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https://github.com/openmls/openmls

Rust implementation of the Messaging Layer Security (MLS) protocol
https://github.com/openmls/openmls

mls openmls rust security

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Rust implementation of the Messaging Layer Security (MLS) protocol

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README 

        
# OpenMLS



[![OpenMLS Chat][chat-image]][chat-link]

[![OpenMLS List][list-image]][list-link]



[![Tests & Checks][gh-tests-image]](https://github.com/openmls/openmls/actions/workflows/tests.yml?branch=main)



[![codecov][codecov-image]](https://codecov.io/gh/openmls/openmls)



[![Docs][docs-release-badge]][docs-release-link]

[![Book][book-release-badge]][book-release-link]

![Rust Version][rustc-image]



*OpenMLS* is a Rust implementation of the Messaging Layer Security (MLS) protocol, as specified in [RFC 9420](https://datatracker.ietf.org/doc/html/rfc9420).



It is a software library that can serve as a building block in applications that require end-to-end encryption of messages.

It has a safe and easy-to-use interface that hides the complexity of the underlying cryptographic operations.



## Supported ciphersuites



- MLS_128_HPKEX25519_AES128GCM_SHA256_Ed25519 (MTI)

- MLS_128_DHKEMP256_AES128GCM_SHA256_P256

- MLS_128_HPKEX25519_CHACHA20POLY1305_SHA256_Ed25519



## Supported platforms



OpenMLS is built and tested on the Github CI for the following rust targets.



- x86_64-unknown-linux-gnu

- i686-unknown-linux-gnu

- x86_64-pc-windows-msvc

- i686-pc-windows-msvc

- x86_64-apple-darwin



### Unsupported, but built on CI



The Github CI also builds (but doesn't test) the following rust targets.



- aarch64-apple-darwin

- aarch64-unknown-linux-gnu

- aarch64-linux-android

- aarch64-apple-ios

- aarch64-apple-ios-sim

- wasm32-unknown-unknown

- armv7-linux-androideabi

- x86_64-linux-android

- i686-linux-android



OpenMLS supports 32 bit platforms and above.



## Cryptography Dependencies



OpenMLS does not implement its own cryptographic primitives. Instead, it relies

on existing implementations of the cryptographic primitives used by MLS. There

are two different cryptography providers implemented right now. But consumers

can bring their own implementation. See [traits](https://github.com/openmls/openmls/tree/main/traits) for more

details.



## Working on OpenMLS

For more details when working on OpenMLS itself please see the [Developer.md].



## Maintenance & Support

OpenMLS is maintained and developed by [Phoenix R&D] and [Cryspen].



## Acknowledgements



[Zulip] graciously provides the OpenMLS community with a "Zulip Cloud Standard" tier [Zulip instance][chat-link].



[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg?style=for-the-badge&logo=zulip

[chat-link]: https://openmls.zulipchat.com

[list-image]: https://img.shields.io/badge/mailing-list-blue.svg?style=for-the-badge

[list-link]: https://groups.google.com/u/0/g/openmls-dev

[rustc-image]: https://img.shields.io/badge/rustc-1.56+-blue.svg?style=for-the-badge&logo=rust

[docs-release-badge]: https://img.shields.io/badge/docs-release-blue.svg?style=for-the-badge

[docs-release-link]: https://docs.rs/crate/openmls/latest

[book-release-badge]: https://img.shields.io/badge/book-release-blue.svg?style=for-the-badge

[book-release-link]: https://openmls.tech/book

[drone-image]: https://img.shields.io/drone/build/openmls/openmls/main?label=ARM64%20Build%20Status&logo=drone&style=for-the-badge

[codecov-image]: https://img.shields.io/codecov/c/github/openmls/openmls/main?logo=codecov&style=for-the-badge

[gh-tests-image]: https://img.shields.io/github/actions/workflow/status/openmls/openmls/tests.yml?branch=main&style=for-the-badge&logo=github

[gh-deploy-docs-image]: https://img.shields.io/github/workflow/status/openmls/openmls/Deploy%20Docs/main?label=Deploy%20Docs&logo=github&style=for-the-badge

[Developer.md]: https://github.com/openmls/openmls/blob/main/Developer.md

[Phoenix R&D]: https://phnx.im

[Cryspen]: https://cryspen.com

[Zulip]: https://zulip.com/