RustCrypto: NIST P-256 (secp256r1) elliptic curve
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.
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!
- Elliptic Curve Diffie-Hellman (ECDH): gated under the
ecdhfeature. - Elliptic Curve Digital Signature Algorithm (ECDSA): gated under the
ecdsafeature.
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.
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.
- All on-by-default features of this library are covered by SemVer
- MSRV is considered exempt from SemVer as noted above
All crates licensed under either of
at your option.
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.