def __init__(self, pk):
ensure_bytes_with_length('pk', pk, self.KEY_SIZE)
self._pk = pk
def __init__(self, key):
ensure_bytes_with_length('key', key, self.KEY_SIZE)
self._key = key
def __init__(self, sk):
ensure_bytes_with_length('sk', sk, self.KEY_SIZE)
self._sk = sk