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Merge pull request #352 from isislovecruft/feature/montgomery-identity

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Implement Identity for MontgomeryPoint.
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isis agora lovecruft 2021-04-21 02:28:12 +00:00 committed by GitHub
commit b61831b7cf
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src/montgomery.rs
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@ -94,6 +94,13 @@ impl PartialEq for MontgomeryPoint {
impl Eq for MontgomeryPoint {}
impl Identity for MontgomeryPoint {
/// Return the group identity element, which has order 4.
fn identity() -> MontgomeryPoint {
MontgomeryPoint([0u8; 32])
}
}
impl Zeroize for MontgomeryPoint {
fn zeroize(&mut self) {
self.0.zeroize();
@ -351,6 +358,19 @@ mod test {
use rand_core::OsRng;
#[test]
fn identity_in_different_coordinates() {
let id_projective = ProjectivePoint::identity();
let id_montgomery = id_projective.to_affine();
assert!(id_montgomery == MontgomeryPoint::identity());
}
#[test]
fn identity_in_different_models() {
assert!(EdwardsPoint::identity().to_montgomery() == MontgomeryPoint::identity());
}
#[test]
#[cfg(feature = "serde")]
fn serde_bincode_basepoint_roundtrip() {