Struct SigningKey 

pub struct SigningKey(pub(crate) SigningKey);

A secp256k1 private key held on behalf of an agent.

The inner k256 key zeroizes on drop. That is a floor, not a guarantee: anything that goes through SigningKey::to_bytes is an ordinary array and is the caller’s problem.

Tuple Fields

0: SigningKey

Implementations

impl SigningKey

pub fn generate() -> Self

Generates a new key from the operating system’s CSPRNG.

pub fn from_bytes(bytes: &[u8; 32]) -> Result<Self, KeyError>

Loads a key from its 32-byte big-endian scalar, as written by SigningKey::to_bytes.

Fails for zero and for anything at or above the curve order, so a corrupted or truncated store surfaces here rather than as an unusable key later.

pub fn to_bytes(&self) -> [u8; 32]

The 32-byte big-endian scalar, for writing to custodial storage.

This is the whole secret. Nothing else in this crate exposes it.

pub fn sign(&self, message: &[u8]) -> Signature

Signs a message with ECDSA over SHA-256.

The nonce is deterministic (RFC 6979), so the same key and message give the same signature, and a bad RNG at signing time cannot leak the key.

pub fn verifying_key(&self) -> VerifyingKey

The public half.

Trait Implementations

impl Clone for SigningKey

fn clone(&self) -> SigningKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SigningKey

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

Formats the value using the given formatter.