_best_int/$lang.traineddata.gz" "$out/ocr/lang-data/"
rm -rf "$tmp"
done
wget -q -O "$out/ocr/fonts/NotoSans-Regular.ttf" "$OCR_FONT_URL"
echo "$OCR_FONT_SHA256 $out/ocr/fonts/NotoSans-Regular.ttf" | sha256sum -c -s || {
echo "vendor: the OCR font's checksum differs from $OCR_FONT_SHA256" >&2
exit 1
}
# The PDF editor asks for <base>/fonts-latin@1.0.0/fonts/NotoSans-Regular.ttf.
for pkg in latin arabic hebrew; do
mkdir -p "$out/embedpdf/fonts-$pkg@1.0.0"
t=$(pack "@embedpdf/fonts-$pkg@1.0.0")
unpack "$t" . "$out/embedpdf/fonts-$pkg@1.0.0"
done
rm -rf "$work"
echo "vendor: $(find "$out" -type f | wc -l) files, $(du -sh "$out" | cut -f1)"
test/Dockerfile
+13
View File
@@ -0,0 +1,13 @@
# The gate's own image (test/zero-hosts.mjs): Chromium and playwright-core,
# with the test files and the glue baked in, because the CI runner passes the
# host's Docker socket through and a mounted workspace would be empty.
FROM public.ecr.aws/docker/library/node:20-alpine
RUN apk add --no-cache chromium
WORKDIR /gate
RUN npm init -y >/dev/null && npm install --no-audit --no-fund --silent playwright-core@1.63.0
COPY test/ ./test/
COPY glue/ ./glue/
RUN node --check glue/handoff.js
ENV PLAYWRIGHT_CORE=/gate/node_modules/playwright-core/index.mjs \
CHROMIUM=/usr/bin/chromium-browser
CMD ["node", "test/zero-hosts.mjs"]
test/fixtures/probe.pdf
Vendored
+30
View File
@@ -0,0 +1,30 @@
%PDF-1.4
1 0 obj
<</Type/Catalog/Pages 2 0 R>>
endobj
2 0 obj
<</Type/Pages/Kids[3 0 R]/Count 1>>
endobj
3 0 obj
<</Type/Page/Parent 2 0 R/MediaBox[0 0 595 842]/Contents 4 0 R/Resources<</Font<</F1 5 0 R>>>>>>
endobj
4 0 obj
<</Length 49>>stream
BT /F1 24 Tf 72 760 Td (Regierapport Probe) Tj ET
endstream
endobj
5 0 obj
<</Type/Font/Subtype/Type1/BaseFont/Helvetica>>
endobj
xref
0 6
0000000000 65535 f
0000000009 00000 n
0000000054 00000 n
0000000105 00000 n
0000000217 00000 n
0000000313 00000 n
trailer<</Size 6/Root 1 0 R>>
startxref
376
%%EOF
test/fixtures/probe.png
Vendored
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test/zero-hosts.mjs
+139
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// The gate this repository exists for (bau-pm PLAN.md §2.50, decision 2): a
// page of the PDF tools may talk to its own origin and to nobody else.
//
// node test/zero-hosts.mjs <base-url> [chromium-path]
//
// 1. The Content-Security-Policy of the start page names no host.
// 2. Every id config.json disables names a real page, and that page offers
// no tool.
// 3. Every tool page linked from the German overview is opened in a phone-sized
// Chromium, given a probe file its input accepts, and its main button
// pressed. Any request to another origin fails the gate, and so does any CSP
// violation, because a blocked request is a tool that tried to call out.
//
// Exits 0 when nothing left the origin, 1 otherwise, 2 when it could not run.
// Fed the stock upstream image once, it must fail (see README, "The gate").
import { readFileSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
const here = dirname(fileURLToPath(import.meta.url));
const base = (process.argv[2] || '').replace(/\/$/, '');
const executablePath = process.argv[3] || process.env.CHROMIUM || '/usr/bin/chromium';
if (!base) {
console.error('usage: zero-hosts.mjs <base-url> [chromium]');
process.exit(2);
}
const { chromium } = await import(process.env.PLAYWRIGHT_CORE || 'playwright-core');
const origin = new URL(base).origin;
const probes = {
pdf: readFileSync(join(here, 'fixtures/probe.pdf')),
png: readFileSync(join(here, 'fixtures/probe.png')),
};
const failures = [];
// --- 1. the header -----------------------------------------------------------
const head = await fetch(`${base}/de/`);
const csp = head.headers.get('content-security-policy') || '';
if (!csp) failures.push('start page: no Content-Security-Policy');
for (const host of csp.match(/https?:[^\s;]*/g) || []) {
failures.push(`CSP names a host: ${host}`);
}
// --- 2. the disabled tools exist, and are disabled ----------------------------
// A misspelled id in config.json disables nothing and says nothing (found on
// the first run: `digital-sign` for the page digital-sign-pdf.html), so every
// id must name a real page, and that page must not offer its tool.
const config = await (await fetch(`${base}/config.json`)).json();
const disabled = config.disabledTools || [];
if (disabled.length === 0) failures.push('config.json disables no tool');
// --- 3. every tool -----------------------------------------------------------
// The origin counts as secure even over plain HTTP on a CI network, so the
// page is cross-origin isolated as it is behind TLS in production, and the
// Office tools run the code they run there rather than a fallback.
const browser = await chromium.launch({
executablePath,
args: ['--no-sandbox', `--unsafely-treat-insecure-origin-as-secure=${origin}`],
});
const overview = await browser.newPage();
await overview.goto(`${base}/de/`, { waitUntil: 'networkidle' });
const tools = [...new Set(await overview.$$eval('a[href$=".html"]', (links) =>
links.map((a) => new URL(a.href, location.href)).filter((u) => u.origin === location.origin)
.map((u) => u.pathname).filter((p) => p.startsWith('/de/'))))].sort();
await overview.close();
for (const id of disabled) {
const page = await browser.newPage();
const response = await page.goto(`${base}/de/${id}.html`, { waitUntil: 'networkidle' });
if (!response || response.status() !== 200) failures.push(`disabled tool ${id}: no page /de/${id}.html`);
else if (await page.$('input[type=file]:visible')) failures.push(`disabled tool ${id}: still offers its file input`);
if (tools.includes(`/de/${id}.html`)) failures.push(`disabled tool ${id}: still linked from the overview`);
await page.close();
}
if (tools.length < 50) failures.push(`only ${tools.length} tool pages found on /de/`);
function probeFor(accept) {
if (/pdf/i.test(accept)) return { name: 'probe.pdf', mimeType: 'application/pdf', buffer: probes.pdf };
if (/image|png|jpe?g/i.test(accept)) return { name: 'probe.png', mimeType: 'image/png', buffer: probes.png };
return null;
}
async function run(path) {
const context = await browser.newContext({ viewport: { width: 412, height: 915 }, isMobile: true, hasTouch: true });
await context.addInitScript(() => {
window.__violations = [];
document.addEventListener('securitypolicyviolation', (e) =>
window.__violations.push(`${e.violatedDirective} ${e.blockedURI}`));
});
const page = await context.newPage();
const outside = new Set();
page.on('request', (request) => {
const url = request.url();
if (/^(data|blob|about):/.test(url)) return;
if (new URL(url).origin !== origin) outside.add(url);
});
page.on('dialog', (dialog) => dialog.dismiss().catch(() => {}));
try {
await page.goto(base + path, { waitUntil: 'networkidle', timeout: 30000 });
const input = await page.$('input[type=file]');
const file = input && probeFor((await input.getAttribute('accept')) || '');
if (file) {
await input.setInputFiles(file);
await page.waitForTimeout(2500);
const button = await page.$('#process-btn:visible');
if (button) {
await button.click({ timeout: 5000 }).catch(() => {});
await page.waitForTimeout(5000);
}
}
await page.waitForLoadState('networkidle', { timeout: 15000 }).catch(() => {});
const violations = await page.evaluate(() => window.__violations);
for (const v of violations) failures.push(`${path}: CSP violation ${v}`);
} catch (error) {
// A page that cannot be driven is not a leak; it is reported, not failed.
console.log(` note ${path}: ${error.message.split('\n')[0]}`);
}
for (const url of outside) failures.push(`${path}: request to ${url}`);
await context.close();
return outside.size;
}
let done = 0;
const queue = [...tools];
await Promise.all(Array.from({ length: 4 }, async () => {
while (queue.length) {
const path = queue.shift();
await run(path);
done += 1;
}
}));
await browser.close();
console.log(`zero-hosts: ${done} tool pages driven against ${origin}, CSP: ${csp ? 'present' : 'missing'}`);
if (failures.length) {
for (const f of [...new Set(failures)]) console.log(` FAIL ${f}`);
console.log(`zero-hosts: ${new Set(failures).size} failure(s)`);
process.exit(1);
}
console.log('zero-hosts: nothing left the origin');
vendor.lock
+23
View File
@@ -0,0 +1,23 @@
# Every module BentoPDF would otherwise load from cdn.jsdelivr.net at runtime,
# pinned by version and by the registry's integrity hash. The Dockerfile's
# vendor stage packs each one with `npm pack --json` and refuses the build when
# the integrity it receives differs from the one written here. One line per
# package: <spec> <integrity>.
#
# PyMuPDF (@bentopdf/pymupdf-wasm 0.11.16) and Ghostscript (@bentopdf/gs-wasm
# 0.1.1) are not listed: BentoPDF ships both tarballs in its own repository
# (bentopdf-airgap-bundle/), so they come from the pinned commit.
#
# Left out on purpose: the CJK fallback fonts of the PDF editor
# (@embedpdf/fonts-jp, -kr, -sc, -tc, 30 to 42 MB each). A document that needs
# them asks this server and gets a 404, never a third party.
coherentpdf@2.5.5 sha512-AAD3RG7lq2n34AtH352sbNDhJ82yfp2vFUp63/+Vu7snAqW0vyvY33XuhZdj6ubZUlFe1DNSSEaYcyc7+jTJ5Q==
tesseract.js@7.0.0 sha512-exPBkd+z+wM1BuMkx/Bjv43OeLBxhL5kKWsz/9JY+DXcXdiBjiAch0V49QR3oAJqCaL5qURE0vx9Eo+G5YE7mA==
tesseract.js-core@7.0.0 sha512-WnNH518NzmbSq9zgTPeoF8c+xmilS8rFIl1YKbk/ptuuc7p6cLNELNuPAzcmsYw450ca6bLa8j3t0VAtq435Vw==
@tesseract.js-data/deu@1.0.0 sha512-3ter1p2gFAiCd5CMC+PodZ9YY2UDomkKj+ytlKeeZqOUmhLx1SDnYPf5zog0g5MBbxYveW+8omI3PUflqHfZ4Q==
@tesseract.js-data/fra@1.0.0 sha512-pp58gMaoyidoBBLd5y5rnf0WW0Y1994QrGqZrYatITqIU/AReUJMykD+YY3JDgvnmgz7uAx1UmhjjuyEmV8JEA==
@tesseract.js-data/ita@1.0.0 sha512-Sx19NVYve5VAxEBDL6CWTX+evlvzV+iAS5ejJywcHVsmir/C9Tzw2fExoh97QFc06t48tYZA8VrMobsBzMAEhA==
@tesseract.js-data/eng@1.0.0 sha512-mbTumm6KQPUHyzTPQaF3ObXYnx0SqqfV2nabqFVQBwD6Kl7PhGSLSzOlfFTWy0P3BjghaSKA2W9GB19Jk+ZcTg==
@embedpdf/fonts-latin@1.0.0 sha512-LLYysdr8O6sRNzhmW3PbF3AeA8xnqvOi4XLFfIfNlW5uEZ+qsJdcfd78Q78sFJMhlaOAYFMziMMsnOzmx463rA==
@embedpdf/fonts-arabic@1.0.0 sha512-SnGvQb+LwPZQO2WjjvlmXrJZolJUfLYbLZQSaYUw1vrQyMyJKT4LewvJGG+hZ+Yz2fz7OMIQ+4Gc98mGODZtOg==
@embedpdf/fonts-hebrew@1.0.0 sha512-5HVAKGL7VqPeTxxADDrSqAFBxfmAXdP8fIqrPwJIKkqdK2643bOer8CqnnpO3/nPoFhkzxhttWMB9BGiqSW62w==