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Update VOPRF to draft 19 (#307)

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This commit is contained in:
daxpedda
2023-03-04 20:31:07 -08:00
committed by GitHub
parent 5400128833
commit c255364ca0
11 changed files with 344 additions and 352 deletions
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src/key_exchange/group/elliptic_curve.rs
+9 -9
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@@ -6,12 +6,12 @@
// of this source tree.
use digest::core_api::BlockSizeUser;
use digest::Digest;
use digest::{FixedOutput, HashMarker};
use elliptic_curve::group::cofactor::CofactorGroup;
use elliptic_curve::hash2curve::{ExpandMsgXmd, FromOkm, GroupDigest};
use elliptic_curve::sec1::{FromEncodedPoint, ModulusSize, ToEncodedPoint};
use elliptic_curve::{
AffinePoint, Field, FieldSize, Group, ProjectivePoint, PublicKey, Scalar, SecretKey,
AffinePoint, Field, FieldBytesSize, Group, ProjectivePoint, PublicKey, Scalar, SecretKey,
};
use generic_array::typenum::{IsLess, IsLessOrEqual, U256};
use generic_array::GenericArray;
@@ -23,18 +23,18 @@ use crate::errors::InternalError;
impl<G> KeGroup for G
where
G: GroupDigest,
FieldSize<Self>: ModulusSize,
FieldBytesSize<Self>: ModulusSize,
AffinePoint<Self>: FromEncodedPoint<Self> + ToEncodedPoint<Self>,
ProjectivePoint<Self>: CofactorGroup + ToEncodedPoint<Self>,
Scalar<Self>: FromOkm,
{
type Pk = ProjectivePoint<Self>;
type PkLen = <FieldSize<Self> as ModulusSize>::CompressedPointSize;
type PkLen = <FieldBytesSize<Self> as ModulusSize>::CompressedPointSize;
type Sk = Scalar<Self>;
type SkLen = FieldSize<Self>;
type SkLen = FieldBytesSize<Self>;
fn serialize_pk(pk: Self::Pk) -> GenericArray<u8, Self::PkLen> {
GenericArray::clone_from_slice(pk.to_encoded_point(true).as_bytes())
@@ -51,10 +51,10 @@ where
}
// Implements the `HashToScalar()` function from
// <https://www.ietf.org/archive/id/draft-irtf-cfrg-voprf-09.html#section-4.1>
fn hash_to_scalar<H>(input: &[&[u8]], dst: &[u8]) -> Result<Self::Sk, InternalError>
// <https://www.ietf.org/archive/id/draft-irtf-cfrg-voprf-19.html#section-4>
fn hash_to_scalar<H>(input: &[&[u8]], dst: &[&[u8]]) -> Result<Self::Sk, InternalError>
where
H: Digest + BlockSizeUser,
H: BlockSizeUser + Default + FixedOutput + HashMarker,
H::OutputSize: IsLess<U256> + IsLessOrEqual<H::BlockSize>,
{
Self::hash_to_scalar::<ExpandMsgXmd<H>>(input, dst)
@@ -85,7 +85,7 @@ where
}
fn deserialize_sk(bytes: &[u8]) -> Result<Self::Sk, InternalError> {
SecretKey::<Self>::from_be_bytes(bytes)
SecretKey::<Self>::from_slice(bytes)
.map(|secret_key| *secret_key.to_nonzero_scalar())
.map_err(|_| InternalError::PointError)
}