Struct curve25519_dalek::edwards::VartimeEdwardsPrecomputation

pub struct VartimeEdwardsPrecomputation(VartimePrecomputedStraus);

Precomputation for variable-time multiscalar multiplication with EdwardsPoints.

Trait Implementations

impl VartimePrecomputedMultiscalarMul for VartimeEdwardsPrecomputation

type Point = EdwardsPoint

The type of point to be multiplied, e.g., RistrettoPoint.

fn new<I>(static_points: I) -> Self where
    I: IntoIterator,
    I::Item: Borrow<Self::Point>, 

Given the static points ( B_i ), perform precomputation and return the precomputation data.

fn optional_mixed_multiscalar_mul<I, J, K>(
    &self,
    static_scalars: I,
    dynamic_scalars: J,
    dynamic_points: K
) -> Option<Self::Point> where
    I: IntoIterator,
    I::Item: Borrow<Scalar>,
    J: IntoIterator,
    J::Item: Borrow<Scalar>,
    K: IntoIterator<Item = Option<Self::Point>>, 

Given static_scalars, an iterator of public scalars (b_i), dynamic_scalars, an iterator of public scalars (a_i), and dynamic_points, an iterator of points (A_i), compute $$ Q = a_1 A_1 + \cdots + a_n A_n + b_1 B_1 + \cdots + b_m B_m, $$ where the (B_j) are the points that were supplied to new.

fn vartime_multiscalar_mul<I>(&self, static_scalars: I) -> Self::Point where
    I: IntoIterator,
    I::Item: Borrow<Scalar>, 

Given static_scalars, an iterator of public scalars (b_i), compute $$ Q = b_1 B_1 + \cdots + b_m B_m, $$ where the (B_j) are the points that were supplied to new.

fn vartime_mixed_multiscalar_mul<I, J, K>(
    &self,
    static_scalars: I,
    dynamic_scalars: J,
    dynamic_points: K
) -> Self::Point where
    I: IntoIterator,
    I::Item: Borrow<Scalar>,
    J: IntoIterator,
    J::Item: Borrow<Scalar>,
    K: IntoIterator,
    K::Item: Borrow<Self::Point>, 

Given static_scalars, an iterator of public scalars (b_i), dynamic_scalars, an iterator of public scalars (a_i), and dynamic_points, an iterator of points (A_i), compute $$ Q = a_1 A_1 + \cdots + a_n A_n + b_1 B_1 + \cdots + b_m B_m, $$ where the (B_j) are the points that were supplied to new.