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curve: Use constant-time compressed equality testing (#669)

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Aaron Feickert 2025-07-07 16:01:55 -05:00 committed by GitHub
parent 445fd7d59d
commit d54b196d18
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1 changed files with 9 additions and 1 deletions
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curve25519-dalek/src/ristretto.rs
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@ -218,9 +218,17 @@ use crate::traits::{MultiscalarMul, VartimeMultiscalarMul, VartimePrecomputedMul
///
/// The Ristretto encoding is canonical, so two points are equal if and
/// only if their encodings are equal.
#[derive(Copy, Clone, Eq, PartialEq, Hash)]
#[allow(clippy::derived_hash_with_manual_eq)]
#[derive(Copy, Clone, Hash)]
pub struct CompressedRistretto(pub [u8; 32]);
impl Eq for CompressedRistretto {}
impl PartialEq for CompressedRistretto {
fn eq(&self, other: &Self) -> bool {
self.ct_eq(other).into()
}
}
impl ConstantTimeEq for CompressedRistretto {
fn ct_eq(&self, other: &CompressedRistretto) -> Choice {
self.as_bytes().ct_eq(other.as_bytes())