use std::collections::HashSet;
use hkdf::Hkdf;
use sha2::{Digest, Sha256};
pub mod scrypt;
pub mod tag;
pub mod tagpq;
pub mod x25519;
fn static_tag(pk: &[u8]) -> [u8; 4] {
Sha256::digest(pk)[..4]
.try_into()
.expect("length is correct")
}
/// Derives a tag for the tagged age recipient formats.
fn stanza_tag(ikm: &[u8], salt: &str) -> [u8; 4] {
let (tag, _) = Hkdf::<Sha256>::extract(Some(salt.as_bytes()), ikm);
tag[..4].try_into().expect("correct length")
}
fn label_pq_only() -> HashSet<String> {
["postquantum".into()].into_iter().collect()
}