Struct BlindedScalar

pub struct BlindedScalar<C>
where
    C: CurveArithmetic,
{ /* private fields */ }

Scalar blinded with a randomly generated masking value.

This provides a randomly blinded impl of Invert which is useful for e.g. ECDSA ephemeral (k) scalars.

It implements masked variable-time inversions using Stein’s algorithm, which may be helpful for performance on embedded platforms.

Implementations

impl<C> BlindedScalar<C>

where C: CurveArithmetic,

pub fn new(scalar: Scalar<C>, rng: &mut impl CryptoRngCore) -> Self

Create a new BlindedScalar from a scalar and a CryptoRngCore.

Trait Implementations

impl<C> AsRef<<C as CurveArithmetic>::Scalar> for BlindedScalar<C>

where C: CurveArithmetic,

fn as_ref(&self) -> &Scalar<C>

Converts this type into a shared reference of the (usually inferred) input type.

impl<C> Clone for BlindedScalar<C>

where C: CurveArithmetic + Clone,

fn clone(&self) -> BlindedScalar<C>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<C> Drop for BlindedScalar<C>

where C: CurveArithmetic,

fn drop(&mut self)

Executes the destructor for this type.

impl<C> Invert for BlindedScalar<C>

where C: CurveArithmetic,

type Output = CtOption<<C as CurveArithmetic>::Scalar>

Field element type

fn invert(&self) -> CtOption<Scalar<C>>

Invert a field element.

fn invert_vartime(&self) -> Self::Output

Invert a field element in variable time.