Function scrypt

pub fn scrypt(
    out_len: usize,
    passphrase: &str,
    salt: &[u8],
    n: usize,
    r: usize,
    p: usize,
) -> Result<Vec<u8>>

Scrypt key derivation

The n, r, p parameters control how much time and memory is used. As of 2018, n = 32768, r = 8, p = 1 seems sufficient.

Examples

let mut rng = botan::RandomNumberGenerator::new().unwrap();
let salt = rng.read(10).unwrap();
let n = 32768;
let r = 8;
let p = 1;
let key = botan::scrypt(32, "passphrase", &salt, n, r, p).unwrap();
assert_eq!(key.len(), 32);