Struct curve25519_dalek::curve::CompressedEdwardsY

pub struct CompressedEdwardsY(pub [u8; 32]);

In "Edwards y" format, the point (x,y) on the curve is determined by the y-coordinate and the sign of x, marshalled into a 32-byte array.

The first 255 bits of a CompressedEdwardsY represent the y-coordinate. The high bit of the 32nd byte gives the sign of x.

Methods

impl CompressedEdwardsY

fn as_bytes(&self) -> &[u8; 32]

View this CompressedEdwardsY as an array of bytes.

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

Copy this CompressedEdwardsY to an array of bytes. XXX is this useful?

fn decompress(&self) -> Option<ExtendedPoint>

Attempt to decompress to an ExtendedPoint.

Returns None if the input is not the y-coordinate of a curve point.

Trait Implementations

impl Copy for CompressedEdwardsY

impl Clone for CompressedEdwardsY

fn clone(&self) -> CompressedEdwardsY

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Eq for CompressedEdwardsY

impl PartialEq for CompressedEdwardsY

fn eq(&self, __arg_0: &CompressedEdwardsY) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &CompressedEdwardsY) -> bool

This method tests for !=.

impl Debug for CompressedEdwardsY

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

Formats the value using the given formatter.

impl Identity for CompressedEdwardsY

fn identity() -> CompressedEdwardsY

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