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elliptic-curve: add ff and group bounds on Arithmetic trait #291

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Merged
tarcieri merged 1 commit into from
Sep 8, 2020
Merged

elliptic-curve: add ff and group bounds on Arithmetic trait #291

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8 changes: 6 additions & 2 deletions elliptic-curve/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -84,13 +84,17 @@ pub trait Curve: Clone + Debug + Default + Eq + Ord + Send + Sync {

/// Elliptic curve with curve arithmetic support
pub trait Arithmetic: Curve {
/// Scalar type for a given curve
type Scalar: ConditionallySelectable
/// Scalar type for a given curve.
type Scalar: ff::PrimeField
+ ConstantTimeEq
+ Default
+ FromBytes<Size = Self::FieldSize>
+ Into<ElementBytes<Self>>;

/// Elliptic curve point in projective coordinates.
type ProjectivePoint: group::Curve<AffineRepr = Self::AffinePoint>
+ group::Group<Scalar = Self::Scalar>;

/// Affine point type for a given curve
type AffinePoint: ConditionallySelectable
+ Mul<scalar::NonZeroScalar<Self>, Output = Self::AffinePoint>
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