OpenMLS
OpenMLS is a Rust implementation of Messaging Layer Security.
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
Additionally, we're building and testing aarch64-unknown-linux-gnu on drone.io.
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 backends implemented right now. But consumers can bring their own implementation. See 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.