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Correct decoding identity for embedwards25519/secq256k1

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This commit is contained in:
Luke Parker
2025-01-29 23:01:45 -05:00
parent 2bc880e372
commit 315d4fb356
4 changed files with 14 additions and 6 deletions
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8
crypto/ff-group-tests/src/group.rs
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@@ -154,18 +154,20 @@ pub fn test_group<R: RngCore, G: Group>(rng: &mut R) {
/// Test encoding and decoding of group elements.
pub fn test_encoding<G: PrimeGroup>() {
let test = |point: G, msg| {
let test = |point: G, msg| -> G {
let bytes = point.to_bytes();
let mut repr = G::Repr::default();
repr.as_mut().copy_from_slice(bytes.as_ref());
assert_eq!(point, G::from_bytes(&repr).unwrap(), "{msg} couldn't be encoded and decoded");
let decoded = G::from_bytes(&repr).unwrap();
assert_eq!(point, decoded, "{msg} couldn't be encoded and decoded");
assert_eq!(
point,
G::from_bytes_unchecked(&repr).unwrap(),
"{msg} couldn't be encoded and decoded",
);
decoded
};
test(G::identity(), "identity");
assert!(bool::from(test(G::identity(), "identity").is_identity()));
test(G::generator(), "generator");
test(G::generator() + G::generator(), "(generator * 2)");
}