anubis-wormhole 1.0.0

A post-quantum secure file transfer tool based on the Magic Wormhole protocol.
Documentation 
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use hkdf::Hkdf;
use sha2::Sha512;

pub fn hkdf_extract_sha512(salt: &[u8], ikm: &[u8]) -> Vec<u8> {
    let hk = Hkdf::<Sha512>::new(Some(salt), ikm);
    let mut prk = [0u8; 64];
    hk.expand(b"prk", &mut prk).expect("HKDF expand");
    prk.to_vec()
}

pub fn hkdf_expand_sha512(prk: &[u8], info: &[u8], len: usize) -> Vec<u8> {
    let hk = Hkdf::<Sha512>::from_prk(prk).expect("valid prk");
    let mut okm = vec![0u8; len];
    hk.expand(info, &mut okm).expect("HKDF expand");
    okm
}