Struct Es256Signer 

pub struct Es256Signer { /* private fields */ }

A local ES256 signer: a P-256 SigningKey plus its key id.

Signing is deterministic (RFC 6979) and low-S normalized, so re-signing the same Sig_structure yields byte-identical output: the profile’s determinism guarantee holds for ES256 as it does for EdDSA.

Implementations

impl Es256Signer

pub fn from_secret_bytes( key_id: KeyId, secret: &Zeroizing<[u8; 32]>, ) -> Result<Self, KeyError>

Build a signer from the 32 secret scalar bytes (big-endian).

Errors

KeyError::InvalidPrivateKey if the bytes are not a valid non-zero P-256 scalar.

pub fn public_key_sec1(&self) -> Vec<u8>

The uncompressed SEC1 public key bytes (0x04 || X || Y, 65 bytes) for this signer.

Trait Implementations

impl Signer for Es256Signer

fn key_id(&self) -> &KeyId

The signing key id; becomes the outer kid.

fn algorithm(&self) -> SignatureAlgorithm

The signature algorithm this signer produces.

async fn sign(&self, sig_structure: &[u8]) -> Result<Signature, SignError>

Sign the exact Sig_structure bytes.