Struct mrkl::digest::DigestHasher

pub struct DigestHasher<D, Nh = DefaultNodeHasher<D>> where
    D: FixedOutput,
    Nh: NodeHasher<HashOutput = GenericArray<u8, D::OutputSize>>,  { /* fields omitted */ }

Provides a cryptographic hash function implementation for hashing Merkle trees with byte order sensitive input.

The hash function implementation is defined by the first type parameter. As the byte order may be important for generic input values, that type has to implement digest_hash::EndianInput.

The implementation of a concatenated hash over node's children is defined by the second type parameter. The default choice should be good enough unless a specific way to derive concatenated hashes is required.

Methods

impl<D, Nh> DigestHasher<D, Nh> where
    D: FixedOutput,
    Nh: NodeHasher<HashOutput = GenericArray<u8, D::OutputSize>>,
    Nh: Default, 

fn new() -> Self

Constructs a new instance of the hash extractor.

impl<D, Nh> DigestHasher<D, Nh> where
    D: FixedOutput,
    Nh: NodeHasher<HashOutput = GenericArray<u8, D::OutputSize>>, 

fn with_node_hasher(node_hasher: Nh) -> Self

Constructs a new instance of the hash extractor taking an instance of the node hasher.

Trait Implementations

impl<D, Nh> Default for DigestHasher<D, Nh> where
    D: FixedOutput,
    Nh: NodeHasher<HashOutput = GenericArray<u8, D::OutputSize>>,
    Nh: Default, 

fn default() -> Self

Returns the "default value" for a type.

impl<D, Nh> Clone for DigestHasher<D, Nh> where
    D: FixedOutput,
    Nh: NodeHasher<HashOutput = GenericArray<u8, D::OutputSize>>,
    Nh: Clone, 

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<D, Nh> Debug for DigestHasher<D, Nh> where
    D: EndianInput + FixedOutput,
    Nh: NodeHasher<HashOutput = GenericArray<u8, D::OutputSize>>,
    Nh: Debug, 

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

Formats the value using the given formatter.

impl<D, Nh, In: ?Sized> Hasher<In> for DigestHasher<D, Nh> where
    In: Hash,
    D: Default,
    D: EndianInput + FixedOutput,
    Nh: NodeHasher<HashOutput = GenericArray<u8, D::OutputSize>>, 

fn hash_input(&self, input: &In) -> Self::HashOutput

Hash an element of the input data.

impl<D, Nh> NodeHasher for DigestHasher<D, Nh> where
    D: FixedOutput,
    Nh: NodeHasher<HashOutput = GenericArray<u8, D::OutputSize>>, 

type HashOutput = GenericArray<u8, D::OutputSize>

The output of the hash function.

fn hash_children<'a, L>(
    &'a self,
    iter: Children<'a, Self::HashOutput, L>
) -> Self::HashOutput

Hash a sequence of child nodes to produce the parent hash value.