Struct curve25519_dalek::edwards::CompressedEdwardsY

[+] Show declaration

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

[−] Expand description

In “Edwards y” / “Ed25519” format, the curve point \((x,y)\) is determined by the \(y\)-coordinate and the sign of \(x\).

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

Implementations

impl CompressedEdwardsY[−]

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

View this CompressedEdwardsY as an array of bytes.

pub fn to_bytes(&self) -> [u8; 32][−]

Copy this CompressedEdwardsY to an array of bytes.

pub fn decompress(&self) -> Option<EdwardsPoint>[−]

Attempt to decompress to an EdwardsPoint.

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

impl CompressedEdwardsY[−]

pub fn from_slice(bytes: &[u8]) -> CompressedEdwardsY[−]

Construct a CompressedEdwardsY from a slice of bytes.

Panics

If the input bytes slice does not have a length of 32.

Trait Implementations

impl Clone for CompressedEdwardsY[+]

[+] Show hidden undocumented items

fn clone(&self) -> CompressedEdwardsY[−]

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl ConstantTimeEq for CompressedEdwardsY[+]

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fn ct_eq(&self, other: &CompressedEdwardsY) -> Choice[−]

Determine if two items are equal.

impl Copy for CompressedEdwardsY

impl Debug for CompressedEdwardsY[+]

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

Formats the value using the given formatter.

impl Default for CompressedEdwardsY[+]

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fn default() -> CompressedEdwardsY[−]

Returns the “default value” for a type.

impl Eq for CompressedEdwardsY

impl Hash for CompressedEdwardsY[+]

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fn hash<__H: Hasher>(&self, state: &mut __H)[−]

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, [−]

Feeds a slice of this type into the given Hasher.

impl Identity for CompressedEdwardsY[+]

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fn identity() -> CompressedEdwardsY[−]

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

impl PartialEq<CompressedEdwardsY> for CompressedEdwardsY[+]

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fn eq(&self, other: &CompressedEdwardsY) -> bool[−]

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

fn ne(&self, other: &CompressedEdwardsY) -> bool[−]

This method tests for !=.

impl StructuralEq for CompressedEdwardsY

impl StructuralPartialEq for CompressedEdwardsY