chore: checkpoint before Python removal

vendor/primeorder/src/lib.rs

@@ -0,0 +1,53 @@
+#![no_std]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![doc(
+    html_logo_url = "https://raw.githubusercontent.com/RustCrypto/meta/master/logo.svg",
+    html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/meta/master/logo.svg"
+)]
+#![forbid(unsafe_code)]
+#![warn(missing_docs, rust_2018_idioms, unused_qualifications)]
+#![doc = include_str!("../README.md")]
+
+#[cfg(feature = "alloc")]
+#[macro_use]
+extern crate alloc;
+
+pub mod point_arithmetic;
+
+mod affine;
+#[cfg(feature = "dev")]
+mod dev;
+mod field;
+mod projective;
+
+pub use crate::{affine::AffinePoint, projective::ProjectivePoint};
+pub use elliptic_curve::{
+    self, generic_array, point::Double, Field, FieldBytes, PrimeCurve, PrimeField,
+};
+
+use elliptic_curve::CurveArithmetic;
+
+/// Parameters for elliptic curves of prime order which can be described by the
+/// short Weierstrass equation.
+pub trait PrimeCurveParams:
+    PrimeCurve
+    + CurveArithmetic
+    + CurveArithmetic<AffinePoint = AffinePoint<Self>>
+    + CurveArithmetic<ProjectivePoint = ProjectivePoint<Self>>
+{
+    /// Base field element type.
+    // TODO(tarcieri): add `Invert` bound
+    type FieldElement: PrimeField<Repr = FieldBytes<Self>>;
+
+    /// [Point arithmetic](point_arithmetic) implementation, might be optimized for this specific curve
+    type PointArithmetic: point_arithmetic::PointArithmetic<Self>;
+
+    /// Coefficient `a` in the curve equation.
+    const EQUATION_A: Self::FieldElement;
+
+    /// Coefficient `b` in the curve equation.
+    const EQUATION_B: Self::FieldElement;
+
+    /// Generator point's affine coordinates: (x, y).
+    const GENERATOR: (Self::FieldElement, Self::FieldElement);
+}