Struct curve25519_dalek::montgomery::ProjectivePoint

struct ProjectivePoint {
    pub U: FieldElement51,
    pub W: FieldElement51,
}

A ProjectivePoint holds a point on the projective line \( \mathbb P(\mathbb F_p) \), which we identify with the Kummer line of the Montgomery curve.

Fields

U: FieldElement51

W: FieldElement51

Implementations

impl ProjectivePoint

pub fn to_affine(&self) -> MontgomeryPoint

Dehomogenize this point to affine coordinates.

Return

• \( u = U / W \) if \( W \neq 0 \);
• \( 0 \) if \( W \eq 0 \);

Trait Implementations

impl Clone for ProjectivePoint

fn clone(&self) -> ProjectivePoint

Returns a copy of the value.

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

Performs copy-assignment from source.

impl ConditionallySelectable for ProjectivePoint

fn conditional_select(
    a: &ProjectivePoint,
    b: &ProjectivePoint,
    choice: Choice
) -> ProjectivePoint

Select a or b according to choice.

fn conditional_assign(&mut self, other: &Self, choice: Choice)

Conditionally assign other to self, according to choice.

fn conditional_swap(a: &mut Self, b: &mut Self, choice: Choice)

Conditionally swap self and other if choice == 1; otherwise, reassign both unto themselves.

impl Debug for ProjectivePoint

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

Formats the value using the given formatter.

impl Default for ProjectivePoint

fn default() -> ProjectivePoint

Returns the “default value” for a type.

impl Identity for ProjectivePoint

fn identity() -> ProjectivePoint

Returns the identity element of the curve. Can be used as a constructor.

impl Copy for ProjectivePoint