Struct mrkl::digest::ByteDigestHasher

pub struct ByteDigestHasher<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 slice convertible input.

The hash function implementation is defined by the first type parameter. In contrast to the more generic DigestHasher, the parameter type is bound by bytestream-oriented digest::Input, so any cryptographic digest function implementations conformant to this trait, plus digest::FixedOutput and Default, are directly usable.

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> ByteDigestHasher<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> ByteDigestHasher<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 ByteDigestHasher<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 ByteDigestHasher<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 ByteDigestHasher<D, Nh> where
    D: 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 ByteDigestHasher<D, Nh> where
    In: AsRef<[u8]>,
    D: Default,
    D: Input + 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 ByteDigestHasher<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.