# [RustCrypto]: X.509 Subject Public Key Info (SPKI)
[![crate][crate-image]][crate-link]
[![Docs][docs-image]][docs-link]
[![Build Status][build-image]][build-link]
![Apache2/MIT licensed][license-image]
![Rust Version][rustc-image]
[![Project Chat][chat-image]][chat-link]
[X.509] Subject Public Key Info types describing public keys as well as their
associated AlgorithmIdentifiers (i.e. OIDs).
Specified in [RFC 5280 § 4.1].
[Documentation][docs-link]
## Minimum Supported Rust Version
This crate requires **Rust 1.71** at a minimum.
We may change the MSRV in the future, but it will be accompanied by a minor
version bump.
## License
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://buildstats.info/crate/spki
[crate-link]: https://crates.io/crates/spki
[docs-image]: https://docs.rs/spki/badge.svg
[docs-link]: https://docs.rs/spki/
[build-image]: https://github.com/RustCrypto/formats/actions/workflows/spki.yml/badge.svg
[build-link]: https://github.com/RustCrypto/formats/actions/workflows/spki.yml
[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
[rustc-image]: https://img.shields.io/badge/rustc-1.71+-blue.svg
[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/300570-formats
[//]: # (links)
[RustCrypto]: https://github.com/rustcrypto
[X.509]: https://en.wikipedia.org/wiki/X.509
[RFC 5280 § 4.1]: https://tools.ietf.org/html/rfc5280#section-4.1