Struct DeterministicEntropySource 

pub struct DeterministicEntropySource { /* private fields */ }

Deterministic entropy source for testing

This entropy source provides deterministic bytes from KT128 (KangarooTwelve) XOF expansion via Kt128Expander and domain crate::kt128_expander::DOMAIN_LIBQ_DET_RNG.

USE CASE: This is designed for:

• Unit testing with reproducible outcomes
• Known Answer Tests (KAT) verification
• Benchmarking with consistent inputs

NOT FOR CRYPTOGRAPHIC USE: For actual cryptographic operations, use OsEntropySource or other secure entropy sources. Unpredictability is only as strong as the secrecy of the 32-byte seed.

Implementations

impl DeterministicEntropySource

pub fn new(seed: [u8; 32]) -> Self

Create a new deterministic entropy source from a 32-byte seed.

pub fn from_u64(seed: u64) -> Self

Create from a u64 test seed (SplitMix64 → 32 bytes → KT128).

Trait Implementations

impl Clone for DeterministicEntropySource

fn clone(&self) -> DeterministicEntropySource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeterministicEntropySource

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

Formats the value using the given formatter.

impl EntropySource for DeterministicEntropySource

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

Get entropy from the source

fn initialize(&mut self, config: &EntropyConfig) -> Result<()>

Initialize the entropy source

fn is_available(&self) -> bool

Check if the entropy source is available

fn quality(&self) -> f64

Get the entropy source’s quality estimate (0.0 to 1.0)

fn name(&self) -> &'static str

Get the entropy source’s name

fn source_type(&self) -> EntropySourceType

Get the entropy source’s type

fn max_entropy_per_call(&self) -> Option<usize>

Get the maximum entropy that can be obtained in one call

fn requires_initialization(&self) -> bool

Check if the entropy source requires initialization