Trait PRF

pub trait PRF {
    type Input: Clone + CanonicalDeserialize;
    type Output: Clone + Debug + PartialEq + Eq + CanonicalSerialize;
    type Seed: Clone + Debug + Default + UniformRand + CanonicalSerialize + CanonicalDeserialize;
    type Error: Error;

    // Required method
    fn evaluate<S: Borrow<Self::Seed>, I: Borrow<Self::Input>>(
        seed: S,
        input: I,
    ) -> Result<Self::Output, Self::Error>;

    // Provided method
    fn evaluate_with_rand_seed<R: RngCore + CryptoRng, T: Borrow<Self::Input>>(
        rng: &mut R,
        input: T,
    ) -> Result<(Self::Seed, Self::Output), Self::Error> { ... }
}

Trait for Pseudo-random Functions

Required Associated Types

type Input: Clone + CanonicalDeserialize

Input to the PRF

type Output: Clone + Debug + PartialEq + Eq + CanonicalSerialize

Output of the PRF

type Seed: Clone + Debug + Default + UniformRand + CanonicalSerialize + CanonicalDeserialize

The random seed/key that index a specific function from the PRF ensembles

type Error: Error

Error type

Required Methods

fn evaluate<S: Borrow<Self::Seed>, I: Borrow<Self::Input>>( seed: S, input: I, ) -> Result<Self::Output, Self::Error>

Compute PRF output with a user-provided randomly generated seed

Provided Methods

fn evaluate_with_rand_seed<R: RngCore + CryptoRng, T: Borrow<Self::Input>>( rng: &mut R, input: T, ) -> Result<(Self::Seed, Self::Output), Self::Error>

same as Self::evaluate except that we generate a fresh random seed for the evaluation

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.

Implementors