[RustCrypto]: Ed25519

Edwards Digital Signature Algorithm (EdDSA) over Curve25519 as specified in RFC 8032.

About

This crate doesn't contain an implementation of Ed25519, but instead contains an ed25519::Signature type which other crates can use in conjunction with the signature::Signer and signature::Verifier 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.

Minimum Supported Rust Version

This crate requires Rust 1.56 at a minimum as it is a Rust 2021 edition crate.

Previous 1.x releases of this crate supported an MSRV of 1.47. If you would like to use this crate with earlier releases of Rust, add the following version constraint in your project's Cargo.toml to constrain it to the supported version range:

toml [dependencies] ed25519 = ">=1, <1.4" # ed25519 1.4 requires MSRV 1.56

Note that is our policy that we may change the MSRV in the future, but it will be accompanied by a minor version bump.

SemVer Policy

All on-by-default features of this library are covered by SemVer
MSRV is considered exempt from SemVer as noted above
The pkcs8 crate is exempted as it's a pre-1.0 dependency, however, upgrades to this crate will be accompanied by a minor version bump.

License

All crates licensed under either of

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.