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".

Implementations on Foreign Types

impl GroupEncoding for AffinePoint

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

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

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

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

impl GroupEncoding for AffinePoint

type Repr = GroupRepr

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

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

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

impl GroupEncoding for ProjectivePoint

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

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

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

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

impl GroupEncoding for ProjectivePoint

type Repr = GroupRepr

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

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

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

impl<C> GroupEncoding for AffinePoint<C>

where C: PrimeCurveParams,

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

NOTE: not constant-time with respect to identity point

type Repr = Array<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,

type Repr = Array<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

impl<P> GroupEncoding for NonIdentity<P>

where P: ConditionallySelectable + ConstantTimeEq + Default + GroupEncoding,

type Repr = <P as GroupEncoding>::Repr

fn from_bytes( bytes: &<NonIdentity<P> as GroupEncoding>::Repr, ) -> CtOption<NonIdentity<P>>

fn from_bytes_unchecked( bytes: &<NonIdentity<P> as GroupEncoding>::Repr, ) -> CtOption<NonIdentity<P>>

fn to_bytes(&self) -> <NonIdentity<P> as GroupEncoding>::Repr

Implementors