saymrwulf/pasta_curves-source
1
0
Fork 0
mirror of https://github.com/saymrwulf/pasta_curves-source.git synced 2026-09-04 20:03:39 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add Coordinates constructor

Browse source
This commit is contained in:
David Nevado 2022-03-12 15:46:43 +01:00
parent 8a3643682f
commit 8b101d67c4
No known key found for this signature in database
GPG key ID: 30807CB0B8A17E6C
1 changed files with 5 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
src/arithmetic/curves.rs
View file

@ -140,6 +140,11 @@ pub struct Coordinates<C: CurveAffine> {
#[cfg(feature = "alloc")] #[cfg(feature = "alloc")]
impl<C: CurveAffine> Coordinates<C> { impl<C: CurveAffine> Coordinates<C> {
/// Obtains a `Coordinates` value given $(x, y)$, failing if it is not on the curve.
pub fn from_xy(x: C::Base, y: C::Base) -> CtOption<Self> {
// We use CurveAffine::from_xy to validate the coordinates.
C::from_xy(x, y).map(|_| Coordinates { x, y })
}
/// Returns the x-coordinate. /// Returns the x-coordinate.
/// ///
/// Equivalent to `Coordinates::u`. /// Equivalent to `Coordinates::u`.