Struct BytesRng 

pub struct BytesRng { /* private fields */ }

An RNG that reads from a byte buffer, falling back to a seeded RNG when exhausted.

This is useful for fuzzing where you want the fuzzer to control randomness through byte mutations. The raw bytes are consumed sequentially, and when exhausted, a fallback RNG (seeded from a hash of the buffer) provides additional randomness deterministically.

Implementations

impl BytesRng

pub fn new(bytes: Vec<u8>) -> Self

Creates a new BytesRng from a byte buffer.

All bytes are consumed sequentially as output. When exhausted, a fallback RNG (seeded from a hash of the entire buffer) provides additional randomness.

pub const fn remaining(&self) -> usize

Returns the number of raw bytes remaining before fallback.

pub fn consumed(&self) -> usize

Returns the total number of bytes consumed from the raw buffer.

Trait Implementations

impl RngCore for BytesRng

fn next_u32(&mut self) -> u32

Return the next random u32.

fn next_u64(&mut self) -> u64

Return the next random u64.

fn fill_bytes(&mut self, dest: &mut [u8])

Fill dest with random data.

fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>

Fill dest entirely with random data.

impl CryptoRng for BytesRng