NOTICE

cchef
Copyright 2026 Michael Roberson

This product includes software developed for CyberChef
(https://github.com/gchq/CyberChef), Copyright Crown Copyright, licensed under
the Apache License, Version 2.0.

cchef is an independent reimplementation of CyberChef in Go. Its operation
semantics, argument definitions, output formats and test vectors are derived
from that project.

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The following third-party material is included in this repository:

1. Bitmap font atlases — ops/bmfonts/

   Taken unmodified from CyberChef, which generated them from the Roboto
   typeface by Christian Robertson (https://github.com/googlefonts/roboto).
   Licensed under the Apache License, Version 2.0. Used so that text rendered
   by the "Add Text To Image" operation is pixel-identical to CyberChef's.

2. x86-64 opcode tables — ops/x86tables/

   Extracted from CyberChef's vendored X86-64-Disassembler-JS by Damian
   Recoskie (https://github.com/Recoskie/X86-64-Disassembler-JS), Copyright
   (c) 2019 Damian Recoskie, licensed under the MIT License. The full license
   text is in ops/x86tables/LICENSE.

3. WHATWG named character reference set — tools/htmlentgen/entity.json

   Retrieved verbatim from https://html.spec.whatwg.org/entities.json.
   Copyright (C) WHATWG (Apple, Google, Mozilla, Microsoft). Licensed under a
   Creative Commons Attribution 4.0 International License; to the extent
   portions are incorporated into source code, those portions are licensed
   under the BSD 3-Clause License. See tools/htmlentgen/entity.txt.

4. UTM coordinate conversion — internal/geocoord/utm.go

   Ported from the utm Python package by Tobias Bieniek
   (https://github.com/Turbo87/utm), Copyright (c) 2012-2017 Tobias Bieniek,
   licensed under the MIT License.

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Portions of this repository are Go ports or transcriptions of third-party
libraries (in most cases the library CyberChef itself uses for the same
operation, so that output matches). The original copyrights and licenses of
those works are acknowledged below:

5. zlib — internal/deflateraw/

   The raw-deflate compressor is a transcription of deflate.c and trees.c
   from zlib (https://zlib.net), Copyright (C) 1995-2024 Jean-loup Gailly and
   Mark Adler, licensed under the zlib License.

6. esprima, escodegen and estraverse — internal/jsparse/, internal/jsbeautify/

   The JavaScript parser, code generator and comment-attachment logic are
   transliterations of esprima (https://esprima.org), escodegen and
   estraverse (https://github.com/estools), Copyright their contributors,
   licensed under the BSD 2-Clause License.

7. jsdiff — ops/diff.go

   The diff engine is a port of the jsdiff package
   (https://github.com/kpdecker/jsdiff), Copyright (c) Kevin Decker,
   licensed under the BSD 3-Clause License.

8. Jimp — internal/jimp/

   The image resize, blur, crop, blit, contain/cover and pixel-transform
   primitives are ports of the Jimp library and its plugins
   (https://github.com/jimp-dev/jimp), Copyright (c) its contributors,
   licensed under the MIT License.

9. vkbeautify — ops/vkbeautify.go and the CSS/XML/SQL/JSON minifiers

   Ported from vkBeautify (https://github.com/vkiryukhin/vkBeautify),
   Copyright (c) 2012 Vadim Kiryukhin, licensed under the MIT License.

10. sql-formatter — ops/sqlbeautify.go

    The SQL layout engine is a port of sql-formatter
    (https://github.com/sql-formatter-org/sql-formatter), Copyright (c) its
    contributors, licensed under the MIT License.

11. jsQR — internal/qr/ (reader and decoder)

    The QR reader is a port of jsQR (https://github.com/cozmo/jsQR),
    Copyright (c) 2016 Cosmo Wolfe, licensed under the Apache License,
    Version 2.0.

12. qr-image — internal/qr/ (matrix generation and renderers)

    The QR generator is a port of qr-image
    (https://github.com/alexeyten/qr-image), Copyright (c) its contributors,
    licensed under the MIT License.

13. crypto-api — internal/snefru/, ops/sm3.go

    The Snefru and SM3 hashes are ports of crypto-api
    (https://github.com/nf404/crypto-api), Copyright (c) its contributors,
    licensed under the MIT License.

14. node-md6 — ops/md6core.go

    The MD6 implementation is derived from node-md6 by Amrit Panesar
    (https://github.com/Neo-Desktop/node-md6), dedicated to the public domain
    under CC0 1.0.

15. exif-parser — internal/exif/

    The EXIF parser is a port of exif-parser by Bruno Windels
    (https://github.com/bwindels/exif-parser), licensed under the MIT
    License.

16. otpauth — ops/otpsecret.go

    The one-time-password machinery is ported from otpauth
    (https://github.com/hectorm/otpauth), Copyright (c) its contributors,
    licensed under the MIT License.

17. bcrypt.js — ops/bcrypt.go

    The bcrypt implementation follows bcrypt.js
    (https://github.com/dcodeIO/bcrypt.js), Copyright (c) its contributors,
    licensed under the BSD 3-Clause License.

18. ssdeep.js and ctph.js — ops/ssdeep.go, ops/ctph.go, ops/fuzzyhash.go

    The fuzzy hashes are ports of ssdeep.js (Copyright (c) ThreatPinch) and
    ctph.js (Copyright (c) 2015 Hu Wenshuo), both licensed under the MIT
    License; the shared Levenshtein routine follows fast-levenshtein
    (Copyright (c) Ramesh Nair), licensed under the MIT License.

19. bignumber.js — ops/bignum.go

    The arbitrary-precision decimal subset follows bignumber.js
    (https://github.com/MikeMcl/bignumber.js), Copyright (c) Michael
    Mclaughlin, licensed under the MIT License.

20. lodash — internal/lodashcase/

    The case-conversion word splitter is a port of lodash
    (https://lodash.com), Copyright OpenJS Foundation and contributors,
    licensed under the MIT License.

21. rison — ops/rison.go

    The Rison codec is a port of the rison npm package
    (https://github.com/Nanonid/rison), Copyright (c) its contributors, as
    licensed in that package (Apache-2.0 per its metadata; the format
    originates with Tim McCormack's rison, MIT).

22. notepack.io — ops/messagepack.go

    The MessagePack codec follows notepack.io
    (https://github.com/darrachequesne/notepack), Copyright (c) its
    contributors, licensed under the MIT License.

23. geodesy — internal/geocoord/coordinates.go

    The OSGB National Grid conversion (Redfearn series and Helmert
    transformation) is ported from the geodesy library
    (https://github.com/chrisveness/geodesy), Copyright (c) Chris Veness,
    licensed under the MIT License.