# `ed25519` crate
[![crate][crate-image]][crate-link]
[![Docs][docs-image]][docs-link]
![Apache2/MIT licensed][license-image]
![Rust Version][rustc-image]
[![Build Status][build-image]][build-link]
Edwards Digital Signature Algorithm (EdDSA) over Curve25519 as specified in
[RFC 8032][1].
This crate doesn't contain an implementation of Ed25519, but instead
contains an [`ed25519::Signature`][2] type which other crates can use in
conjunction with the [`signature::Signer`][3] and [`signature::Verifier`][4]
traits.
These traits allow crates which produce and consume Ed25519 signatures
to be written abstractly in such a way that different signer/verifier
providers can be plugged in, enabling support for using different
Ed25519 implementations, including HSMs or Cloud KMS services.
[Documentation][docs-link]
## Requirements
- Rust **1.40+**
## License
All crates licensed under either of
* [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
* [MIT license](http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.
[//]: # (badges)
[crate-image]: https://img.shields.io/crates/v/ed25519.svg
[crate-link]: https://crates.io/crates/ed25519
[docs-image]: https://docs.rs/ed25519/badge.svg
[docs-link]: https://docs.rs/ed25519/
[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
[rustc-image]: https://img.shields.io/badge/rustc-1.40+-blue.svg
[build-image]: https://github.com/RustCrypto/signatures/workflows/ed25519/badge.svg?branch=master&event=push
[build-link]: https://github.com/RustCrypto/signatures/actions?query=workflow%3Aed25519
[//]: # (general links)
[1]: https://tools.ietf.org/html/rfc8032
[2]: https://docs.rs/ed25519/latest/ed25519/struct.Signature.html
[3]: https://docs.rs/signature/latest/signature/trait.Signer.html
[4]: https://docs.rs/signature/latest/signature/trait.Verifier.html