Crate p521 

RustCrypto: NIST P-521 (secp521r1) elliptic curve

Pure Rust implementation of the NIST P-521 (a.k.a. secp521r1) elliptic curve.

Documentation

⚠️ 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): gated under the ecdh feature.
• Elliptic Curve Digital Signature Algorithm (ECDSA): gated under the ecdsa feature.

About P-521

NIST P-521 is a Weierstrass curve specified in SP 800-186: Recommendations for Discrete Logarithm-based Cryptography: Elliptic Curve Domain Parameters.

Also known as secp521r1 (SECG).

License

All crates 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.

serde support

When the serde feature of this crate is enabled, Serialize and Deserialize are impl’d for the following types:

• AffinePoint
• ProjectivePoint
• Scalar

Please see type-specific documentation for more information.

Re-exports

pub use elliptic_curve;

pub use elliptic_curve::pkcs8;

Modules

arithmetic 🔒

Pure Rust implementation of group operations on secp521r1.

ecdh

Elliptic Curve Diffie-Hellman (Ephemeral) Support.

ecdsa

Elliptic Curve Digital Signature Algorithm (ECDSA)

Structs

NistP521

NIST P-521 elliptic curve.

Scalar

Element in the NIST P-521 scalar field modulo n.

Constants

ORDER_HEX 🔒

Order of NIST P-521’s elliptic curve group (i.e. scalar modulus) in hexadecimal.

Type Aliases

AffinePoint

Elliptic curve point in affine coordinates.

CompressedPoint

Compressed SEC1-encoded NIST P-521 curve point.

FieldBytes

NIST P-521 field element serialized as bytes.

NonZeroScalar

Non-zero NIST P-521 scalar field element.

ProjectivePoint

Elliptic curve point in projective coordinates.

PublicKey

NIST P-521 public key.

Sec1Point

NIST P-521 SEC1 encoded point.

SecretKey

NIST P-521 secret key.