Struct rand::chacha::ChaChaRng
[−]
[src]
pub struct ChaChaRng { /* fields omitted */ }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
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)
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 Copy for ChaChaRng[src]
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 Rng for ChaChaRng[src]
fn next_u32(&mut self) -> u32
rand): use rand from crates.io
Return the next random u32. Read more
fn next_u64(&mut self) -> u64
rand): use rand from crates.io
Return the next random u64. Read more
fn next_f32(&mut self) -> f32
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
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])
rand): use rand from crates.io
Fill dest with random data. Read more
fn gen<T: Rand>(&mut self) -> T
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>
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
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
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>
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>
rand): use rand from crates.io
Return a random element from values. Read more
fn shuffle<T>(&mut self, values: &mut [T])
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])
rand): use rand from crates.io
Reseed an RNG with the given seed.
fn from_seed(seed: &'a [u32]) -> ChaChaRng
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.