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CIRCL

GitHub release CIRCL GoDoc Go Report Card codecov

CIRCL (Cloudflare Interoperable, Reusable Cryptographic Library) is a collection of cryptographic primitives written in Go. The goal of this library is to be used as a tool for experimental deployment of cryptographic algorithms targeting Post-Quantum (PQ) and Elliptic Curve Cryptography (ECC).

Security Disclaimer

🚨 This library is offered as-is, and without a guarantee. Therefore, it is expected that changes in the code, repository, and API occur in the future. We recommend to take caution before using this library in a production application since part of its content is experimental. All security issues must be reported, please notify us immediately following the instructions given in our Security Policy.

Installation

You can get CIRCL by fetching:

go get -u github.com/cloudflare/circl

List of Algorithms

Diffie-Hellman Protocol

Digital Signature Schemes

Groups based on Elliptic Curves

High-Level Protocols

  • Bilinear pairings with BLS12-381.
  • HPKE: Hybrid Public-Key Encryption
  • VOPRF: Verifiable Oblivious Pseudorandom function.

Post-Quantum Key Encapsulation Methods

  • SIDH/SIKE: Supersingular Key Encapsulation with rimes p434, p503, p751
  • CSIDH: Post-Quantum Commutative Group Action
  • Kyber KEM: modes 512, 768, 1024

Post-Quantum Public-Key Encryption

  • Kyber PKE: modes 512, 768, 1024

Post-Quantum Digital Signature Schemes

Field Arithmetic

  • Fp25519, Fp448, Fp381

Elliptic Curves

Parallel SIMD

XOF: eXtendable Output Functions

Testing and Benchmarking

Library comes with number of make targets which can be used for testing and benchmarking:

  • test performs testing of the binary.
  • bench runs benchmarks.
  • cover produces coverage.
  • lint runs set of linters on the code base.

Contributing

To contribute, fork this repository and make your changes, and then make a Pull Request. A Pull Request requires approval of the admin team and a successful CI build.

How to Cite

To cite CIRCL, use one of the following formats and update the version and date you accessed this project.

APA Style

Faz-Hernández, A. and Kwiatkowski, K. (2019). Introducing CIRCL:
An Advanced Cryptographic Library. Cloudflare. Available at
https://github.com/cloudflare/circl. v1.1.0 Accessed Oct 2021.

Bibtex Source

@manual{circl,
  title        = {Introducing CIRCL: An Advanced Cryptographic Library},
  author       = {Armando Faz-Hern\'{a}ndez and Kris Kwiatkowski},
  organization = {Cloudflare},
  abstract     = {{CIRCL (Cloudflare Interoperable, Reusable Cryptographic Library) is
                   a collection of cryptographic primitives written in Go. The goal
                   of this library is to be used as a tool for experimental
                   deployment of cryptographic algorithms targeting Post-Quantum (PQ)
                   and Elliptic Curve Cryptography (ECC).}},
  note         = {Available at \url{https://github.com/cloudflare/circl}. v1.1.0 Accessed Oct 2021},
  month        = jun,
  year         = {2019}
}

License

The project is licensed under the BSD-3-Clause License.