Struct k256::Secp256k1

pub struct Secp256k1;

K-256 (secp256k1) elliptic curve.

Specified in Certicom's SECG in "SEC 2: Recommended Elliptic Curve Domain Parameters":

https://www.secg.org/sec2-v2.pdf

The curve's equation is y² = x³ + 7 over a ~256-bit prime field.

It's primarily notable for usage in Bitcoin and other cryptocurrencies, particularly in conjunction with the Elliptic Curve Digital Signature Algorithm (ECDSA).

Trait Implementations

impl Arithmetic for Secp256k1

type Scalar = Scalar

Scalar type for a given curve

type AffinePoint = AffinePoint

Affine point type for a given curve

impl Clone for Secp256k1

fn clone(&self) -> Secp256k1

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Curve for Secp256k1

type ElementSize = U32

256-bit (32-byte)

impl Curve for Secp256k1

const COMPRESS_POINTS: bool

secp256k1 points are typically compressed.

impl Debug for Secp256k1

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for Secp256k1

fn default() -> Secp256k1

Returns the "default value" for a type.

impl DigestPrimitive for Secp256k1

type Digest = Sha256

Preferred digest to use when computing ECDSA signatures for this elliptic curve. This should be a member of the SHA-2 family.

impl Eq for Secp256k1

impl FromPublicKey<Secp256k1> for AffinePoint

fn from_public_key(pubkey: &PublicKey) -> CtOption<Self>

Attempts to parse the given PublicKey as an SEC-1-encoded AffinePoint.

Returns

None value if pubkey is not on the secp256k1 curve.

impl Identifier for Secp256k1

const OID: ObjectIdentifier

Object Identifier (OID) for this curve

impl Ord for Secp256k1

fn cmp(&self, other: &Secp256k1) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<Secp256k1> for Secp256k1

fn eq(&self, other: &Secp256k1) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl PartialOrd<Secp256k1> for Secp256k1

fn partial_cmp(&self, other: &Secp256k1) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use]fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use]fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use]fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl RecoverableSignPrimitive<Secp256k1> for Scalar

type RecoverableSignature = Signature

Type for recoverable signatures

fn try_sign_recoverable_prehashed<K>(
    &self,
    ephemeral_scalar: &K,
    hashed_msg: &ElementBytes
) -> Result<Signature, Error> where
    K: Borrow<Scalar> + Invert<Output = Scalar>, 

Try to sign the prehashed message.

impl StructuralEq for Secp256k1

impl StructuralPartialEq for Secp256k1

impl VerifyPrimitive<Secp256k1> for AffinePoint

fn verify_prehashed(
    &self,
    hashed_msg: &ElementBytes,
    signature: &Signature
) -> Result<(), Error>

Verify the prehashed message against the provided signature