Crate sc_drbg 

A Rust implementation of the Subset Counter-Based Deterministic Random Bit Generator (SC_DRBG).

Provides a deterministic random bit generator that maintains an array of seed material in its internal state (rather than a single seed), allowing each output to be generated from a configurable subset of array elements.

Features

• Support for 32 and 64 bit unsigned integers.
• Configurable endianness.
• Can specify the number of elements (1 to N) used to produce each output.
• Commitment of array elements to their positions, lengths, and contents.
• Configurable rounds of mixing for entropy diffusion across elements.
• Provides forward security through state evolution.
• Implements RngCore for compatibility with the Rust random ecosystem.
• Secure memory zeroization on drop.

Example

use hex_literal::hex;
use rand_core::RngCore;
use sc_drbg::Drbg;
use sha3::Sha3_256;

fn main() {
    let arr = vec![
        hex!("456E64204F662054686520576F726C642053756E").to_vec(),
        hex!("556E6D616B65207468652057696C64204C69676874").to_vec(),
        hex!("536166652050617373616765").to_vec(),
        hex!("747261636B6572706C61747A").to_vec(),
        hex!("3635646179736F66737461746963").to_vec(),
    ];
    let context = "some-random-application";

    let mut drbg = Drbg::<Sha3_256, u32>::new_le(&arr, Some(context), true)
        .expect("Should create new SC_DRBG instance");

    let num = drbg.next_u32();
    assert_eq!(num, 4076030162);
}

Structs

Drbg

Structure representing SC_DRBG, a Subset Counter-Based Deterministic Random Bit Generator.

Enums

DrbgError

Enum that represents all possible errors that can be returned by Drbg constructors.

Endian

Byte order for integer encoding and decoding.

Traits

UnsignedInt

A trait for unsigned integers, providing common arithmetic and byte conversion functionality.