Struct rand::chacha::ChaChaRng [] [src]

pub struct ChaChaRng {
    // some fields omitted
}
Unstable (rand)

: use rand from crates.io

A random number generator that uses the ChaCha20 algorithm [1].

The ChaCha algorithm is widely accepted as suitable for cryptographic purposes, but this implementation has not been verified as such. Prefer a generator like OsRng that defers to the operating system for cases that need high security.

[1]: D. J. Bernstein, ChaCha, a variant of Salsa20

Methods

impl ChaChaRng
[src]

fn new_unseeded() -> ChaChaRng

Unstable (rand)

: use rand from crates.io

Create an ChaCha random number generator using the default fixed key of 8 zero words.

fn set_counter(&mut self, counter_low: u64, counter_high: u64)

Unstable (rand)

: use rand from crates.io

Sets the internal 128-bit ChaCha counter to a user-provided value. This permits jumping arbitrarily ahead (or backwards) in the pseudorandom stream.

Since the nonce words are used to extend the counter to 128 bits, users wishing to obtain the conventional ChaCha pseudorandom stream associated with a particular nonce can call this function with arguments 0, desired_nonce.

Trait Implementations

impl Clone for ChaChaRng
[src]

fn clone(&self) -> ChaChaRng

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)
1.0.0

Performs copy-assignment from source. Read more

impl Copy for ChaChaRng
[src]

impl Rng for ChaChaRng
[src]

fn next_u32(&mut self) -> u32

Unstable (rand)

: use rand from crates.io

Return the next random u32. Read more

fn next_u64(&mut self) -> u64

Unstable (rand)

: use rand from crates.io

Return the next random u64. Read more

fn next_f32(&mut self) -> f32

Unstable (rand)

: use rand from crates.io

Return the next random f32 selected from the half-open interval [0, 1). Read more

fn next_f64(&mut self) -> f64

Unstable (rand)

: use rand from crates.io

Return the next random f64 selected from the half-open interval [0, 1). Read more

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

Unstable (rand)

: use rand from crates.io

Fill dest with random data. Read more

fn gen<T: Rand>(&mut self) -> T

Unstable (rand)

: use rand from crates.io

Return a random value of a Rand type.

fn gen_iter<'a, T: Rand>(&'a mut self) -> Generator<'a, T, Self>

Unstable (rand)

: use rand from crates.io

Return an iterator that will yield an infinite number of randomly generated items. Read more

fn gen_range<T: PartialOrd + SampleRange>(&mut self, low: T, high: T) -> T

Unstable (rand)

: use rand from crates.io

Generate a random value in the range [low, high). Read more

fn gen_weighted_bool(&mut self, n: usize) -> bool

Unstable (rand)

: use rand from crates.io

Return a bool with a 1 in n chance of true

fn gen_ascii_chars<'a>(&'a mut self) -> AsciiGenerator<'a, Self>

Unstable (rand)

: use rand from crates.io

Return an iterator of random characters from the set A-Z,a-z,0-9.

fn choose<'a, T>(&mut self, values: &'a [T]) -> Option<&'a T>

Unstable (rand)

: use rand from crates.io

Return a random element from values. Read more

fn shuffle<T>(&mut self, values: &mut [T])

Unstable (rand)

: use rand from crates.io

Shuffle a mutable slice in place.

impl<'a> SeedableRng<&'a [u32]> for ChaChaRng
[src]

fn reseed(&mut self, seed: &'a [u32])

Unstable (rand)

: use rand from crates.io

Reseed an RNG with the given seed.

fn from_seed(seed: &'a [u32]) -> ChaChaRng

Unstable (rand)

: use rand from crates.io

Create a ChaCha generator from a seed, obtained from a variable-length u32 array. Only up to 8 words are used; if less than 8 words are used, the remaining are set to zero.