elliptic-curve: change Curve::ORDER to be Odd#2006
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Previously it was `NonZero`. This associated constant is for the curve's prime order subgroup, which will always be odd. There are many modular algorithms which require the modulus is odd, and bounding the `ORDER` on `Odd` ensures those algorithms will be compatible with the scalar field. The `primefield` crate and the params we are computing for every field of every curve are also `Odd` (i.e. the `modulus` of `MontyParams`).
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Companion PR to https://RustCrypto/traits#2006
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Companion PR: RustCrypto/elliptic-curves#1416 |
tarcieri
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Companion PR to https://RustCrypto/traits#2006
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Companion PR to https://RustCrypto/traits#2006
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## Added - Implement `PartialEq + Eq` for `NonIdentity` and `NonZeroScalar` (#1834) - Implement `Zeroize` for `NonIdentity` (#1832) - `NonIdentity::mul_by_generator()` (#1833) - Implement `Mul<&NonZeroScalar>` for `NonIdentity` (#1852) - Implement `Mul<NonIdentity>` for `NonZeroScalar` (#1855) - Expose `AffineCoordinates::y` (#1891) - Scalar macros originall from `primeorder` (#1894) - Implement `BatchNormalize` for `NonIdentity` (#1896) - Re-export `group::Curve` as `CurveGroup` (#1902) - `NonIdentity`/`NonZeroScalar` casting methods (#1903) - `AffineCoordinates::from_coordinates` (#1996) - `getrandom` feature (#2085) - `ctutils` traits to `arithmetic` bounds (#2166) - `Retrieve` bound for `C::Scalar` (#2169) - `crypto_common::Generate` support (#2173, #2208) - Implement `crypto_common::TryKeyInit` for `SecretKey<C>` (#2174) - `dev::bench_projective!` macro (#2177) - Provide `Sec1Point::from/to_sec1_bytes` (#2221) - Implement `From<SecretKey<C>>` for `PublicKey<C>` (#2247) - `SecretKey::diffie_hellman` (#2248) - `LinearCombination::lincomb_vartime` method (#2286) - `ops::MulVartime` trait and bound `Scalar` (#2379) - `ops::MulByGeneratorVartime` trait ([#2381]) - `SecretKey::from_pem` (#2387) - `SecretKey::from_der` (#2408) - `hazmat` module with `FieldArithmetic` trait (#2458) - `Double::double_in_place` (#2464) ## Changed - Migrate from `generic-array` to `hybrid-array` (#1462) - Rename `LinearCombinationExt` => `LinearCombination`; replacing old trait (#1501) - Edition changed to 2024 and MSRV bumped to 1.85 (#1759) - Make `SecretKey::new` fallible (#1804) - Replace `ops::Invert` trait with `crypto_bigint::Invert` (#1839) - Rename `SecretKey::new` => `::from_scalar` (#1893) - Replace `Reduce` trait with `crypto_bigint::Reduce` (#1949) - Bump `serdect` dependency to v0.4 (#1978) - Use `crypto_bigint::Odd` to represent `Curve::ORDER` (#2006) - Bound `Curve::Uint` on `Unsigned` (#2007) - Rename `ScalarPrimitive` => `ScalarValue` (#2008) - Accept mixed-case hex-encoded strings in `FromStr` impl for `ScalarValue` (#2037) - Deprecate `SecretKey::random` (#2086) - Move `MockCurve` to `dev::mock_curve` (#2176) - Bump `rand_core` to v0.10 (#2250) - Rename `EncodedPoint` => `Sec1Point` (#2264) - Bump `crypto-bigint` to v0.7 (#2330) - Bump `digest` to v0.11 (#2331) - Bump `sec1` to v0.8 (#2339) - Bump `hkdf` dependency to v0.13 (#2349) - Use `*Vartime` as a suffix in names (#2378) - Bump `pkcs8` to v0.11 (#2397) - Bump `ff` and `group` to v0.14 (#2430, #2431) - Simplify `BatchInvert` trait (#2455) - Replace `FieldBytesEncoding` trait with `C::FIELD_ENDIANNESS` (#2457) - Move `Double` to `ops` module (#2465) ## Removed - `hazmat` feature (#1599) - `hash2curve` and `oprf` modules: moved to same-name crates (#1929) - PKCS#8 blanket impls for SEC1 private key traits (#1930) - `ShrAssign` bound on `Scalar`s (#1938) - JWK support: migrated to `jose-jwk` crate (#1963) - `weierstrass` module (#2005) - `bits` feature (#2417) ## Fixed - Include curve OID in SEC1 private keys (#1707, #1933)
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Previously it was
NonZero.This associated constant is for the curve's prime order subgroup, which will always be odd.
There are many modular algorithms which require the modulus is odd, and bounding the
ORDERonOddensures those algorithms will be compatible with the scalar field.The
primefieldcrate and the params we are computing for every field of every curve are alsoOdd(i.e. themodulusofMontyParams).