92 lines
3.3 KiB
Markdown
92 lines
3.3 KiB
Markdown
# [RustCrypto]: NIST P-256 (secp256r1) elliptic curve
|
|
|
|
[![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]
|
|
|
|
Pure Rust implementation of the NIST P-256 (a.k.a. secp256r1, prime256v1)
|
|
elliptic curve with support for ECDH, ECDSA signing/verification, and general
|
|
purpose curve arithmetic support implemented in terms of traits from the
|
|
[`elliptic-curve`] crate.
|
|
|
|
[Documentation][docs-link]
|
|
|
|
## ⚠️ Security Warning
|
|
|
|
The elliptic curve arithmetic contained in this crate has never been
|
|
independently audited!
|
|
|
|
This crate has been designed with the goal of ensuring that secret-dependent
|
|
operations are performed in constant time (using the `subtle` crate and
|
|
constant-time formulas). However, it has not been thoroughly assessed to ensure
|
|
that generated assembly is constant time on common CPU architectures.
|
|
|
|
USE AT YOUR OWN RISK!
|
|
|
|
## Supported Algorithms
|
|
|
|
- [Elliptic Curve Diffie-Hellman (ECDH)][ECDH]: gated under the `ecdh` feature.
|
|
- [Elliptic Curve Digital Signature Algorithm (ECDSA)][ECDSA]: gated under the
|
|
`ecdsa` feature.
|
|
|
|
## About NIST P-256
|
|
|
|
NIST P-256 is a Weierstrass curve specified in [SP 800-186]:
|
|
Recommendations for Discrete Logarithm-based Cryptography:
|
|
Elliptic Curve Domain Parameters.
|
|
|
|
Also known as prime256v1 (ANSI X9.62) and secp256r1 (SECG), it's included in
|
|
the US National Security Agency's "Suite B" and is widely used in protocols
|
|
like TLS and the associated X.509 PKI.
|
|
|
|
## Minimum Supported Rust Version
|
|
|
|
Rust **1.65** 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
|
|
|
|
## 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://buildstats.info/crate/p256
|
|
[crate-link]: https://crates.io/crates/p256
|
|
[docs-image]: https://docs.rs/p256/badge.svg
|
|
[docs-link]: https://docs.rs/p256/
|
|
[build-image]: https://github.com/RustCrypto/elliptic-curves/actions/workflows/p256.yml/badge.svg
|
|
[build-link]: https://github.com/RustCrypto/elliptic-curves/actions/workflows/p256.yml
|
|
[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
|
|
[rustc-image]: https://img.shields.io/badge/rustc-1.65+-blue.svg
|
|
[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
|
|
[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260040-elliptic-curves
|
|
|
|
[//]: # (general links)
|
|
|
|
[RustCrypto]: https://github.com/rustcrypto/
|
|
[`elliptic-curve`]: https://github.com/RustCrypto/traits/tree/master/elliptic-curve
|
|
[ECDH]: https://en.wikipedia.org/wiki/Elliptic-curve_Diffie-Hellman
|
|
[ECDSA]: https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm
|
|
[SP 800-186]: https://csrc.nist.gov/publications/detail/sp/800-186/final
|