Opaque_ke_uniffi

A Rust library that provides UniFFI bindings around the opaque-ke crate. The goal of opaque_ke_uniffi is to make OPAQUE usable from Android (Kotlin) and Swift (iOS) via generated foreign-language bindings.

Exported Functions

Client

Function	Description
client_registration_start	Begin registration with the user's password
client_registration_finish	Complete registration given the server's response
client_login_start	Begin login with the user's password
client_login_finish	Complete login and derive session key + export key

Server

Function	Description
server_setup	Generate a new server setup (keypair + OPRF seed)
server_registration_start	Process a client registration request
server_registration_finish	Finalize registration and produce a storable password file
server_login_start	Process a client credential request
server_login_finish	Verify the client's credential finalization and derive session key

Building

Android (.aar)

Using Docker (recommended)

docker build --output build .
Produces a .aar in the build/ directory - no local dependencies required.

Using Make

make aar
Requires the Android SDK/NDK, cargo-ndk, and the Gradle wrapper in android/
Individual targets are also available. List with:
make help

iOS

Use make to build a .xcframework file:
make swift-setup
make swift

License

This project is licensed under the European Union Public License 1.2 (EUPL-1.2).

Third-Party Notices

This project incorporates the following third-party components:

• opaque-ke (Apache-2.0 OR MIT)
• uniffi-rs (MPL-2.0)
• voprf (Apache-2.0 OR MIT)
• p256 (Apache-2.0 OR MIT)
• rand (Apache-2.0 OR MIT)