penumbra_sdk_keys/
prf.rs

1use ark_ff::PrimeField;
2
3pub fn expand(label: &'static [u8; 16], key: &[u8], input: &[u8]) -> blake2b_simd::Hash {
4    blake2b_simd::Params::new()
5        .personal(label)
6        .key(key)
7        .hash(input)
8}
9
10pub fn expand_ff<F: PrimeField>(label: &'static [u8; 16], key: &[u8], input: &[u8]) -> F {
11    F::from_le_bytes_mod_order(expand(label, key, input).as_bytes())
12}