Function nettle_hkdf_extract

pub unsafe extern "C" fn nettle_hkdf_extract(
    mac_ctx: *mut c_void,
    update: nettle_hash_update_func,
    digest: nettle_hash_digest_func,
    digest_size: usize,
    secret_size: usize,
    secret: *const u8,
    dst: *mut u8,
)