Struct p256_cortex_m4::SecretKey

pub struct SecretKey(/* private fields */);

NIST P-256 secret key.

The internal representation is as little-endian (native) words.

Implementations

impl SecretKey

pub fn random(rng: impl CryptoRng + RngCore) -> Self

Generate a random SecretKey.

The implementation uses rejection sampling.

pub fn from_bytes(bytes: impl AsRef<[u8]>) -> Result<Self>

Verifies that there are 32 bytes that correspond to a big-endian integer in the range 1..=n-1.

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

Convert endianness to obtain the big-endian representation of the secret scalar as 32 bytes.

“unsafe” because the caller is responsible for keeping the value secret.

pub fn public_key(&self) -> PublicKey

Calculate associated public key.

pub fn sign_prehashed( &self, prehashed_message: &[u8], rng: impl CryptoRng + RngCore ) -> Signature

Non-deterministic signature on message assumed to be hashed, if needed.

Internally, draws 256-bit k repeatedly, until signing succeeds.

pub fn agree(&self, other: &PublicKey) -> SharedSecret

ECDH key agreement.

Trait Implementations

impl Clone for SecretKey

fn clone(&self) -> SecretKey

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Zeroize for SecretKey

fn zeroize(&mut self)

Zero out this object from memory using Rust intrinsics which ensure the zeroization operation is not “optimized away” by the compiler.