Struct Blake3 

pub struct Blake3 { /* private fields */ }

Streaming BLAKE3 hasher / XOF.

Feed input with update; finalize with finalize (32 bytes) or finalize_xof (arbitrary length). BLAKE3 spec §2.3.

Implementations

impl Blake3

pub fn new() -> Blake3

Unkeyed BLAKE3 hasher (default mode). BLAKE3 spec §2.1.

pub fn new_keyed(key: &[u8; 32]) -> Blake3

Keyed BLAKE3 (keyed_hash) — a PRF / MAC over a 32-byte key. The key replaces the IV as the chaining state. BLAKE3 spec §2.1.

pub fn new_derive_key(context: &str) -> Blake3

derive_key KDF context phase. The context string is hashed under the DERIVE_KEY_CONTEXT flag; the resulting 32-byte value becomes the key for the DERIVE_KEY_MATERIAL phase (fed via update). BLAKE3 spec §2.1 / §5.

pub fn update(&mut self, input: &[u8])

Absorb input. May be called repeatedly. BLAKE3 spec §2.3.

pub fn finalize_xof(&self, seek: u64, out: &mut [u8])

Write out.len() bytes of XOF output starting at byte offset seek. Each root re-compression yields one 64-byte output block; a seek that does not fall on a block boundary is handled by skipping the leading bytes of the first block. BLAKE3 spec §2.3.

Trait Implementations

impl Clone for Blake3

fn clone(&self) -> Blake3

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for Blake3

fn default() -> Blake3

Returns the “default value” for a type.

impl Digest for Blake3

const OUTPUT_LEN: usize = OUT_LEN

The digest length in octets.

const BLOCK_LEN: usize = BLOCK_LEN

The internal block size in octets — the rate for the Merkle–Damgård / sponge construction. Needed by keyed constructions such as HMAC.

fn new() -> Blake3

Create a fresh hasher.

fn update(&mut self, data: &[u8])

Absorb a chunk of input. May be called repeatedly.

fn finalize(self, out: &mut [u8])

Consume the hasher and write the digest into out.

fn digest(data: &[u8], out: &mut [u8])

One-shot convenience: update(data) then finalize(out).