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use smallrand::{ChaCha12, DefaultEntropy, Rng};
use somethings::auth::Base58Id;
const BASE58: &'static [u8] = b"123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
pub trait RandomId {
fn rand() -> Self;
}
impl<const N: usize> RandomId for Base58Id<N> {
fn rand() -> Self {
unsafe { Self::new_unchecked(random_base58()) }
}
}
/// Random Base58 string, `count` characters long, using OsRng which is assumed
/// to be secure
/// > assumed that system always provides high-quality cryptographically secure random data
fn random_base58<const N: usize>() -> [u8; N] {
let mut buffer = [0u8; N];
// Explicitly using ChaCha12 here because StdRng is not garunteed to be
// cryptographically secure
let mut entropy = DefaultEntropy::new();
let mut rng = ChaCha12::from_entropy(&mut entropy);
buffer
.iter_mut()
.for_each(|b| *b = BASE58[rng.range(0..BASE58.len())]);
buffer
}
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