Function botan::kdf

pub fn kdf(
    algo: &str, 
    output_len: usize, 
    secret: &[u8], 
    salt: &[u8], 
    label: &[u8]
) -> Result<Vec<u8>>

Key derivation function

Produces a KDF output of the specified size when run over the provided secret, salt, and label inputs

Examples

let salt = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
let label = vec![0x42, 0x6F, 0x62];
let secret = vec![0x4E, 0x6F, 0x74, 0x20, 0x54, 0x65, 0x6C, 0x6C, 0x69, 0x6E, 0x67];
let v = botan::kdf("HKDF(SHA-256)", 23, &secret, &salt, &label).unwrap();
assert_eq!(v.len(), 23);