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ff: Remove SqrtField trait

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The sqrt() function is now part of the Field trait. ff_derive returns an
error on fields for which it does not support generating a square root
function.

Note that Fq6 and Fq12 in pairing::bls12_381 leave the function
unimplemented. They will be dropped once the migration to the bls12_381
crate is complete. The equivalent structs in that crate are not exposed.
This commit is contained in:
Jack Grigg
2020-05-01 13:48:30 +12:00
parent b02cf3b467
commit 1761ebfb35
20 changed files with 124 additions and 137 deletions
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10
group/src/lib.rs
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@@ -1,7 +1,7 @@
// Catch documentation errors caused by code changes.
#![deny(intra_doc_link_resolution_failure)]
use ff::{PrimeField, ScalarEngine, SqrtField};
use ff::{Field, PrimeField, ScalarEngine};
use rand::RngCore;
use std::error::Error;
use std::fmt;
@@ -47,8 +47,8 @@ pub trait CurveProjective:
+ CurveOpsOwned<<Self as CurveProjective>::Affine>
{
type Engine: ScalarEngine<Fr = Self::Scalar>;
type Scalar: PrimeField + SqrtField;
type Base: SqrtField;
type Scalar: PrimeField;
type Base: Field;
type Affine: CurveAffine<Projective = Self, Scalar = Self::Scalar>;
/// Returns an element chosen uniformly at random using a user-provided RNG.
@@ -105,8 +105,8 @@ pub trait CurveAffine:
+ Neg<Output = Self>
{
type Engine: ScalarEngine<Fr = Self::Scalar>;
type Scalar: PrimeField + SqrtField;
type Base: SqrtField;
type Scalar: PrimeField;
type Base: Field;
type Projective: CurveProjective<Affine = Self, Scalar = Self::Scalar>;
type Uncompressed: EncodedPoint<Affine = Self>;
type Compressed: EncodedPoint<Affine = Self>;