Struct PerfectRng

pub struct PerfectRng { /* private fields */ }

Implementations

impl PerfectRng

pub fn new(range: u64, seed: u64, rounds: usize) -> Self

Create a new perfect cipher with a specific range, seed, and rounds. Use PerfectRng::from_range to use the default seed and rounds.

• range: The number of possible values. In other words, the highest value you will try to shuffle. For example, this would be 2**32-1 for an IPv4 address.
• seed: The seed used for randomization.
• rounds: The amount of times the randomization is done, to make it more random. Recommended value is either 3 or 4, depending on your performance/quality needs.

let perfect_rng = PerfectRng::new(10, rand::random(), 4);

pub fn from_range(range: u64) -> Self

Create a new PerfectRng with a random seed and default rounds.

let perfect_rng = PerfectRng::from_range(2u64.pow(32));

pub fn shuffle(&self, m: u64) -> u64

Randomize your input.

let randomizer = PerfectRng::from_range(100);
for i in 0..100 {
    let shuffled_i = randomizer.shuffle(i);
    assert!(shuffled_i <= 100);
}

Trait Implementations

impl Debug for PerfectRng

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

Formats the value using the given formatter.

impl Default for PerfectRng

fn default() -> PerfectRng

Returns the “default value” for a type.