binius_hash::hasher

Trait FixedLenHasher

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pub trait FixedLenHasher<T>
where
    Self: Sized,
{
    type Digest;

    // Required methods
    fn new(msg_len: u64) -> Self;
    fn update(&mut self, data: impl AsRef<[T]>);
    fn chain_update(self, data: impl AsRef<[T]>) -> Self;
    fn finalize(self) -> Result<Self::Digest, HashError>;
    fn reset(&mut self);
}
Expand description

Trait representing a family of fixed-length cryptographic hash functions which is generic over the input type.

A fixed-length hash has the property that the amount of data in the preimage is fixed, and so must be specified up front when constructing the hasher. The [FixedLenHasher::finalize] will fail if the amount of data the hasher is updated with does not match the specified length. A family of fixed-length hash functions retains the property that is it impossible to find collisions between any two inputs, even those differing in length.

This interface is otherwise similar to the Hasher trait.

Required Associated Types§

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type Digest

The hash function output type.

Required Methods§

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fn new(msg_len: u64) -> Self

Constructor.

msg_len is the total number of T elements to be hashed

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fn update(&mut self, data: impl AsRef<[T]>)

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fn chain_update(self, data: impl AsRef<[T]>) -> Self

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fn finalize(self) -> Result<Self::Digest, HashError>

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fn reset(&mut self)

Resets with length initialized to the current context

Object Safety§

This trait is not object safe.

Implementors§