blob: c3264ceade7a42cf9a9eb0429fd278d0c70f9182 [file] [log] [blame]
/// The single place where we generate random material
/// for our own use. These functions never fail,
/// they panic on error.
use ring::rand::{SystemRandom, SecureRandom};
use crate::msgs::codec;
/// Fill the whole slice with random material.
pub fn fill_random(bytes: &mut [u8]) {
SystemRandom::new()
.fill(bytes)
.unwrap();
}
/// Make a Vec<u8> of the given size
/// containing random material.
pub fn random_vec(len: usize) -> Vec<u8> {
let mut v = Vec::with_capacity(len);
v.resize(len, 0u8);
fill_random(&mut v);
v
}
/// Return a uniformly random u32.
pub fn random_u32() -> u32 {
let mut buf = [0u8; 4];
fill_random(&mut buf);
codec::decode_u32(&buf)
.unwrap()
}