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Fill out dalek-ff-group a bit more

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This commit is contained in:
Luke Parker 2022-06-03 15:35:42 -04:00
parent f8d127bf8a
commit 33241a5bb6
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GPG key ID: F9F1386DB1E119B6
1 changed files with 10 additions and 8 deletions
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18
crypto/dalek-ff-group/src/lib.rs
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@ -13,7 +13,7 @@ pub use curve25519_dalek as dalek;
use dalek::{
constants,
traits::{Identity, IsIdentity},
traits::Identity,
scalar::Scalar as DScalar,
edwards::{
EdwardsPoint as DPoint,
@ -102,11 +102,13 @@ impl<'a> MulAssign<&'a Scalar> for Scalar {
}
impl ConstantTimeEq for Scalar {
fn ct_eq(&self, _: &Self) -> Choice { unimplemented!() }
fn ct_eq(&self, other: &Self) -> Choice { self.0.ct_eq(&other.0) }
}
impl ConditionallySelectable for Scalar {
fn conditional_select(_: &Self, _: &Self, _: Choice) -> Self { unimplemented!() }
fn conditional_select(a: &Self, b: &Self, choice: Choice) -> Self {
Scalar(DScalar::conditional_select(a, b, choice))
}
}
impl Field for Scalar {
@ -124,7 +126,7 @@ impl Field for Scalar {
CtOption::new(Self(self.0.invert()), Choice::from(1 as u8))
}
fn sqrt(&self) -> CtOption<Self> { unimplemented!() }
fn is_zero(&self) -> Choice { Choice::from(if self.0 == DScalar::zero() { 1 } else { 0 }) }
fn is_zero(&self) -> Choice { self.0.ct_eq(&DScalar::zero()) }
fn cube(&self) -> Self { *self * self * self }
fn pow_vartime<S: AsRef<[u64]>>(&self, _exp: S) -> Self { unimplemented!() }
}
@ -146,9 +148,9 @@ impl PrimeField for Scalar {
}
fn to_repr(&self) -> [u8; 32] { self.0.to_bytes() }
const S: u32 = 0;
const S: u32 = 2;
fn is_odd(&self) -> Choice { unimplemented!() }
fn multiplicative_generator() -> Self { unimplemented!() }
fn multiplicative_generator() -> Self { 2u64.into() }
fn root_of_unity() -> Self { unimplemented!() }
}
@ -245,10 +247,10 @@ impl<'a> MulAssign<&'a Scalar> for EdwardsPoint {
impl Group for EdwardsPoint {
type Scalar = Scalar;
fn random(mut _rng: impl RngCore) -> Self { unimplemented!() }
fn random(rng: impl RngCore) -> Self { &ED25519_BASEPOINT_TABLE * Scalar::random(rng) }
fn identity() -> Self { Self(DPoint::identity()) }
fn generator() -> Self { ED25519_BASEPOINT_POINT }
fn is_identity(&self) -> Choice { (self.0.is_identity() as u8).into() }
fn is_identity(&self) -> Choice { self.0.ct_eq(&DPoint::identity()) }
fn double(&self) -> Self { *self + self }
}