Struct Input 

pub struct Input<S: Suite>(pub AffinePoint<S>);

VRF input point generic over the cipher suite.

Elliptic curve point representing the VRF input.

Tuple Fields

0: AffinePoint<S>

Implementations

impl<S: Suite> Input<S>

pub fn new(data: &[u8]) -> Option<Self>

Construct from Suite::data_to_point.

Maps arbitrary data to a curve point via hash-to-curve.

impl<S: Suite> Input<S>

pub fn from_affine(value: AffinePoint<S>) -> Result<Self, Error>

Construct from an affine point with subgroup validation.

Returns Error::InvalidData if the point is not in the prime-order subgroup.

Note: this only validates subgroup membership, not that the point was produced by hash-to-curve. The caller is still responsible for ensuring the point is not in a known discrete-log relation with the suite generator (required for Thin-VRF soundness).

pub fn from_affine_unchecked(value: AffinePoint<S>) -> Self

Construct from an affine point without subgroup checks.

Safety

The caller must ensure that value is in the prime-order subgroup and was produced by a hash-to-curve procedure (or is otherwise not in a known discrete-log relation with the suite generator). The latter is required for the soundness of schemes like Thin-VRF where the input and generator are delinearized into a single check.

Trait Implementations

impl<S: Suite> CanonicalDeserialize for Input<S>

fn deserialize_with_mode<R: Read>( reader: R, compress: Compress, validate: Validate, ) -> Result<Self, SerializationError>

The general deserialize method that takes in customization flags.

fn deserialize_compressed<R>(reader: R) -> Result<Self, SerializationError>

where R: Read,

fn deserialize_compressed_unchecked<R>( reader: R, ) -> Result<Self, SerializationError>

where R: Read,

fn deserialize_uncompressed<R>(reader: R) -> Result<Self, SerializationError>

where R: Read,

fn deserialize_uncompressed_unchecked<R>( reader: R, ) -> Result<Self, SerializationError>

where R: Read,

impl<S: Suite> CanonicalSerialize for Input<S>

fn serialize_with_mode<W: Write>( &self, writer: W, compress: Compress, ) -> Result<(), SerializationError>

The general serialize method that takes in customization flags.

fn serialized_size(&self, compress: Compress) -> usize

fn serialize_compressed<W>(&self, writer: W) -> Result<(), SerializationError>

where W: Write,

fn compressed_size(&self) -> usize

fn serialize_uncompressed<W>(&self, writer: W) -> Result<(), SerializationError>

where W: Write,

fn uncompressed_size(&self) -> usize

impl<S: Clone + Suite> Clone for Input<S>

fn clone(&self) -> Input<S>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<S: Debug + Suite> Debug for Input<S>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<S: PartialEq + Suite> PartialEq for Input<S>

fn eq(&self, other: &Input<S>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<S: Suite> Valid for Input<S>

fn check(&self) -> Result<(), SerializationError>

fn batch_check<'a>( batch: impl Iterator<Item = &'a Self> + Send, ) -> Result<(), SerializationError>

where Self: 'a,

impl<S: Copy + Suite> Copy for Input<S>

impl<S: Eq + Suite> Eq for Input<S>

impl<S: Suite> StructuralPartialEq for Input<S>