Struct asuran_chunker::buzhash::BuzHash

pub struct BuzHash { /* fields omitted */ }

Settings for a BuzHash Chunker

Uses a randomized lookup table derived from a nonce provided by the repository key material, to help provide resistance against a chunk size based fingerprinting attack, for users who are concerned about such a thing.

This is a very tenuous mitigation for such an attack, borrowed from borg, and is, fundamentally, a temporary work around. The "correct" solution is to implement a better repository structure, that does not leak chunk sizes.

Methods

impl BuzHash

pub fn new(nonce: u64, window_size: u32, mask_bits: u32) -> BuzHash

impl BuzHash

pub fn with_default(nonce: u64) -> BuzHash

Trait Implementations

impl Chunker for BuzHash

type Chunks = BuzHashChunker

The return type of the functions in this trait is an iterator over the chunks of their input.

fn chunk_boxed(&self, read: Box<dyn Read + Send + 'static>) -> Self::Chunks

Core function, takes a boxed owned Read and produces an iterator of Vec over it

fn chunk<R: Read + Send + 'static>(&self, read: R) -> Self::Chunks

Convenience function that boxes a bare Read for you, and passes it to chunk_boxed

fn chunk_slice<R: AsRef<[u8]> + Send + 'static>(&self, slice: R) -> Self::Chunks

Convenience function that boxes an AsRef<u8> wrapped in a cursor and passes it to chunk_boxed. Implementations are encouraged to overwrite when sensible.

impl Clone for BuzHash

fn clone(&self) -> BuzHash

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for BuzHash