Trait GroupEncoding 

pub trait GroupEncoding: Sized {
    type Repr: Copy + Default + Send + Sync + 'static + AsRef<[u8]> + AsMut<[u8]>;

    // Required methods
    fn from_bytes(bytes: &Self::Repr) -> CtOption<Self>;
    fn from_bytes_unchecked(bytes: &Self::Repr) -> CtOption<Self>;
    fn to_bytes(&self) -> Self::Repr;
}

Required Associated Types

type Repr: Copy + Default + Send + Sync + 'static + AsRef<[u8]> + AsMut<[u8]>

The encoding of group elements.

The Default implementation is not required to return a valid point encoding. The bound is present to enable encodings to be constructed generically:

let mut encoding = <G as GroupEncoding>::Repr::default();
encoding.as_mut().copy_from_slice(buf);

It is recommended that the default should be the all-zeroes encoding.

Required Methods

fn from_bytes(bytes: &Self::Repr) -> CtOption<Self>

Attempts to deserialize a group element from its encoding.

fn from_bytes_unchecked(bytes: &Self::Repr) -> CtOption<Self>

Attempts to deserialize a group element, not checking if the element is valid.

This is dangerous to call unless you trust the bytes you are reading; otherwise, API invariants may be broken. Please consider using GroupEncoding::from_bytes instead.

fn to_bytes(&self) -> Self::Repr

Converts this element into its byte encoding. This may or may not support encoding the identity.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<C> GroupEncoding for AffinePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy, <C as Curve>::FieldBytesSize: ModulusSize, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy, <<<C as Curve>::FieldBytesSize as ModulusSize>::UncompressedPointSize as ArrayLength<u8>>::ArrayType: Copy,

fn from_bytes( bytes: &<AffinePoint<C> as GroupEncoding>::Repr, ) -> CtOption<AffinePoint<C>>

NOTE: not constant-time with respect to identity point

type Repr = GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>

fn from_bytes_unchecked( bytes: &<AffinePoint<C> as GroupEncoding>::Repr, ) -> CtOption<AffinePoint<C>>

fn to_bytes(&self) -> <AffinePoint<C> as GroupEncoding>::Repr

impl<C> GroupEncoding for ProjectivePoint<C>

where C: PrimeCurveParams, GenericArray<u8, <C as Curve>::FieldBytesSize>: Copy, <C as Curve>::FieldBytesSize: ModulusSize, GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>: Copy, <<<C as Curve>::FieldBytesSize as ModulusSize>::UncompressedPointSize as ArrayLength<u8>>::ArrayType: Copy,

type Repr = GenericArray<u8, <<C as Curve>::FieldBytesSize as ModulusSize>::CompressedPointSize>

fn from_bytes( bytes: &<ProjectivePoint<C> as GroupEncoding>::Repr, ) -> CtOption<ProjectivePoint<C>>

fn from_bytes_unchecked( bytes: &<ProjectivePoint<C> as GroupEncoding>::Repr, ) -> CtOption<ProjectivePoint<C>>

fn to_bytes(&self) -> <ProjectivePoint<C> as GroupEncoding>::Repr

Implementors

impl GroupEncoding for airbender_crypto::k256::AffinePoint

type Repr = GenericArray<u8, UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B1>>

impl GroupEncoding for airbender_crypto::k256::ProjectivePoint

type Repr = GenericArray<u8, UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B1>>

impl<P> GroupEncoding for NonIdentity<P>

where P: ConditionallySelectable + ConstantTimeEq + Default + GroupEncoding,

type Repr = <P as GroupEncoding>::Repr