pub struct DefaultFieldHasher<H: Default + DynDigest + Clone, const SEC_PARAM: usize = 128> { /* private fields */ }
Expand description

This field hasher constructs a Hash-To-Field based on a fixed-output hash function, like SHA2, SHA3 or Blake2. The implementation aims to follow the specification in Hashing to Elliptic Curves (draft).

Examples

use ark_ff::fields::field_hashers::{DefaultFieldHasher, HashToField};
use ark_test_curves::bls12_381::Fq;
use sha2::Sha256;

let hasher = <DefaultFieldHasher<Sha256> as HashToField<Fq>>::new(&[1, 2, 3]);
let field_elements: Vec<Fq> = hasher.hash_to_field(b"Hello, World!", 2);

assert_eq!(field_elements.len(), 2);

Trait Implementations§

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impl<F: Field, H: Default + DynDigest + Clone, const SEC_PARAM: usize> HashToField<F> for DefaultFieldHasher<H, SEC_PARAM>

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fn new(dst: &[u8]) -> Self

Initialises a new hash-to-field helper struct. Read more
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fn hash_to_field(&self, message: &[u8], count: usize) -> Vec<F>

Hash an arbitrary msg to #count elements from field F.

Auto Trait Implementations§

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impl<H, const SEC_PARAM: usize> RefUnwindSafe for DefaultFieldHasher<H, SEC_PARAM>where H: RefUnwindSafe,

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impl<H, const SEC_PARAM: usize> Send for DefaultFieldHasher<H, SEC_PARAM>where H: Send,

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impl<H, const SEC_PARAM: usize> Sync for DefaultFieldHasher<H, SEC_PARAM>where H: Sync,

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impl<H, const SEC_PARAM: usize> Unpin for DefaultFieldHasher<H, SEC_PARAM>where H: Unpin,

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impl<H, const SEC_PARAM: usize> UnwindSafe for DefaultFieldHasher<H, SEC_PARAM>where H: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same<T> for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V