signature 1.3.1

Traits for cryptographic signature algorithms (e.g. ECDSA, Ed25519)
# RustCrypto: Digital Signature Algorithms

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This crate contains traits which provide generic, object-safe APIs for
generating and verifying [digital signatures][1].

Used by the [`ecdsa`][2] and [`ed25519`][3] crates, with forthcoming support
in the [`rsa`][4] crate.

See also the [Signatory][5] project for trait wrappers for using these traits
with many popular Rust cryptography crates, including `ed25519-dalek`, *ring*,
`secp256k1-rs`, and `sodiumoxide`.


## Minimum Supported Rust Version

Rust **1.41** or higher.

Minimum supported Rust version can be changed in the future, but it will be
done with 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 off-by-default features `derive-preview` and `digest-preview` are
  unstable "preview" features which are also considered exempt from SemVer.
  Breaking changes to these features will, like MSRV, be done with a minor
  version bump.

## License

Licensed under either of

 * [Apache License, Version 2.0](
 * [MIT license](

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.

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