From bfd64221491e9b5fee5da5f9c12389e8874ea256 Mon Sep 17 00:00:00 2001 From: Albrecht Degering Date: Tue, 1 Sep 2026 02:39:44 +0200 Subject: [PATCH] Release Privacy Tools 0.1.0 --- .gitignore | 9 + .npmrc | 1 + CHANGELOG.md | 21 + CONTRIBUTING.md | 3 + LICENSE | 674 +++++ LICENSES/README.md | 3 + README.md | 118 + SECURITY.md | 33 + SOURCE.md | 23 + THIRD_PARTY_NOTICES.md | 23 + docs/ACCESSIBILITY.md | 16 + docs/ARCHITECTURE.md | 49 + docs/PRIVACY-SECURITY.md | 59 + eslint.config.mjs | 37 + index.html | 19 + package-lock.json | 3524 ++++++++++++++++++++++ package.json | 73 + playwright.config.ts | 21 + public/CHANGELOG.md | 21 + public/CONTRIBUTING.md | 3 + public/LICENSE | 674 +++++ public/LICENSES/README.md | 3 + public/LICENSES/npm-runtime-licenses.txt | 1583 ++++++++++ public/README.md | 118 + public/SECURITY.md | 33 + public/SOURCE.md | 23 + public/THIRD_PARTY_NOTICES.md | 23 + public/docs/ACCESSIBILITY.md | 16 + public/docs/ARCHITECTURE.md | 49 + public/docs/PRIVACY-SECURITY.md | 59 + public/favicon.svg | 1 + public/manifest.webmanifest | 18 + public/sw.js | 54 + public/toolbox-app.json | 41 + scripts/generate-toolbox-manifest.mjs | 33 + scripts/package-release.mjs | 165 + scripts/prepare-release-files.mjs | 70 + scripts/serve-test.mjs | 66 + src/App.tsx | 35 + src/components/ErrorBoundary.tsx | 27 + src/components/HelpDialog.tsx | 77 + src/components/Workbench.tsx | 687 +++++ src/main.tsx | 18 + src/privacy/archive.ts | 121 + src/privacy/detect.ts | 149 + src/privacy/exif-reader-adapter.ts | 141 + src/privacy/findings.ts | 159 + src/privacy/index.ts | 7 + src/privacy/inflate.ts | 29 + src/privacy/iptc.ts | 128 + src/privacy/jpeg.ts | 323 ++ src/privacy/limits.ts | 73 + src/privacy/model.ts | 156 + src/privacy/png.ts | 359 +++ src/privacy/sanitize.ts | 435 +++ src/privacy/scan-client.ts | 112 + src/privacy/scanner.ts | 151 + src/privacy/tiff.ts | 346 +++ src/privacy/webp.ts | 189 ++ src/privacy/xmp.ts | 94 + src/styles.css | 757 +++++ src/test/setup.ts | 8 + src/toolbox/manifest.source.json | 41 + src/toolbox/manifest.ts | 4 + src/version.ts | 1 + src/vite-env.d.ts | 1 + src/worker/protocol.ts | 21 + src/worker/scan.worker.ts | 31 + tests/browser/app.spec.ts | 166 + tests/components/app.test.tsx | 18 + tests/fixtures/images.ts | 253 ++ tests/privacy/detect.test.ts | 48 + tests/privacy/limits.test.ts | 40 + tests/privacy/report.test.ts | 207 ++ tests/privacy/scanner.test.ts | 236 ++ tsconfig.app.json | 27 + tsconfig.json | 11 + tsconfig.node.json | 24 + vite.config.ts | 16 + 79 files changed, 13485 insertions(+) create mode 100644 .gitignore create mode 100644 .npmrc create mode 100644 CHANGELOG.md create mode 100644 CONTRIBUTING.md create mode 100644 LICENSE create mode 100644 LICENSES/README.md create mode 100644 README.md create mode 100644 SECURITY.md create mode 100644 SOURCE.md create mode 100644 THIRD_PARTY_NOTICES.md create mode 100644 docs/ACCESSIBILITY.md create mode 100644 docs/ARCHITECTURE.md create mode 100644 docs/PRIVACY-SECURITY.md create mode 100644 eslint.config.mjs create mode 100644 index.html create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 playwright.config.ts create mode 100644 public/CHANGELOG.md create mode 100644 public/CONTRIBUTING.md create mode 100644 public/LICENSE create mode 100644 public/LICENSES/README.md create mode 100644 public/LICENSES/npm-runtime-licenses.txt create mode 100644 public/README.md create mode 100644 public/SECURITY.md create mode 100644 public/SOURCE.md create mode 100644 public/THIRD_PARTY_NOTICES.md create mode 100644 public/docs/ACCESSIBILITY.md create mode 100644 public/docs/ARCHITECTURE.md create mode 100644 public/docs/PRIVACY-SECURITY.md create mode 100644 public/favicon.svg create mode 100644 public/manifest.webmanifest create mode 100644 public/sw.js create mode 100644 public/toolbox-app.json create mode 100644 scripts/generate-toolbox-manifest.mjs create mode 100644 scripts/package-release.mjs create mode 100644 scripts/prepare-release-files.mjs create mode 100644 scripts/serve-test.mjs create mode 100644 src/App.tsx create mode 100644 src/components/ErrorBoundary.tsx create mode 100644 src/components/HelpDialog.tsx create mode 100644 src/components/Workbench.tsx create mode 100644 src/main.tsx create mode 100644 src/privacy/archive.ts create mode 100644 src/privacy/detect.ts create mode 100644 src/privacy/exif-reader-adapter.ts create mode 100644 src/privacy/findings.ts create mode 100644 src/privacy/index.ts create mode 100644 src/privacy/inflate.ts create mode 100644 src/privacy/iptc.ts create mode 100644 src/privacy/jpeg.ts create mode 100644 src/privacy/limits.ts create mode 100644 src/privacy/model.ts create mode 100644 src/privacy/png.ts create mode 100644 src/privacy/sanitize.ts create mode 100644 src/privacy/scan-client.ts create mode 100644 src/privacy/scanner.ts create mode 100644 src/privacy/tiff.ts create mode 100644 src/privacy/webp.ts create mode 100644 src/privacy/xmp.ts create mode 100644 src/styles.css create mode 100644 src/test/setup.ts create mode 100644 src/toolbox/manifest.source.json create mode 100644 src/toolbox/manifest.ts create mode 100644 src/version.ts create mode 100644 src/vite-env.d.ts create mode 100644 src/worker/protocol.ts create mode 100644 src/worker/scan.worker.ts create mode 100644 tests/browser/app.spec.ts create mode 100644 tests/components/app.test.tsx create mode 100644 tests/fixtures/images.ts create mode 100644 tests/privacy/detect.test.ts create mode 100644 tests/privacy/limits.test.ts create mode 100644 tests/privacy/report.test.ts create mode 100644 tests/privacy/scanner.test.ts create mode 100644 tsconfig.app.json create mode 100644 tsconfig.json create mode 100644 tsconfig.node.json create mode 100644 vite.config.ts diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..177f475 --- /dev/null +++ b/.gitignore @@ -0,0 +1,9 @@ +node_modules/ +dist/ +release/*.zip +release/*.zip.sha256 +coverage/ +playwright-report/ +test-results/ +*.tsbuildinfo +.DS_Store diff --git a/.npmrc b/.npmrc new file mode 100644 index 0000000..7e977af --- /dev/null +++ b/.npmrc @@ -0,0 +1 @@ +@add-ideas:registry=https://git.add-ideas.de/api/packages/lotobo/npm/ diff --git a/CHANGELOG.md b/CHANGELOG.md new file mode 100644 index 0000000..e911593 --- /dev/null +++ b/CHANGELOG.md @@ -0,0 +1,21 @@ +# Changelog + +## 0.1.0 - 2026-09-01 + +- Added byte-signature inventory, claimed-vs-detected media types, safe names, + SHA-256 hashes, and bounded batches. +- Added project-owned JPEG, PNG, WebP, EXIF/TIFF, IPTC, and XMP scanners with + explicit structural and decompression limits. +- Added ExifReader as a second scanner and best-effort inspect-only coverage for + TIFF, HEIC/HEIF, AVIF, and JPEG XL. +- Added categorized metadata findings, coverage and warning reports, including + selected colour-profile, thumbnail, trailing-data, MPF, JUMBF, and C2PA + indicators. +- Added orientation-normalized pixel re-encoding for supported static JPEG, PNG, + and WebP images, followed by mandatory output hashing, independent re-scan, + dimension/orientation checks, and a bounded pixel-sample comparison. +- Added individual outputs, deterministic JSON reports, bounded batch ZIPs, + cancellation, Toolbox shell integration, offline static packaging, and + explicit no-anonymity boundaries. +- Added generated format/adversarial fixtures, unit gates, and Chromium/Firefox + nested-path and no-network browser gates. diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md new file mode 100644 index 0000000..1438c5d --- /dev/null +++ b/CONTRIBUTING.md @@ -0,0 +1,3 @@ +# Contributing + +Run `npm ci`, `npm run check`, and `npm run test:browser` before proposing a change. 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No Surrender of Others' Freedom. + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. 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If the +Program specifies that a certain numbered version of the GNU General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY +OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, +THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM +IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF +ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + 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. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU 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 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + 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 GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/LICENSES/README.md b/LICENSES/README.md new file mode 100644 index 0000000..efbd7a1 --- /dev/null +++ b/LICENSES/README.md @@ -0,0 +1,3 @@ +# Licences + +The application is GPL-3.0-or-later. Generated release artifacts include an exact runtime dependency licence inventory in `npm-runtime-licenses.txt`. diff --git a/README.md b/README.md new file mode 100644 index 0000000..a1c415f --- /dev/null +++ b/README.md @@ -0,0 +1,118 @@ +# Privacy Tools + +Privacy Tools is a standalone, local-first browser workbench for inspecting +image metadata and producing deliberately re-encoded sharing copies. It is part +of the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal), but +the static release also runs independently at any nested path. + +Selected files stay in the browser. There are no accounts, analytics, remote +lookups, telemetry, or runtime network calls. A source file is never modified. + +## Version 0.1 workflow + +1. Select or drop a bounded batch. Every file gets a safe display/download name, + SHA-256 hash, byte-signature type detection, and claimed-vs-detected type + result. +2. Review categorized findings, parser coverage, dimensions, animation or + multi-image status, and warnings. +3. For a supported static JPEG, PNG, or WebP, explicitly re-encode the decoded + pixels. EXIF orientation is normalized; source container blocks, embedded + thumbnails, trailing bytes, and source profiles are not copied. +4. An independently parsed output is mandatory. The result states what was + removed, preserved, generated, unsupported, or incompletely checked, and + includes source/output SHA-256 hashes and a bounded decoded-pixel sample + comparison. +5. Download an individual re-encoded image, a JSON report, or a ZIP containing + re-encoded images and the report. The report itself may be sensitive because + it contains source filenames and metadata values. + +## Format support + +| Format | Inventory | Deep project scan | Secondary scan | Pixel re-encode | +| ------------------------------------------- | --------- | -------------------------------------------------------------------------------------------------------------------------- | --------------------------------- | ------------------------------------------ | +| Static JPEG | Yes | EXIF/TIFF, IPTC/Photoshop, XMP, JFIF, ICC, COM, MPF, selected JUMBF/C2PA and trailing bytes | ExifReader | JPEG | +| Static PNG | Yes | tEXt, zTXt, iTXt/XMP, eXIf/TIFF, iCCP, pHYs, tIME, private/unknown ancillary chunks, selected caBX/C2PA and trailing bytes | ExifReader | PNG | +| Static WebP | Yes | RIFF/VP8 dimensions, EXIF/TIFF, XMP, ICC, META, animation and trailing bytes | ExifReader | WebP where the browser encoder supports it | +| TIFF, HEIC/HEIF, AVIF, JPEG XL | Yes | No | Best-effort ExifReader inspection | No | +| GIF | Yes | No | No supported deep adapter | No | +| PDF, ZIP/Office, OLE/legacy Office, unknown | Yes | No | No | No | + +Animation, multi-picture JPEG/MPF, and malformed or partially scanned +JPEG/PNG/WebP inputs are inspect-only. Secondary coverage depends on what +ExifReader can establish for the particular container. A browser may decode a +format it cannot encode; that still does not make it eligible for output. + +Findings are grouped as location; people/authorship/rights; dates; device, +serial and lens; software/history; document identifiers; comments/titles/ +keywords; embedded previews; colour profiles; provenance; technical; or +unclassified. Raw XMP is shown only as bounded inert text—never injected as +markup. + +## Security boundaries and limits + +Inputs are untrusted. Container parsing runs in a terminable worker and checks +declared lengths, CRCs, offsets, TIFF cycles/depth/counts, chunk/segment counts, +compressed metadata expansion, dimensions, and aggregate batch size before +continuing. Defaults are 100 files, 128 MiB per file, 512 MiB per batch, 4,096 +metadata blocks/findings, 8 MiB per metadata block, 4 MiB decompressed metadata, +512-character labels, 16,384-character values, 256 KiB normalized finding text +per file, 40 megapixels, a 32,768-pixel edge, and a 256 MiB ZIP payload. + +The pixel decode/encode step uses browser-native image and Canvas APIs. It runs +only after a complete project scan and bounded dimensions. The output gate does +not trust successful encoding: it hashes and scans the newly encoded bytes +again. C2PA/JUMBF provenance is authenticity information rather than ordinary +tracking metadata; pixel re-encoding removes or invalidates it, and the report +calls that out. + +This is not an anonymity tool. Metadata removal does not remove visible faces +or text, steganography, invisible or forensic watermarks, reverse-image +matching, sidecar files, filesystem history, application caches, or cloud and +recipient copies. JPEG and lossy WebP output may alter pixels. Colour profiles, +resolution metadata, and provenance may be lost. Inspect the actual output and +report before sharing it. + +See [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md) and +[docs/PRIVACY-SECURITY.md](docs/PRIVACY-SECURITY.md) for the implementation and +threat model. + +## Browser and accessibility support + +Current evergreen Chromium and Firefox are exercised in the browser gate; +current Safari is an intended target. JavaScript modules, Web Workers, Blob, +Canvas 2D, `createImageBitmap` where available, and Web Crypto are used. WebP +output follows browser encoder support. The application supports the shared +Toolbox system/light/dark themes, keyboard file selection, native table and +disclosure semantics, visible focus, live progress, and non-colour status text. + +## Development + +Requirements: Node.js 22 or newer and npm 11 or newer. + +```sh +npm ci +npm run check +npm run test:browser +npm run dev +``` + +Vite uses `base: './'`, so `dist/` can be hosted at `/` or below a nested +Toolbox path. `toolbox-check` validates the production manifest and bundle. + +## Release + +```sh +npm run release:artifact +``` + +This checks the manifest, types, lint, formatting, unit fixtures, production +build, Toolbox contract, and Chromium/Firefox workflows, then creates the +deterministic `release/privacy-tools-0.1.0.zip` plus its SHA-256 sidecar. The +archive contains the static application, project documents, and exact runtime +dependency licence texts. + +## Licence + +Privacy Tools is free software under `GPL-3.0-or-later`; see [LICENSE](LICENSE). +Runtime dependencies keep their licences, including ExifReader under MPL-2.0. +See [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md). diff --git a/SECURITY.md b/SECURITY.md new file mode 100644 index 0000000..63624f0 --- /dev/null +++ b/SECURITY.md @@ -0,0 +1,33 @@ +# Security + +Report vulnerabilities privately to the repository owner. Do not attach a +sensitive source image, generated report, or real metadata to a public issue; +construct a minimal synthetic reproduction instead. + +## Input model + +Every selected file and every metadata value is untrusted. The application +detects containers from bytes, does not execute imported content, renders text +through React rather than raw HTML, performs no metadata-linked fetches, and +does not preserve source blocks in a re-encoded output. The scanning worker can +be terminated on cancellation. Browser-native pixel decoding remains part of +the browser's trusted computing base. + +Default bounds cover file/batch bytes, container blocks, individual metadata, +decompressed PNG metadata, finding lengths/counts, TIFF offsets/entries/depth, +pixel count/edge, and batch ZIP size. Malformed structures become partial or +failed coverage; they must never receive clean-copy eligibility or a verified +output result. + +## Output model + +A successful Canvas encode is not sufficient. The new bytes are independently +hashed and scanned, expected oriented dimensions are checked, sensitive or +provenance findings fail the verification gate, and incomplete coverage is +reported. C2PA/JUMBF signatures are expected to be removed or invalidated by +pixel re-encoding. Reports and output names are escaped/sanitized and ZIP paths +are application-generated. + +No status is an anonymity guarantee. Visible content, steganography, invisible +watermarks, image fingerprinting, sidecars, local filesystem metadata, browser +history, and remote copies are outside the scan. diff --git a/SOURCE.md b/SOURCE.md new file mode 100644 index 0000000..618fc8c --- /dev/null +++ b/SOURCE.md @@ -0,0 +1,23 @@ +# Corresponding source + +The corresponding source for Privacy Tools 0.1.0 is published at: + +https://git.add-ideas.de/lotobo/privacy-tools/src/tag/v0.1.0 + +Build with Node.js 22 and npm 11: + +```sh +npm ci +npm run release:artifact +``` + +The release command performs all source, test, browser, manifest, and Toolbox +checks before assembling the deterministic static ZIP. The artifact includes +this file, the GPL licence, project documentation, and the runtime dependency +licence texts generated from the exact lockfile. + +ExifReader 4.44.0 is unmodified MPL-2.0 covered software within the bundled +application. Its preferred source form is available from the exact npm package +and upstream release identified in `package-lock.json` and +`THIRD_PARTY_NOTICES.md`; its MPL licence text is included in the generated +runtime licence inventory. diff --git a/THIRD_PARTY_NOTICES.md b/THIRD_PARTY_NOTICES.md new file mode 100644 index 0000000..ef8a284 --- /dev/null +++ b/THIRD_PARTY_NOTICES.md @@ -0,0 +1,23 @@ +# Third-party notices + +Privacy Tools is GPL-3.0-or-later. Dependencies retain their own licences. A +production build generates `LICENSES/npm-runtime-licenses.txt` from the exact +locked runtime packages and copies every available licence/notice text into the +release. + +Material runtime components include: + +| Component | Version | Licence | Purpose/source | +| -------------------------------- | ------- | ---------------- | -------------------------------------------------------------------------------------------------- | +| ExifReader | 4.44.0 | MPL-2.0 | Secondary metadata parser; | +| fflate | 0.8.2 | MIT | Bounded PNG metadata inflation and ZIP creation; | +| `@add-ideas/toolbox-helpers` | 0.1.0 | GPL-3.0-or-later | Hashing, safe names, download and deterministic JSON primitives | +| `@add-ideas/toolbox-contract` | 0.2.3 | Apache-2.0 | Toolbox manifest contract | +| `@add-ideas/toolbox-shell-react` | 0.2.3 | Apache-2.0 | Shared application shell | +| React / React DOM | 19.2.8 | MIT | User interface | + +ExifReader is used unmodified. Its MPL-2.0 covered source remains available at +the exact upstream link above and through the npm package resolved by the +lockfile. The bundled executable does not relicense or restrict the MPL-covered +files. Consult the generated licence inventory for the full MPL-2.0 text and +the exact notices shipped with every runtime package. diff --git a/docs/ACCESSIBILITY.md b/docs/ACCESSIBILITY.md new file mode 100644 index 0000000..f1afd0e --- /dev/null +++ b/docs/ACCESSIBILITY.md @@ -0,0 +1,16 @@ +# Accessibility + +The workbench uses semantic landmarks, headings, a native multiple-file input, +buttons, tables, definition lists, progress, status/alert regions, and native +disclosures/dialogs. All workflows are keyboard operable; drop is an optional +pointer shortcut. Visible focus and the shared Toolbox system/light/dark themes +are preserved. + +Status is always written as text and never encoded by colour alone. Finding +categories expose labels and counts, hashes and media types remain selectable, +and responsive layouts allow horizontal table scrolling without clipping the +whole page. Motion is not required to understand progress or results. + +Automated component and Chromium/Firefox browser gates cover semantics and core +workflows. They supplement, rather than replace, manual keyboard, zoom, +screen-reader, high-contrast, and reduced-motion review before release. diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md new file mode 100644 index 0000000..8affc35 --- /dev/null +++ b/docs/ARCHITECTURE.md @@ -0,0 +1,49 @@ +# Architecture + +Privacy Tools is a relocatable Vite/React static application. The core domain +model in `src/privacy` is serializable: scan inputs cross a worker boundary as +transferred `ArrayBuffer`s and results contain only strings, numbers, booleans, +arrays, and plain objects. No parser returns HTML or a live third-party object. + +## Pipeline + +1. `scan-client` checks file count and declared byte totals before reading the + batch, transfers buffers to a dedicated worker, reports progress, and + terminates the worker on cancellation. +2. `detect` compares magic bytes, filename extension, and browser-claimed MIME. + `scanner` hashes bytes, dispatches the bounded project parser, runs + ExifReader as a distinct secondary adapter, and normalizes findings and + coverage. +3. Project parsers walk JPEG segments, PNG chunks, WebP RIFF chunks, TIFF IFDs, + IPTC datasets, and bounded inert XMP text. They validate offsets, lengths, + counts, PNG CRCs, compression expansion, TIFF cycles/depth, and trailing + bytes. They do not follow URLs or instantiate XML/HTML. +4. `sanitize` runs only for complete, static, bounded JPEG/PNG/WebP scans. A + browser decoder produces pixels, the EXIF display orientation is normalized, + and Canvas creates a fresh same-format file. No input container block is + copied. +5. The encoded bytes are passed back through the same independent scanner API, + hashed, dimension-checked, and compared using a deterministic 256-pixel-edge + decoded sample. `buildSanitizationReport` assigns verified/warning/failed + based on explicit coverage and output findings. +6. `archive` serializes bounded deterministic JSON and creates stored ZIP + entries from application-generated `images/` paths and sanitized unique + names. + +Pixel decoding and Canvas encoding currently run on the main browser context +because portable cross-browser image encoder support is there; metadata parsing +and hashing run in the terminable worker. UI state does not retain data after a +page refresh and no IndexedDB/localStorage persistence is used by this app. + +## Trust boundaries + +- Project parsers and ExifReader independently contribute coverage; one parser's + success does not suppress the other's warning. +- Unknown structures are reported or cause partial coverage. Clean-copy + eligibility requires a complete project container scan. +- Browser image decoders, Canvas encoders, Web Crypto, and the JS runtime are in + the trusted computing base. +- ExifReader is pinned to 4.44.0. Dependency updates require malformed-container + regression fixtures and licence review. +- The Toolbox shell receives the application manifest but never receives file + bytes or findings. diff --git a/docs/PRIVACY-SECURITY.md b/docs/PRIVACY-SECURITY.md new file mode 100644 index 0000000..8717d5a --- /dev/null +++ b/docs/PRIVACY-SECURITY.md @@ -0,0 +1,59 @@ +# Privacy and security + +## Data handling + +Files are read with browser file APIs and transferred to an in-page worker. +There is no upload endpoint, account, telemetry, analytics, remote metadata +lookup, or automatic persistence. Temporary object URLs exist only for the +legacy image-element decode fallback and are revoked immediately after decode. +Download object URLs are created and revoked by the shared helper. Refreshing or +closing the page discards application state. + +Service-worker support may fetch and cache the same-origin application shell; +it does not cache imported files, metadata findings, reports, or generated +images. Metadata URLs and XMP/XML markup are inert text and are never fetched or +rendered as HTML. + +## What is inspected + +Every file receives byte-signature inventory and SHA-256. Static JPEG, PNG, and +WebP receive project-owned deep container parsing plus ExifReader. TIFF, +HEIC/HEIF, AVIF, and JPEG XL receive best-effort ExifReader inspection only. +GIF and document/archive formats receive inventory only. Exact per-format +fields are listed in the README support table. + +All parsers are bounded, but a “complete” scan means complete for implemented +structures—not proof that no steganographic or novel carrier exists. Unknown +private chunks and trailing bytes are surfaced. ExifReader failures and format +limitations remain visible in coverage. + +## Re-encoded outputs + +Only complete, static, dimension-bounded JPEG/PNG/WebP project scans are +eligible. The application decodes pixels, normalizes display orientation, and +uses Canvas to encode a new file of the detected type. It does not selectively +strip GPS while copying everything else, because duplicated values can live in +multiple namespaces and embedded previews. It copies no source metadata block. + +The output is always scanned and hashed again. Sensitive or provenance findings, +partial project coverage, or an oriented-dimension mismatch produce a failed +gate. Secondary-parser limitations and provenance invalidation produce explicit +warnings. JPEG and lossy WebP may change pixels; profiles, resolution metadata, +thumbnails, comments, and application history may be lost. PNG is expected to +preserve decoded pixels, subject to browser colour management. + +C2PA/JUMBF carries authenticity/provenance claims. Re-encoding normally removes +or invalidates those claims. The tool reports that effect rather than describing +it as an ordinary privacy win. + +## What this cannot promise + +No result promises anonymity or safe publication. The tool does not remove or +detect visible faces/text/locations, steganography, invisible watermarks, +camera-pattern or image fingerprints, reverse-image matches, sidecar files, +filesystem metadata, clipboard/history records, application caches, backed-up +originals, or cloud/recipient copies. Review the visible output, destination, +report, and surrounding files yourself. + +The JSON report is sensitive by design: it can include original filenames, +hashes, timestamps, and metadata values. Share or retain it only intentionally. diff --git a/eslint.config.mjs b/eslint.config.mjs new file mode 100644 index 0000000..54b1935 --- /dev/null +++ b/eslint.config.mjs @@ -0,0 +1,37 @@ +import js from "@eslint/js"; +import globals from "globals"; +import reactHooks from "eslint-plugin-react-hooks"; +import reactRefresh from "eslint-plugin-react-refresh"; +import tseslint from "typescript-eslint"; + +export default tseslint.config( + { + ignores: [ + "dist", + "release", + "coverage", + "test-results", + "playwright-report", + ], + }, + { + extends: [js.configs.recommended, ...tseslint.configs.recommended], + files: ["**/*.{ts,tsx}"], + languageOptions: { + ecmaVersion: 2023, + globals: { ...globals.browser, ...globals.worker }, + }, + plugins: { "react-hooks": reactHooks, "react-refresh": reactRefresh }, + rules: { + ...reactHooks.configs.recommended.rules, + "react-refresh/only-export-components": [ + "warn", + { allowConstantExport: true }, + ], + }, + }, + { + files: ["scripts/**/*.mjs", "playwright.config.ts"], + languageOptions: { globals: globals.node }, + }, +); diff --git a/index.html b/index.html new file mode 100644 index 0000000..cf97a7a --- /dev/null +++ b/index.html @@ -0,0 +1,19 @@ + + + + + + + + + + Privacy Tools + + +
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true + }, + "@vitest/browser-webdriverio": { + "optional": true + }, + "@vitest/coverage-istanbul": { + "optional": true + }, + "@vitest/coverage-v8": { + "optional": true + }, + "@vitest/ui": { + "optional": true + }, + "happy-dom": { + "optional": true + }, + "jsdom": { + "optional": true + }, + "vite": { + "optional": false + } + } + }, + "node_modules/w3c-xmlserializer": { + "version": "5.0.0", + "dev": true, + "license": "MIT", + "dependencies": { + "xml-name-validator": "^5.0.0" + }, + "engines": { + "node": ">=18" + } + }, + "node_modules/webidl-conversions": { + "version": "8.0.1", + "dev": true, + "license": "BSD-2-Clause", + "engines": { + "node": ">=20" + } + }, + "node_modules/whatwg-mimetype": { + "version": "5.0.0", + "dev": true, + "license": "MIT", + "engines": { + "node": ">=20" + } + }, + "node_modules/whatwg-url": { + "version": "16.0.1", + "dev": true, + "license": "MIT", + "dependencies": { + "@exodus/bytes": "^1.11.0", + "tr46": "^6.0.0", + "webidl-conversions": 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"license": "ISC" + }, + "node_modules/yocto-queue": { + "version": "0.1.0", + "dev": true, + "license": "MIT", + "engines": { + "node": ">=10" + }, + "funding": { + "url": "https://github.com/sponsors/sindresorhus" + } + }, + "node_modules/zod": { + "version": "4.5.4", + "dev": true, + "license": "MIT", + "funding": { + "url": "https://github.com/sponsors/colinhacks" + } + }, + "node_modules/zod-validation-error": { + "version": "4.0.2", + "dev": true, + "license": "MIT", + "engines": { + "node": ">=18.0.0" + }, + "peerDependencies": { + "zod": "^3.25.0 || ^4.0.0" + } + } + } +} diff --git a/package.json b/package.json new file mode 100644 index 0000000..f079fe7 --- /dev/null +++ b/package.json @@ -0,0 +1,73 @@ +{ + "name": "privacy-tools", + "version": "0.1.0", + "description": "Inspect and remove shareable-file metadata locally in the browser.", + "license": "GPL-3.0-or-later", + "author": "Albrecht Degering", + "repository": { + "type": "git", + "url": "git+https://git.add-ideas.de/lotobo/privacy-tools.git" + }, + "homepage": "https://git.add-ideas.de/lotobo/privacy-tools", + "bugs": { + "url": "https://git.add-ideas.de/lotobo/privacy-tools/issues" + }, + "private": true, + "type": "module", + "engines": { + "node": ">=22" + }, + "scripts": { + "predev": "npm run manifest:generate", + "dev": "vite", + "prebuild": "npm run release:prepare && npm run manifest:generate", + "build": "tsc -b && vite build", + "preview": "vite preview", + "typecheck": "tsc -b --pretty false", + "lint": "eslint . --max-warnings=0", + "format": "prettier --write .", + "format:check": "prettier --check .", + "test": "vitest run", + "test:watch": "vitest", + "test:browser": "playwright test", + "manifest:generate": "node scripts/generate-toolbox-manifest.mjs", + "manifest:check": "node scripts/generate-toolbox-manifest.mjs --check", + "release:prepare": "node scripts/prepare-release-files.mjs", + "toolbox:check": "toolbox-check dist", + "package:release": "node scripts/package-release.mjs", + "check": "npm run manifest:check && npm run typecheck && npm run lint && npm run format:check && npm run test && npm run build && npm run toolbox:check", + "release:artifact": "npm run check && npm run test:browser && npm run package:release -- --force" + }, + "dependencies": { + "@add-ideas/toolbox-contract": "0.2.3", + "@add-ideas/toolbox-helpers": "0.1.0", + "@add-ideas/toolbox-shell-react": "0.2.3", + "exifreader": "4.44.0", + "fflate": "0.8.2", + "react": "19.2.8", + "react-dom": "19.2.8" + }, + "devDependencies": { + "@add-ideas/toolbox-testkit": "0.2.3", + "@eslint/js": "10.0.1", + "@playwright/test": "1.62.1", + "@testing-library/jest-dom": "6.9.1", + "@testing-library/react": "16.3.2", + "@testing-library/user-event": "14.6.1", + "@types/node": "25.9.5", + "@types/react": "19.2.17", + "@types/react-dom": "19.2.5", + "@vitejs/plugin-react": "6.0.3", + "eslint": "10.7.0", + "eslint-plugin-react-hooks": "7.1.1", + "eslint-plugin-react-refresh": "0.5.2", + "globals": "17.7.0", + "jsdom": "29.1.1", + "prettier": "3.9.5", + "typescript": "6.0.3", + "typescript-eslint": "8.64.0", + "vite": "8.2.2", + "vitest": "4.1.11" + }, + "packageManager": "npm@11.17.0" +} diff --git a/playwright.config.ts b/playwright.config.ts new file mode 100644 index 0000000..731da62 --- /dev/null +++ b/playwright.config.ts @@ -0,0 +1,21 @@ +import { defineConfig, devices } from "@playwright/test"; + +export default defineConfig({ + testDir: "./tests/browser", + fullyParallel: false, + workers: 1, + timeout: 120_000, + expect: { timeout: 10_000 }, + reporter: [["list"]], + use: { baseURL: "http://127.0.0.1:4173", trace: "retain-on-failure" }, + webServer: { + command: "npm run build && node scripts/serve-test.mjs", + url: "http://127.0.0.1:4173", + reuseExistingServer: !process.env.CI, + timeout: 180_000, + }, + projects: [ + { name: "chromium", use: { ...devices["Desktop Chrome"] } }, + { name: "firefox", use: { ...devices["Desktop Firefox"] } }, + ], +}); diff --git a/public/CHANGELOG.md b/public/CHANGELOG.md new file mode 100644 index 0000000..e911593 --- /dev/null +++ b/public/CHANGELOG.md @@ -0,0 +1,21 @@ +# Changelog + +## 0.1.0 - 2026-09-01 + +- Added byte-signature inventory, claimed-vs-detected media types, safe names, + SHA-256 hashes, and bounded batches. +- Added project-owned JPEG, PNG, WebP, EXIF/TIFF, IPTC, and XMP scanners with + explicit structural and decompression limits. +- Added ExifReader as a second scanner and best-effort inspect-only coverage for + TIFF, HEIC/HEIF, AVIF, and JPEG XL. +- Added categorized metadata findings, coverage and warning reports, including + selected colour-profile, thumbnail, trailing-data, MPF, JUMBF, and C2PA + indicators. +- Added orientation-normalized pixel re-encoding for supported static JPEG, PNG, + and WebP images, followed by mandatory output hashing, independent re-scan, + dimension/orientation checks, and a bounded pixel-sample comparison. +- Added individual outputs, deterministic JSON reports, bounded batch ZIPs, + cancellation, Toolbox shell integration, offline static packaging, and + explicit no-anonymity boundaries. +- Added generated format/adversarial fixtures, unit gates, and Chromium/Firefox + nested-path and no-network browser gates. diff --git a/public/CONTRIBUTING.md b/public/CONTRIBUTING.md new file mode 100644 index 0000000..1438c5d --- /dev/null +++ b/public/CONTRIBUTING.md @@ -0,0 +1,3 @@ +# Contributing + +Run `npm ci`, `npm run check`, and `npm run test:browser` before proposing a change. Keep processing local, preserve explicit limits, and include fixtures for every parser boundary. diff --git a/public/LICENSE b/public/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/public/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. 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No Surrender of Others' Freedom. + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. 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If the +Program specifies that a certain numbered version of the GNU General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY +OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, +THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM +IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF +ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY +GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF +DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD +PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), +EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF +SUCH DAMAGES. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + 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. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU 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 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + 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 GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/public/LICENSES/README.md b/public/LICENSES/README.md new file mode 100644 index 0000000..efbd7a1 --- /dev/null +++ b/public/LICENSES/README.md @@ -0,0 +1,3 @@ +# Licences + +The application is GPL-3.0-or-later. Generated release artifacts include an exact runtime dependency licence inventory in `npm-runtime-licenses.txt`. diff --git a/public/LICENSES/npm-runtime-licenses.txt b/public/LICENSES/npm-runtime-licenses.txt new file mode 100644 index 0000000..b143f48 --- /dev/null +++ b/public/LICENSES/npm-runtime-licenses.txt @@ -0,0 +1,1583 @@ +============================================================================== +@add-ideas/toolbox-contract@0.2.3 +Declared licence: Apache-2.0 +============================================================================== +--- LICENSE --- + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of 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 reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + Copyright 2026 ADD Ideas + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + + +============================================================================== +@add-ideas/toolbox-helpers@0.1.0 +Declared licence: GPL-3.0-or-later +============================================================================== +--- LICENSE --- + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. We, the Free Software Foundation, use the +GNU General Public License for most of our software; it applies also to +any other work released this way by its authors. You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +them if you wish), that you receive source code or can get it if you +want it, that you can change the software or use pieces of it in new +free programs, and that you know you can do these things. + + To protect your rights, we need to prevent others from denying you +these rights or asking you to surrender the rights. Therefore, you have +certain responsibilities if you distribute copies of the software, or if +you modify it: responsibilities to respect the freedom of others. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must pass on to the recipients the same +freedoms that you received. You must make sure that they, too, receive +or can get the source code. And you must show them these terms so they +know their rights. + + Developers that use the GNU GPL protect your rights with two steps: +(1) assert copyright on the software, and (2) offer you this License +giving you legal permission to copy, distribute and/or modify it. + + For the developers' and authors' protection, the GPL clearly explains +that there is no warranty for this free software. For both users' and +authors' sake, the GPL requires that modified versions be marked as +changed, so that their problems will not be attributed erroneously to +authors of previous versions. + + Some devices are designed to deny users access to install or run +modified versions of the software inside them, although the manufacturer +can do so. This is fundamentally incompatible with the aim of +protecting users' freedom to change the software. The systematic +pattern of such abuse occurs in the area of products for individuals to +use, which is precisely where it is most unacceptable. Therefore, we +have designed this version of the GPL to prohibit the practice for those +products. If such problems arise substantially in other domains, we +stand ready to extend this provision to those domains in future versions +of the GPL, as needed to protect the freedom of users. + + Finally, every program is threatened constantly by software patents. +States should not allow patents to restrict development and use of +software on general-purpose computers, but in those that do, we wish to +avoid the special danger that patents applied to a free program could +make it effectively proprietary. To prevent this, the GPL assures that +patents cannot be used to render the program non-free. + + The precise terms and conditions for copying, distribution and +modification follow. + + TERMS AND CONDITIONS + + 0. Definitions. + + "This License" refers to version 3 of the GNU General Public License. + + "Copyright" also means copyright-like laws that apply to other kinds of +works, such as semiconductor masks. + + "The Program" refers to any copyrightable work licensed under this +License. Each licensee is addressed as "you". "Licensees" and +"recipients" may be individuals or organizations. + + To "modify" a work means to copy from or adapt all or part of the work +in a fashion requiring copyright permission, other than the making of an +exact copy. The resulting work is called a "modified version" of the +earlier work or a work "based on" the earlier work. + + A "covered work" means either the unmodified Program or a work based +on the Program. + + To "propagate" a work means to do anything with it that, without +permission, would make you directly or secondarily liable for +infringement under applicable copyright law, except executing it on a +computer or modifying a private copy. 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Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + + 6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + + 7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + + 8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of 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 reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + Copyright 2026 ADD Ideas + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + + +============================================================================== +@xmldom/xmldom@0.9.12 +Declared licence: MIT +============================================================================== +--- LICENSE --- +Copyright 2019 - present Christopher J. Brody and other contributors, as listed in: https://github.com/xmldom/xmldom/graphs/contributors +Copyright 2012 - 2017 @jindw and other contributors, as listed in: https://github.com/jindw/xmldom/graphs/contributors + +Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + + +============================================================================== +exifreader@4.44.0 +Declared licence: MPL-2.0 +============================================================================== +--- LICENSE --- +Mozilla Public License Version 2.0 +================================== + +1. Definitions +-------------- + +1.1. "Contributor" + means each individual or legal entity that creates, contributes to + the creation of, or owns Covered Software. + +1.2. "Contributor Version" + means the combination of the Contributions of others (if any) used + by a Contributor and that particular Contributor's Contribution. + +1.3. "Contribution" + means Covered Software of a particular Contributor. + +1.4. "Covered Software" + means Source Code Form to which the initial Contributor has attached + the notice in Exhibit A, the Executable Form of such Source Code + Form, and Modifications of such Source Code Form, in each case + including portions thereof. + +1.5. "Incompatible With Secondary Licenses" + means + + (a) that the initial Contributor has attached the notice described + in Exhibit B to the Covered Software; or + + (b) that the Covered Software was made available under the terms of + version 1.1 or earlier of the License, but not also under the + terms of a Secondary License. + +1.6. "Executable Form" + means any form of the work other than Source Code Form. + +1.7. "Larger Work" + means a work that combines Covered Software with other material, in + a separate file or files, that is not Covered Software. + +1.8. "License" + means this document. + +1.9. "Licensable" + means having the right to grant, to the maximum extent possible, + whether at the time of the initial grant or subsequently, any and + all of the rights conveyed by this License. + +1.10. "Modifications" + means any of the following: + + (a) any file in Source Code Form that results from an addition to, + deletion from, or modification of the contents of Covered + Software; or + + (b) any new file in Source Code Form that contains any Covered + Software. + +1.11. "Patent Claims" of a Contributor + means any patent claim(s), including without limitation, method, + process, and apparatus claims, in any patent Licensable by such + Contributor that would be infringed, but for the grant of the + License, by the making, using, selling, offering for sale, having + made, import, or transfer of either its Contributions or its + Contributor Version. + +1.12. "Secondary License" + means either the GNU General Public License, Version 2.0, the GNU + Lesser General Public License, Version 2.1, the GNU Affero General + Public License, Version 3.0, or any later versions of those + licenses. + +1.13. "Source Code Form" + means the form of the work preferred for making modifications. + +1.14. "You" (or "Your") + means an individual or a legal entity exercising rights under this + License. For legal entities, "You" includes any entity that + controls, is controlled by, or is under common control with You. For + purposes of this definition, "control" means (a) the power, direct + or indirect, to cause the direction or management of such entity, + whether by contract or otherwise, or (b) ownership of more than + fifty percent (50%) of the outstanding shares or beneficial + ownership of such entity. + +2. License Grants and Conditions +-------------------------------- + +2.1. Grants + +Each Contributor hereby grants You a world-wide, royalty-free, +non-exclusive license: + +(a) under intellectual property rights (other than patent or trademark) + Licensable by such Contributor to use, reproduce, make available, + modify, display, perform, distribute, and otherwise exploit its + Contributions, either on an unmodified basis, with Modifications, or + as part of a Larger Work; and + +(b) under Patent Claims of such Contributor to make, use, sell, offer + for sale, have made, import, and otherwise transfer either its + Contributions or its Contributor Version. + +2.2. Effective Date + +The licenses granted in Section 2.1 with respect to any Contribution +become effective for each Contribution on the date the Contributor first +distributes such Contribution. + +2.3. Limitations on Grant Scope + +The licenses granted in this Section 2 are the only rights granted under +this License. No additional rights or licenses will be implied from the +distribution or licensing of Covered Software under this License. +Notwithstanding Section 2.1(b) above, no patent license is granted by a +Contributor: + +(a) for any code that a Contributor has removed from Covered Software; + or + +(b) for infringements caused by: (i) Your and any other third party's + modifications of Covered Software, or (ii) the combination of its + Contributions with other software (except as part of its Contributor + Version); or + +(c) under Patent Claims infringed by Covered Software in the absence of + its Contributions. + +This License does not grant any rights in the trademarks, service marks, +or logos of any Contributor (except as may be necessary to comply with +the notice requirements in Section 3.4). + +2.4. Subsequent Licenses + +No Contributor makes additional grants as a result of Your choice to +distribute the Covered Software under a subsequent version of this +License (see Section 10.2) or under the terms of a Secondary License (if +permitted under the terms of Section 3.3). + +2.5. Representation + +Each Contributor represents that the Contributor believes its +Contributions are its original creation(s) or it has sufficient rights +to grant the rights to its Contributions conveyed by this License. + +2.6. Fair Use + +This License is not intended to limit any rights You have under +applicable copyright doctrines of fair use, fair dealing, or other +equivalents. + +2.7. Conditions + +Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted +in Section 2.1. + +3. Responsibilities +------------------- + +3.1. Distribution of Source Form + +All distribution of Covered Software in Source Code Form, including any +Modifications that You create or to which You contribute, must be under +the terms of this License. You must inform recipients that the Source +Code Form of the Covered Software is governed by the terms of this +License, and how they can obtain a copy of this License. You may not +attempt to alter or restrict the recipients' rights in the Source Code +Form. + +3.2. Distribution of Executable Form + +If You distribute Covered Software in Executable Form then: + +(a) such Covered Software must also be made available in Source Code + Form, as described in Section 3.1, and You must inform recipients of + the Executable Form how they can obtain a copy of such Source Code + Form by reasonable means in a timely manner, at a charge no more + than the cost of distribution to the recipient; and + +(b) You may distribute such Executable Form under the terms of this + License, or sublicense it under different terms, provided that the + license for the Executable Form does not attempt to limit or alter + the recipients' rights in the Source Code Form under this License. + +3.3. Distribution of a Larger Work + +You may create and distribute a Larger Work under terms of Your choice, +provided that You also comply with the requirements of this License for +the Covered Software. If the Larger Work is a combination of Covered +Software with a work governed by one or more Secondary Licenses, and the +Covered Software is not Incompatible With Secondary Licenses, this +License permits You to additionally distribute such Covered Software +under the terms of such Secondary License(s), so that the recipient of +the Larger Work may, at their option, further distribute the Covered +Software under the terms of either this License or such Secondary +License(s). + +3.4. Notices + +You may not remove or alter the substance of any license notices +(including copyright notices, patent notices, disclaimers of warranty, +or limitations of liability) contained within the Source Code Form of +the Covered Software, except that You may alter any license notices to +the extent required to remedy known factual inaccuracies. + +3.5. Application of Additional Terms + +You may choose to offer, and to charge a fee for, warranty, support, +indemnity or liability obligations to one or more recipients of Covered +Software. However, You may do so only on Your own behalf, and not on +behalf of any Contributor. You must make it absolutely clear that any +such warranty, support, indemnity, or liability obligation is offered by +You alone, and You hereby agree to indemnify every Contributor for any +liability incurred by such Contributor as a result of warranty, support, +indemnity or liability terms You offer. You may include additional +disclaimers of warranty and limitations of liability specific to any +jurisdiction. + +4. Inability to Comply Due to Statute or Regulation +--------------------------------------------------- + +If it is impossible for You to comply with any of the terms of this +License with respect to some or all of the Covered Software due to +statute, judicial order, or regulation then You must: (a) comply with +the terms of this License to the maximum extent possible; and (b) +describe the limitations and the code they affect. Such description must +be placed in a text file included with all distributions of the Covered +Software under this License. Except to the extent prohibited by statute +or regulation, such description must be sufficiently detailed for a +recipient of ordinary skill to be able to understand it. + +5. Termination +-------------- + +5.1. The rights granted under this License will terminate automatically +if You fail to comply with any of its terms. However, if You become +compliant, then the rights granted under this License from a particular +Contributor are reinstated (a) provisionally, unless and until such +Contributor explicitly and finally terminates Your grants, and (b) on an +ongoing basis, if such Contributor fails to notify You of the +non-compliance by some reasonable means prior to 60 days after You have +come back into compliance. Moreover, Your grants from a particular +Contributor are reinstated on an ongoing basis if such Contributor +notifies You of the non-compliance by some reasonable means, this is the +first time You have received notice of non-compliance with this License +from such Contributor, and You become compliant prior to 30 days after +Your receipt of the notice. + +5.2. If You initiate litigation against any entity by asserting a patent +infringement claim (excluding declaratory judgment actions, +counter-claims, and cross-claims) alleging that a Contributor Version +directly or indirectly infringes any patent, then the rights granted to +You by any and all Contributors for the Covered Software under Section +2.1 of this License shall terminate. + +5.3. In the event of termination under Sections 5.1 or 5.2 above, all +end user license agreements (excluding distributors and resellers) which +have been validly granted by You or Your distributors under this License +prior to termination shall survive termination. + +************************************************************************ +* * +* 6. Disclaimer of Warranty * +* ------------------------- * +* * +* Covered Software is provided under this License on an "as is" * +* basis, without warranty of any kind, either expressed, implied, or * +* statutory, including, without limitation, warranties that the * +* Covered Software is free of defects, merchantable, fit for a * +* particular purpose or non-infringing. The entire risk as to the * +* quality and performance of the Covered Software is with You. * +* Should any Covered Software prove defective in any respect, You * +* (not any Contributor) assume the cost of any necessary servicing, * +* repair, or correction. This disclaimer of warranty constitutes an * +* essential part of this License. No use of any Covered Software is * +* authorized under this License except under this disclaimer. * +* * +************************************************************************ + +************************************************************************ +* * +* 7. Limitation of Liability * +* -------------------------- * +* * +* Under no circumstances and under no legal theory, whether tort * +* (including negligence), contract, or otherwise, shall any * +* Contributor, or anyone who distributes Covered Software as * +* permitted above, be liable to You for any direct, indirect, * +* special, incidental, or consequential damages of any character * +* including, without limitation, damages for lost profits, loss of * +* goodwill, work stoppage, computer failure or malfunction, or any * +* and all other commercial damages or losses, even if such party * +* shall have been informed of the possibility of such damages. This * +* limitation of liability shall not apply to liability for death or * +* personal injury resulting from such party's negligence to the * +* extent applicable law prohibits such limitation. Some * +* jurisdictions do not allow the exclusion or limitation of * +* incidental or consequential damages, so this exclusion and * +* limitation may not apply to You. * +* * +************************************************************************ + +8. Litigation +------------- + +Any litigation relating to this License may be brought only in the +courts of a jurisdiction where the defendant maintains its principal +place of business and such litigation shall be governed by laws of that +jurisdiction, without reference to its conflict-of-law provisions. +Nothing in this Section shall prevent a party's ability to bring +cross-claims or counter-claims. + +9. Miscellaneous +---------------- + +This License represents the complete agreement concerning the subject +matter hereof. If any provision of this License is held to be +unenforceable, such provision shall be reformed only to the extent +necessary to make it enforceable. Any law or regulation which provides +that the language of a contract shall be construed against the drafter +shall not be used to construe this License against a Contributor. + +10. Versions of the License +--------------------------- + +10.1. New Versions + +Mozilla Foundation is the license steward. Except as provided in Section +10.3, no one other than the license steward has the right to modify or +publish new versions of this License. Each version will be given a +distinguishing version number. + +10.2. Effect of New Versions + +You may distribute the Covered Software under the terms of the version +of the License under which You originally received the Covered Software, +or under the terms of any subsequent version published by the license +steward. + +10.3. Modified Versions + +If you create software not governed by this License, and you want to +create a new license for such software, you may create and use a +modified version of this License if you rename the license and remove +any references to the name of the license steward (except to note that +such modified license differs from this License). + +10.4. Distributing Source Code Form that is Incompatible With Secondary +Licenses + +If You choose to distribute Source Code Form that is Incompatible With +Secondary Licenses under the terms of this version of the License, the +notice described in Exhibit B of this License must be attached. + +Exhibit A - Source Code Form License Notice +------------------------------------------- + + This Source Code Form is subject to the terms of the Mozilla Public + License, v. 2.0. If a copy of the MPL was not distributed with this + file, You can obtain one at https://mozilla.org/MPL/2.0/. + +If it is not possible or desirable to put the notice in a particular +file, then You may include the notice in a location (such as a LICENSE +file in a relevant directory) where a recipient would be likely to look +for such a notice. + +You may add additional accurate notices of copyright ownership. + +Exhibit B - "Incompatible With Secondary Licenses" Notice +--------------------------------------------------------- + + This Source Code Form is "Incompatible With Secondary Licenses", as + defined by the Mozilla Public License, v. 2.0. + + +============================================================================== +fflate@0.8.2 +Declared licence: MIT +============================================================================== +--- LICENSE --- +MIT License + +Copyright (c) 2023 Arjun Barrett + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + +============================================================================== +react@19.2.8 +Declared licence: MIT +============================================================================== +--- LICENSE --- +MIT License + +Copyright (c) Meta Platforms, Inc. and affiliates. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + + +============================================================================== +react-dom@19.2.8 +Declared licence: MIT +============================================================================== +--- LICENSE --- +MIT License + +Copyright (c) Meta Platforms, Inc. and affiliates. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + + +============================================================================== +scheduler@0.27.0 +Declared licence: MIT +============================================================================== +--- LICENSE --- +MIT License + +Copyright (c) Meta Platforms, Inc. and affiliates. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/public/README.md b/public/README.md new file mode 100644 index 0000000..a1c415f --- /dev/null +++ b/public/README.md @@ -0,0 +1,118 @@ +# Privacy Tools + +Privacy Tools is a standalone, local-first browser workbench for inspecting +image metadata and producing deliberately re-encoded sharing copies. It is part +of the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal), but +the static release also runs independently at any nested path. + +Selected files stay in the browser. There are no accounts, analytics, remote +lookups, telemetry, or runtime network calls. A source file is never modified. + +## Version 0.1 workflow + +1. Select or drop a bounded batch. Every file gets a safe display/download name, + SHA-256 hash, byte-signature type detection, and claimed-vs-detected type + result. +2. Review categorized findings, parser coverage, dimensions, animation or + multi-image status, and warnings. +3. For a supported static JPEG, PNG, or WebP, explicitly re-encode the decoded + pixels. EXIF orientation is normalized; source container blocks, embedded + thumbnails, trailing bytes, and source profiles are not copied. +4. An independently parsed output is mandatory. The result states what was + removed, preserved, generated, unsupported, or incompletely checked, and + includes source/output SHA-256 hashes and a bounded decoded-pixel sample + comparison. +5. Download an individual re-encoded image, a JSON report, or a ZIP containing + re-encoded images and the report. The report itself may be sensitive because + it contains source filenames and metadata values. + +## Format support + +| Format | Inventory | Deep project scan | Secondary scan | Pixel re-encode | +| ------------------------------------------- | --------- | -------------------------------------------------------------------------------------------------------------------------- | --------------------------------- | ------------------------------------------ | +| Static JPEG | Yes | EXIF/TIFF, IPTC/Photoshop, XMP, JFIF, ICC, COM, MPF, selected JUMBF/C2PA and trailing bytes | ExifReader | JPEG | +| Static PNG | Yes | tEXt, zTXt, iTXt/XMP, eXIf/TIFF, iCCP, pHYs, tIME, private/unknown ancillary chunks, selected caBX/C2PA and trailing bytes | ExifReader | PNG | +| Static WebP | Yes | RIFF/VP8 dimensions, EXIF/TIFF, XMP, ICC, META, animation and trailing bytes | ExifReader | WebP where the browser encoder supports it | +| TIFF, HEIC/HEIF, AVIF, JPEG XL | Yes | No | Best-effort ExifReader inspection | No | +| GIF | Yes | No | No supported deep adapter | No | +| PDF, ZIP/Office, OLE/legacy Office, unknown | Yes | No | No | No | + +Animation, multi-picture JPEG/MPF, and malformed or partially scanned +JPEG/PNG/WebP inputs are inspect-only. Secondary coverage depends on what +ExifReader can establish for the particular container. A browser may decode a +format it cannot encode; that still does not make it eligible for output. + +Findings are grouped as location; people/authorship/rights; dates; device, +serial and lens; software/history; document identifiers; comments/titles/ +keywords; embedded previews; colour profiles; provenance; technical; or +unclassified. Raw XMP is shown only as bounded inert text—never injected as +markup. + +## Security boundaries and limits + +Inputs are untrusted. Container parsing runs in a terminable worker and checks +declared lengths, CRCs, offsets, TIFF cycles/depth/counts, chunk/segment counts, +compressed metadata expansion, dimensions, and aggregate batch size before +continuing. Defaults are 100 files, 128 MiB per file, 512 MiB per batch, 4,096 +metadata blocks/findings, 8 MiB per metadata block, 4 MiB decompressed metadata, +512-character labels, 16,384-character values, 256 KiB normalized finding text +per file, 40 megapixels, a 32,768-pixel edge, and a 256 MiB ZIP payload. + +The pixel decode/encode step uses browser-native image and Canvas APIs. It runs +only after a complete project scan and bounded dimensions. The output gate does +not trust successful encoding: it hashes and scans the newly encoded bytes +again. C2PA/JUMBF provenance is authenticity information rather than ordinary +tracking metadata; pixel re-encoding removes or invalidates it, and the report +calls that out. + +This is not an anonymity tool. Metadata removal does not remove visible faces +or text, steganography, invisible or forensic watermarks, reverse-image +matching, sidecar files, filesystem history, application caches, or cloud and +recipient copies. JPEG and lossy WebP output may alter pixels. Colour profiles, +resolution metadata, and provenance may be lost. Inspect the actual output and +report before sharing it. + +See [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md) and +[docs/PRIVACY-SECURITY.md](docs/PRIVACY-SECURITY.md) for the implementation and +threat model. + +## Browser and accessibility support + +Current evergreen Chromium and Firefox are exercised in the browser gate; +current Safari is an intended target. JavaScript modules, Web Workers, Blob, +Canvas 2D, `createImageBitmap` where available, and Web Crypto are used. WebP +output follows browser encoder support. The application supports the shared +Toolbox system/light/dark themes, keyboard file selection, native table and +disclosure semantics, visible focus, live progress, and non-colour status text. + +## Development + +Requirements: Node.js 22 or newer and npm 11 or newer. + +```sh +npm ci +npm run check +npm run test:browser +npm run dev +``` + +Vite uses `base: './'`, so `dist/` can be hosted at `/` or below a nested +Toolbox path. `toolbox-check` validates the production manifest and bundle. + +## Release + +```sh +npm run release:artifact +``` + +This checks the manifest, types, lint, formatting, unit fixtures, production +build, Toolbox contract, and Chromium/Firefox workflows, then creates the +deterministic `release/privacy-tools-0.1.0.zip` plus its SHA-256 sidecar. The +archive contains the static application, project documents, and exact runtime +dependency licence texts. + +## Licence + +Privacy Tools is free software under `GPL-3.0-or-later`; see [LICENSE](LICENSE). +Runtime dependencies keep their licences, including ExifReader under MPL-2.0. +See [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md). diff --git a/public/SECURITY.md b/public/SECURITY.md new file mode 100644 index 0000000..63624f0 --- /dev/null +++ b/public/SECURITY.md @@ -0,0 +1,33 @@ +# Security + +Report vulnerabilities privately to the repository owner. Do not attach a +sensitive source image, generated report, or real metadata to a public issue; +construct a minimal synthetic reproduction instead. + +## Input model + +Every selected file and every metadata value is untrusted. The application +detects containers from bytes, does not execute imported content, renders text +through React rather than raw HTML, performs no metadata-linked fetches, and +does not preserve source blocks in a re-encoded output. The scanning worker can +be terminated on cancellation. Browser-native pixel decoding remains part of +the browser's trusted computing base. + +Default bounds cover file/batch bytes, container blocks, individual metadata, +decompressed PNG metadata, finding lengths/counts, TIFF offsets/entries/depth, +pixel count/edge, and batch ZIP size. Malformed structures become partial or +failed coverage; they must never receive clean-copy eligibility or a verified +output result. + +## Output model + +A successful Canvas encode is not sufficient. The new bytes are independently +hashed and scanned, expected oriented dimensions are checked, sensitive or +provenance findings fail the verification gate, and incomplete coverage is +reported. C2PA/JUMBF signatures are expected to be removed or invalidated by +pixel re-encoding. Reports and output names are escaped/sanitized and ZIP paths +are application-generated. + +No status is an anonymity guarantee. Visible content, steganography, invisible +watermarks, image fingerprinting, sidecars, local filesystem metadata, browser +history, and remote copies are outside the scan. diff --git a/public/SOURCE.md b/public/SOURCE.md new file mode 100644 index 0000000..618fc8c --- /dev/null +++ b/public/SOURCE.md @@ -0,0 +1,23 @@ +# Corresponding source + +The corresponding source for Privacy Tools 0.1.0 is published at: + +https://git.add-ideas.de/lotobo/privacy-tools/src/tag/v0.1.0 + +Build with Node.js 22 and npm 11: + +```sh +npm ci +npm run release:artifact +``` + +The release command performs all source, test, browser, manifest, and Toolbox +checks before assembling the deterministic static ZIP. The artifact includes +this file, the GPL licence, project documentation, and the runtime dependency +licence texts generated from the exact lockfile. + +ExifReader 4.44.0 is unmodified MPL-2.0 covered software within the bundled +application. Its preferred source form is available from the exact npm package +and upstream release identified in `package-lock.json` and +`THIRD_PARTY_NOTICES.md`; its MPL licence text is included in the generated +runtime licence inventory. diff --git a/public/THIRD_PARTY_NOTICES.md b/public/THIRD_PARTY_NOTICES.md new file mode 100644 index 0000000..ef8a284 --- /dev/null +++ b/public/THIRD_PARTY_NOTICES.md @@ -0,0 +1,23 @@ +# Third-party notices + +Privacy Tools is GPL-3.0-or-later. Dependencies retain their own licences. A +production build generates `LICENSES/npm-runtime-licenses.txt` from the exact +locked runtime packages and copies every available licence/notice text into the +release. + +Material runtime components include: + +| Component | Version | Licence | Purpose/source | +| -------------------------------- | ------- | ---------------- | -------------------------------------------------------------------------------------------------- | +| ExifReader | 4.44.0 | MPL-2.0 | Secondary metadata parser; | +| fflate | 0.8.2 | MIT | Bounded PNG metadata inflation and ZIP creation; | +| `@add-ideas/toolbox-helpers` | 0.1.0 | GPL-3.0-or-later | Hashing, safe names, download and deterministic JSON primitives | +| `@add-ideas/toolbox-contract` | 0.2.3 | Apache-2.0 | Toolbox manifest contract | +| `@add-ideas/toolbox-shell-react` | 0.2.3 | Apache-2.0 | Shared application shell | +| React / React DOM | 19.2.8 | MIT | User interface | + +ExifReader is used unmodified. Its MPL-2.0 covered source remains available at +the exact upstream link above and through the npm package resolved by the +lockfile. The bundled executable does not relicense or restrict the MPL-covered +files. Consult the generated licence inventory for the full MPL-2.0 text and +the exact notices shipped with every runtime package. diff --git a/public/docs/ACCESSIBILITY.md b/public/docs/ACCESSIBILITY.md new file mode 100644 index 0000000..f1afd0e --- /dev/null +++ b/public/docs/ACCESSIBILITY.md @@ -0,0 +1,16 @@ +# Accessibility + +The workbench uses semantic landmarks, headings, a native multiple-file input, +buttons, tables, definition lists, progress, status/alert regions, and native +disclosures/dialogs. All workflows are keyboard operable; drop is an optional +pointer shortcut. Visible focus and the shared Toolbox system/light/dark themes +are preserved. + +Status is always written as text and never encoded by colour alone. Finding +categories expose labels and counts, hashes and media types remain selectable, +and responsive layouts allow horizontal table scrolling without clipping the +whole page. Motion is not required to understand progress or results. + +Automated component and Chromium/Firefox browser gates cover semantics and core +workflows. They supplement, rather than replace, manual keyboard, zoom, +screen-reader, high-contrast, and reduced-motion review before release. diff --git a/public/docs/ARCHITECTURE.md b/public/docs/ARCHITECTURE.md new file mode 100644 index 0000000..8affc35 --- /dev/null +++ b/public/docs/ARCHITECTURE.md @@ -0,0 +1,49 @@ +# Architecture + +Privacy Tools is a relocatable Vite/React static application. The core domain +model in `src/privacy` is serializable: scan inputs cross a worker boundary as +transferred `ArrayBuffer`s and results contain only strings, numbers, booleans, +arrays, and plain objects. No parser returns HTML or a live third-party object. + +## Pipeline + +1. `scan-client` checks file count and declared byte totals before reading the + batch, transfers buffers to a dedicated worker, reports progress, and + terminates the worker on cancellation. +2. `detect` compares magic bytes, filename extension, and browser-claimed MIME. + `scanner` hashes bytes, dispatches the bounded project parser, runs + ExifReader as a distinct secondary adapter, and normalizes findings and + coverage. +3. Project parsers walk JPEG segments, PNG chunks, WebP RIFF chunks, TIFF IFDs, + IPTC datasets, and bounded inert XMP text. They validate offsets, lengths, + counts, PNG CRCs, compression expansion, TIFF cycles/depth, and trailing + bytes. They do not follow URLs or instantiate XML/HTML. +4. `sanitize` runs only for complete, static, bounded JPEG/PNG/WebP scans. A + browser decoder produces pixels, the EXIF display orientation is normalized, + and Canvas creates a fresh same-format file. No input container block is + copied. +5. The encoded bytes are passed back through the same independent scanner API, + hashed, dimension-checked, and compared using a deterministic 256-pixel-edge + decoded sample. `buildSanitizationReport` assigns verified/warning/failed + based on explicit coverage and output findings. +6. `archive` serializes bounded deterministic JSON and creates stored ZIP + entries from application-generated `images/` paths and sanitized unique + names. + +Pixel decoding and Canvas encoding currently run on the main browser context +because portable cross-browser image encoder support is there; metadata parsing +and hashing run in the terminable worker. UI state does not retain data after a +page refresh and no IndexedDB/localStorage persistence is used by this app. + +## Trust boundaries + +- Project parsers and ExifReader independently contribute coverage; one parser's + success does not suppress the other's warning. +- Unknown structures are reported or cause partial coverage. Clean-copy + eligibility requires a complete project container scan. +- Browser image decoders, Canvas encoders, Web Crypto, and the JS runtime are in + the trusted computing base. +- ExifReader is pinned to 4.44.0. Dependency updates require malformed-container + regression fixtures and licence review. +- The Toolbox shell receives the application manifest but never receives file + bytes or findings. diff --git a/public/docs/PRIVACY-SECURITY.md b/public/docs/PRIVACY-SECURITY.md new file mode 100644 index 0000000..8717d5a --- /dev/null +++ b/public/docs/PRIVACY-SECURITY.md @@ -0,0 +1,59 @@ +# Privacy and security + +## Data handling + +Files are read with browser file APIs and transferred to an in-page worker. +There is no upload endpoint, account, telemetry, analytics, remote metadata +lookup, or automatic persistence. Temporary object URLs exist only for the +legacy image-element decode fallback and are revoked immediately after decode. +Download object URLs are created and revoked by the shared helper. Refreshing or +closing the page discards application state. + +Service-worker support may fetch and cache the same-origin application shell; +it does not cache imported files, metadata findings, reports, or generated +images. Metadata URLs and XMP/XML markup are inert text and are never fetched or +rendered as HTML. + +## What is inspected + +Every file receives byte-signature inventory and SHA-256. Static JPEG, PNG, and +WebP receive project-owned deep container parsing plus ExifReader. TIFF, +HEIC/HEIF, AVIF, and JPEG XL receive best-effort ExifReader inspection only. +GIF and document/archive formats receive inventory only. Exact per-format +fields are listed in the README support table. + +All parsers are bounded, but a “complete” scan means complete for implemented +structures—not proof that no steganographic or novel carrier exists. Unknown +private chunks and trailing bytes are surfaced. ExifReader failures and format +limitations remain visible in coverage. + +## Re-encoded outputs + +Only complete, static, dimension-bounded JPEG/PNG/WebP project scans are +eligible. The application decodes pixels, normalizes display orientation, and +uses Canvas to encode a new file of the detected type. It does not selectively +strip GPS while copying everything else, because duplicated values can live in +multiple namespaces and embedded previews. It copies no source metadata block. + +The output is always scanned and hashed again. Sensitive or provenance findings, +partial project coverage, or an oriented-dimension mismatch produce a failed +gate. Secondary-parser limitations and provenance invalidation produce explicit +warnings. JPEG and lossy WebP may change pixels; profiles, resolution metadata, +thumbnails, comments, and application history may be lost. PNG is expected to +preserve decoded pixels, subject to browser colour management. + +C2PA/JUMBF carries authenticity/provenance claims. Re-encoding normally removes +or invalidates those claims. The tool reports that effect rather than describing +it as an ordinary privacy win. + +## What this cannot promise + +No result promises anonymity or safe publication. The tool does not remove or +detect visible faces/text/locations, steganography, invisible watermarks, +camera-pattern or image fingerprints, reverse-image matches, sidecar files, +filesystem metadata, clipboard/history records, application caches, backed-up +originals, or cloud/recipient copies. Review the visible output, destination, +report, and surrounding files yourself. + +The JSON report is sensitive by design: it can include original filenames, +hashes, timestamps, and metadata values. Share or retain it only intentionally. diff --git a/public/favicon.svg b/public/favicon.svg new file mode 100644 index 0000000..4c98aab --- /dev/null +++ b/public/favicon.svg @@ -0,0 +1 @@ +PR diff --git a/public/manifest.webmanifest b/public/manifest.webmanifest new file mode 100644 index 0000000..82fc41c --- /dev/null +++ b/public/manifest.webmanifest @@ -0,0 +1,18 @@ +{ + "name": "Privacy Tools", + "short_name": "Privacy", + "description": "Inspect and remove shareable-file metadata locally in the browser.", + "start_url": "./", + "scope": "./", + "display": "standalone", + "background_color": "#f6f7fb", + "theme_color": "#29255f", + "icons": [ + { + "src": "./favicon.svg", + "sizes": "any", + "type": "image/svg+xml", + "purpose": "any maskable" + } + ] +} diff --git a/public/sw.js b/public/sw.js new file mode 100644 index 0000000..ea09921 --- /dev/null +++ b/public/sw.js @@ -0,0 +1,54 @@ +const CACHE_PREFIX = "privacy-tools-shell-"; +const CACHE_NAME = CACHE_PREFIX + "0.1.0"; +const CORE = ["./", "./manifest.webmanifest", "./favicon.svg"]; +self.addEventListener("install", (event) => { + event.waitUntil( + caches.open(CACHE_NAME).then(async (cache) => { + await cache.addAll(CORE); + const html = await (await fetch("./")).text(); + const assets = [...html.matchAll(/(?:src|href)="(\.\/assets\/[^"]+)"/g)] + .map((match) => match[1]) + .filter(Boolean); + await cache.addAll(assets); + }), + ); + self.skipWaiting(); +}); +self.addEventListener("activate", (event) => { + event.waitUntil( + caches + .keys() + .then((keys) => + Promise.all( + keys + .filter((key) => key.startsWith(CACHE_PREFIX) && key !== CACHE_NAME) + .map((key) => caches.delete(key)), + ), + ) + .then(() => self.clients.claim()), + ); +}); +self.addEventListener("fetch", (event) => { + if (event.request.method !== "GET") return; + const url = new URL(event.request.url); + if ( + url.origin !== self.location.origin || + !url.pathname.startsWith(new URL(self.registration.scope).pathname) + ) + return; + event.respondWith( + caches.match(event.request).then( + (cached) => + cached ?? + fetch(event.request).then((response) => { + if (response.ok) { + const copy = response.clone(); + void caches + .open(CACHE_NAME) + .then((cache) => cache.put(event.request, copy)); + } + return response; + }), + ), + ); +}); diff --git a/public/toolbox-app.json b/public/toolbox-app.json new file mode 100644 index 0000000..4236046 --- /dev/null +++ b/public/toolbox-app.json @@ -0,0 +1,41 @@ +{ + "$schema": "https://git.add-ideas.de/lotobo/toolbox-sdk/raw/branch/main/schemas/toolbox-app.v1.schema.json", + "schemaVersion": 1, + "id": "de.add-ideas.privacy-tools", + "name": "Privacy Tools", + "version": "0.1.0", + "description": "Inspect and remove shareable-file metadata locally in the browser.", + "entry": "./", + "icon": "./favicon.svg", + "categories": ["privacy", "files", "security"], + "tags": ["metadata", "exif", "privacy", "sanitize", "share"], + "integration": { + "contextVersion": 1, + "launchModes": ["navigate", "new-tab"], + "embedding": "unsupported" + }, + "requirements": { + "secureContext": true, + "workers": true, + "indexedDb": false, + "crossOriginIsolated": false, + "topLevelContext": false + }, + "privacy": { + "processing": "local", + "fileUploads": true, + "telemetry": false, + "label": "Inputs stay in this browser; nothing is uploaded." + }, + "source": { + "repository": "https://git.add-ideas.de/lotobo/privacy-tools", + "license": "GPL-3.0-or-later" + }, + "actions": [ + { + "id": "source", + "label": "Source", + "url": "https://git.add-ideas.de/lotobo/privacy-tools" + } + ] +} diff --git a/scripts/generate-toolbox-manifest.mjs b/scripts/generate-toolbox-manifest.mjs new file mode 100644 index 0000000..3861261 --- /dev/null +++ b/scripts/generate-toolbox-manifest.mjs @@ -0,0 +1,33 @@ +import { readFile, writeFile } from "node:fs/promises"; +import path from "node:path"; +import { fileURLToPath } from "node:url"; +import { format } from "prettier"; +const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), ".."); +const sourcePath = path.join(root, "src/toolbox/manifest.source.json"); +const outputPath = path.join(root, "public/toolbox-app.json"); +const source = JSON.parse(await readFile(sourcePath, "utf8")); +const pkg = JSON.parse(await readFile(path.join(root, "package.json"), "utf8")); +const versionSource = await readFile(path.join(root, "src/version.ts"), "utf8"); +const appVersion = /^export const APP_VERSION = "([^"]+)";$/mu.exec( + versionSource, +)?.[1]; +const repository = "https://git.add-ideas.de/lotobo/" + pkg.name; +if (source.version !== pkg.version || appVersion !== pkg.version) + throw new Error("Version identity drift"); +if ( + source.id !== "de.add-ideas." + pkg.name || + source.source?.repository !== repository || + source.source?.license !== "GPL-3.0-or-later" +) + throw new Error("Manifest source identity is invalid"); +const serialized = await format(JSON.stringify(source), { + filepath: outputPath, +}); +if (process.argv.includes("--check")) { + if ((await readFile(outputPath, "utf8").catch(() => "")) !== serialized) + throw new Error("public/toolbox-app.json is stale"); + console.log("Toolbox manifest is synchronized"); +} else { + await writeFile(outputPath, serialized); + console.log("Generated public/toolbox-app.json"); +} diff --git a/scripts/package-release.mjs b/scripts/package-release.mjs new file mode 100644 index 0000000..1629f25 --- /dev/null +++ b/scripts/package-release.mjs @@ -0,0 +1,165 @@ +#!/usr/bin/env node +import { createHash } from "node:crypto"; +import { execFile } from "node:child_process"; +import { + access, + chmod, + copyFile, + cp, + lstat, + mkdir, + mkdtemp, + readFile, + readdir, + rename, + rm, + utimes, + writeFile, +} from "node:fs/promises"; +import os from "node:os"; +import path from "node:path"; +import { promisify } from "node:util"; +import { fileURLToPath } from "node:url"; +const execute = promisify(execFile); +const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), ".."); +const pkg = JSON.parse(await readFile(path.join(root, "package.json"), "utf8")); +const argument = (name, fallback) => { + const index = process.argv.indexOf(name); + return index >= 0 ? process.argv[index + 1] : fallback; +}; +const output = path.resolve( + root, + argument("--output", "release/" + pkg.name + "-" + pkg.version + ".zip"), +); +const checksumOutput = output + ".sha256"; +const force = process.argv.includes("--force"); +if ( + path.extname(output).toLowerCase() !== ".zip" || + output === root || + output === path.parse(output).root +) + throw new Error("Unsafe release target"); +const exists = (file) => + access(file).then( + () => true, + () => false, + ); +if (!force && ((await exists(output)) || (await exists(checksumOutput)))) + throw new Error("Release output exists"); +const input = path.join(root, "dist"); +for (const name of [ + "index.html", + "manifest.webmanifest", + "sw.js", + "toolbox-app.json", + "favicon.svg", + "README.md", + "CHANGELOG.md", + "CONTRIBUTING.md", + "LICENSE", + "SECURITY.md", + "SOURCE.md", + "THIRD_PARTY_NOTICES.md", + "LICENSES/README.md", + "LICENSES/npm-runtime-licenses.txt", + "docs/ACCESSIBILITY.md", + "docs/ARCHITECTURE.md", + "docs/PRIVACY-SECURITY.md", +]) { + const details = await lstat(path.join(input, name)).catch(() => null); + if (!details?.isFile() || details.isSymbolicLink()) + throw new Error("Missing release file: " + name); +} +const manifest = JSON.parse( + await readFile(path.join(input, "toolbox-app.json"), "utf8"), +); +const repository = "https://git.add-ideas.de/lotobo/" + pkg.name; +if ( + manifest.id !== "de.add-ideas." + pkg.name || + manifest.version !== pkg.version || + manifest.entry !== "./" || + manifest.icon !== "./favicon.svg" || + manifest.source?.repository !== repository +) + throw new Error("Packaged manifest identity is invalid"); +if ( + /\b(?:src|href)=["']\//iu.test( + await readFile(path.join(input, "index.html"), "utf8"), + ) +) + throw new Error("Root-absolute asset reference"); +async function collect(directory, prefix = "") { + const files = []; + for (const entry of (await readdir(directory, { withFileTypes: true })).sort( + (a, b) => a.name.localeCompare(b.name), + )) { + const absolute = path.join(directory, entry.name); + const relative = prefix ? prefix + "/" + entry.name : entry.name; + if (entry.isSymbolicLink()) + throw new Error("Symlink in release: " + relative); + if (entry.isDirectory()) files.push(...(await collect(absolute, relative))); + else if (entry.isFile()) files.push({ absolute, relative }); + else throw new Error("Unsupported release entry: " + relative); + } + return files; +} +const sourceFiles = await collect(input); +for (const file of sourceFiles) + if ( + file.relative.endsWith(".map") || + /(?:^|\/)(?:\.env(?:\.|$)|id_rsa|id_ed25519|.*\.pem$|.*\.key$)/iu.test( + file.relative, + ) || + file.relative.split("/").includes("..") + ) + throw new Error("Forbidden release entry: " + file.relative); +await mkdir(path.dirname(output), { recursive: true }); +const stagingRoot = await mkdtemp( + path.join(os.tmpdir(), pkg.name + "-release-"), +); +const publicationRoot = await mkdtemp( + path.join(path.dirname(output), "." + pkg.name + "-publish-"), +); +const stagedTree = path.join(stagingRoot, "tree"); +const stagedArchive = path.join(stagingRoot, path.basename(output)); +try { + await cp(input, stagedTree, { recursive: true }); + const timestamp = new Date("1980-01-01T00:00:00.000Z"); + for (const file of await collect(stagedTree)) { + await chmod(file.absolute, 0o644); + await utimes(file.absolute, timestamp, timestamp); + } + await execute( + "zip", + [ + "-X", + "-q", + "-9", + stagedArchive, + ...sourceFiles.map((file) => file.relative), + ], + { + cwd: stagedTree, + env: { ...process.env, TZ: "UTC" }, + maxBuffer: 1024 * 1024, + }, + ); + const archive = await readFile(stagedArchive); + const digest = createHash("sha256").update(archive).digest("hex"); + const stagedChecksum = stagedArchive + ".sha256"; + await writeFile(stagedChecksum, digest + " " + path.basename(output) + "\n"); + const publicationArchive = path.join(publicationRoot, path.basename(output)); + const publicationChecksum = publicationArchive + ".sha256"; + await copyFile(stagedArchive, publicationArchive); + await copyFile(stagedChecksum, publicationChecksum); + if (force) { + await rm(output, { force: true }); + await rm(checksumOutput, { force: true }); + } + await rename(publicationArchive, output); + await rename(publicationChecksum, checksumOutput); + console.log("Created " + path.relative(root, output) + "\nSHA-256 " + digest); +} finally { + await rm(stagingRoot, { recursive: true, force: true }); + await rm(publicationRoot, { recursive: true, force: true }); +} diff --git a/scripts/prepare-release-files.mjs b/scripts/prepare-release-files.mjs new file mode 100644 index 0000000..e5d09e9 --- /dev/null +++ b/scripts/prepare-release-files.mjs @@ -0,0 +1,70 @@ +import { cp, mkdir, readFile, readdir, rm, writeFile } from "node:fs/promises"; +import path from "node:path"; +import { fileURLToPath } from "node:url"; +const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), ".."); +const destination = path.join(root, "public"); +for (const name of [ + "LICENSE", + "README.md", + "CHANGELOG.md", + "CONTRIBUTING.md", + "SECURITY.md", + "SOURCE.md", + "THIRD_PARTY_NOTICES.md", +]) { + await readFile(path.join(root, name)); + await cp(path.join(root, name), path.join(destination, name)); +} +for (const directory of ["LICENSES", "docs"]) { + const output = path.join(destination, directory); + await rm(output, { recursive: true, force: true }); + await cp(path.join(root, directory), output, { recursive: true }); +} +const lock = JSON.parse( + await readFile(path.join(root, "package-lock.json"), "utf8"), +); +const sections = []; +for (const [location, locked] of Object.entries(lock.packages ?? {}).sort( + ([a], [b]) => a.localeCompare(b), +)) { + if (!location.includes("node_modules/") || locked.dev === true) continue; + const packageDirectory = path.join(root, location); + const details = JSON.parse( + await readFile(path.join(packageDirectory, "package.json"), "utf8"), + ); + const candidates = (await readdir(packageDirectory)) + .filter((name) => /^(?:licen[cs]e|copying|notice)(?:\.|$)/iu.test(name)) + .sort(); + const texts = []; + for (const candidate of candidates) { + try { + texts.push( + "--- " + + candidate + + " ---\n" + + (await readFile(path.join(packageDirectory, candidate), "utf8")), + ); + } catch { + /* directory */ + } + } + sections.push( + "=".repeat(78) + + "\n" + + details.name + + "@" + + details.version + + "\nDeclared licence: " + + (details.license ?? locked.license ?? "See upstream") + + "\n" + + "=".repeat(78) + + "\n" + + (texts.join("\n\n") || "See upstream package metadata."), + ); +} +await mkdir(path.join(destination, "LICENSES"), { recursive: true }); +await writeFile( + path.join(destination, "LICENSES/npm-runtime-licenses.txt"), + sections.join("\n\n").trimEnd() + "\n", +); +console.log("Prepared release documentation"); diff --git a/scripts/serve-test.mjs b/scripts/serve-test.mjs new file mode 100644 index 0000000..f131fb0 --- /dev/null +++ b/scripts/serve-test.mjs @@ -0,0 +1,66 @@ +import { createServer } from "node:http"; +import { readFile, stat } from "node:fs/promises"; +import path from "node:path"; +import { fileURLToPath } from "node:url"; +const root = path.resolve( + path.dirname(fileURLToPath(import.meta.url)), + "..", + "dist", +); +const prefix = "/deep/nested/privacy/"; +const types = new Map([ + [".css", "text/css; charset=utf-8"], + [".html", "text/html; charset=utf-8"], + [".js", "text/javascript; charset=utf-8"], + [".json", "application/json; charset=utf-8"], + [".webmanifest", "application/manifest+json; charset=utf-8"], + [".svg", "image/svg+xml"], + [".md", "text/markdown; charset=utf-8"], + [".txt", "text/plain; charset=utf-8"], + [".wasm", "application/wasm"], + [".png", "image/png"], + [".jpg", "image/jpeg"], + [".webp", "image/webp"], +]); +const headers = { + "Content-Security-Policy": + "default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self' 'wasm-unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; media-src 'self' blob:; connect-src 'self'; worker-src 'self' blob:; manifest-src 'self'", + "Cross-Origin-Opener-Policy": "same-origin", + "Cross-Origin-Resource-Policy": "same-origin", + "Permissions-Policy": + "camera=(), microphone=(), geolocation=(), usb=(), payment=()", + "Referrer-Policy": "no-referrer", + "X-Content-Type-Options": "nosniff", +}; +const server = createServer(async (request, response) => { + try { + const url = new URL(request.url ?? "/", "http://127.0.0.1"); + const relative = decodeURIComponent(url.pathname).startsWith(prefix) + ? decodeURIComponent(url.pathname).slice(prefix.length) + : decodeURIComponent(url.pathname).replace(/^\/+/, ""); + const normalized = path.posix.normalize(relative || "index.html"); + if ( + normalized === ".." || + normalized.startsWith("../") || + path.isAbsolute(normalized) + ) { + response.writeHead(400).end("Bad request"); + return; + } + let file = path.join(root, normalized); + if ((await stat(file).catch(() => null))?.isDirectory()) + file = path.join(file, "index.html"); + const content = await readFile(file); + response.writeHead(200, { + "Content-Type": + types.get(path.extname(file)) ?? "application/octet-stream", + "Cache-Control": "no-cache", + ...headers, + }); + response.end(content); + } catch { + response.writeHead(404, { "Content-Type": "text/plain; charset=utf-8" }); + response.end("Not found"); + } +}); +server.listen(4173, "127.0.0.1", () => console.log("Test server ready")); diff --git a/src/App.tsx b/src/App.tsx new file mode 100644 index 0000000..7d842ea --- /dev/null +++ b/src/App.tsx @@ -0,0 +1,35 @@ +import { lazy, Suspense, useState } from "react"; +import { AppShell } from "@add-ideas/toolbox-shell-react"; +import "@add-ideas/toolbox-shell-react/styles.css"; +import "./styles.css"; +import { ErrorBoundary } from "./components/ErrorBoundary"; +import { HelpDialog } from "./components/HelpDialog"; +import { manifest } from "./toolbox/manifest"; + +const Workbench = lazy(async () => ({ + default: (await import("./components/Workbench")).Workbench, +})); + +export function App() { + const [helpOpen, setHelpOpen] = useState(false); + return ( + + setHelpOpen(true) }} + > + + Preparing Privacy Tools… +

+ } + > + + + + setHelpOpen(false)} /> + + ); +} diff --git a/src/components/ErrorBoundary.tsx b/src/components/ErrorBoundary.tsx new file mode 100644 index 0000000..8f8623a --- /dev/null +++ b/src/components/ErrorBoundary.tsx @@ -0,0 +1,27 @@ +import { Component, type ErrorInfo, type ReactNode } from "react"; + +export class ErrorBoundary extends Component< + { children: ReactNode }, + { error?: Error } +> { + state: { error?: Error } = {}; + static getDerivedStateFromError(error: Error) { + return { error }; + } + componentDidCatch(error: Error, info: ErrorInfo) { + console.error("Application failure", error, info); + } + render() { + if (this.state.error) + return ( +
+

Privacy Tools could not continue

+

{this.state.error.message}

+ +
+ ); + return this.props.children; + } +} diff --git a/src/components/HelpDialog.tsx b/src/components/HelpDialog.tsx new file mode 100644 index 0000000..056730a --- /dev/null +++ b/src/components/HelpDialog.tsx @@ -0,0 +1,77 @@ +import { useEffect, useRef } from "react"; + +export function HelpDialog({ + open, + onClose, +}: { + open: boolean; + onClose(): void; +}) { + const dialog = useRef(null); + useEffect(() => { + const node = dialog.current; + if (!node) return; + if (open && !node.open) node.showModal(); + if (!open && node.open) node.close(); + }, [open]); + return ( + { + event.preventDefault(); + onClose(); + }} + aria-labelledby="help-title" + > +
+
+

Local-first help

+

About Privacy Tools

+
+ +
+
+
+

What inspection covers

+

+ All files receive magic-byte inventory. JPEG, PNG and WebP receive + bounded container scans for EXIF, IPTC, XMP, text, profiles, + thumbnails and selected provenance blocks. A separate ExifReader + pass expands coverage and inspects TIFF, HEIC, AVIF and JXL on a + best-effort basis. GIF and document formats receive inventory only. +

+
+
+

What a clean copy means

+

+ Supported static images are decoded to pixels, displayed orientation + is normalized, and a new JPEG, PNG or WebP is encoded. No source + metadata block is copied. The output must pass both scanners before + it can receive a verified result. +

+
+
+

Important limits

+

+ Animation and multi-image files are inspect-only. Re-encoding may + change JPEG/WebP pixels, colour profiles, resolution metadata and + file size. C2PA/JUMBF provenance is removed or invalidated and is + never silently described as preserved. +

+
+
+

No anonymity promise

+

+ Visible content, steganography, invisible watermarks, reverse-image + matching, sidecars, filesystem history and remote copies remain + outside this tool. Review the actual image before sharing it. +

+
+
+ + ); +} diff --git a/src/components/Workbench.tsx b/src/components/Workbench.tsx new file mode 100644 index 0000000..6677894 --- /dev/null +++ b/src/components/Workbench.tsx @@ -0,0 +1,687 @@ +import { useEffect, useMemo, useRef, useState } from "react"; +import { triggerBlobDownload } from "@add-ideas/toolbox-helpers"; + +import { + createBatchArchive, + createBatchReport, + sanitizeStaticImage, + scanFilesInWorker, + serializeReport, + type FindingCategory, + type ImageScanResult, + type SanitizedAsset, +} from "../privacy"; + +interface FileRecord { + file: File; + scan: ImageScanResult; + asset?: SanitizedAsset; + sanitizing?: boolean; + error?: string; +} + +interface Progress { + completed: number; + total: number; + currentName: string; +} + +const CATEGORY_LABELS: Readonly> = + Object.freeze({ + location: "Location", + identity: "People, authorship & rights", + timestamp: "Dates & times", + device: "Device, serial & lens", + software: "Software & history", + "document-id": "Document identifiers", + comment: "Comments, titles & keywords", + thumbnail: "Embedded previews & extra images", + "colour-profile": "Colour profiles", + provenance: "Provenance & signatures", + technical: "Technical metadata", + unknown: "Unclassified metadata", + }); + +export function Workbench() { + const [records, setRecords] = useState([]); + const [busy, setBusy] = useState<"scan" | "sanitize" | "archive" | null>( + null, + ); + const [progress, setProgress] = useState(null); + const [error, setError] = useState(""); + const [dragging, setDragging] = useState(false); + const abortRef = useRef(null); + const inputRef = useRef(null); + const cleanable = useMemo( + () => records.filter((record) => record.scan.cleanable), + [records], + ); + const assets = useMemo( + () => records.flatMap((record) => (record.asset ? [record.asset] : [])), + [records], + ); + + useEffect( + () => () => { + abortRef.current?.abort(); + }, + [], + ); + + const importFiles = async (selection: FileList | readonly File[]) => { + const files = Array.from(selection); + if (files.length === 0) return; + abortRef.current?.abort(); + const controller = new AbortController(); + abortRef.current = controller; + setBusy("scan"); + setProgress({ + completed: 0, + total: files.length, + currentName: files[0]?.name ?? "", + }); + setError(""); + setRecords([]); + try { + const scans = await scanFilesInWorker( + files, + setProgress, + controller.signal, + ); + if (controller.signal.aborted) return; + setRecords(scans.map((scan, index) => ({ file: files[index]!, scan }))); + } catch (caught) { + if (!isAbort(caught)) setError(errorMessage(caught)); + } finally { + if (abortRef.current === controller) { + abortRef.current = null; + setBusy(null); + setProgress(null); + } + if (inputRef.current) inputRef.current.value = ""; + } + }; + + const sanitizeOne = async (id: string) => { + const record = records.find((item) => item.scan.id === id); + if (!record?.scan.cleanable) return; + const controller = new AbortController(); + abortRef.current = controller; + setBusy("sanitize"); + setError(""); + setRecords((current) => + current.map((item) => + item.scan.id === id + ? { ...item, sanitizing: true, error: undefined } + : item, + ), + ); + try { + const asset = await sanitizeStaticImage(record.file, record.scan, { + signal: controller.signal, + }); + setRecords((current) => + current.map((item) => + item.scan.id === id + ? { ...item, asset, sanitizing: false, error: undefined } + : item, + ), + ); + } catch (caught) { + if (!isAbort(caught)) + setRecords((current) => + current.map((item) => + item.scan.id === id + ? { + ...item, + sanitizing: false, + error: errorMessage(caught), + } + : item, + ), + ); + } finally { + if (abortRef.current === controller) abortRef.current = null; + setBusy(null); + } + }; + + const sanitizeAll = async () => { + const pending = records.filter( + (record) => record.scan.cleanable && !record.asset, + ); + if (pending.length === 0) return; + const controller = new AbortController(); + abortRef.current = controller; + setBusy("sanitize"); + setError(""); + for (let index = 0; index < pending.length; index += 1) { + const record = pending[index]; + if (!record || controller.signal.aborted) break; + setProgress({ + completed: index, + total: pending.length, + currentName: record.file.name, + }); + setRecords((current) => + current.map((item) => + item.scan.id === record.scan.id + ? { ...item, sanitizing: true, error: undefined } + : item, + ), + ); + try { + const asset = await sanitizeStaticImage(record.file, record.scan, { + signal: controller.signal, + }); + setRecords((current) => + current.map((item) => + item.scan.id === record.scan.id + ? { ...item, asset, sanitizing: false } + : item, + ), + ); + } catch (caught) { + if (isAbort(caught)) break; + setRecords((current) => + current.map((item) => + item.scan.id === record.scan.id + ? { + ...item, + sanitizing: false, + error: errorMessage(caught), + } + : item, + ), + ); + } + } + if (abortRef.current === controller) abortRef.current = null; + setRecords((current) => + current.map((record) => + record.sanitizing ? { ...record, sanitizing: false } : record, + ), + ); + setProgress(null); + setBusy(null); + }; + + const downloadReport = () => { + setError(""); + try { + const report = createBatchReport( + records.map((record) => record.scan), + assets, + ); + triggerBlobDownload( + new Blob([serializeReport(report)], { type: "application/json" }), + "privacy-tools-report.json", + ); + } catch (caught) { + setError(errorMessage(caught)); + } + }; + + const downloadArchive = async () => { + if (assets.length === 0) return; + setBusy("archive"); + setError(""); + try { + const blob = await createBatchArchive( + records.map((record) => record.scan), + assets, + ); + triggerBlobDownload(blob, "privacy-tools-re-encoded-images.zip"); + } catch (caught) { + setError(errorMessage(caught)); + } finally { + setBusy(null); + } + }; + + const clear = () => { + abortRef.current?.abort(); + abortRef.current = null; + setRecords([]); + setBusy(null); + setProgress(null); + setError(""); + }; + + return ( +
+
+
+

Image metadata workbench

+

Privacy Tools

+

+ Inventory files, inspect static-image metadata, then create and + independently re-scan pixel-only sharing copies—all in this browser. +

+
+ Local & ephemeral +
+ +
+
+
+

Step 1

+

Choose files to inspect

+
+ + 100 files · 128 MiB each · 512 MiB batch + +
+ + { + if (event.currentTarget.files) + void importFiles(event.currentTarget.files); + }} + /> + {busy && progress ? ( +
+ + + {busy === "scan" ? "Inspecting" : "Re-encoding"}{" "} + {progress.currentName} · {progress.completed} of {progress.total} + +
+ ) : null} + {error ? ( +

+ {error} +

+ ) : null} +
+ + {records.length > 0 ? ( + <> +
+
+
+

Step 2

+

Batch inventory

+

+ Detection uses file bytes, not just the extension or browser + claim. +

+
+
+ + {busy === "scan" || busy === "sanitize" ? ( + + ) : null} + +
+
+
+ + + + + + + + + + + + {records.map((record) => ( + + + + + + + + ))} + +
FileClaimedDetectedFindingsClean copy
+ {record.scan.name} + + {formatBytes(record.scan.size)} ·{" "} + {record.scan.sha256.slice(0, 12)}… + + + + {record.scan.identity.claimedType || "not claimed"} + + .{record.scan.identity.extension || "none"} + + {record.scan.identity.detectedType} + + + {record.scan.findings.length} + + {record.scan.coverage.projectScanner} project scan + + + {record.asset ? ( + + ) : record.scan.cleanable ? ( + + ) : ( + Inspect only + )} +
+
+
+ +
+ {records.map((record) => ( + void sanitizeOne(record.scan.id)} + /> + ))} +
+ +
+
+
+

Step 3

+

Export deliberately

+

+ The JSON report includes original filenames and detected + values and may itself be sensitive. +

+
+
+ + +
+
+
+ + ) : null} + + +
+ ); +} + +function FileResult({ + record, + busy, + onSanitize, +}: { + record: FileRecord; + busy: boolean; + onSanitize(): void; +}) { + const grouped = groupFindings(record.scan); + return ( +
+
+
+

+ {record.scan.identity.detectedKind.toUpperCase()} +

+

{record.scan.name}

+

+ {record.scan.width && record.scan.height + ? `${record.scan.width} × ${record.scan.height} pixels · ` + : ""} + SHA-256 {record.scan.sha256} +

+
+
+ {record.scan.cleanable && !record.asset ? ( + + ) : null} + {record.asset ? ( + + ) : null} +
+
+ {record.error ? ( +

+ {record.error} +

+ ) : null} + {record.scan.warnings.length > 0 ? ( +
    + {record.scan.warnings.map((warning) => ( +
  • {warning}
    • + ))} +
+ ) : null} +
+ {grouped.length === 0 ? ( +

+ No recognized metadata findings were reported within scanner + coverage. +

+ ) : ( + grouped.map(([category, findings]) => ( +
finding.risk === "sensitive")} + > + + {CATEGORY_LABELS[category]} + {findings.length} + +
+ {findings.slice(0, 50).map((finding) => ( +
+
+ {finding.label} + {finding.source} +
+ {finding.value || "(empty)"} +
+ ))} + {findings.length > 50 ? ( +

+ {findings.length - 50} more findings are included in the + JSON report. +

+ ) : null} +
+
+ )) + )} +
+ {record.asset ? : null} +
+ ); +} + +function Verification({ report }: { report: SanitizedAsset["report"] }) { + return ( +
+
+
+

Mandatory output re-scan

+

{report.summary}

+
+ +
+
+
+
Output hash
+
+ {report.outputSha256} +
+
+
+
Metadata
+
+ {report.removed.length} removed · {report.preserved.length}{" "} + preserved · {report.generated.length} generated +
+
+
+
Orientation
+
+ {report.orientationNormalized ? "Normalized" : "Review required"} +
+
+
+
Pixel sample
+
+ {report.pixelComparison.identical + ? "Identical" + : "Changed after encoding"} +
+
+
+ {report.generated.length > 0 ? ( +
+ Generated or preserved output metadata +
    + {report.generated.map((finding) => ( +
  • + {finding.label}: {finding.value} +
    • + ))} +
+
+ ) : null} + {[...report.unsupported, ...report.incomplete].length > 0 ? ( +
    + {[...report.unsupported, ...report.incomplete].map((note) => ( +
  • {note}
    • + ))} +
+ ) : null} +

{report.disclaimer}

+
+ ); +} + +function StatusBadge({ status }: { status: string }) { + const normalized = status.replace(/[^a-z]+/gu, "-"); + return {status}; +} + +function groupFindings( + scan: ImageScanResult, +): Array<[FindingCategory, ImageScanResult["findings"]]> { + const groups = new Map(); + for (const finding of scan.findings) { + const values = groups.get(finding.category) ?? []; + values.push(finding); + groups.set(finding.category, values); + } + return [...groups.entries()]; +} + +function formatBytes(value: number): string { + if (value < 1024) return `${value} B`; + if (value < 1024 ** 2) return `${(value / 1024).toFixed(1)} KiB`; + return `${(value / 1024 ** 2).toFixed(1)} MiB`; +} + +function errorMessage(error: unknown): string { + return error instanceof Error ? error.message : "The operation failed."; +} + +function isAbort(error: unknown): boolean { + return error instanceof DOMException && error.name === "AbortError"; +} diff --git a/src/main.tsx b/src/main.tsx new file mode 100644 index 0000000..a1e243e --- /dev/null +++ b/src/main.tsx @@ -0,0 +1,18 @@ +import { StrictMode } from "react"; +import { createRoot } from "react-dom/client"; +import { App } from "./App"; + +createRoot(document.getElementById("root")!).render( + + + , +); + +if ("serviceWorker" in navigator && import.meta.env.PROD) { + window.addEventListener("load", () => { + const url = new URL("./sw.js", document.baseURI); + void navigator.serviceWorker + .register(url, { scope: new URL("./", document.baseURI).pathname }) + .catch(() => undefined); + }); +} diff --git a/src/privacy/archive.ts b/src/privacy/archive.ts new file mode 100644 index 0000000..090e974 --- /dev/null +++ b/src/privacy/archive.ts @@ -0,0 +1,121 @@ +import { + encodeText, + sanitizeDownloadFilename, + stableStringify, +} from "@add-ideas/toolbox-helpers"; +import { zipSync } from "fflate"; + +import { APP_VERSION } from "../version"; +import { + assertLimit, + DEFAULT_PRIVACY_LIMITS, + PrivacyLimitError, +} from "./limits"; +import type { + BatchReport, + ImageScanResult, + SanitizedAsset, + SanitizationReport, +} from "./model"; + +export function createBatchReport( + files: readonly ImageScanResult[], + assets: readonly SanitizedAsset[], + generatedAt = new Date().toISOString(), +): BatchReport { + return { + schemaVersion: 1, + generatedAt, + application: { name: "Privacy Tools", version: APP_VERSION }, + files: [...files], + sanitizations: assets.map((asset) => asset.report), + warnings: [ + "This report may itself contain sensitive source metadata and filenames; store and share it deliberately.", + "A successful re-scan is not an anonymity guarantee; see each sanitization disclaimer.", + ], + }; +} + +export function serializeReport( + report: BatchReport | SanitizationReport, +): string { + return stableStringify(report, 2, { + maxDepth: 64, + maxNodes: 500_000, + maxTextChars: 2_000_000, + }); +} + +export async function createBatchArchive( + files: readonly ImageScanResult[], + assets: readonly SanitizedAsset[], + generatedAt = new Date().toISOString(), +): Promise { + assertLimit( + files.length, + DEFAULT_PRIVACY_LIMITS.maxFiles, + "Report file count", + ); + assertLimit( + assets.length, + DEFAULT_PRIVACY_LIMITS.maxFiles, + "Archive image count", + ); + const entries: Record = Object.create(null) as Record< + string, + Uint8Array + >; + const names = new Set(); + let total = 0; + for (const asset of assets) { + const name = uniqueName(asset.report.outputName, names); + const bytes = new Uint8Array(await asset.blob.arrayBuffer()); + total += bytes.byteLength; + if (total > DEFAULT_PRIVACY_LIMITS.maxZipBytes) + throw new PrivacyLimitError( + "Batch archive input size", + total, + DEFAULT_PRIVACY_LIMITS.maxZipBytes, + ); + entries[`images/${name}`] = bytes; + } + const report = encodeText( + serializeReport(createBatchReport(files, assets, generatedAt)), + ); + total += report.byteLength; + if (total > DEFAULT_PRIVACY_LIMITS.maxZipBytes) + throw new PrivacyLimitError( + "Batch archive input size", + total, + DEFAULT_PRIVACY_LIMITS.maxZipBytes, + ); + entries["privacy-tools-report.json"] = report; + const archive = zipSync(entries, { + level: 0, + mtime: new Date("1980-01-01T00:00:00.000Z"), + }); + if (archive.byteLength > DEFAULT_PRIVACY_LIMITS.maxZipBytes) + throw new PrivacyLimitError( + "Batch archive output size", + archive.byteLength, + DEFAULT_PRIVACY_LIMITS.maxZipBytes, + ); + const ownedArchive = archive.slice().buffer as ArrayBuffer; + return new Blob([ownedArchive], { type: "application/zip" }); +} + +function uniqueName(input: string, used: Set): string { + const safe = sanitizeDownloadFilename(input, "image.clean"); + if (!used.has(safe)) { + used.add(safe); + return safe; + } + const dot = safe.lastIndexOf("."); + const stem = dot > 0 ? safe.slice(0, dot) : safe; + const extension = dot > 0 ? safe.slice(dot) : ""; + let counter = 2; + while (used.has(`${stem}-${counter}${extension}`)) counter += 1; + const candidate = `${stem}-${counter}${extension}`; + used.add(candidate); + return candidate; +} diff --git a/src/privacy/detect.ts b/src/privacy/detect.ts new file mode 100644 index 0000000..c3c5c40 --- /dev/null +++ b/src/privacy/detect.ts @@ -0,0 +1,149 @@ +import type { DetectedKind, InventoryIdentity } from "./model"; + +const MIME_BY_KIND: Readonly> = Object.freeze({ + jpeg: "image/jpeg", + png: "image/png", + webp: "image/webp", + gif: "image/gif", + tiff: "image/tiff", + heic: "image/heic", + avif: "image/avif", + jxl: "image/jxl", + pdf: "application/pdf", + zip: "application/zip", + ole: "application/x-ole-storage", + unknown: "application/octet-stream", +}); + +const EXTENSIONS: Readonly> = Object.freeze({ + jpg: "jpeg", + jpeg: "jpeg", + jpe: "jpeg", + png: "png", + webp: "webp", + gif: "gif", + tif: "tiff", + tiff: "tiff", + heic: "heic", + heif: "heic", + avif: "avif", + jxl: "jxl", + pdf: "pdf", + zip: "zip", + docx: "zip", + xlsx: "zip", + pptx: "zip", + odt: "zip", + ods: "zip", + odp: "zip", + doc: "ole", + xls: "ole", + ppt: "ole", +}); + +export function fileExtension(name: string): string { + const leaf = name.replace(/\\/gu, "/").split("/").at(-1) ?? ""; + const index = leaf.lastIndexOf("."); + return index > 0 && index < leaf.length - 1 + ? leaf.slice(index + 1).toLowerCase() + : ""; +} + +export function detectKind(bytes: Uint8Array): DetectedKind { + if (starts(bytes, [0xff, 0xd8, 0xff])) return "jpeg"; + if (starts(bytes, [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])) + return "png"; + if (ascii(bytes, 0, 4) === "RIFF" && ascii(bytes, 8, 4) === "WEBP") + return "webp"; + if (ascii(bytes, 0, 6) === "GIF87a" || ascii(bytes, 0, 6) === "GIF89a") + return "gif"; + if ( + starts(bytes, [0x49, 0x49, 0x2a, 0x00]) || + starts(bytes, [0x4d, 0x4d, 0x00, 0x2a]) + ) + return "tiff"; + if (starts(bytes, [0x25, 0x50, 0x44, 0x46, 0x2d])) return "pdf"; + if ( + starts(bytes, [0x50, 0x4b, 0x03, 0x04]) || + starts(bytes, [0x50, 0x4b, 0x05, 0x06]) || + starts(bytes, [0x50, 0x4b, 0x07, 0x08]) + ) + return "zip"; + if (starts(bytes, [0xd0, 0xcf, 0x11, 0xe0, 0xa1, 0xb1, 0x1a, 0xe1])) + return "ole"; + if (starts(bytes, [0xff, 0x0a])) return "jxl"; + if ( + starts( + bytes, + [0x00, 0x00, 0x00, 0x0c, 0x4a, 0x58, 0x4c, 0x20, 0x0d, 0x0a, 0x87, 0x0a], + ) + ) + return "jxl"; + const brand = isoBmffBrand(bytes); + if (["avif", "avis"].includes(brand)) return "avif"; + if (["heic", "heix", "hevc", "hevx", "mif1", "msf1"].includes(brand)) + return "heic"; + return "unknown"; +} + +export function inventoryIdentity( + name: string, + claimedType: string, + bytes: Uint8Array, +): InventoryIdentity { + const extension = fileExtension(name); + const detectedKind = detectKind(bytes); + const detectedType = MIME_BY_KIND[detectedKind]; + const normalizedClaim = claimedType.trim().toLowerCase(); + const extensionKind = EXTENSIONS[extension]; + const claimedMatches = + !normalizedClaim || normalizedClaim === "application/octet-stream" + ? undefined + : normalizeMime(normalizedClaim) === detectedType; + const extensionMatches = !extensionKind || extensionKind === detectedKind; + const typeMatch = + detectedKind === "unknown" + ? "unknown" + : claimedMatches === false || !extensionMatches + ? "mismatch" + : claimedMatches === undefined && !extensionKind + ? "unclaimed" + : "match"; + return { + claimedType: normalizedClaim, + extension, + detectedKind, + detectedType, + typeMatch, + }; +} + +function normalizeMime(value: string): string { + if (value === "image/jpg" || value === "image/pjpeg") return "image/jpeg"; + if (value === "image/x-png") return "image/png"; + if (value === "image/heif") return "image/heic"; + return value; +} + +function starts(bytes: Uint8Array, signature: readonly number[]): boolean { + return signature.every((value, index) => bytes[index] === value); +} + +function ascii(bytes: Uint8Array, offset: number, length: number): string { + if (offset < 0 || length < 0 || offset + length > bytes.byteLength) return ""; + let result = ""; + for (let index = 0; index < length; index += 1) + result += String.fromCharCode(bytes[offset + index] ?? 0); + return result; +} + +function isoBmffBrand(bytes: Uint8Array): string { + if (bytes.byteLength < 12 || ascii(bytes, 4, 4) !== "ftyp") return ""; + const length = + ((bytes[0] ?? 0) << 24) | + ((bytes[1] ?? 0) << 16) | + ((bytes[2] ?? 0) << 8) | + (bytes[3] ?? 0); + if (length < 12 || length > bytes.byteLength) return ""; + return ascii(bytes, 8, 4).toLowerCase(); +} diff --git a/src/privacy/exif-reader-adapter.ts b/src/privacy/exif-reader-adapter.ts new file mode 100644 index 0000000..6279ce3 --- /dev/null +++ b/src/privacy/exif-reader-adapter.ts @@ -0,0 +1,141 @@ +import ExifReader, { type ExpandedTags } from "exifreader"; + +import { categoryForName, FindingCollector } from "./findings"; +import type { PrivacyLimits } from "./model"; +import { scanXmp } from "./xmp"; + +export interface SecondaryScan { + status: "complete" | "partial" | "unsupported" | "failed"; + width?: number; + height?: number; + notes: string[]; +} + +const GROUP_LABELS: Readonly> = Object.freeze({ + exif: "ExifReader EXIF", + iptc: "ExifReader IPTC", + icc: "ExifReader ICC", + jfif: "ExifReader JFIF", + png: "ExifReader PNG", + pngText: "ExifReader PNG text", + riff: "ExifReader WebP", + gps: "ExifReader GPS", + photoshop: "ExifReader Photoshop", + makerNotes: "ExifReader maker notes", + composite: "ExifReader computed", +}); + +export function scanWithExifReader( + bytes: ArrayBuffer, + collector: FindingCollector, + limits: Readonly, +): SecondaryScan { + try { + const tags = ExifReader.load(bytes, { + expanded: true, + async: false, + computed: true, + includeUnknown: false, + excludeTags: { xmp: true, mpf: true }, + decompress: { maxDecompressedSize: limits.maxInflatedMetadataBytes }, + }); + const fileType = tags.file?.FileType?.value; + if (!fileType) + return { + status: "unsupported", + notes: ["ExifReader did not recognize this format."], + }; + const width = numericTag(tags.file?.["Image Width"]); + const height = numericTag(tags.file?.["Image Height"]); + let nodes = 0; + for (const [groupName, source] of Object.entries(GROUP_LABELS)) { + const group = tags[groupName as keyof ExpandedTags] as unknown; + if (!group || typeof group !== "object") continue; + for (const [name, tag] of Object.entries(group)) { + nodes += 1; + if (nodes > limits.maxFindings) { + collector.warn( + "ExifReader finding count reached the application limit.", + ); + return { + status: "partial", + width, + height, + notes: ["ExifReader output was truncated at the finding limit."], + }; + } + if (name.startsWith("_") || name === "base64" || name === "image") + continue; + const value = tagValue(tag); + if (!value) continue; + const classification = + groupName === "gps" + ? ({ category: "location", risk: "sensitive" } as const) + : categoryForName(`${groupName} ${name}`); + collector.add({ + ...classification, + source, + label: name, + value, + }); + } + } + if (tags.Thumbnail) { + const image = tags.Thumbnail.image; + const length = + image instanceof ArrayBuffer || image instanceof SharedArrayBuffer + ? image.byteLength + : image?.byteLength; + collector.add({ + category: "thumbnail", + risk: "sensitive", + source: "ExifReader thumbnail", + label: "Embedded thumbnail", + value: `${length ?? "unknown"} bytes`, + }); + } + const rawXmp = tags.xmp?._raw; + if (typeof rawXmp === "string") + scanXmp(rawXmp, "ExifReader XMP", undefined, collector); + if (width === undefined || height === undefined) + return { + status: "partial", + width, + height, + notes: [ + "ExifReader recognized the container but could not establish both pixel dimensions.", + ], + }; + return { status: "complete", width, height, notes: [] }; + } catch (error) { + return { + status: "failed", + notes: [ + `ExifReader could not complete: ${error instanceof Error ? error.message : "unknown error"}`, + ], + }; + } +} + +function numericTag(tag: unknown): number | undefined { + if (!tag || typeof tag !== "object") return undefined; + const value = (tag as { value?: unknown }).value; + return typeof value === "number" && Number.isFinite(value) + ? value + : undefined; +} + +function tagValue(tag: unknown): string { + if (tag == null) return ""; + if (typeof tag === "string" || typeof tag === "number") return String(tag); + if (Array.isArray(tag)) return tag.slice(0, 128).map(tagValue).join(", "); + if (ArrayBuffer.isView(tag)) return `${tag.byteLength} bytes`; + if (tag instanceof ArrayBuffer || tag instanceof SharedArrayBuffer) + return `${tag.byteLength} bytes`; + if (typeof tag === "object") { + const item = tag as { description?: unknown; value?: unknown }; + if (typeof item.description === "string") return item.description; + if (item.value !== undefined) return tagValue(item.value); + } + return ""; +} diff --git a/src/privacy/findings.ts b/src/privacy/findings.ts new file mode 100644 index 0000000..d902600 --- /dev/null +++ b/src/privacy/findings.ts @@ -0,0 +1,159 @@ +import type { + FindingCategory, + FindingRisk, + MetadataFinding, + PrivacyLimits, +} from "./model"; + +export class FindingCollector { + readonly findings: MetadataFinding[] = []; + readonly warnings: string[] = []; + limited = false; + readonly #keys = new Set(); + readonly #limits: Readonly; + #textChars = 0; + + constructor(limits: Readonly) { + this.#limits = limits; + } + + add( + finding: Omit & { + id?: string; + value: unknown; + }, + ): void { + if (this.limited) return; + const source = boundedLabel( + finding.source, + this.#limits.maxFindingLabelChars, + ); + const label = boundedLabel( + finding.label, + this.#limits.maxFindingLabelChars, + ); + let value = displayValue(finding.value); + if (value.length > this.#limits.maxFindingValueChars) { + value = `${value.slice(0, this.#limits.maxFindingValueChars)}…`; + this.warn( + `${source} ${label} was truncated to ${this.#limits.maxFindingValueChars} characters.`, + ); + } + const key = `${source}\u0000${label}\u0000${value}\u0000${finding.offset ?? ""}`; + if (this.#keys.has(key)) return; + const addedText = source.length + label.length + value.length; + if ( + this.findings.length >= this.#limits.maxFindings || + this.#textChars + addedText > this.#limits.maxFindingTextChars + ) { + this.limited = true; + this.warn( + `Metadata findings were truncated at ${this.#limits.maxFindings} entries or ${this.#limits.maxFindingTextChars} text characters.`, + ); + return; + } + this.#keys.add(key); + this.#textChars += addedText; + this.findings.push({ + ...finding, + source, + label, + id: + finding.id ?? + `${source.toLowerCase().replace(/[^a-z0-9]+/gu, "-")}-${this.findings.length + 1}`, + value, + }); + } + + warn(message: string): void { + if (!this.warnings.includes(message)) this.warnings.push(message); + } +} + +function boundedLabel(value: string, maximum: number): string { + const sanitized = sanitizeText(value); + return sanitized.length <= maximum + ? sanitized + : `${sanitized.slice(0, Math.max(0, maximum - 1))}…`; +} + +export function categoryForName(name: string): { + category: FindingCategory; + risk: FindingRisk; +} { + const normalized = name.toLowerCase(); + if ( + /(?:gps|latitude|longitude|location|city|country|province|state|sublocation|altitude)/u.test( + normalized, + ) + ) + return { category: "location", risk: "sensitive" }; + if ( + /(?:artist|author|creator|byline|credit|owner|person|copyright|rights|email)/u.test( + normalized, + ) + ) + return { category: "identity", risk: "sensitive" }; + if (/(?:date|time|created|modified|timestamp)/u.test(normalized)) + return { category: "timestamp", risk: "sensitive" }; + if ( + /(?:serial|camera|device|make|model|lens|makernote|ownername)/u.test( + normalized, + ) + ) + return { category: "device", risk: "sensitive" }; + if ( + /(?:software|history|creatortool|processing|hostcomputer)/u.test(normalized) + ) + return { category: "software", risk: "sensitive" }; + if ( + /(?:documentid|instanceid|uniqueid|originaldocumentid|assetid)/u.test( + normalized, + ) + ) + return { category: "document-id", risk: "sensitive" }; + if ( + /(?:comment|description|caption|headline|keyword|subject|title)/u.test( + normalized, + ) + ) + return { category: "comment", risk: "context" }; + if (/(?:thumbnail|preview)/u.test(normalized)) + return { category: "thumbnail", risk: "sensitive" }; + if (/(?:icc|profile|colorspace|colourspace)/u.test(normalized)) + return { category: "colour-profile", risk: "technical" }; + if (/(?:c2pa|jumbf|provenance|manifest|signature)/u.test(normalized)) + return { category: "provenance", risk: "context" }; + if ( + /(?:orientation|resolution|jfif|density|dimensions|pixel)/u.test(normalized) + ) + return { category: "technical", risk: "technical" }; + return { category: "unknown", risk: "context" }; +} + +function displayValue(value: unknown): string { + if (value == null) return ""; + if (typeof value === "string") return sanitizeText(value); + if (typeof value === "number" || typeof value === "bigint") + return String(value); + if (typeof value === "boolean") return value ? "Yes" : "No"; + if (value instanceof Uint8Array) return `${value.byteLength} bytes`; + if (Array.isArray(value)) return value.map(displayValue).join(", "); + try { + return sanitizeText(JSON.stringify(value)); + } catch { + return String(value); + } +} + +function sanitizeText(value: string): string { + return Array.from(value, (character) => { + const point = character.codePointAt(0) ?? 0; + if (point === 0) return "�"; + if ((point >= 1 && point <= 8) || point === 11 || point === 12) return " "; + if ((point >= 14 && point <= 31) || point === 127) return " "; + return character; + }) + .join("") + .trim(); +} diff --git a/src/privacy/index.ts b/src/privacy/index.ts new file mode 100644 index 0000000..b92c06a --- /dev/null +++ b/src/privacy/index.ts @@ -0,0 +1,7 @@ +export * from "./archive"; +export * from "./detect"; +export * from "./limits"; +export * from "./model"; +export * from "./sanitize"; +export * from "./scan-client"; +export * from "./scanner"; diff --git a/src/privacy/inflate.ts b/src/privacy/inflate.ts new file mode 100644 index 0000000..70894a4 --- /dev/null +++ b/src/privacy/inflate.ts @@ -0,0 +1,29 @@ +import { Unzlib } from "fflate"; + +import { PrivacyLimitError } from "./limits"; + +export function inflateZlibBounded( + input: Uint8Array, + maximumBytes: number, +): Uint8Array { + const chunks: Uint8Array[] = []; + let total = 0; + const inflater = new Unzlib((chunk) => { + total += chunk.byteLength; + if (total > maximumBytes) + throw new PrivacyLimitError( + "Inflated metadata size", + total, + maximumBytes, + ); + chunks.push(chunk.slice()); + }); + inflater.push(input, true); + const output = new Uint8Array(total); + let offset = 0; + for (const chunk of chunks) { + output.set(chunk, offset); + offset += chunk.byteLength; + } + return output; +} diff --git a/src/privacy/iptc.ts b/src/privacy/iptc.ts new file mode 100644 index 0000000..471ffaf --- /dev/null +++ b/src/privacy/iptc.ts @@ -0,0 +1,128 @@ +import { categoryForName, FindingCollector } from "./findings"; + +const DATASET_NAMES: Readonly> = Object.freeze({ + 5: "Object Name", + 25: "Keywords", + 55: "Date Created", + 60: "Time Created", + 80: "By-line", + 85: "By-line Title", + 90: "City", + 92: "Sublocation", + 95: "Province/State", + 100: "Country Code", + 101: "Country", + 105: "Headline", + 110: "Credit", + 115: "Source", + 116: "Copyright Notice", + 120: "Caption/Abstract", + 122: "Writer/Editor", +}); + +export function scanIptc( + bytes: Uint8Array, + source: string, + baseOffset: number, + collector: FindingCollector, +): void { + let offset = 0; + let datasets = 0; + while (offset + 5 <= bytes.byteLength) { + if (bytes[offset] !== 0x1c) { + offset += 1; + continue; + } + const record = bytes[offset + 1] ?? 0; + const dataset = bytes[offset + 2] ?? 0; + let length = ((bytes[offset + 3] ?? 0) << 8) | (bytes[offset + 4] ?? 0); + let header = 5; + if ((length & 0x8000) !== 0) { + const lengthBytes = length & 0x7fff; + if ( + lengthBytes < 1 || + lengthBytes > 4 || + offset + 5 + lengthBytes > bytes.byteLength + ) { + collector.warn(`${source} contains an invalid extended IPTC length.`); + return; + } + length = 0; + for (let index = 0; index < lengthBytes; index += 1) + length = length * 256 + (bytes[offset + 5 + index] ?? 0); + header += lengthBytes; + } + if (length > 1024 * 1024 || offset + header + length > bytes.byteLength) { + collector.warn( + `${source} contains a truncated or oversized IPTC dataset.`, + ); + return; + } + const valueBytes = bytes.subarray( + offset + header, + offset + header + length, + ); + const label = + record === 2 + ? (DATASET_NAMES[dataset] ?? `IPTC 2:${dataset}`) + : `IPTC ${record}:${dataset}`; + const classification = categoryForName(label); + collector.add({ + ...classification, + source, + label, + value: new TextDecoder("utf-8", { fatal: false }).decode(valueBytes), + offset: baseOffset + offset, + length: header + length, + }); + datasets += 1; + if (datasets > 2048) { + collector.warn(`${source} IPTC dataset count exceeded 2048.`); + return; + } + offset += header + length; + } +} + +export function findPhotoshopIptc( + bytes: Uint8Array, +): Array<{ bytes: Uint8Array; relativeOffset: number }> { + const result: Array<{ bytes: Uint8Array; relativeOffset: number }> = []; + let offset = bytes.byteLength >= 14 ? 14 : 0; + while (offset + 12 <= bytes.byteLength) { + if ( + bytes[offset] !== 0x38 || + bytes[offset + 1] !== 0x42 || + bytes[offset + 2] !== 0x49 || + bytes[offset + 3] !== 0x4d + ) { + offset += 1; + continue; + } + const resource = ((bytes[offset + 4] ?? 0) << 8) | (bytes[offset + 5] ?? 0); + const nameLength = bytes[offset + 6] ?? 0; + const paddedName = 1 + nameLength + ((1 + nameLength) % 2); + const sizeOffset = offset + 6 + paddedName; + if (sizeOffset + 4 > bytes.byteLength) break; + const length = readU32be(bytes, sizeOffset); + const dataOffset = sizeOffset + 4; + if (length > 8 * 1024 * 1024 || dataOffset + length > bytes.byteLength) + break; + if (resource === 0x0404) + result.push({ + bytes: bytes.subarray(dataOffset, dataOffset + length), + relativeOffset: dataOffset, + }); + offset = dataOffset + length + (length % 2); + } + return result; +} + +function readU32be(bytes: Uint8Array, offset: number): number { + return ( + (bytes[offset] ?? 0) * 0x1000000 + + ((bytes[offset + 1] ?? 0) << 16) + + ((bytes[offset + 2] ?? 0) << 8) + + (bytes[offset + 3] ?? 0) + ); +} diff --git a/src/privacy/jpeg.ts b/src/privacy/jpeg.ts new file mode 100644 index 0000000..2b7c01a --- /dev/null +++ b/src/privacy/jpeg.ts @@ -0,0 +1,323 @@ +import { FindingCollector } from "./findings"; +import { findPhotoshopIptc, scanIptc } from "./iptc"; +import type { MetadataBlock, PrivacyLimits } from "./model"; +import { scanTiff } from "./tiff"; +import { decodeMetadataText, scanXmp } from "./xmp"; + +export interface FormatScan { + width?: number; + height?: number; + orientation?: number; + animated: boolean; + multiImage: boolean; + complete: boolean; + blocks: MetadataBlock[]; +} + +const XMP_HEADER = "http://ns.adobe.com/xap/1.0/\u0000"; +const XMP_EXTENDED_HEADER = "http://ns.adobe.com/xmp/extension/\u0000"; + +export function scanJpeg( + bytes: Uint8Array, + collector: FindingCollector, + limits: Readonly, +): FormatScan { + const blocks: MetadataBlock[] = []; + if (bytes.byteLength < 4 || bytes[0] !== 0xff || bytes[1] !== 0xd8) { + collector.warn("JPEG start-of-image marker is missing."); + return { animated: false, multiImage: false, complete: false, blocks }; + } + let offset = 2; + let complete = true; + let width: number | undefined; + let height: number | undefined; + let orientation: number | undefined; + let multiImage = false; + let segments = 0; + let enteredScan = false; + while (offset < bytes.byteLength) { + if (bytes[offset] !== 0xff) { + collector.warn(`JPEG marker sync was lost at byte ${offset}.`); + complete = false; + break; + } + while (offset < bytes.byteLength && bytes[offset] === 0xff) offset += 1; + if (offset >= bytes.byteLength) { + complete = false; + break; + } + const marker = bytes[offset] ?? 0; + offset += 1; + if (marker === 0xd9) break; + if (marker === 0xda) { + enteredScan = true; + break; + } + if (marker === 0x01 || (marker >= 0xd0 && marker <= 0xd8)) continue; + if (offset + 2 > bytes.byteLength) { + collector.warn("JPEG segment length is truncated."); + complete = false; + break; + } + const segmentLength = + ((bytes[offset] ?? 0) << 8) | (bytes[offset + 1] ?? 0); + if (segmentLength < 2 || offset + segmentLength > bytes.byteLength) { + collector.warn( + `JPEG marker 0x${marker.toString(16)} has an invalid length.`, + ); + complete = false; + break; + } + segments += 1; + if (segments > limits.maxMetadataBlocks) { + collector.warn( + `JPEG segment count exceeded ${limits.maxMetadataBlocks}.`, + ); + complete = false; + break; + } + const dataOffset = offset + 2; + const dataLength = segmentLength - 2; + const data = bytes.subarray(dataOffset, dataOffset + dataLength); + if (isStartOfFrame(marker) && data.byteLength >= 5) { + height = ((data[1] ?? 0) << 8) | (data[2] ?? 0); + width = ((data[3] ?? 0) << 8) | (data[4] ?? 0); + } + if (marker >= 0xe0 && marker <= 0xef) { + if (dataLength > limits.maxMetadataBlockBytes) { + collector.warn( + `JPEG APP${marker - 0xe0} metadata exceeds the block limit.`, + ); + complete = false; + } else { + blocks.push({ + kind: `APP${marker - 0xe0}`, + offset: dataOffset, + length: dataLength, + }); + const result = scanJpegApplication( + marker, + data, + dataOffset, + collector, + limits, + ); + if (result.orientation !== undefined) orientation = result.orientation; + multiImage ||= result.multiImage; + complete &&= result.complete; + } + } else if (marker === 0xfe) { + blocks.push({ kind: "COM", offset: dataOffset, length: dataLength }); + collector.add({ + category: "comment", + risk: "context", + source: "JPEG COM", + label: "Comment", + value: decodeMetadataText(data), + offset: dataOffset, + length: dataLength, + }); + } + offset += segmentLength; + } + const eoi = enteredScan + ? findJpegEnd(bytes, offset) + : bytes.lastIndexOf(0xd9); + if (eoi < 1 || bytes[eoi - 1] !== 0xff) { + collector.warn("JPEG end-of-image marker was not found."); + complete = false; + } else if (eoi + 1 < bytes.byteLength) { + const trailing = bytes.byteLength - eoi - 1; + blocks.push({ kind: "trailing-data", offset: eoi + 1, length: trailing }); + collector.add({ + category: "unknown", + risk: "sensitive", + source: "JPEG", + label: "Trailing data", + value: `${trailing} bytes after end-of-image`, + offset: eoi + 1, + length: trailing, + }); + } + return { + width, + height, + orientation, + animated: false, + multiImage, + complete, + blocks, + }; +} + +function scanJpegApplication( + marker: number, + data: Uint8Array, + offset: number, + collector: FindingCollector, + limits: Readonly, +): { orientation?: number; multiImage: boolean; complete: boolean } { + if (marker === 0xe0 && ascii(data, 0, 5) === "JFIF\u0000") { + const thumbnailWidth = data[12] ?? 0; + const thumbnailHeight = data[13] ?? 0; + collector.add({ + category: thumbnailWidth && thumbnailHeight ? "thumbnail" : "technical", + risk: thumbnailWidth && thumbnailHeight ? "sensitive" : "technical", + source: "JPEG APP0", + label: "JFIF header", + value: `version ${data[5] ?? 0}.${String(data[6] ?? 0).padStart(2, "0")}; density ${readU16be(data, 8)}×${readU16be(data, 10)}; thumbnail ${thumbnailWidth}×${thumbnailHeight}`, + offset, + length: data.byteLength, + }); + return { multiImage: false, complete: true }; + } + if (marker === 0xe1 && ascii(data, 0, 6) === "Exif\u0000\u0000") { + const result = scanTiff( + data.subarray(6), + "JPEG EXIF", + offset + 6, + collector, + limits, + ); + return { + orientation: result.orientation, + multiImage: false, + complete: result.complete, + }; + } + if (marker === 0xe1 && ascii(data, 0, XMP_HEADER.length) === XMP_HEADER) { + scanXmp(data.subarray(XMP_HEADER.length), "JPEG XMP", offset, collector); + return { multiImage: false, complete: true }; + } + if ( + marker === 0xe1 && + ascii(data, 0, XMP_EXTENDED_HEADER.length) === XMP_EXTENDED_HEADER + ) { + scanXmp( + data.subarray(XMP_EXTENDED_HEADER.length), + "JPEG extended XMP", + offset, + collector, + ); + return { multiImage: false, complete: true }; + } + if (marker === 0xed && ascii(data, 0, 13) === "Photoshop 3.0") { + const resources = findPhotoshopIptc(data); + for (const resource of resources) + scanIptc( + resource.bytes, + "JPEG IPTC", + offset + resource.relativeOffset, + collector, + ); + if (resources.length === 0) + collector.add({ + category: "unknown", + risk: "context", + source: "JPEG APP13", + label: "Photoshop image resources", + value: `${data.byteLength} bytes`, + offset, + length: data.byteLength, + }); + return { multiImage: false, complete: true }; + } + if (marker === 0xe2 && ascii(data, 0, 12) === "ICC_PROFILE\u0000") { + collector.add({ + category: "colour-profile", + risk: "technical", + source: "JPEG APP2", + label: "ICC profile chunk", + value: `chunk ${data[12] ?? 0} of ${data[13] ?? 0}; ${Math.max(0, data.byteLength - 14)} bytes`, + offset, + length: data.byteLength, + }); + return { multiImage: false, complete: true }; + } + if (marker === 0xe2 && ascii(data, 0, 4) === "MPF\u0000") { + collector.add({ + category: "thumbnail", + risk: "sensitive", + source: "JPEG APP2", + label: "Multi-Picture Format", + value: `${data.byteLength} bytes; additional images may be embedded`, + offset, + length: data.byteLength, + }); + return { multiImage: true, complete: true }; + } + if (marker === 0xeb && containsAscii(data, ["jumb", "c2pa"])) { + collector.add({ + category: "provenance", + risk: "context", + source: "JPEG APP11", + label: "JUMBF / C2PA provenance data", + value: `${data.byteLength} bytes; re-encoding will remove or invalidate this provenance`, + offset, + length: data.byteLength, + }); + return { multiImage: false, complete: true }; + } + if (marker === 0xee && ascii(data, 0, 5) === "Adobe") { + collector.add({ + category: "technical", + risk: "technical", + source: "JPEG APP14", + label: "Adobe colour transform header", + value: `${data.byteLength} bytes`, + offset, + length: data.byteLength, + }); + return { multiImage: false, complete: true }; + } + collector.add({ + category: containsAscii(data, ["c2pa", "jumb"]) ? "provenance" : "unknown", + risk: "context", + source: `JPEG APP${marker - 0xe0}`, + label: "Unrecognized application metadata", + value: `${data.byteLength} bytes`, + offset, + length: data.byteLength, + }); + return { multiImage: false, complete: true }; +} + +function isStartOfFrame(marker: number): boolean { + return ( + marker >= 0xc0 && marker <= 0xcf && ![0xc4, 0xc8, 0xcc].includes(marker) + ); +} + +function findJpegEnd(bytes: Uint8Array, offset: number): number { + for (let index = offset; index + 1 < bytes.byteLength; index += 1) { + if (bytes[index] !== 0xff) continue; + const marker = bytes[index + 1] ?? 0; + if (marker === 0x00 || (marker >= 0xd0 && marker <= 0xd7)) { + index += 1; + continue; + } + if (marker === 0xd9) return index + 1; + } + return -1; +} + +function ascii(bytes: Uint8Array, offset: number, length: number): string { + if (offset < 0 || offset + length > bytes.byteLength) return ""; + let result = ""; + for (let index = 0; index < length; index += 1) + result += String.fromCharCode(bytes[offset + index] ?? 0); + return result; +} + +function containsAscii(bytes: Uint8Array, needles: readonly string[]): boolean { + const sample = ascii( + bytes.subarray(0, Math.min(bytes.byteLength, 4096)), + 0, + Math.min(bytes.byteLength, 4096), + ).toLowerCase(); + return needles.some((needle) => sample.includes(needle)); +} + +function readU16be(bytes: Uint8Array, offset: number): number { + return ((bytes[offset] ?? 0) << 8) | (bytes[offset + 1] ?? 0); +} diff --git a/src/privacy/limits.ts b/src/privacy/limits.ts new file mode 100644 index 0000000..8a5325b --- /dev/null +++ b/src/privacy/limits.ts @@ -0,0 +1,73 @@ +import type { PrivacyLimits } from "./model"; + +export const DEFAULT_PRIVACY_LIMITS: Readonly = Object.freeze({ + maxFiles: 100, + maxFileBytes: 128 * 1024 * 1024, + maxBatchBytes: 512 * 1024 * 1024, + maxMetadataBlocks: 4096, + maxMetadataBlockBytes: 8 * 1024 * 1024, + maxInflatedMetadataBytes: 4 * 1024 * 1024, + maxFindingLabelChars: 512, + maxFindingValueChars: 16_384, + maxFindingTextChars: 256 * 1024, + maxFindings: 4096, + maxTiffEntries: 4096, + maxTiffDepth: 16, + maxPixels: 40_000_000, + maxEdge: 32_768, + maxZipBytes: 256 * 1024 * 1024, +}); + +export class PrivacyLimitError extends RangeError { + readonly actual: number; + readonly limit: number; + + constructor(label: string, actual: number, limit: number) { + super(`${label} is ${actual}; the limit is ${limit}`); + this.name = "PrivacyLimitError"; + this.actual = actual; + this.limit = limit; + } +} + +export function assertLimit( + actual: number, + limit: number, + label: string, +): void { + if (!Number.isSafeInteger(actual) || actual < 0) + throw new TypeError(`${label} is not a valid non-negative integer`); + if (!Number.isSafeInteger(limit) || limit <= 0) + throw new TypeError(`${label} limit is not a positive safe integer`); + if (actual > limit) throw new PrivacyLimitError(label, actual, limit); +} + +export function resolveLimits( + overrides: Partial = {}, +): Readonly { + const merged = { ...DEFAULT_PRIVACY_LIMITS, ...overrides }; + for (const [name, value] of Object.entries(merged)) { + if (!Number.isSafeInteger(value) || value <= 0) + throw new TypeError(`${name} must be a positive safe integer`); + } + return Object.freeze(merged); +} + +export function assertBatchFiles( + files: readonly { size: number }[], + limits: Readonly = DEFAULT_PRIVACY_LIMITS, +): void { + assertLimit(files.length, limits.maxFiles, "File count"); + let total = 0; + for (const file of files) { + assertLimit(file.size, limits.maxFileBytes, "File size"); + total += file.size; + if (!Number.isSafeInteger(total)) + throw new PrivacyLimitError( + "Batch byte size", + Number.MAX_SAFE_INTEGER, + limits.maxBatchBytes, + ); + assertLimit(total, limits.maxBatchBytes, "Batch byte size"); + } +} diff --git a/src/privacy/model.ts b/src/privacy/model.ts new file mode 100644 index 0000000..2cb3a57 --- /dev/null +++ b/src/privacy/model.ts @@ -0,0 +1,156 @@ +export type DetectedKind = + | "jpeg" + | "png" + | "webp" + | "gif" + | "tiff" + | "heic" + | "avif" + | "jxl" + | "pdf" + | "zip" + | "ole" + | "unknown"; + +export type FindingCategory = + | "location" + | "identity" + | "timestamp" + | "device" + | "software" + | "document-id" + | "comment" + | "thumbnail" + | "colour-profile" + | "provenance" + | "technical" + | "unknown"; + +export type FindingRisk = "sensitive" | "context" | "technical"; + +export interface MetadataFinding { + id: string; + category: FindingCategory; + risk: FindingRisk; + source: string; + label: string; + value: string; + offset?: number; + length?: number; +} + +export interface MetadataBlock { + kind: string; + offset: number; + length: number; +} + +export interface ParserCoverage { + projectScanner: "complete" | "partial" | "unsupported"; + secondaryScanner: "complete" | "partial" | "unsupported" | "failed"; + notes: string[]; +} + +export interface InventoryIdentity { + claimedType: string; + extension: string; + detectedKind: DetectedKind; + detectedType: string; + typeMatch: "match" | "mismatch" | "unclaimed" | "unknown"; +} + +export interface ImageScanResult { + id: string; + name: string; + safeName: string; + size: number; + lastModified: number; + sha256: string; + identity: InventoryIdentity; + width?: number; + height?: number; + orientation?: number; + animated: boolean; + multiImage: boolean; + deepSupported: boolean; + cleanable: boolean; + findings: MetadataFinding[]; + blocks: MetadataBlock[]; + warnings: string[]; + coverage: ParserCoverage; +} + +export interface ScanInput { + id: string; + name: string; + claimedType: string; + size: number; + lastModified: number; + bytes: ArrayBuffer; +} + +export type SanitizationStatus = "verified" | "warning" | "failed"; + +export interface PixelComparison { + method: "oriented-256px-sample"; + sourceDigest: string; + outputDigest: string; + identical: boolean; + note: string; +} + +export interface SanitizationReport { + sourceId: string; + sourceName: string; + outputName: string; + outputType: string; + sourceSha256: string; + outputSha256: string; + sourceBytes: number; + outputBytes: number; + sourceDimensions?: { width: number; height: number }; + outputDimensions?: { width: number; height: number }; + orientationNormalized: boolean; + removed: MetadataFinding[]; + preserved: MetadataFinding[]; + generated: MetadataFinding[]; + unsupported: string[]; + incomplete: string[]; + outputScan: ImageScanResult; + pixelComparison: PixelComparison; + status: SanitizationStatus; + summary: string; + disclaimer: string; +} + +export interface SanitizedAsset { + blob: Blob; + report: SanitizationReport; +} + +export interface BatchReport { + schemaVersion: 1; + generatedAt: string; + application: { name: "Privacy Tools"; version: "0.1.0" }; + files: ImageScanResult[]; + sanitizations: SanitizationReport[]; + warnings: string[]; +} + +export interface PrivacyLimits { + maxFiles: number; + maxFileBytes: number; + maxBatchBytes: number; + maxMetadataBlocks: number; + maxMetadataBlockBytes: number; + maxInflatedMetadataBytes: number; + maxFindingLabelChars: number; + maxFindingValueChars: number; + maxFindingTextChars: number; + maxFindings: number; + maxTiffEntries: number; + maxTiffDepth: number; + maxPixels: number; + maxEdge: number; + maxZipBytes: number; +} diff --git a/src/privacy/png.ts b/src/privacy/png.ts new file mode 100644 index 0000000..4c1df90 --- /dev/null +++ b/src/privacy/png.ts @@ -0,0 +1,359 @@ +import { crc32 } from "@add-ideas/toolbox-helpers"; + +import { FindingCollector } from "./findings"; +import { inflateZlibBounded } from "./inflate"; +import type { MetadataBlock, PrivacyLimits } from "./model"; +import type { FormatScan } from "./jpeg"; +import { scanTiff } from "./tiff"; +import { decodeMetadataText, scanXmp } from "./xmp"; + +export function scanPng( + bytes: Uint8Array, + collector: FindingCollector, + limits: Readonly, +): FormatScan { + const blocks: MetadataBlock[] = []; + let offset = 8; + let width: number | undefined; + let height: number | undefined; + let orientation: number | undefined; + let animated = false; + let complete = true; + let chunks = 0; + let sawEnd = false; + let sawHeader = false; + let sawImageData = false; + while (offset + 12 <= bytes.byteLength) { + const length = readU32be(bytes, offset); + const type = ascii(bytes, offset + 4, 4); + const dataOffset = offset + 8; + const end = dataOffset + length; + if (!/^[A-Za-z]{4}$/u.test(type) || end + 4 > bytes.byteLength) { + collector.warn(`PNG chunk at byte ${offset} is malformed or truncated.`); + complete = false; + break; + } + chunks += 1; + if (chunks > limits.maxMetadataBlocks) { + collector.warn(`PNG chunk count exceeded ${limits.maxMetadataBlocks}.`); + complete = false; + break; + } + const data = bytes.subarray(dataOffset, end); + const expectedCrc = readU32be(bytes, end); + const crcInput = bytes.subarray(offset + 4, end); + if (crc32(crcInput, limits.maxFileBytes) !== expectedCrc) { + collector.warn(`PNG ${type} chunk at byte ${offset} has an invalid CRC.`); + complete = false; + } + if (chunks === 1 && type !== "IHDR") { + collector.warn("PNG IHDR is not the first chunk."); + complete = false; + } + if (type === "IHDR") { + if (sawHeader || chunks !== 1 || length !== 13) { + collector.warn("PNG IHDR is duplicated, misplaced, or malformed."); + complete = false; + } else { + width = readU32be(data, 0); + height = readU32be(data, 4); + } + sawHeader = true; + } else if (type === "IDAT") { + sawImageData = true; + } else if (type === "IEND") { + if (length !== 0) { + collector.warn("PNG IEND chunk is not empty."); + complete = false; + } + sawEnd = true; + offset = end + 4; + break; + } else if (type === "acTL" || type === "fcTL" || type === "fdAT") { + animated = true; + blocks.push({ kind: type, offset: dataOffset, length }); + collector.add({ + category: "technical", + risk: "context", + source: "PNG", + label: "APNG animation", + value: `${type} chunk (${length} bytes)`, + offset: dataOffset, + length, + }); + } else if (isMetadataChunk(type)) { + if (length > limits.maxMetadataBlockBytes) { + collector.warn(`PNG ${type} metadata exceeds the block limit.`); + complete = false; + } else { + blocks.push({ kind: type, offset: dataOffset, length }); + const result = scanPngMetadata( + type, + data, + dataOffset, + collector, + limits, + ); + if (result.orientation !== undefined) orientation = result.orientation; + complete &&= result.complete; + } + } else if (type[1] === type[1]?.toLowerCase()) { + blocks.push({ kind: type, offset: dataOffset, length }); + collector.add({ + category: type === "caBX" ? "provenance" : "unknown", + risk: "context", + source: "PNG", + label: + type === "caBX" ? "C2PA provenance chunk" : `Private chunk ${type}`, + value: `${length} bytes`, + offset: dataOffset, + length, + }); + } + offset = end + 4; + } + if (!sawEnd) { + collector.warn("PNG IEND chunk was not found."); + complete = false; + } else if (offset < bytes.byteLength) { + const trailing = bytes.byteLength - offset; + blocks.push({ kind: "trailing-data", offset, length: trailing }); + collector.add({ + category: "unknown", + risk: "sensitive", + source: "PNG", + label: "Trailing data", + value: `${trailing} bytes after IEND`, + offset, + length: trailing, + }); + } + if (!sawHeader) { + collector.warn("PNG IHDR chunk was not found."); + complete = false; + } + if (!sawImageData) { + collector.warn("PNG IDAT image data was not found."); + complete = false; + } + return { + width, + height, + orientation, + animated, + multiImage: false, + complete, + blocks, + }; +} + +function scanPngMetadata( + type: string, + data: Uint8Array, + offset: number, + collector: FindingCollector, + limits: Readonly, +): { orientation?: number; complete: boolean } { + try { + if (type === "eXIf") { + const result = scanTiff(data, "PNG eXIf", offset, collector, limits); + return { orientation: result.orientation, complete: result.complete }; + } + if (type === "tEXt") { + const separator = data.indexOf(0); + const keyword = decodeLatin( + data.subarray(0, separator < 0 ? data.length : separator), + ); + const value = + separator < 0 ? "" : decodeLatin(data.subarray(separator + 1)); + addPngText(keyword, value, type, offset, data.byteLength, collector); + } else if (type === "zTXt") { + const separator = data.indexOf(0); + if (separator < 0 || data[separator + 1] !== 0) + throw new SyntaxError("invalid zTXt header"); + const keyword = decodeLatin(data.subarray(0, separator)); + const inflated = inflateZlibBounded( + data.subarray(separator + 2), + limits.maxInflatedMetadataBytes, + ); + addPngText( + keyword, + decodeLatin(inflated), + type, + offset, + data.byteLength, + collector, + ); + } else if (type === "iTXt") { + const parsed = parseInternationalText( + data, + limits.maxInflatedMetadataBytes, + ); + addPngText( + parsed.keyword, + parsed.text, + type, + offset, + data.byteLength, + collector, + ); + } else if (type === "iCCP") { + const separator = data.indexOf(0); + if (separator < 0 || data[separator + 1] !== 0) + throw new SyntaxError("invalid iCCP header"); + const profile = inflateZlibBounded( + data.subarray(separator + 2), + limits.maxInflatedMetadataBytes, + ); + collector.add({ + category: "colour-profile", + risk: "technical", + source: "PNG iCCP", + label: "ICC profile", + value: `${decodeLatin(data.subarray(0, separator)) || "unnamed"}; ${profile.byteLength} bytes inflated`, + offset, + length: data.byteLength, + }); + } else if (type === "pHYs") { + collector.add({ + category: "technical", + risk: "technical", + source: "PNG pHYs", + label: "Pixel density", + value: `${readU32be(data, 0)}×${readU32be(data, 4)} per ${data[8] === 1 ? "metre" : "unknown unit"}`, + offset, + length: data.byteLength, + }); + } else if (type === "tIME" && data.byteLength === 7) { + collector.add({ + category: "timestamp", + risk: "sensitive", + source: "PNG tIME", + label: "Last modification time", + value: `${readU16be(data, 0)}-${pad(data[2])}-${pad(data[3])} ${pad(data[4])}:${pad(data[5])}:${pad(data[6])} UTC-like fields`, + offset, + length: data.byteLength, + }); + } else if (type === "caBX") { + collector.add({ + category: "provenance", + risk: "context", + source: "PNG caBX", + label: "C2PA provenance data", + value: `${data.byteLength} bytes; re-encoding will remove or invalidate this provenance`, + offset, + length: data.byteLength, + }); + } + return { complete: true }; + } catch (error) { + collector.warn( + `PNG ${type} metadata could not be fully read: ${error instanceof Error ? error.message : "unknown error"}.`, + ); + return { complete: false }; + } +} + +function addPngText( + keyword: string, + value: string, + type: string, + offset: number, + length: number, + collector: FindingCollector, +): void { + if (/xmp/iu.test(keyword) || /<\?xpacket|= data.byteLength) + throw new SyntaxError("invalid iTXt header"); + const compressed = data[first + 1] === 1; + if ((data[first + 1] !== 0 && !compressed) || data[first + 2] !== 0) + throw new SyntaxError("unsupported iTXt compression"); + const languageEnd = data.indexOf(0, first + 3); + if (languageEnd < 0) throw new SyntaxError("truncated iTXt language tag"); + const translatedEnd = data.indexOf(0, languageEnd + 1); + if (translatedEnd < 0) + throw new SyntaxError("truncated iTXt translated keyword"); + const payload = data.subarray(translatedEnd + 1); + return { + keyword: decodeLatin(data.subarray(0, first)), + text: decodeMetadataText( + compressed ? inflateZlibBounded(payload, maximumInflatedBytes) : payload, + ), + }; +} + +function isMetadataChunk(type: string): boolean { + return [ + "tEXt", + "zTXt", + "iTXt", + "eXIf", + "iCCP", + "pHYs", + "tIME", + "caBX", + ].includes(type); +} + +function readU32be(bytes: Uint8Array, offset: number): number { + return ( + (bytes[offset] ?? 0) * 0x1000000 + + ((bytes[offset + 1] ?? 0) << 16) + + ((bytes[offset + 2] ?? 0) << 8) + + (bytes[offset + 3] ?? 0) + ); +} + +function readU16be(bytes: Uint8Array, offset: number): number { + return ((bytes[offset] ?? 0) << 8) | (bytes[offset + 1] ?? 0); +} + +function ascii(bytes: Uint8Array, offset: number, length: number): string { + let value = ""; + for ( + let index = 0; + index < length && offset + index < bytes.length; + index += 1 + ) + value += String.fromCharCode(bytes[offset + index] ?? 0); + return value; +} + +function decodeLatin(bytes: Uint8Array): string { + return new TextDecoder("latin1", { fatal: false }).decode(bytes); +} + +function pad(value: number | undefined): string { + return String(value ?? 0).padStart(2, "0"); +} diff --git a/src/privacy/sanitize.ts b/src/privacy/sanitize.ts new file mode 100644 index 0000000..771b74c --- /dev/null +++ b/src/privacy/sanitize.ts @@ -0,0 +1,435 @@ +import { + digestHex, + sanitizeDownloadFilename, +} from "@add-ideas/toolbox-helpers"; + +import type { + ImageScanResult, + MetadataFinding, + PixelComparison, + SanitizedAsset, + SanitizationReport, +} from "./model"; +import { scanImageBytes } from "./scanner"; + +export interface SanitizeOptions { + jpegQuality?: number; + webpQuality?: number; + signal?: AbortSignal; +} + +export async function sanitizeStaticImage( + file: File, + source: ImageScanResult, + options: SanitizeOptions = {}, +): Promise { + if (!source.cleanable) + throw new TypeError( + `${source.name} is not a supported static clean-copy input.`, + ); + if (source.coverage.projectScanner !== "complete") + throw new TypeError("The source project scan is not complete."); + if (file.size !== source.size || file.name !== source.name) + throw new TypeError( + "The selected source file no longer matches its scan result.", + ); + throwIfAborted(options.signal); + await verifySourceHash(file, source); + throwIfAborted(options.signal); + const mime = outputMime(source.identity.detectedKind); + const decoded = await decodeDrawable(file, source, options.signal); + const canvas = document.createElement("canvas"); + canvas.width = decoded.outputWidth; + canvas.height = decoded.outputHeight; + const context = canvas.getContext("2d", { + alpha: true, + colorSpace: "srgb", + willReadFrequently: false, + }); + if (!context) throw new Error("The browser did not provide a 2D canvas."); + context.save(); + applyOrientationTransform( + context, + decoded.orientationToApply, + decoded.rawWidth, + decoded.rawHeight, + ); + context.drawImage(decoded.drawable, 0, 0); + context.restore(); + decoded.close(); + throwIfAborted(options.signal); + const sourceSample = await sampleDigest(canvas); + const quality = + mime === "image/jpeg" + ? boundedQuality(options.jpegQuality ?? 0.92) + : mime === "image/webp" + ? boundedQuality(options.webpQuality ?? 0.92) + : undefined; + const blob = await canvasToBlob(canvas, mime, quality); + if (blob.type !== mime) + throw new Error( + `This browser encoded ${blob.type || "an unknown format"} instead of ${mime}.`, + ); + throwIfAborted(options.signal); + const outputBytes = await blob.arrayBuffer(); + const outputName = cleanOutputName( + source.safeName, + source.identity.detectedKind, + ); + const outputScan = await scanImageBytes({ + id: `${source.id}-clean`, + name: outputName, + claimedType: mime, + size: outputBytes.byteLength, + lastModified: 0, + bytes: outputBytes, + }); + const outputSample = await sampleBlobDigest(blob); + const pixelComparison: PixelComparison = { + method: "oriented-256px-sample", + sourceDigest: sourceSample, + outputDigest: outputSample, + identical: sourceSample === outputSample, + note: + mime === "image/png" + ? "The decoded, orientation-normalized sample should normally be identical." + : "JPEG and lossy WebP encoding may change decoded sample pixels even when the visible image is preserved.", + }; + const report = buildSanitizationReport( + source, + outputScan, + outputName, + mime, + blob.size, + pixelComparison, + ); + return { blob, report }; +} + +export function buildSanitizationReport( + source: ImageScanResult, + output: ImageScanResult, + outputName: string, + outputType: string, + outputBytes: number, + pixelComparison: PixelComparison, +): SanitizationReport { + const outputKeys = new Set(output.findings.map(findingSignature)); + const sourceKeys = new Set(source.findings.map(findingSignature)); + const removed = source.findings.filter( + (finding) => !outputKeys.has(findingSignature(finding)), + ); + const preserved = source.findings.filter((finding) => + outputKeys.has(findingSignature(finding)), + ); + const generated = output.findings.filter( + (finding) => !sourceKeys.has(findingSignature(finding)), + ); + const unsupported: string[] = []; + const incomplete: string[] = []; + if (source.coverage.projectScanner !== "complete") + incomplete.push( + "The source project scanner did not reach complete coverage.", + ); + if (source.coverage.secondaryScanner !== "complete") + incomplete.push( + `The source secondary scanner status was ${source.coverage.secondaryScanner}.`, + ); + if (output.coverage.projectScanner !== "complete") + incomplete.push( + "The output project scanner did not reach complete coverage.", + ); + if (output.coverage.secondaryScanner !== "complete") + incomplete.push( + `The output secondary scanner status was ${output.coverage.secondaryScanner}.`, + ); + if (source.findings.some((finding) => finding.category === "provenance")) + unsupported.push( + "Source provenance/signature data was removed or invalidated; authenticity cannot be carried through pixel re-encoding.", + ); + const dimensionsMatch = + source.width === undefined || + source.height === undefined || + (output.width === expectedWidth(source) && + output.height === expectedHeight(source)); + if (!dimensionsMatch) + incomplete.push( + "Output dimensions do not match the expected oriented dimensions.", + ); + const orientationNormalized = + (output.orientation === undefined || output.orientation === 1) && + dimensionsMatch; + if (!orientationNormalized) + incomplete.push("Output orientation was not normalized to pixel order."); + if (output.identity.typeMatch !== "match") + incomplete.push("Output type, filename, or detected bytes do not agree."); + if (outputType === "image/png" && !pixelComparison.identical) + incomplete.push( + "Lossless PNG output did not preserve the decoded pixel sample.", + ); + const unsafeOutput = output.findings.filter( + (finding) => + finding.risk === "sensitive" || + finding.category === "comment" || + finding.category === "provenance", + ); + const unexpectedBlocks = findUnexpectedOutputBlocks(output); + if (unexpectedBlocks.length > 0) + incomplete.push( + `Output contains unexpected metadata blocks: ${unexpectedBlocks.join(", ")}.`, + ); + const failed = + output.coverage.projectScanner !== "complete" || + unsafeOutput.length > 0 || + output.animated || + output.multiImage || + !orientationNormalized || + output.identity.typeMatch !== "match" || + (outputType === "image/png" && !pixelComparison.identical); + const warning = + incomplete.length > 0 || + output.coverage.secondaryScanner !== "complete" || + unsupported.length > 0; + const status = failed ? "failed" : warning ? "warning" : "verified"; + return { + sourceId: source.id, + sourceName: source.name, + outputName, + outputType, + sourceSha256: source.sha256, + outputSha256: output.sha256, + sourceBytes: source.size, + outputBytes, + sourceDimensions: + source.width !== undefined && source.height !== undefined + ? { width: source.width, height: source.height } + : undefined, + outputDimensions: + output.width !== undefined && output.height !== undefined + ? { width: output.width, height: output.height } + : undefined, + orientationNormalized, + removed, + preserved, + generated, + unsupported, + incomplete, + outputScan: output, + pixelComparison, + status, + summary: + status === "verified" + ? "The pixel re-encode completed and both bounded output scanners found no sensitive metadata." + : status === "warning" + ? "The pixel re-encode completed, but one or more verification limits require review." + : "The output did not pass the mandatory metadata verification gate.", + disclaimer: + "This report is not an anonymity guarantee. Visible faces or text, steganography, invisible watermarks, reverse-image matching, sidecars, filesystem records, and cloud copies are outside this tool's checks.", + }; +} + +async function verifySourceHash( + file: File, + source: ImageScanResult, +): Promise { + const bytes = new Uint8Array(await file.arrayBuffer()); + const currentHash = await digestHex(bytes, "SHA-256", source.size); + if (currentHash !== source.sha256) + throw new TypeError( + "The selected source bytes no longer match their scan hash.", + ); +} + +function findUnexpectedOutputBlocks(output: ImageScanResult): string[] { + const allowed = + output.identity.detectedKind === "jpeg" + ? new Set(["APP0", "APP2"]) + : output.identity.detectedKind === "png" + ? new Set(["iCCP", "pHYs"]) + : output.identity.detectedKind === "webp" + ? new Set(["ICCP"]) + : new Set(); + return [...new Set(output.blocks.map((block) => block.kind))].filter( + (kind) => !allowed.has(kind), + ); +} + +interface DecodedDrawable { + drawable: CanvasImageSource; + rawWidth: number; + rawHeight: number; + outputWidth: number; + outputHeight: number; + orientationToApply: number; + close(): void; +} + +async function decodeDrawable( + file: File, + source: ImageScanResult, + signal?: AbortSignal, +): Promise { + if ("createImageBitmap" in globalThis) { + const bitmap = await createImageBitmap(file, { imageOrientation: "none" }); + throwIfAborted(signal); + const orientation = normalizeOrientation(source.orientation); + const scannerWidth = source.width ?? bitmap.width; + const scannerHeight = source.height ?? bitmap.height; + const browserAlreadyOriented = + swapsAxes(orientation) && + bitmap.width === scannerHeight && + bitmap.height === scannerWidth; + const orientationToApply = browserAlreadyOriented ? 1 : orientation; + return { + drawable: bitmap, + rawWidth: bitmap.width, + rawHeight: bitmap.height, + outputWidth: swapsAxes(orientationToApply) ? bitmap.height : bitmap.width, + outputHeight: swapsAxes(orientationToApply) + ? bitmap.width + : bitmap.height, + orientationToApply, + close: () => bitmap.close(), + }; + } + const url = URL.createObjectURL(file); + try { + const image = new Image(); + image.decoding = "async"; + image.src = url; + await image.decode(); + throwIfAborted(signal); + return { + drawable: image, + rawWidth: image.naturalWidth, + rawHeight: image.naturalHeight, + outputWidth: image.naturalWidth, + outputHeight: image.naturalHeight, + orientationToApply: 1, + close: () => undefined, + }; + } finally { + URL.revokeObjectURL(url); + } +} + +function applyOrientationTransform( + context: CanvasRenderingContext2D, + orientation: number, + width: number, + height: number, +): void { + if (orientation === 2) context.transform(-1, 0, 0, 1, width, 0); + else if (orientation === 3) context.transform(-1, 0, 0, -1, width, height); + else if (orientation === 4) context.transform(1, 0, 0, -1, 0, height); + else if (orientation === 5) context.transform(0, 1, 1, 0, 0, 0); + else if (orientation === 6) context.transform(0, 1, -1, 0, height, 0); + else if (orientation === 7) context.transform(0, -1, -1, 0, height, width); + else if (orientation === 8) context.transform(0, -1, 1, 0, 0, width); +} + +async function sampleDigest(canvas: HTMLCanvasElement): Promise { + const maximum = 256; + const scale = Math.min(1, maximum / canvas.width, maximum / canvas.height); + const width = Math.max(1, Math.round(canvas.width * scale)); + const height = Math.max(1, Math.round(canvas.height * scale)); + const sample = document.createElement("canvas"); + sample.width = width; + sample.height = height; + const context = sample.getContext("2d", { willReadFrequently: true }); + if (!context) + throw new Error("The browser could not create a verification canvas."); + context.drawImage(canvas, 0, 0, width, height); + const pixels = context.getImageData(0, 0, width, height).data; + return digestHex(pixels, "SHA-256", maximum * maximum * 4); +} + +async function sampleBlobDigest(blob: Blob): Promise { + const bitmap = await createImageBitmap(blob, { imageOrientation: "none" }); + try { + const canvas = document.createElement("canvas"); + canvas.width = bitmap.width; + canvas.height = bitmap.height; + const context = canvas.getContext("2d"); + if (!context) + throw new Error("The browser could not decode output pixels."); + context.drawImage(bitmap, 0, 0); + return sampleDigest(canvas); + } finally { + bitmap.close(); + } +} + +function canvasToBlob( + canvas: HTMLCanvasElement, + type: string, + quality?: number, +): Promise { + return new Promise((resolve, reject) => { + canvas.toBlob( + (blob) => { + if (blob) resolve(blob); + else reject(new Error(`The browser could not encode ${type}.`)); + }, + type, + quality, + ); + }); +} + +function outputMime(kind: ImageScanResult["identity"]["detectedKind"]): string { + if (kind === "jpeg") return "image/jpeg"; + if (kind === "png") return "image/png"; + if (kind === "webp") return "image/webp"; + throw new TypeError(`No clean-copy encoder is available for ${kind}.`); +} + +function cleanOutputName( + input: string, + kind: ImageScanResult["identity"]["detectedKind"], +): string { + const extension = kind === "jpeg" ? "jpg" : kind; + const withoutExtension = input.replace(/\.[^.]*$/u, "") || "image"; + return sanitizeDownloadFilename(`${withoutExtension}.clean.${extension}`); +} + +function findingSignature(finding: MetadataFinding): string { + const label = finding.label + .toLowerCase() + .replace(/[^a-z0-9]+/gu, " ") + .trim(); + return `${finding.category}\u0000${label}\u0000${finding.value}`; +} + +function normalizeOrientation(value: number | undefined): number { + return value !== undefined && value >= 1 && value <= 8 ? value : 1; +} + +function swapsAxes(orientation: number): boolean { + return orientation >= 5 && orientation <= 8; +} + +function expectedWidth(scan: ImageScanResult): number | undefined { + if (scan.width === undefined || scan.height === undefined) return undefined; + return swapsAxes(normalizeOrientation(scan.orientation)) + ? scan.height + : scan.width; +} + +function expectedHeight(scan: ImageScanResult): number | undefined { + if (scan.width === undefined || scan.height === undefined) return undefined; + return swapsAxes(normalizeOrientation(scan.orientation)) + ? scan.width + : scan.height; +} + +function boundedQuality(value: number): number { + if (!Number.isFinite(value) || value < 0.5 || value > 1) + throw new RangeError("Image quality must be between 0.5 and 1."); + return value; +} + +function throwIfAborted(signal?: AbortSignal): void { + if (signal?.aborted) + throw new DOMException("Operation cancelled", "AbortError"); +} diff --git a/src/privacy/scan-client.ts b/src/privacy/scan-client.ts new file mode 100644 index 0000000..bcd4db2 --- /dev/null +++ b/src/privacy/scan-client.ts @@ -0,0 +1,112 @@ +import { assertBatchFiles } from "./limits"; +import type { ImageScanResult, ScanInput } from "./model"; +import type { ScanWorkerRequest, ScanWorkerResponse } from "../worker/protocol"; + +export interface ScanProgress { + completed: number; + total: number; + currentName: string; +} + +export async function scanFilesInWorker( + files: readonly File[], + onProgress: (progress: ScanProgress) => void = () => undefined, + signal?: AbortSignal, +): Promise { + assertBatchFiles(files); + throwIfAborted(signal); + const worker = new Worker( + new URL("../worker/scan.worker.ts", import.meta.url), + { + type: "module", + name: "privacy-metadata-scanner", + }, + ); + const cancel = () => worker.terminate(); + signal?.addEventListener("abort", cancel, { once: true }); + const results: ImageScanResult[] = []; + try { + for (let index = 0; index < files.length; index += 1) { + const file = files[index]; + if (!file) continue; + throwIfAborted(signal); + onProgress({ + completed: index, + total: files.length, + currentName: file.name, + }); + const bytes = await file.arrayBuffer(); + throwIfAborted(signal); + const requestId = `scan-${index}-${fileId(file, index)}`; + const input: ScanInput = { + id: fileId(file, index), + name: file.name, + claimedType: file.type, + size: file.size, + lastModified: file.lastModified, + bytes, + }; + results.push( + await scanOne( + worker, + { type: "scan-file", requestId, file: input }, + signal, + ), + ); + onProgress({ + completed: index + 1, + total: files.length, + currentName: file.name, + }); + } + return results; + } finally { + worker.terminate(); + signal?.removeEventListener("abort", cancel); + } +} + +function scanOne( + worker: Worker, + request: ScanWorkerRequest, + signal?: AbortSignal, +): Promise { + return new Promise((resolve, reject) => { + const dispose = () => { + worker.removeEventListener("message", handleMessage); + worker.removeEventListener("error", handleError); + signal?.removeEventListener("abort", handleAbort); + }; + const handleMessage = (event: MessageEvent) => { + const response = event.data; + if (response.requestId !== request.requestId) return; + dispose(); + if (response.type === "scanned") resolve(response.result); + else reject(new Error(response.message)); + }; + const handleError = (event: ErrorEvent) => { + dispose(); + reject(new Error(event.message || "Metadata worker failed.")); + }; + const handleAbort = () => { + dispose(); + reject(new DOMException("Scan cancelled", "AbortError")); + }; + worker.addEventListener("message", handleMessage); + worker.addEventListener("error", handleError); + signal?.addEventListener("abort", handleAbort, { once: true }); + worker.postMessage(request, [request.file.bytes]); + }); +} + +function fileId(file: File, index: number): string { + const safe = file.name + .toLowerCase() + .replace(/[^a-z0-9]+/gu, "-") + .replace(/^-|-$/gu, ""); + return `${index + 1}-${safe || "file"}-${file.size}-${file.lastModified}`; +} + +function throwIfAborted(signal?: AbortSignal): void { + if (signal?.aborted) throw new DOMException("Scan cancelled", "AbortError"); +} diff --git a/src/privacy/scanner.ts b/src/privacy/scanner.ts new file mode 100644 index 0000000..8ae7e0d --- /dev/null +++ b/src/privacy/scanner.ts @@ -0,0 +1,151 @@ +import { + digestHex, + sanitizeDownloadFilename, +} from "@add-ideas/toolbox-helpers"; + +import { inventoryIdentity } from "./detect"; +import { scanWithExifReader } from "./exif-reader-adapter"; +import { FindingCollector } from "./findings"; +import { scanJpeg, type FormatScan } from "./jpeg"; +import { assertLimit, resolveLimits } from "./limits"; +import type { ImageScanResult, PrivacyLimits, ScanInput } from "./model"; +import { scanPng } from "./png"; +import { scanWebp } from "./webp"; + +const EMPTY_FORMAT: FormatScan = Object.freeze({ + animated: false, + multiImage: false, + complete: false, + blocks: [], +}); + +export async function scanImageBytes( + input: ScanInput, + overrides: Partial = {}, +): Promise { + const limits = resolveLimits(overrides); + assertLimit(input.size, limits.maxFileBytes, "File size"); + if (input.bytes.byteLength !== input.size) + throw new RangeError( + `Declared file size ${input.size} does not match ${input.bytes.byteLength} bytes read`, + ); + const bytes = new Uint8Array(input.bytes); + const identity = inventoryIdentity(input.name, input.claimedType, bytes); + const collector = new FindingCollector(limits); + let format: FormatScan = EMPTY_FORMAT; + if (identity.detectedKind === "jpeg") + format = scanJpeg(bytes, collector, limits); + else if (identity.detectedKind === "png") + format = scanPng(bytes, collector, limits); + else if (identity.detectedKind === "webp") + format = scanWebp(bytes, collector, limits); + + const deepSupported = ["jpeg", "png", "webp"].includes(identity.detectedKind); + const secondarySupported = [ + "jpeg", + "png", + "webp", + "gif", + "tiff", + "heic", + "avif", + "jxl", + ].includes(identity.detectedKind); + const secondary = secondarySupported + ? scanWithExifReader(input.bytes, collector, limits) + : { + status: "unsupported" as const, + notes: ["No deep metadata adapter is available for this format."], + }; + const width = format.width ?? secondary.width; + const height = format.height ?? secondary.height; + let dimensionsAllowed = true; + if (width !== undefined && height !== undefined) { + if (width <= 0 || height <= 0) { + collector.warn("Image dimensions are invalid."); + dimensionsAllowed = false; + } else if ( + width > limits.maxEdge || + height > limits.maxEdge || + width * height > limits.maxPixels + ) { + collector.warn( + `Image dimensions ${width}×${height} exceed the ${limits.maxEdge}-pixel edge or ${limits.maxPixels.toLocaleString("en-US")}-pixel processing limit.`, + ); + dimensionsAllowed = false; + } + } else if (deepSupported) { + collector.warn( + "Pixel dimensions could not be established from the container.", + ); + dimensionsAllowed = false; + } + if (identity.typeMatch === "mismatch") + collector.warn( + "The filename or browser-claimed media type does not match the detected bytes.", + ); + if (!deepSupported) + collector.warn( + "This format receives inventory and best-effort secondary inspection only; clean-copy output is unavailable.", + ); + if (format.animated) + collector.warn("Animated images are inspect-only in version 0.1."); + if (format.multiImage) + collector.warn("Multi-image containers are inspect-only in version 0.1."); + + const cleanable = + deepSupported && + format.complete && + !collector.limited && + !format.animated && + !format.multiImage && + dimensionsAllowed; + const sha256 = await digestHex(bytes, "SHA-256", limits.maxFileBytes); + return { + id: input.id, + name: input.name, + safeName: sanitizeDownloadFilename(input.name, "image"), + size: input.size, + lastModified: input.lastModified, + sha256, + identity, + width, + height, + orientation: format.orientation, + animated: format.animated, + multiImage: format.multiImage, + deepSupported, + cleanable, + findings: collector.findings.sort(compareFindings), + blocks: format.blocks, + warnings: collector.warnings, + coverage: { + projectScanner: deepSupported + ? format.complete && !collector.limited + ? "complete" + : "partial" + : "unsupported", + secondaryScanner: + collector.limited && secondary.status === "complete" + ? "partial" + : secondary.status, + notes: collector.limited + ? [ + ...secondary.notes, + "Normalized finding output reached its text limit.", + ] + : secondary.notes, + }, + }; +} + +function compareFindings( + left: ImageScanResult["findings"][number], + right: ImageScanResult["findings"][number], +): number { + return ( + left.category.localeCompare(right.category) || + left.source.localeCompare(right.source) || + left.label.localeCompare(right.label) + ); +} diff --git a/src/privacy/tiff.ts b/src/privacy/tiff.ts new file mode 100644 index 0000000..784c98e --- /dev/null +++ b/src/privacy/tiff.ts @@ -0,0 +1,346 @@ +import { categoryForName, FindingCollector } from "./findings"; +import { scanIptc } from "./iptc"; +import type { PrivacyLimits } from "./model"; +import { scanXmp } from "./xmp"; + +const TYPE_BYTES: Readonly> = Object.freeze({ + 1: 1, + 2: 1, + 3: 2, + 4: 4, + 5: 8, + 7: 1, + 9: 4, + 10: 8, + 11: 4, + 12: 8, + 13: 4, +}); + +const TAG_NAMES: Readonly> = Object.freeze({ + 0x010e: "Image Description", + 0x010f: "Camera Make", + 0x0110: "Camera Model", + 0x0112: "Orientation", + 0x0131: "Software", + 0x0132: "Date/Time", + 0x013b: "Artist", + 0x0201: "JPEG Thumbnail Offset", + 0x0202: "JPEG Thumbnail Length", + 0x02bc: "XMP", + 0x8298: "Copyright", + 0x83bb: "IPTC/NAA", + 0x8769: "Exif IFD", + 0x8825: "GPS IFD", + 0x9003: "Date/Time Original", + 0x9004: "Date/Time Digitized", + 0x927c: "Maker Note", + 0x9286: "User Comment", + 0xa005: "Interoperability IFD", + 0xa420: "Image Unique ID", + 0xa430: "Camera Owner Name", + 0xa431: "Camera Body Serial Number", + 0xa432: "Lens Specification", + 0xa433: "Lens Make", + 0xa434: "Lens Model", + 0xa435: "Lens Serial Number", + 0x9c9b: "Windows Title", + 0x9c9c: "Windows Comment", + 0x9c9d: "Windows Author", + 0x9c9e: "Windows Keywords", + 0x9c9f: "Windows Subject", + 0x8773: "ICC Profile", +}); + +const GPS_NAMES: Readonly> = Object.freeze({ + 0: "GPS Version", + 1: "GPS Latitude Reference", + 2: "GPS Latitude", + 3: "GPS Longitude Reference", + 4: "GPS Longitude", + 5: "GPS Altitude Reference", + 6: "GPS Altitude", + 7: "GPS Time Stamp", + 11: "GPS Dilution of Precision", + 12: "GPS Speed Reference", + 13: "GPS Speed", + 16: "GPS Direction Reference", + 17: "GPS Direction", + 18: "GPS Map Datum", + 27: "GPS Processing Method", + 28: "GPS Area Information", + 29: "GPS Date Stamp", + 31: "GPS Horizontal Positioning Error", +}); + +export interface TiffScan { + orientation?: number; + complete: boolean; +} + +interface IfdTask { + offset: number; + role: "main" | "exif" | "gps" | "interop" | "thumbnail"; + depth: number; +} + +export function scanTiff( + bytes: Uint8Array, + source: string, + baseOffset: number, + collector: FindingCollector, + limits: Readonly, +): TiffScan { + if (bytes.byteLength < 8) { + collector.warn(`${source} TIFF data is truncated.`); + return { complete: false }; + } + const littleEndian = bytes[0] === 0x49 && bytes[1] === 0x49; + const bigEndian = bytes[0] === 0x4d && bytes[1] === 0x4d; + if (!littleEndian && !bigEndian) { + collector.warn(`${source} TIFF byte order is invalid.`); + return { complete: false }; + } + const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength); + const u16 = (offset: number) => view.getUint16(offset, littleEndian); + const u32 = (offset: number) => view.getUint32(offset, littleEndian); + if (u16(2) !== 42) { + collector.warn(`${source} TIFF magic is unsupported.`); + return { complete: false }; + } + const tasks: IfdTask[] = [{ offset: u32(4), role: "main", depth: 0 }]; + const visited = new Set(); + let totalEntries = 0; + let orientation: number | undefined; + let complete = true; + + while (tasks.length > 0) { + const task = tasks.pop(); + if (!task) break; + if (task.depth > limits.maxTiffDepth) { + collector.warn( + `${source} TIFF IFD depth exceeded ${limits.maxTiffDepth}.`, + ); + complete = false; + continue; + } + if (task.offset === 0) continue; + if (visited.has(task.offset)) { + collector.warn( + `${source} TIFF IFD cycle was stopped at offset ${task.offset}.`, + ); + complete = false; + continue; + } + visited.add(task.offset); + if (task.offset < 8 || task.offset + 2 > bytes.byteLength) { + collector.warn( + `${source} TIFF IFD offset is outside the metadata block.`, + ); + complete = false; + continue; + } + const count = u16(task.offset); + totalEntries += count; + if (totalEntries > limits.maxTiffEntries) { + collector.warn( + `${source} TIFF entry count exceeded ${limits.maxTiffEntries}.`, + ); + complete = false; + break; + } + const tableEnd = task.offset + 2 + count * 12; + if (tableEnd + 4 > bytes.byteLength) { + collector.warn(`${source} TIFF IFD entry table is truncated.`); + complete = false; + continue; + } + for (let index = 0; index < count; index += 1) { + const entryOffset = task.offset + 2 + index * 12; + const tag = u16(entryOffset); + const type = u16(entryOffset + 2); + const itemCount = u32(entryOffset + 4); + const unit = TYPE_BYTES[type]; + if (!unit) continue; + const byteLength = itemCount * unit; + if ( + !Number.isSafeInteger(byteLength) || + byteLength > limits.maxMetadataBlockBytes + ) { + collector.warn( + `${source} TIFF tag 0x${tag.toString(16)} is oversized.`, + ); + complete = false; + continue; + } + const dataOffset = + byteLength <= 4 ? entryOffset + 8 : u32(entryOffset + 8); + if (dataOffset + byteLength > bytes.byteLength) { + collector.warn( + `${source} TIFF tag 0x${tag.toString(16)} points outside its block.`, + ); + complete = false; + continue; + } + const data = bytes.subarray(dataOffset, dataOffset + byteLength); + const values = readValues( + view, + dataOffset, + itemCount, + type, + littleEndian, + ); + const first = values[0]; + if (tag === 0x8769 || tag === 0x8825 || tag === 0xa005) { + if (typeof first === "number") { + tasks.push({ + offset: first, + role: tag === 0x8825 ? "gps" : tag === 0xa005 ? "interop" : "exif", + depth: task.depth + 1, + }); + } + continue; + } + if (tag === 0x014a) { + for (const value of values) + if (typeof value === "number") + tasks.push({ offset: value, role: "main", depth: task.depth + 1 }); + continue; + } + if (tag === 0x0112 && typeof first === "number") orientation = first; + if (tag === 0x02bc) { + scanXmp(data, `${source} XMP tag`, baseOffset + dataOffset, collector); + continue; + } + if (tag === 0x83bb) { + scanIptc( + data, + `${source} IPTC tag`, + baseOffset + dataOffset, + collector, + ); + continue; + } + const label = + task.role === "gps" + ? (GPS_NAMES[tag] ?? `GPS tag 0x${tag.toString(16)}`) + : TAG_NAMES[tag]; + if (!label) continue; + const classification = + task.role === "gps" + ? ({ category: "location", risk: "sensitive" } as const) + : categoryForName(label); + collector.add({ + ...classification, + source, + label, + value: + tag === 0x0112 && typeof first === "number" + ? orientationName(first) + : displayTiffValue(data, values, type, tag), + offset: baseOffset + dataOffset, + length: byteLength, + }); + } + const next = u32(tableEnd); + if (next !== 0) + tasks.push({ + offset: next, + role: task.role === "main" ? "thumbnail" : task.role, + depth: task.depth + 1, + }); + } + return { orientation, complete }; +} + +function readValues( + view: DataView, + offset: number, + count: number, + type: number, + littleEndian: boolean, +): Array { + if (type === 2) { + const bytes = new Uint8Array(view.buffer, view.byteOffset + offset, count); + return [ + stripTerminalNulls( + new TextDecoder("utf-8", { fatal: false }).decode(bytes), + ), + ]; + } + const result: Array = []; + const maximum = Math.min(count, 128); + for (let index = 0; index < maximum; index += 1) { + const itemOffset = + offset + + index * + (type === 3 + ? 2 + : type === 4 || type === 9 || type === 11 + ? 4 + : type === 5 || type === 10 || type === 12 + ? 8 + : 1); + if (type === 1 || type === 7) result.push(view.getUint8(itemOffset)); + else if (type === 3) result.push(view.getUint16(itemOffset, littleEndian)); + else if (type === 4 || type === 13) + result.push(view.getUint32(itemOffset, littleEndian)); + else if (type === 9) result.push(view.getInt32(itemOffset, littleEndian)); + else if (type === 11) + result.push(view.getFloat32(itemOffset, littleEndian)); + else if (type === 12) + result.push(view.getFloat64(itemOffset, littleEndian)); + else if (type === 5 || type === 10) { + const numerator = + type === 5 + ? view.getUint32(itemOffset, littleEndian) + : view.getInt32(itemOffset, littleEndian); + const denominator = + type === 5 + ? view.getUint32(itemOffset + 4, littleEndian) + : view.getInt32(itemOffset + 4, littleEndian); + result.push( + denominator === 0 ? `${numerator}/0` : numerator / denominator, + ); + } + } + if (count > maximum) result.push(`… ${count - maximum} more values`); + return result; +} + +function displayTiffValue( + data: Uint8Array, + values: Array, + type: number, + tag: number, +): string { + if (type === 2) return String(values[0] ?? ""); + if (tag >= 0x9c9b && tag <= 0x9c9f && data.byteLength % 2 === 0) + return stripTerminalNulls( + new TextDecoder("utf-16le", { fatal: false }).decode(data), + ); + if (tag === 0x927c || tag === 0x8773) return `${data.byteLength} bytes`; + return values.join(", "); +} + +function stripTerminalNulls(value: string): string { + let end = value.length; + while (end > 0 && value.charCodeAt(end - 1) === 0) end -= 1; + return value.slice(0, end); +} + +function orientationName(value: number): string { + return ( + [ + "Unknown", + "1 — normal", + "2 — mirrored horizontally", + "3 — rotated 180°", + "4 — mirrored vertically", + "5 — mirrored then rotated 90° clockwise", + "6 — rotated 90° clockwise", + "7 — mirrored then rotated 90° counter-clockwise", + "8 — rotated 90° counter-clockwise", + ][value] ?? `${value} — invalid orientation` + ); +} diff --git a/src/privacy/webp.ts b/src/privacy/webp.ts new file mode 100644 index 0000000..1bed275 --- /dev/null +++ b/src/privacy/webp.ts @@ -0,0 +1,189 @@ +import { FindingCollector } from "./findings"; +import type { MetadataBlock, PrivacyLimits } from "./model"; +import type { FormatScan } from "./jpeg"; +import { scanTiff } from "./tiff"; +import { scanXmp } from "./xmp"; + +export function scanWebp( + bytes: Uint8Array, + collector: FindingCollector, + limits: Readonly, +): FormatScan { + const blocks: MetadataBlock[] = []; + const declared = readU32le(bytes, 4) + 8; + let complete = declared === bytes.byteLength; + if (declared > bytes.byteLength || declared < 12) { + collector.warn("WebP RIFF size is invalid or truncated."); + complete = false; + } else if (declared < bytes.byteLength) { + const trailing = bytes.byteLength - declared; + blocks.push({ kind: "trailing-data", offset: declared, length: trailing }); + collector.add({ + category: "unknown", + risk: "sensitive", + source: "WebP", + label: "Trailing data", + value: `${trailing} bytes after the declared RIFF container`, + offset: declared, + length: trailing, + }); + } + const containerEnd = Math.min(declared, bytes.byteLength); + let offset = 12; + let chunks = 0; + let width: number | undefined; + let height: number | undefined; + let orientation: number | undefined; + let animated = false; + let sawImageData = false; + while (offset + 8 <= containerEnd) { + const type = ascii(bytes, offset, 4); + const length = readU32le(bytes, offset + 4); + const dataOffset = offset + 8; + const end = dataOffset + length; + if (!/^[\x20-\x7e]{4}$/u.test(type) || end > containerEnd) { + collector.warn(`WebP chunk at byte ${offset} is malformed or truncated.`); + complete = false; + break; + } + chunks += 1; + if (chunks > limits.maxMetadataBlocks) { + collector.warn(`WebP chunk count exceeded ${limits.maxMetadataBlocks}.`); + complete = false; + break; + } + const data = bytes.subarray(dataOffset, end); + if (type === "VP8X" && data.byteLength >= 10) { + animated ||= ((data[0] ?? 0) & 0x02) !== 0; + width = 1 + readU24le(data, 4); + height = 1 + readU24le(data, 7); + } else if (type === "VP8 " && data.byteLength >= 10) { + sawImageData = true; + if (data[3] === 0x9d && data[4] === 0x01 && data[5] === 0x2a) { + width = readU16le(data, 6) & 0x3fff; + height = readU16le(data, 8) & 0x3fff; + } + } else if (type === "VP8L" && data.byteLength >= 5 && data[0] === 0x2f) { + sawImageData = true; + const bits = readU32le(data, 1); + width = 1 + (bits & 0x3fff); + height = 1 + ((bits >>> 14) & 0x3fff); + } else if (type === "ANIM" || type === "ANMF") { + animated = true; + blocks.push({ kind: type, offset: dataOffset, length }); + } else if (["EXIF", "XMP ", "ICCP", "META"].includes(type)) { + if (length > limits.maxMetadataBlockBytes) { + collector.warn(`WebP ${type.trim()} metadata exceeds the block limit.`); + complete = false; + } else { + blocks.push({ kind: type.trim(), offset: dataOffset, length }); + if (type === "EXIF") { + const prefix = ascii(data, 0, 6) === "Exif\u0000\u0000" ? 6 : 0; + const result = scanTiff( + data.subarray(prefix), + "WebP EXIF", + dataOffset + prefix, + collector, + limits, + ); + orientation = result.orientation; + complete &&= result.complete; + } else if (type === "XMP ") { + scanXmp(data, "WebP XMP", dataOffset, collector); + } else if (type === "ICCP") { + collector.add({ + category: "colour-profile", + risk: "technical", + source: "WebP ICCP", + label: "ICC profile", + value: `${length} bytes`, + offset: dataOffset, + length, + }); + } else { + collector.add({ + category: "unknown", + risk: "context", + source: "WebP META", + label: "Generic metadata chunk", + value: `${length} bytes`, + offset: dataOffset, + length, + }); + } + } + } else if (type === "ALPH") { + // Pixel alpha data, not metadata. + } else if (!["VP8X", "VP8 ", "VP8L", "ANIM", "ANMF"].includes(type)) { + const lower = ascii( + data, + 0, + Math.min(data.byteLength, 4096), + ).toLowerCase(); + const provenance = lower.includes("c2pa") || lower.includes("jumb"); + blocks.push({ + kind: type.trim() || "unknown", + offset: dataOffset, + length, + }); + collector.add({ + category: provenance ? "provenance" : "unknown", + risk: "context", + source: "WebP", + label: provenance + ? "Unrecognized provenance chunk" + : `Unrecognized ${type} chunk`, + value: `${length} bytes`, + offset: dataOffset, + length, + }); + } + offset = end + (length % 2); + } + if (offset !== containerEnd) { + collector.warn("WebP chunk padding or RIFF boundary is inconsistent."); + complete = false; + } + if (!sawImageData && !animated) { + collector.warn("WebP pixel data was not found."); + complete = false; + } + return { + width, + height, + orientation, + animated, + multiImage: false, + complete, + blocks, + }; +} + +function ascii(bytes: Uint8Array, offset: number, length: number): string { + if (offset < 0 || offset + length > bytes.byteLength) return ""; + let value = ""; + for (let index = 0; index < length; index += 1) + value += String.fromCharCode(bytes[offset + index] ?? 0); + return value; +} + +function readU16le(bytes: Uint8Array, offset: number): number { + return (bytes[offset] ?? 0) | ((bytes[offset + 1] ?? 0) << 8); +} + +function readU24le(bytes: Uint8Array, offset: number): number { + return ( + (bytes[offset] ?? 0) | + ((bytes[offset + 1] ?? 0) << 8) | + ((bytes[offset + 2] ?? 0) << 16) + ); +} + +function readU32le(bytes: Uint8Array, offset: number): number { + return ( + (bytes[offset] ?? 0) + + (bytes[offset + 1] ?? 0) * 0x100 + + (bytes[offset + 2] ?? 0) * 0x10000 + + (bytes[offset + 3] ?? 0) * 0x1000000 + ); +} diff --git a/src/privacy/xmp.ts b/src/privacy/xmp.ts new file mode 100644 index 0000000..6bd78ee --- /dev/null +++ b/src/privacy/xmp.ts @@ -0,0 +1,94 @@ +import { categoryForName, FindingCollector } from "./findings"; + +const NAMED_VALUES = + /(?:<|\s)([A-Za-z_][\w.-]*:[A-Za-z_][\w.-]*)(?:\s*=\s*["']([^"']*)["']|[^>]*>([^<]{1,65536})<)/gu; + +export function scanXmp( + input: Uint8Array | string, + source: string, + offset: number | undefined, + collector: FindingCollector, +): void { + const raw = typeof input === "string" ? input : decodeMetadataText(input); + if (!raw.trim()) return; + let matched = 0; + for (const match of raw.matchAll(NAMED_VALUES)) { + const name = match[1] ?? "XMP value"; + const value = decodeXmlEntities(match[2] ?? match[3] ?? ""); + if (!value.trim()) continue; + const classification = categoryForName(name); + if ( + classification.category !== "unknown" || + /(?:xmp|rdf|dc|exif|photoshop|tiff):/iu.test(name) + ) { + collector.add({ + ...classification, + source, + label: name, + value, + offset, + length: typeof input === "string" ? input.length : input.byteLength, + }); + matched += 1; + } + } + for (const token of ["c2pa", "jumbf", "provenance", "manifest"]) { + if (raw.toLowerCase().includes(token)) { + collector.add({ + category: "provenance", + risk: "context", + source, + label: "Provenance marker", + value: token.toUpperCase(), + offset, + length: typeof input === "string" ? input.length : input.byteLength, + }); + } + } + collector.add({ + category: matched > 0 ? "technical" : "unknown", + risk: matched > 0 ? "technical" : "context", + source, + label: "Raw XMP packet", + value: raw, + offset, + length: typeof input === "string" ? input.length : input.byteLength, + }); +} + +export function decodeMetadataText(bytes: Uint8Array): string { + if (bytes.byteLength >= 2 && bytes[0] === 0xff && bytes[1] === 0xfe) + return new TextDecoder("utf-16le", { fatal: false }).decode( + bytes.subarray(2), + ); + if (bytes.byteLength >= 2 && bytes[0] === 0xfe && bytes[1] === 0xff) + return new TextDecoder("utf-16be", { fatal: false }).decode( + bytes.subarray(2), + ); + return new TextDecoder("utf-8", { fatal: false }).decode(bytes); +} + +function decodeXmlEntities(value: string): string { + return value.replace( + /&(?:amp|lt|gt|quot|apos|#\d+|#x[\da-f]+);/giu, + (entity) => { + if (entity === "&") return "&"; + if (entity === "<") return "<"; + if (entity === ">") return ">"; + if (entity === """) return '"'; + if (entity === "'") return "'"; + const hex = /^&#x([\da-f]+);$/iu.exec(entity); + const decimal = /^&#(\d+);$/u.exec(entity); + const codePoint = hex + ? Number.parseInt(hex[1] ?? "", 16) + : decimal + ? Number.parseInt(decimal[1] ?? "", 10) + : Number.NaN; + return Number.isInteger(codePoint) && + codePoint >= 0 && + codePoint <= 0x10ffff + ? String.fromCodePoint(codePoint) + : entity; + }, + ); +} diff --git a/src/styles.css b/src/styles.css new file mode 100644 index 0000000..33fa604 --- /dev/null +++ b/src/styles.css @@ -0,0 +1,757 @@ +:root { + --privacy-purple: #5946bc; + --privacy-teal: #147d72; + --privacy-warning: #9a5a08; + --privacy-success: #147057; + --toolbox-background: #f6f7fb; + --toolbox-surface: #ffffff; + --toolbox-surface-soft: #eff1f7; + --toolbox-text: #202332; + --toolbox-muted: #656b7d; + --toolbox-border: #d9dce7; + --toolbox-accent: var(--privacy-purple); + --toolbox-accent-hover: #493caf; + --toolbox-accent-soft: #ece9ff; + --toolbox-accent-contrast: #ffffff; + --toolbox-focus: var(--privacy-teal); + --toolbox-danger: #b42342; +} + +* { + box-sizing: border-box; +} + +html { + min-width: 20rem; + min-height: 100%; + background: var(--toolbox-background); + scrollbar-gutter: stable; +} + +body { + min-width: 20rem; + min-height: 100vh; + margin: 0; + background: var(--toolbox-background); + color: var(--toolbox-text); + font-family: + Inter, + ui-sans-serif, + system-ui, + -apple-system, + BlinkMacSystemFont, + "Segoe UI", + sans-serif; + text-rendering: optimizeLegibility; + -webkit-font-smoothing: antialiased; +} + +#root { + min-height: 100vh; +} + +::selection { + background: color-mix(in srgb, var(--toolbox-focus) 36%, transparent); +} + +.toolbox-shell__main { + width: min(100%, 90rem); + padding: clamp(0.75rem, 1.8vw, 1.5rem); +} + +:where(button, input, select, textarea) { + font: inherit; +} + +:where(button, .button) { + min-height: 2.55rem; + display: inline-flex; + align-items: center; + justify-content: center; + gap: 0.4rem; + padding: 0.55rem 0.8rem; + border: 1px solid var(--toolbox-border); + border-radius: 0.65rem; + background: var(--toolbox-surface); + color: var(--toolbox-text); + font-size: 0.8rem; + font-weight: 720; + line-height: 1.2; + cursor: pointer; + touch-action: manipulation; + transition: + border-color 140ms ease, + background-color 140ms ease, + transform 140ms ease; +} + +button:hover:not(:disabled), +.button:hover { + border-color: var(--toolbox-accent); + background: var(--toolbox-surface-soft); +} + +button:active:not(:disabled) { + transform: translateY(1px); +} + +button:disabled { + cursor: not-allowed; + opacity: 0.48; +} + +:where(button, input, select, textarea, summary, a):focus-visible { + outline: 3px solid color-mix(in srgb, var(--toolbox-focus) 42%, transparent); + outline-offset: 2px; +} + +.primary-button { + border-color: var(--toolbox-accent); + background: var(--toolbox-accent); + color: var(--toolbox-accent-contrast); +} + +.primary-button:hover:not(:disabled) { + background: var(--toolbox-accent-hover); +} + +.sr-only { + position: absolute !important; + width: 1px !important; + height: 1px !important; + padding: 0 !important; + margin: -1px !important; + overflow: hidden !important; + clip: rect(0, 0, 0, 0) !important; + white-space: nowrap !important; + border: 0 !important; +} + +.workbench { + display: grid; + gap: 1rem; +} + +.hero, +.panel, +.boundary-note { + border: 1px solid var(--toolbox-border); + border-radius: 0.9rem; + background: var(--toolbox-surface); + box-shadow: + 0 1px 2px rgb(24 30 60 / 4%), + 0 9px 28px rgb(24 30 60 / 3%); +} + +.hero { + display: flex; + justify-content: space-between; + gap: 1rem; + align-items: flex-start; + padding: clamp(1.1rem, 3vw, 2rem); + background: + radial-gradient( + circle at 88% 20%, + color-mix(in srgb, var(--toolbox-focus) 12%, transparent), + transparent 33% + ), + var(--toolbox-surface); +} + +:where(.hero, .panel, .help-dialog, .fatal) :where(h1, h2, h3) { + margin: 0; + color: var(--toolbox-text); + font-weight: 760; + letter-spacing: -0.025em; + line-height: 1.17; +} + +.hero h1 { + font-size: clamp(1.7rem, 3vw, 2.5rem); +} + +.panel h2, +.help-dialog h2 { + font-size: clamp(1.25rem, 2vw, 1.65rem); +} + +.panel h3, +.help-dialog h3 { + font-size: 1rem; +} + +.hero p:not(.eyebrow) { + max-width: 58rem; + margin: 0.55rem 0 0; + color: var(--toolbox-muted); + line-height: 1.55; +} + +.eyebrow { + margin: 0 0 0.3rem; + color: var(--toolbox-accent); + font-size: 0.69rem; + font-weight: 820; + letter-spacing: 0.115em; + text-transform: uppercase; +} + +.privacy-pill, +.status-badge { + flex: 0 0 auto; + display: inline-flex; + align-items: center; + width: max-content; + padding: 0.38rem 0.62rem; + border: 1px solid color-mix(in srgb, var(--toolbox-accent) 25%, transparent); + border-radius: 999px; + background: var(--toolbox-accent-soft); + color: var(--toolbox-accent); + font-size: 0.7rem; + font-weight: 760; + line-height: 1.15; + text-transform: capitalize; +} + +.panel { + min-width: 0; + padding: clamp(0.85rem, 2vw, 1.15rem); +} + +.panel-heading, +.file-card-heading, +.verification-heading { + display: flex; + justify-content: space-between; + gap: 1rem; + align-items: flex-start; +} + +.panel-heading { + margin-bottom: 0.9rem; +} + +.action-heading { + align-items: flex-end; +} + +.muted { + margin: 0.35rem 0 0; + color: var(--toolbox-muted); + font-size: 0.82rem; + line-height: 1.5; +} + +.limit-note { + color: var(--toolbox-muted); + font-size: 0.72rem; + white-space: nowrap; +} + +.drop-zone { + width: 100%; + min-height: 10rem; + flex-direction: column; + padding: 1.25rem; + border: 1.5px dashed + color-mix(in srgb, var(--toolbox-accent) 45%, var(--toolbox-border)); + background: color-mix( + in srgb, + var(--toolbox-accent-soft) 54%, + var(--toolbox-surface) + ); + text-align: center; +} + +.drop-zone > strong { + font-size: 1rem; +} + +.drop-zone > span:last-child { + max-width: 42rem; + color: var(--toolbox-muted); + font-size: 0.76rem; + font-weight: 520; + line-height: 1.5; +} + +.drop-zone.is-dragging { + border-style: solid; + border-color: var(--toolbox-focus); + background: color-mix( + in srgb, + var(--toolbox-focus) 12%, + var(--toolbox-surface) + ); +} + +.drop-icon { + width: 2.6rem; + height: 2.6rem; + display: grid; + place-items: center; + border-radius: 50%; + background: var(--toolbox-accent); + color: var(--toolbox-accent-contrast) !important; + font-size: 1.2rem !important; +} + +.progress { + display: grid; + gap: 0.4rem; + margin-top: 0.8rem; + color: var(--toolbox-muted); + font-size: 0.75rem; +} + +.progress progress { + width: 100%; + height: 0.55rem; + accent-color: var(--toolbox-accent); +} + +.button-row { + display: flex; + align-items: center; + justify-content: flex-end; + flex-wrap: wrap; + gap: 0.5rem; +} + +.inventory-table-wrap { + overflow: auto; + border: 1px solid var(--toolbox-border); + border-radius: 0.72rem; +} + +.inventory-table { + width: 100%; + min-width: 52rem; + border-collapse: collapse; + font-size: 0.77rem; +} + +.inventory-table :where(th, td) { + padding: 0.65rem 0.72rem; + border-bottom: 1px solid var(--toolbox-border); + text-align: left; + vertical-align: middle; +} + +.inventory-table th { + position: sticky; + z-index: 1; + top: 0; + background: var(--toolbox-surface-soft); + color: var(--toolbox-muted); + font-size: 0.68rem; + letter-spacing: 0.04em; + text-transform: uppercase; +} + +.inventory-table tbody tr:last-child td { + border-bottom: 0; +} + +.inventory-table td { + max-width: 20rem; +} + +.inventory-table td > :where(strong, span, code) { + display: block; + overflow-wrap: anywhere; +} + +.inventory-table td > span:not(.status-badge) { + margin-top: 0.25rem; + color: var(--toolbox-muted); + font-size: 0.68rem; +} + +.inventory-table .status-badge { + margin-top: 0.28rem; +} + +.status-badge.is-mismatch, +.status-badge.is-failed { + border-color: color-mix(in srgb, var(--toolbox-danger) 35%, transparent); + background: color-mix( + in srgb, + var(--toolbox-danger) 10%, + var(--toolbox-surface) + ); + color: var(--toolbox-danger); +} + +.status-badge.is-warning, +.status-badge.is-unknown, +.status-badge.is-unclaimed { + border-color: color-mix(in srgb, var(--privacy-warning) 35%, transparent); + background: color-mix( + in srgb, + var(--privacy-warning) 10%, + var(--toolbox-surface) + ); + color: var(--privacy-warning); +} + +.status-badge.is-verified, +.status-badge.is-match { + border-color: color-mix(in srgb, var(--privacy-success) 35%, transparent); + background: color-mix( + in srgb, + var(--privacy-success) 10%, + var(--toolbox-surface) + ); + color: var(--privacy-success); +} + +.file-results { + display: grid; + gap: 1rem; +} + +.file-card { + display: grid; + gap: 0.85rem; +} + +.file-card-heading { + align-items: center; +} + +.hash-line { + max-width: 70rem; + overflow-wrap: anywhere; +} + +.hash-line code, +.finding-list code, +.verification-grid code { + font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; + font-size: 0.74rem; +} + +.warning-list, +.error-message, +.boundary-note { + margin: 0; + padding: 0.72rem 0.86rem; + border-radius: 0.68rem; + font-size: 0.78rem; + line-height: 1.5; +} + +.warning-list { + padding-left: 2rem; + border: 1px solid + color-mix(in srgb, var(--privacy-warning) 32%, var(--toolbox-border)); + background: color-mix( + in srgb, + var(--privacy-warning) 7%, + var(--toolbox-surface) + ); + color: color-mix(in srgb, var(--privacy-warning) 82%, var(--toolbox-text)); +} + +.error-message { + border: 1px solid + color-mix(in srgb, var(--toolbox-danger) 32%, var(--toolbox-border)); + background: color-mix( + in srgb, + var(--toolbox-danger) 7%, + var(--toolbox-surface) + ); + color: var(--toolbox-danger); +} + +.finding-summary { + display: grid; + gap: 0.45rem; +} + +.finding-summary > p { + margin: 0; + color: var(--toolbox-muted); + font-size: 0.8rem; +} + +.finding-summary details, +.verification details { + overflow: hidden; + border: 1px solid var(--toolbox-border); + border-radius: 0.65rem; + background: var(--toolbox-surface); +} + +.finding-summary summary, +.verification summary { + display: flex; + justify-content: space-between; + gap: 0.7rem; + padding: 0.62rem 0.72rem; + background: var(--toolbox-surface-soft); + font-size: 0.77rem; + font-weight: 730; + cursor: pointer; +} + +.finding-list { + display: grid; +} + +.finding-list > div { + min-width: 0; + display: grid; + grid-template-columns: minmax(9rem, 0.32fr) minmax(0, 1fr); + gap: 0.8rem; + padding: 0.62rem 0.72rem; +} + +.finding-list > div + div { + border-top: 1px solid var(--toolbox-border); +} + +.finding-list > div > div { + display: grid; + align-content: start; + gap: 0.2rem; +} + +.finding-list strong { + font-size: 0.75rem; +} + +.finding-list span { + color: var(--toolbox-muted); + font-size: 0.66rem; +} + +.finding-list code { + overflow: auto; + max-height: 12rem; + padding: 0.45rem; + border-radius: 0.4rem; + background: var(--toolbox-surface-soft); + color: var(--toolbox-text); + overflow-wrap: anywhere; + white-space: pre-wrap; +} + +.finding-list .omitted-findings { + margin: 0; + padding: 0.55rem 0.72rem; + border-top: 1px solid var(--toolbox-border); + color: var(--toolbox-muted); + font-size: 0.72rem; +} + +.verification { + display: grid; + gap: 0.8rem; + padding: 0.9rem; + border: 1px solid + color-mix(in srgb, var(--privacy-success) 30%, var(--toolbox-border)); + border-radius: 0.75rem; + background: color-mix( + in srgb, + var(--privacy-success) 5%, + var(--toolbox-surface) + ); +} + +.verification.is-warning { + border-color: color-mix( + in srgb, + var(--privacy-warning) 35%, + var(--toolbox-border) + ); + background: color-mix( + in srgb, + var(--privacy-warning) 5%, + var(--toolbox-surface) + ); +} + +.verification.is-failed { + border-color: color-mix( + in srgb, + var(--toolbox-danger) 35%, + var(--toolbox-border) + ); + background: color-mix( + in srgb, + var(--toolbox-danger) 5%, + var(--toolbox-surface) + ); +} + +.verification-grid { + display: grid; + grid-template-columns: repeat(4, minmax(0, 1fr)); + gap: 0.65rem; + margin: 0; +} + +.verification-grid > div { + min-width: 0; + padding: 0.62rem; + border: 1px solid var(--toolbox-border); + border-radius: 0.58rem; + background: var(--toolbox-surface); +} + +.verification-grid dt { + color: var(--toolbox-muted); + font-size: 0.67rem; + font-weight: 720; +} + +.verification-grid dd { + margin: 0.3rem 0 0; + overflow-wrap: anywhere; + font-size: 0.75rem; +} + +.verification details ul { + margin: 0; + padding: 0.7rem 0.7rem 0.7rem 2rem; + font-size: 0.76rem; +} + +.disclaimer { + margin: 0; + color: var(--toolbox-muted); + font-size: 0.73rem; + line-height: 1.5; +} + +.boundary-note { + border-color: color-mix( + in srgb, + var(--privacy-warning) 30%, + var(--toolbox-border) + ); + background: color-mix( + in srgb, + var(--privacy-warning) 6%, + var(--toolbox-surface) + ); +} + +.help-dialog { + width: min(48rem, calc(100% - 2rem)); + max-height: calc(100vh - 2rem); + padding: clamp(1rem, 2.5vw, 1.4rem); + overflow: auto; + border: 1px solid var(--toolbox-border); + border-radius: 0.9rem; + background: var(--toolbox-surface); + color: var(--toolbox-text); + box-shadow: 0 24px 80px rgb(10 16 38 / 28%); +} + +.help-dialog::backdrop { + background: rgb(20 24 45 / 55%); + backdrop-filter: blur(2px); +} + +.dialog-heading { + display: flex; + justify-content: space-between; + gap: 1rem; + align-items: flex-start; + margin-bottom: 0.85rem; +} + +.dialog-heading button { + width: 2.55rem; + min-width: 2.55rem; + padding: 0; +} + +.help-sections { + display: grid; + grid-template-columns: repeat(2, minmax(0, 1fr)); + gap: 0.75rem; +} + +.help-sections section { + display: grid; + align-content: start; + gap: 0.45rem; + padding: 0.85rem; + border: 1px solid var(--toolbox-border); + border-radius: 0.68rem; + background: var(--toolbox-surface-soft); +} + +.help-sections p { + margin: 0; + color: var(--toolbox-muted); + font-size: 0.8rem; + line-height: 1.55; +} + +.loading, +.fatal { + width: min(100% - 2rem, 60rem); + margin: 2rem auto; + padding: 1rem; +} + +@media (max-width: 64rem) { + .verification-grid { + grid-template-columns: repeat(2, minmax(0, 1fr)); + } +} + +@media (max-width: 48rem) { + .hero, + .panel-heading, + .file-card-heading, + .verification-heading { + flex-direction: column; + } + + .privacy-pill { + order: -1; + } + + .action-heading { + align-items: stretch; + } + + .button-row { + justify-content: flex-start; + } + + .finding-list > div, + .help-sections { + grid-template-columns: 1fr; + } +} + +@media (max-width: 32rem) { + .toolbox-shell__main { + padding: 0.65rem; + } + + .button-row > button { + width: 100%; + } + + .verification-grid { + grid-template-columns: 1fr; + } +} + +@media (prefers-reduced-motion: reduce) { + *, + *::before, + *::after { + transition-duration: 0.01ms !important; + animation-duration: 0.01ms !important; + animation-iteration-count: 1 !important; + } +} diff --git a/src/test/setup.ts b/src/test/setup.ts new file mode 100644 index 0000000..e257a0e --- /dev/null +++ b/src/test/setup.ts @@ -0,0 +1,8 @@ +import "@testing-library/jest-dom/vitest"; +import { afterEach } from "vitest"; +import { cleanup } from "@testing-library/react"; + +afterEach(() => { + cleanup(); + globalThis.localStorage?.clear(); +}); diff --git a/src/toolbox/manifest.source.json b/src/toolbox/manifest.source.json new file mode 100644 index 0000000..4236046 --- /dev/null +++ b/src/toolbox/manifest.source.json @@ -0,0 +1,41 @@ +{ + "$schema": "https://git.add-ideas.de/lotobo/toolbox-sdk/raw/branch/main/schemas/toolbox-app.v1.schema.json", + "schemaVersion": 1, + "id": "de.add-ideas.privacy-tools", + "name": "Privacy Tools", + "version": "0.1.0", + "description": "Inspect and remove shareable-file metadata locally in the browser.", + "entry": "./", + "icon": "./favicon.svg", + "categories": ["privacy", "files", "security"], + "tags": ["metadata", "exif", "privacy", "sanitize", "share"], + "integration": { + "contextVersion": 1, + "launchModes": ["navigate", "new-tab"], + "embedding": "unsupported" + }, + "requirements": { + "secureContext": true, + "workers": true, + "indexedDb": false, + "crossOriginIsolated": false, + "topLevelContext": false + }, + "privacy": { + "processing": "local", + "fileUploads": true, + "telemetry": false, + "label": "Inputs stay in this browser; nothing is uploaded." + }, + "source": { + "repository": "https://git.add-ideas.de/lotobo/privacy-tools", + "license": "GPL-3.0-or-later" + }, + "actions": [ + { + "id": "source", + "label": "Source", + "url": "https://git.add-ideas.de/lotobo/privacy-tools" + } + ] +} diff --git a/src/toolbox/manifest.ts b/src/toolbox/manifest.ts new file mode 100644 index 0000000..5e788f5 --- /dev/null +++ b/src/toolbox/manifest.ts @@ -0,0 +1,4 @@ +import { defineToolboxApp, parseToolboxApp } from "@add-ideas/toolbox-contract"; +import source from "./manifest.source.json"; + +export const manifest = defineToolboxApp(parseToolboxApp(source)); diff --git a/src/version.ts b/src/version.ts new file mode 100644 index 0000000..76162f8 --- /dev/null +++ b/src/version.ts @@ -0,0 +1 @@ +export const APP_VERSION = "0.1.0"; diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts new file mode 100644 index 0000000..11f02fe --- /dev/null +++ b/src/vite-env.d.ts @@ -0,0 +1 @@ +/// diff --git a/src/worker/protocol.ts b/src/worker/protocol.ts new file mode 100644 index 0000000..4242191 --- /dev/null +++ b/src/worker/protocol.ts @@ -0,0 +1,21 @@ +import type { ImageScanResult, ScanInput } from "../privacy/model"; + +export interface ScanFileRequest { + type: "scan-file"; + requestId: string; + file: ScanInput; +} + +export type ScanWorkerRequest = ScanFileRequest; + +export type ScanWorkerResponse = + | { + type: "scanned"; + requestId: string; + result: ImageScanResult; + } + | { + type: "error"; + requestId: string; + message: string; + }; diff --git a/src/worker/scan.worker.ts b/src/worker/scan.worker.ts new file mode 100644 index 0000000..848bb8f --- /dev/null +++ b/src/worker/scan.worker.ts @@ -0,0 +1,31 @@ +/// + +import { scanImageBytes } from "../privacy/scanner"; +import type { ScanWorkerRequest, ScanWorkerResponse } from "./protocol"; + +const scope = self as DedicatedWorkerGlobalScope; + +scope.addEventListener("message", (event: MessageEvent) => { + if (event.data.type === "scan-file") void scanFile(event.data); +}); + +async function scanFile(request: ScanWorkerRequest): Promise { + try { + post({ + type: "scanned", + requestId: request.requestId, + result: await scanImageBytes(request.file), + }); + } catch (error) { + post({ + type: "error", + requestId: request.requestId, + message: + error instanceof Error ? error.message : "Metadata scanning failed.", + }); + } +} + +function post(message: ScanWorkerResponse): void { + scope.postMessage(message); +} diff --git a/tests/browser/app.spec.ts b/tests/browser/app.spec.ts new file mode 100644 index 0000000..344a14d --- /dev/null +++ b/tests/browser/app.spec.ts @@ -0,0 +1,166 @@ +import { expect, test, type Page } from "@playwright/test"; + +import { pngFixture, tiffFixture } from "../fixtures/images"; + +const ORIGIN = "http://127.0.0.1:4173"; +async function localOnly(page: Page) { + const external: string[] = []; + await page.route("**/*", async (route) => { + const url = new URL(route.request().url()); + if (url.origin !== ORIGIN) { + external.push(url.href); + await route.abort(); + } else await route.continue(); + }); + return external; +} + +test("runs from a nested path without external requests", async ({ page }) => { + const errors: string[] = []; + page.on("pageerror", (error) => errors.push(error.message)); + page.on("console", (message) => { + if (message.type() === "error") errors.push(message.text()); + }); + const external = await localOnly(page); + await page.goto("/deep/nested/privacy/"); + await expect( + page.getByRole("heading", { name: "Privacy Tools" }), + ).toBeVisible(); + expect(external).toEqual([]); + expect(errors).toEqual([]); +}); + +test("serves the release identity and hardened headers", async ({ + request, +}) => { + const index = await request.get("/deep/nested/privacy/"); + expect(index.ok()).toBe(true); + expect(index.headers()["content-security-policy"]).toContain( + "default-src 'self'", + ); + expect(await index.text()).not.toMatch(/\b(?:src|href)=["']\//u); + const manifest = await request.get("/deep/nested/privacy/toolbox-app.json"); + await expect(manifest.json()).resolves.toMatchObject({ + id: "de.add-ideas.privacy-tools", + version: "0.1.0", + entry: "./", + }); +}); + +test("inspects and independently verifies a re-encoded PNG without network access", async ({ + page, +}) => { + const errors: string[] = []; + page.on("pageerror", (error) => errors.push(error.message)); + page.on("console", (message) => { + if (message.type() === "error") errors.push(message.text()); + }); + const external = await localOnly(page); + await page.goto("/deep/nested/privacy/"); + + await page.locator('input[type="file"]').setInputFiles([ + { + name: "metadata-fixture.png", + mimeType: "image/png", + buffer: Buffer.from(pngFixture()), + }, + { + name: "inventory-only.pdf", + mimeType: "application/pdf", + buffer: Buffer.from("%PDF-1.7\n% fixture"), + }, + ]); + await expect( + page.getByRole("heading", { name: "Batch inventory" }), + ).toBeVisible(); + await expect(page.getByText("Alice PNG").first()).toBeVisible(); + await expect(page.getByText("PNG Alice").first()).toBeVisible(); + await expect(page.getByText("inventory-only.pdf").first()).toBeVisible(); + await page.getByRole("button", { name: "Re-encode & verify" }).click(); + await expect(page.getByText("Mandatory output re-scan")).toBeVisible(); + await expect(page.locator(".verification")).not.toHaveClass(/is-failed/u); + await expect( + page.getByRole("button", { name: "Download re-encoded output" }), + ).toBeEnabled(); + + const imageDownload = page.waitForEvent("download"); + await page + .getByRole("button", { name: "Download re-encoded output" }) + .click(); + expect((await imageDownload).suggestedFilename()).toBe( + "metadata-fixture.clean.png", + ); + + const reportDownload = page.waitForEvent("download"); + await page.getByRole("button", { name: "Download JSON report" }).click(); + expect((await reportDownload).suggestedFilename()).toBe( + "privacy-tools-report.json", + ); + const archiveDownload = page.waitForEvent("download"); + await page + .getByRole("button", { name: "Download 1 re-encoded image + report" }) + .click(); + expect((await archiveDownload).suggestedFilename()).toBe( + "privacy-tools-re-encoded-images.zip", + ); + expect(external).toEqual([]); + expect(errors).toEqual([]); +}); + +test("normalizes EXIF orientation while re-encoding JPEG pixels", async ({ + page, +}) => { + const external = await localOnly(page); + await page.goto("/deep/nested/privacy/"); + const encoded = await page.evaluate(async () => { + const canvas = document.createElement("canvas"); + canvas.width = 2; + canvas.height = 1; + const context = canvas.getContext("2d"); + if (!context) throw new Error("Missing test canvas"); + context.fillStyle = "#ff0000"; + context.fillRect(0, 0, 1, 1); + context.fillStyle = "#0000ff"; + context.fillRect(1, 0, 1, 1); + const blob = await new Promise((resolve, reject) => + canvas.toBlob( + (value) => + value ? resolve(value) : reject(new Error("JPEG encode failed")), + "image/jpeg", + 0.95, + ), + ); + return [...new Uint8Array(await blob.arrayBuffer())]; + }); + const jpeg = addExifOrientation(Buffer.from(encoded), 6); + await page.locator('input[type="file"]').setInputFiles({ + name: "oriented.jpg", + mimeType: "image/jpeg", + buffer: jpeg, + }); + await expect(page.getByText("2 × 1 pixels")).toBeVisible(); + await page.getByRole("button", { name: "Re-encode & verify" }).click(); + await expect(page.getByText("Mandatory output re-scan")).toBeVisible(); + await expect(page.locator(".verification")).not.toHaveClass(/is-failed/u); + await expect(page.getByText("Normalized", { exact: true })).toBeVisible(); + expect(external).toEqual([]); +}); + +function addExifOrientation(jpeg: Buffer, orientation: number): Buffer { + const payload = Buffer.concat([ + Buffer.from("Exif\0\0", "binary"), + Buffer.from(tiffFixture({ orientation })), + ]); + const segment = Buffer.from([ + 0xff, + 0xe1, + ((payload.length + 2) >>> 8) & 0xff, + (payload.length + 2) & 0xff, + ]); + return Buffer.concat([ + jpeg.subarray(0, 2), + segment, + payload, + jpeg.subarray(2), + ]); +} diff --git a/tests/components/app.test.tsx b/tests/components/app.test.tsx new file mode 100644 index 0000000..f5b3caf --- /dev/null +++ b/tests/components/app.test.tsx @@ -0,0 +1,18 @@ +import { render, screen } from "@testing-library/react"; +import { describe, expect, it, vi } from "vitest"; +import { App } from "../../src/App"; + +describe("Privacy Tools", () => { + it("renders the local workbench and standard shell", async () => { + vi.stubGlobal( + "fetch", + vi.fn(async () => new Response("Not found", { status: 404 })), + ); + render(); + expect( + await screen.findByRole("heading", { name: "Privacy Tools" }), + ).toBeVisible(); + expect(await screen.findByText("Local & ephemeral")).toBeVisible(); + expect(screen.getAllByText(/No anonymity promise/iu)).not.toHaveLength(0); + }); +}); diff --git a/tests/fixtures/images.ts b/tests/fixtures/images.ts new file mode 100644 index 0000000..6c8aab8 --- /dev/null +++ b/tests/fixtures/images.ts @@ -0,0 +1,253 @@ +import { crc32 } from "@add-ideas/toolbox-helpers"; +import { zlibSync } from "fflate"; + +const encoder = new TextEncoder(); + +export function jpegFixture(options: { trailing?: boolean } = {}): Uint8Array { + const xmp = encoder.encode( + "http://ns.adobe.com/xap/1.0/\0" + + 'Alice Example48.1 NFixture Cameradoc-123', + ); + const jfif = concat( + encoder.encode("JFIF\0"), + bytes(1, 2, 0), + u16be(72), + u16be(72), + bytes(0, 0), + ); + const iptc = concat( + iptcDataset(80, "Alice Reporter"), + iptcDataset(90, "Berlin"), + iptcDataset(120, "Private caption"), + ); + const photoshop = concat( + encoder.encode("Photoshop 3.0\0"), + encoder.encode("8BIM"), + u16be(0x0404), + bytes(0, 0), + u32be(iptc.byteLength), + iptc, + iptc.byteLength % 2 ? bytes(0) : bytes(), + ); + const body = concat( + bytes(0xff, 0xd8), + jpegSegment(0xe0, jfif), + jpegSegment(0xe1, concat(encoder.encode("Exif\0\0"), tiffFixture())), + jpegSegment(0xe1, xmp), + jpegSegment( + 0xe2, + concat( + encoder.encode("ICC_PROFILE\0"), + bytes(1, 1), + encoder.encode("icc"), + ), + ), + jpegSegment(0xeb, encoder.encode("jumb/c2pa test manifest")), + jpegSegment(0xed, photoshop), + jpegSegment(0xfe, encoder.encode("private jpeg comment")), + jpegSegment(0xc0, bytes(8, 0, 2, 0, 3, 1, 1, 0x11, 0)), + bytes(0xff, 0xda, 0xff, 0xd9), + ); + return options.trailing ? concat(body, encoder.encode("hidden")) : body; +} + +export function pngFixture( + options: { + cycleTiff?: boolean; + inflatedCommentBytes?: number; + animated?: boolean; + trailing?: boolean; + } = {}, +): Uint8Array { + const width = 2; + const height = 1; + const ihdr = concat(u32be(width), u32be(height), bytes(8, 6, 0, 0, 0)); + const xmp = encoder.encode( + "XML:com.adobe.xmp\0\0\0\0\0" + + 'PNG AlicePNG Fixture', + ); + const inflated = encoder.encode( + "x".repeat(options.inflatedCommentBytes ?? 32), + ); + const scanline = bytes(0, 255, 0, 0, 255, 0, 0, 255, 255); + const chunks = [ + pngChunk("IHDR", ihdr), + pngChunk("tEXt", encoder.encode("Author\0Alice PNG")), + pngChunk( + "zTXt", + concat(encoder.encode("Comment\0"), bytes(0), zlibSync(inflated)), + ), + pngChunk("iTXt", xmp), + pngChunk("eXIf", tiffFixture({ cycle: options.cycleTiff })), + pngChunk( + "iCCP", + concat( + encoder.encode("fixture profile\0"), + bytes(0), + zlibSync(encoder.encode("ICC profile bytes")), + ), + ), + pngChunk("vpAg", encoder.encode("private ancillary data")), + ...(options.animated ? [pngChunk("acTL", concat(u32be(2), u32be(0)))] : []), + pngChunk("IDAT", zlibSync(scanline)), + pngChunk("IEND", bytes()), + ]; + const image = concat( + bytes(0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a), + ...chunks, + ); + return options.trailing + ? concat(image, encoder.encode("trailing secret")) + : image; +} + +export function webpFixture(options: { animated?: boolean } = {}): Uint8Array { + const vp8x = bytes(options.animated ? 0x02 : 0, 0, 0, 0, 3, 0, 0, 2, 0, 0); + const dimensions = 3 | (2 << 14); + const vp8l = concat(bytes(0x2f), u32le(dimensions)); + const xmp = encoder.encode( + 'WebP Alice13.4 E', + ); + const chunks = concat( + riffChunk("VP8X", vp8x), + riffChunk("VP8L", vp8l), + riffChunk("EXIF", concat(encoder.encode("Exif\0\0"), tiffFixture())), + riffChunk("XMP ", xmp), + riffChunk("ICCP", encoder.encode("ICC profile bytes")), + ...(options.animated ? [riffChunk("ANIM", bytes(0, 0, 0, 0, 0, 0))] : []), + ); + return concat( + encoder.encode("RIFF"), + u32le(chunks.byteLength + 4), + encoder.encode("WEBP"), + chunks, + ); +} + +export function tiffFixture( + options: { cycle?: boolean; orientation?: number } = {}, +): Uint8Array { + const make = encoder.encode("CameraCo\0"); + const date = encoder.encode("2026:09:01 12:34:56\0"); + const gpsDate = encoder.encode("2026:09:01\0"); + const mainOffset = 8; + const mainEntries = 4; + const mainEnd = mainOffset + 2 + mainEntries * 12; + const dataStart = mainEnd + 4; + const makeOffset = dataStart; + const dateOffset = makeOffset + make.byteLength; + const gpsOffset = dateOffset + date.byteLength; + const gpsEntries = 2; + const gpsEnd = gpsOffset + 2 + gpsEntries * 12; + const gpsDateOffset = gpsEnd + 4; + const result = new Uint8Array(gpsDateOffset + gpsDate.byteLength); + const view = new DataView(result.buffer); + result.set(bytes(0x49, 0x49), 0); + view.setUint16(2, 42, true); + view.setUint32(4, mainOffset, true); + view.setUint16(mainOffset, mainEntries, true); + writeIfdEntry(view, mainOffset + 2, 0x010f, 2, make.byteLength, makeOffset); + writeIfdEntry(view, mainOffset + 14, 0x0112, 3, 1, options.orientation ?? 1); + writeIfdEntry(view, mainOffset + 26, 0x0132, 2, date.byteLength, dateOffset); + writeIfdEntry(view, mainOffset + 38, 0x8825, 4, 1, gpsOffset); + view.setUint32(mainEnd, options.cycle ? mainOffset : 0, true); + result.set(make, makeOffset); + result.set(date, dateOffset); + view.setUint16(gpsOffset, gpsEntries, true); + writeIfdEntry(view, gpsOffset + 2, 1, 2, 2, 0x4e); + writeIfdEntry(view, gpsOffset + 14, 29, 2, gpsDate.byteLength, gpsDateOffset); + view.setUint32(gpsEnd, 0, true); + result.set(gpsDate, gpsDateOffset); + return result; +} + +export function malformedPngLengthFixture(): Uint8Array { + const image = pngFixture(); + const malformed = image.slice(); + new DataView(malformed.buffer).setUint32(8, 0xfffffff0, false); + return malformed; +} + +export function toArrayBuffer(value: Uint8Array): ArrayBuffer { + return value.slice().buffer as ArrayBuffer; +} + +function jpegSegment(marker: number, payload: Uint8Array): Uint8Array { + return concat(bytes(0xff, marker), u16be(payload.byteLength + 2), payload); +} + +function iptcDataset(dataset: number, value: string): Uint8Array { + const encoded = encoder.encode(value); + return concat(bytes(0x1c, 2, dataset), u16be(encoded.byteLength), encoded); +} + +function pngChunk(type: string, data: Uint8Array): Uint8Array { + const typeBytes = encoder.encode(type); + const checksumInput = concat(typeBytes, data); + return concat( + u32be(data.byteLength), + checksumInput, + u32be(crc32(checksumInput, 16 * 1024 * 1024)), + ); +} + +function riffChunk(type: string, data: Uint8Array): Uint8Array { + return concat( + encoder.encode(type), + u32le(data.byteLength), + data, + data.byteLength % 2 ? bytes(0) : bytes(), + ); +} + +function writeIfdEntry( + view: DataView, + offset: number, + tag: number, + type: number, + count: number, + value: number, +): void { + view.setUint16(offset, tag, true); + view.setUint16(offset + 2, type, true); + view.setUint32(offset + 4, count, true); + if (type === 3 && count === 1) view.setUint16(offset + 8, value, true); + else view.setUint32(offset + 8, value, true); +} + +function concat(...parts: readonly Uint8Array[]): Uint8Array { + const size = parts.reduce((total, part) => total + part.byteLength, 0); + const result = new Uint8Array(size); + let offset = 0; + for (const part of parts) { + result.set(part, offset); + offset += part.byteLength; + } + return result; +} + +function bytes(...values: readonly number[]): Uint8Array { + return Uint8Array.from(values); +} + +function u16be(value: number): Uint8Array { + return bytes((value >>> 8) & 0xff, value & 0xff); +} + +function u32be(value: number): Uint8Array { + return bytes( + (value >>> 24) & 0xff, + (value >>> 16) & 0xff, + (value >>> 8) & 0xff, + value & 0xff, + ); +} + +function u32le(value: number): Uint8Array { + return bytes( + value & 0xff, + (value >>> 8) & 0xff, + (value >>> 16) & 0xff, + (value >>> 24) & 0xff, + ); +} diff --git a/tests/privacy/detect.test.ts b/tests/privacy/detect.test.ts new file mode 100644 index 0000000..49cd04f --- /dev/null +++ b/tests/privacy/detect.test.ts @@ -0,0 +1,48 @@ +import { describe, expect, it } from "vitest"; + +import { + detectKind, + fileExtension, + inventoryIdentity, +} from "../../src/privacy"; +import { jpegFixture, pngFixture, webpFixture } from "../fixtures/images"; + +describe("file identity", () => { + it("detects supported containers from bytes", () => { + expect(detectKind(jpegFixture())).toBe("jpeg"); + expect(detectKind(pngFixture())).toBe("png"); + expect(detectKind(webpFixture())).toBe("webp"); + expect(detectKind(Uint8Array.from([0x25, 0x50, 0x44, 0x46, 0x2d]))).toBe( + "pdf", + ); + }); + + it("normalizes leaf extensions without trusting paths", () => { + expect(fileExtension("folder\\PHOTO.JPEG")).toBe("jpeg"); + expect(fileExtension(".hidden")).toBe(""); + expect(fileExtension("no-extension")).toBe(""); + }); + + it("reports claimed and extension mismatches", () => { + const identity = inventoryIdentity( + "portrait.jpg", + "image/jpeg", + pngFixture(), + ); + expect(identity).toMatchObject({ + detectedKind: "png", + detectedType: "image/png", + typeMatch: "mismatch", + }); + }); + + it("does not infer an unknown payload from its extension", () => { + const identity = inventoryIdentity( + "claim.png", + "image/png", + Uint8Array.from([1, 2, 3]), + ); + expect(identity.detectedKind).toBe("unknown"); + expect(identity.typeMatch).toBe("unknown"); + }); +}); diff --git a/tests/privacy/limits.test.ts b/tests/privacy/limits.test.ts new file mode 100644 index 0000000..460794b --- /dev/null +++ b/tests/privacy/limits.test.ts @@ -0,0 +1,40 @@ +import { describe, expect, it } from "vitest"; + +import { + assertBatchFiles, + PrivacyLimitError, + resolveLimits, +} from "../../src/privacy"; + +describe("privacy resource limits", () => { + it("rejects too many, oversized and collectively oversized files", () => { + expect(() => + assertBatchFiles([{ size: 1 }, { size: 1 }], { + ...resolveLimits(), + maxFiles: 1, + }), + ).toThrow(PrivacyLimitError); + expect(() => + assertBatchFiles([{ size: 11 }], { + ...resolveLimits(), + maxFileBytes: 10, + }), + ).toThrow(PrivacyLimitError); + expect(() => + assertBatchFiles([{ size: 6 }, { size: 6 }], { + ...resolveLimits(), + maxFileBytes: 10, + maxBatchBytes: 10, + }), + ).toThrow(PrivacyLimitError); + }); + + it("rejects invalid limit overrides", () => { + expect(() => resolveLimits({ maxFiles: 0 })).toThrow( + /positive safe integer/iu, + ); + expect(() => resolveLimits({ maxFileBytes: Number.NaN })).toThrow( + /positive safe integer/iu, + ); + }); +}); diff --git a/tests/privacy/report.test.ts b/tests/privacy/report.test.ts new file mode 100644 index 0000000..2afb959 --- /dev/null +++ b/tests/privacy/report.test.ts @@ -0,0 +1,207 @@ +// @vitest-environment node + +import { unzipSync } from "fflate"; +import { describe, expect, it } from "vitest"; + +import { + buildSanitizationReport, + createBatchArchive, + createBatchReport, + serializeReport, + type ImageScanResult, + type MetadataFinding, +} from "../../src/privacy"; + +const sensitive: MetadataFinding = { + id: "gps-1", + category: "location", + risk: "sensitive", + source: "EXIF", + label: "GPS Latitude", + value: "48.1 N", +}; + +describe("sanitization and batch reports", () => { + it("marks a complete sensitive-free output verified and records removals", () => { + const source = result({ findings: [sensitive] }); + const output = result({ id: "clean", name: "clean.png", findings: [] }); + const report = buildSanitizationReport( + source, + output, + "clean.png", + "image/png", + 20, + comparison(true), + ); + expect(report.status).toBe("verified"); + expect(report.removed).toEqual([sensitive]); + expect(report.preserved).toEqual([]); + expect(report.orientationNormalized).toBe(true); + expect(report.disclaimer).toMatch(/not an anonymity guarantee/iu); + }); + + it("fails a partial or sensitive output re-scan", () => { + const source = result({ findings: [sensitive] }); + const output = result({ + id: "clean", + findings: [sensitive], + coverage: { + projectScanner: "partial", + secondaryScanner: "complete", + notes: [], + }, + }); + const report = buildSanitizationReport( + source, + output, + "clean.png", + "image/png", + 20, + comparison(false), + ); + expect(report.status).toBe("failed"); + expect(report.preserved).toEqual([sensitive]); + expect(report.incomplete).not.toEqual([]); + }); + + it("reports an unknown browser-generated output chunk as a warning", () => { + const source = result(); + const output = result({ + id: "clean", + findings: [ + { + id: "private-1", + category: "unknown", + risk: "context", + source: "PNG", + label: "Private chunk deBG", + value: "16 bytes", + }, + ], + blocks: [{ kind: "deBG", offset: 40, length: 16 }], + }); + const report = buildSanitizationReport( + source, + output, + "clean.png", + "image/png", + 20, + comparison(true), + ); + expect(report.status).toBe("warning"); + expect(report.generated).toHaveLength(1); + expect(report.incomplete.join(" ")).toContain("deBG"); + }); + + it("fails a changed decoded sample for lossless PNG", () => { + const report = buildSanitizationReport( + result(), + result({ id: "clean" }), + "clean.png", + "image/png", + 20, + comparison(false), + ); + expect(report.status).toBe("failed"); + expect(report.incomplete.join(" ")).toMatch(/pixel sample/iu); + }); + + it("produces deterministic, safe JSON and a stored batch ZIP", async () => { + const source = result({ name: "../private.png", findings: [sensitive] }); + const output = result({ id: "clean", name: "private.clean.png" }); + const report = buildSanitizationReport( + source, + output, + "../same.png", + "image/png", + 3, + comparison(true), + ); + const assets = [ + { blob: new Blob([Uint8Array.of(1, 2, 3)]), report }, + { blob: new Blob([Uint8Array.of(4, 5, 6)]), report }, + ]; + const generatedAt = "2026-09-01T00:00:00.000Z"; + const batch = createBatchReport([source], assets, generatedAt); + const json = serializeReport(batch); + expect(JSON.parse(json)).toMatchObject({ schemaVersion: 1, generatedAt }); + expect(json).toContain("report may itself contain sensitive"); + + const archive = await createBatchArchive([source], assets, generatedAt); + const entries = unzipSync(new Uint8Array(await archive.arrayBuffer())); + expect(Object.keys(entries).sort()).toEqual([ + "images/_same-2.png", + "images/_same.png", + "privacy-tools-report.json", + ]); + expect( + JSON.parse( + new TextDecoder().decode(entries["privacy-tools-report.json"]), + ), + ).toMatchObject({ schemaVersion: 1, generatedAt }); + }); + + it("bounds archive entry count before reading output blobs", async () => { + const source = result(); + const output = result({ id: "clean" }); + const report = buildSanitizationReport( + source, + output, + "clean.png", + "image/png", + 1, + comparison(true), + ); + const asset = { blob: new Blob([Uint8Array.of(0)]), report }; + await expect( + createBatchArchive( + [source], + Array.from({ length: 101 }, () => asset), + ), + ).rejects.toThrow(/Archive image count/iu); + }); +}); + +function comparison(identical: boolean) { + return { + method: "oriented-256px-sample" as const, + sourceDigest: "source-sample", + outputDigest: identical ? "source-sample" : "output-sample", + identical, + note: "test comparison", + }; +} + +function result(overrides: Partial = {}): ImageScanResult { + return { + id: "source", + name: "source.png", + safeName: "source.png", + size: 100, + lastModified: 0, + sha256: "a".repeat(64), + identity: { + claimedType: "image/png", + extension: "png", + detectedKind: "png", + detectedType: "image/png", + typeMatch: "match", + }, + width: 2, + height: 1, + orientation: 1, + animated: false, + multiImage: false, + deepSupported: true, + cleanable: true, + findings: [], + blocks: [], + warnings: [], + coverage: { + projectScanner: "complete", + secondaryScanner: "complete", + notes: [], + }, + ...overrides, + }; +} diff --git a/tests/privacy/scanner.test.ts b/tests/privacy/scanner.test.ts new file mode 100644 index 0000000..ae5d86a --- /dev/null +++ b/tests/privacy/scanner.test.ts @@ -0,0 +1,236 @@ +import { describe, expect, it } from "vitest"; + +import { PrivacyLimitError, scanImageBytes } from "../../src/privacy"; +import { + jpegFixture, + malformedPngLengthFixture, + pngFixture, + toArrayBuffer, + webpFixture, +} from "../fixtures/images"; + +describe("bounded image metadata scanner", () => { + it("extracts JPEG EXIF, IPTC, XMP, JFIF, ICC and provenance", async () => { + const result = await scan("camera.jpg", "image/jpeg", jpegFixture()); + + expect(result).toMatchObject({ + width: 3, + height: 2, + orientation: 1, + animated: false, + multiImage: false, + deepSupported: true, + cleanable: true, + }); + expect(result.coverage.projectScanner).toBe("complete"); + expect(result.findings).toEqual( + expect.arrayContaining([ + expect.objectContaining({ category: "location" }), + expect.objectContaining({ category: "identity" }), + expect.objectContaining({ category: "timestamp" }), + expect.objectContaining({ category: "device" }), + expect.objectContaining({ category: "colour-profile" }), + expect.objectContaining({ category: "provenance" }), + ]), + ); + expect(result.blocks.map((block) => block.kind)).toEqual( + expect.arrayContaining(["APP0", "APP1", "APP2", "APP11", "APP13", "COM"]), + ); + }); + + it("extracts PNG text, compressed text, EXIF, XMP, ICC and private chunks", async () => { + const result = await scan("fixture.png", "image/png", pngFixture()); + + expect(result).toMatchObject({ + width: 2, + height: 1, + orientation: 1, + cleanable: true, + }); + expect(result.coverage.projectScanner).toBe("complete"); + expect( + result.findings.some((finding) => finding.value.includes("Alice PNG")), + ).toBe(true); + expect( + result.findings.some((finding) => finding.value.includes("PNG Alice")), + ).toBe(true); + expect(result.blocks.map((block) => block.kind)).toEqual( + expect.arrayContaining(["tEXt", "zTXt", "iTXt", "eXIf", "iCCP", "vpAg"]), + ); + }); + + it("extracts WebP EXIF, XMP, ICC and extended dimensions", async () => { + const result = await scan("fixture.webp", "image/webp", webpFixture()); + + expect(result).toMatchObject({ + width: 4, + height: 3, + orientation: 1, + animated: false, + cleanable: true, + }); + expect(result.coverage.projectScanner).toBe("complete"); + expect(result.findings).toEqual( + expect.arrayContaining([ + expect.objectContaining({ category: "location" }), + expect.objectContaining({ category: "identity" }), + expect.objectContaining({ category: "colour-profile" }), + ]), + ); + }); + + it("makes animated images inspect-only", async () => { + const png = await scan( + "animated.png", + "image/png", + pngFixture({ animated: true }), + ); + const webp = await scan( + "animated.webp", + "image/webp", + webpFixture({ animated: true }), + ); + expect(png.animated).toBe(true); + expect(webp.animated).toBe(true); + expect(png.cleanable).toBe(false); + expect(webp.cleanable).toBe(false); + }); + + it("reports trailing data rather than hiding it", async () => { + const jpeg = await scan( + "tail.jpg", + "image/jpeg", + jpegFixture({ trailing: true }), + ); + const png = await scan( + "tail.png", + "image/png", + pngFixture({ trailing: true }), + ); + expect( + jpeg.findings.some((finding) => finding.label === "Trailing data"), + ).toBe(true); + expect( + png.findings.some((finding) => finding.label === "Trailing data"), + ).toBe(true); + }); + + it("stops malformed chunks and TIFF cycles and refuses clean-copy eligibility", async () => { + const malformed = await scan( + "malformed.png", + "image/png", + malformedPngLengthFixture(), + ); + const cyclic = await scan( + "cycle.png", + "image/png", + pngFixture({ cycleTiff: true }), + ); + expect(malformed.coverage.projectScanner).toBe("partial"); + expect(malformed.cleanable).toBe(false); + expect(cyclic.coverage.projectScanner).toBe("partial"); + expect(cyclic.warnings.join(" ")).toMatch(/cycle/iu); + expect(cyclic.cleanable).toBe(false); + }); + + it("bounds compressed metadata and finding values", async () => { + const image = pngFixture({ inflatedCommentBytes: 1024 }); + const result = await scanImageBytes(input("bomb.png", "image/png", image), { + maxInflatedMetadataBytes: 32, + maxFindingValueChars: 24, + }); + expect(result.coverage.projectScanner).toBe("partial"); + expect(result.warnings.join(" ")).toMatch(/limit|fully read/iu); + expect(result.findings.every((finding) => finding.value.length <= 25)).toBe( + true, + ); + }); + + it("bounds chunk counts and decoded dimensions", async () => { + const image = pngFixture(); + const tooManyChunks = await scanImageBytes( + input("chunks.png", "image/png", image), + { maxMetadataBlocks: 3 }, + ); + const tooManyPixels = await scanImageBytes( + input("pixels.png", "image/png", image), + { maxPixels: 1 }, + ); + expect(tooManyChunks.coverage.projectScanner).toBe("partial"); + expect(tooManyChunks.cleanable).toBe(false); + expect(tooManyPixels.cleanable).toBe(false); + expect(tooManyPixels.warnings.join(" ")).toMatch(/processing limit/iu); + }); + + it("bounds aggregate normalized finding text", async () => { + const image = pngFixture(); + const result = await scanImageBytes(input("text.png", "image/png", image), { + maxFindingTextChars: 100, + }); + expect(result.coverage.projectScanner).toBe("partial"); + expect(result.coverage.notes.join(" ")).toMatch(/text limit/iu); + expect(result.cleanable).toBe(false); + }); + + it("treats invalid PNG CRCs as partial coverage", async () => { + const image = pngFixture().slice(); + image[image.length - 1] = (image[image.length - 1] ?? 0) ^ 0xff; + const result = await scan("crc.png", "image/png", image); + expect(result.coverage.projectScanner).toBe("partial"); + expect(result.warnings.join(" ")).toMatch(/invalid CRC/iu); + expect(result.cleanable).toBe(false); + }); + + it("contains malformed HEIF-family input in the secondary adapter", async () => { + const malformedHeic = Uint8Array.from([ + 0, 0, 0, 16, 0x66, 0x74, 0x79, 0x70, 0x68, 0x65, 0x69, 0x63, 0, 0, 0, 0, + ]); + const result = await scan("broken.heic", "image/heic", malformedHeic); + expect(result.identity.detectedKind).toBe("heic"); + expect(["failed", "unsupported", "partial"]).toContain( + result.coverage.secondaryScanner, + ); + expect(result.cleanable).toBe(false); + }); + + it("rejects dishonest declared sizes and file limits before parsing", async () => { + const image = pngFixture(); + await expect( + scanImageBytes({ + ...input("wrong.png", "image/png", image), + size: image.length + 1, + }), + ).rejects.toThrow(/does not match/iu); + await expect( + scanImageBytes(input("large.png", "image/png", image), { + maxFileBytes: image.length - 1, + }), + ).rejects.toBeInstanceOf(PrivacyLimitError); + }); + + it("keeps non-image formats at inventory-only coverage", async () => { + const pdf = Uint8Array.from([ + 0x25, 0x50, 0x44, 0x46, 0x2d, 0x31, 0x2e, 0x37, + ]); + const result = await scan("document.pdf", "application/pdf", pdf); + expect(result.identity.detectedKind).toBe("pdf"); + expect(result.deepSupported).toBe(false); + expect(result.cleanable).toBe(false); + expect(result.coverage.projectScanner).toBe("unsupported"); + }); +}); + +async function scan(name: string, type: string, bytes: Uint8Array) { + return scanImageBytes(input(name, type, bytes)); +} + +function input(name: string, type: string, bytes: Uint8Array) { + return { + id: `fixture-${name}`, + name, + claimedType: type, + size: bytes.byteLength, + lastModified: 0, + bytes: toArrayBuffer(bytes), + }; +} diff --git a/tsconfig.app.json b/tsconfig.app.json new file mode 100644 index 0000000..0a14c25 --- /dev/null +++ b/tsconfig.app.json @@ -0,0 +1,27 @@ +{ + "compilerOptions": { + "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo", + "target": "ES2023", + "lib": ["ES2023", "DOM", "DOM.Iterable"], + "module": "ESNext", + "types": ["vite/client"], + "allowArbitraryExtensions": true, + "skipLibCheck": true, + "moduleResolution": "Bundler", + "allowImportingTsExtensions": true, + "verbatimModuleSyntax": true, + "moduleDetection": "force", + "noEmit": true, + "jsx": "react-jsx", + "noUnusedLocals": true, + "noUnusedParameters": true, + "erasableSyntaxOnly": true, + "noFallthroughCasesInSwitch": true, + "strict": true, + "noUncheckedIndexedAccess": true, + "useDefineForClassFields": true, + "resolveJsonModule": true, + "isolatedModules": true + }, + "include": ["src", "tests"] +} diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..ea9d0cd --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,11 @@ +{ + "files": [], + "references": [ + { + "path": "./tsconfig.app.json" + }, + { + "path": "./tsconfig.node.json" + } + ] +} diff --git a/tsconfig.node.json b/tsconfig.node.json new file mode 100644 index 0000000..df3e8ce --- /dev/null +++ b/tsconfig.node.json @@ -0,0 +1,24 @@ +{ + "compilerOptions": { + "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo", + "target": "ES2023", + "lib": ["ES2023"], + "module": "ESNext", + "types": ["node"], + "skipLibCheck": true, + "moduleResolution": "Bundler", + "allowImportingTsExtensions": true, + "verbatimModuleSyntax": true, + "moduleDetection": "force", + "noEmit": true, + "strict": true, + "noUnusedLocals": true, + "noUnusedParameters": true + }, + "include": [ + "vite.config.ts", + "playwright.config.ts", + "eslint.config.mjs", + "scripts/**/*.mjs" + ] +} diff --git a/vite.config.ts b/vite.config.ts new file mode 100644 index 0000000..af3c56b --- /dev/null +++ b/vite.config.ts @@ -0,0 +1,16 @@ +/// +import { defineConfig } from "vite"; +import react from "@vitejs/plugin-react"; + +export default defineConfig({ + base: "./", + plugins: [react()], + test: { + environment: "jsdom", + setupFiles: "./src/test/setup.ts", + css: true, + maxWorkers: 2, + restoreMocks: true, + exclude: ["tests/browser/**", "node_modules/**", "dist/**"], + }, +});