https://github.com/jedisct1/charm

A really tiny crypto library.
https://github.com/jedisct1/charm

charm crypto cryptography permutation-based tiny xoodoo

Last synced: 10 months ago
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A really tiny crypto library.

• Host: GitHub
• URL: https://github.com/jedisct1/charm
• Owner: jedisct1
• License: mit
• Created: 2019-07-16T10:53:47.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2025-04-29T21:30:32.000Z (11 months ago)
• Last Synced: 2025-05-09T00:05:12.573Z (10 months ago)
• Topics: charm, crypto, cryptography, permutation-based, tiny, xoodoo
• Language: C
• Homepage:
• Size: 28.3 KB
• Stars: 157
• Watchers: 6
• Forks: 13
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# charm

A tiny, self-contained cryptography library, implementing authenticated

encryption and keyed hashing.

Charm uses the Xoodoo[12]([paper](https://tosc.iacr.org/index.php/ToSC/article/view/7359/6529),

[presentation](https://permutationbasedcrypto.org/2018/slides/Gilles_Van_Assche.pdf))

permutation (which can be replaced by AES-based [simpira384](https://github.com/jedisct1/simpira384)

or Gimli) in a duplex mode.

The Xoodoo implementations in Charm are [formally verified](https://github.com/jedisct1/charm/tree/master/verify) against a Cryptol specification.

Users:

- [dsvpn](https://github.com/jedisct1/dsvpn) a Dead Simple VPN, designed to address the most common use case for using a VPN.

Other implementations:

- [zig-charm](https://github.com/jedisct1/zig-charm) an implementation of Charm in the Zig language.

- [charm.js](https://github.com/jedisct1/charm.js) a JavaScript (TypeScript) implementation.

- [go-charm](https://github.com/x13a/go-charm) a Go implementation.