name : constant_time.py # This file is dual licensed under the terms of the Apache License, Version # 2.0, and the BSD License. See the LICENSE file in the root of this repository # for complete details. from __future__ import annotations import hmac def bytes_eq(a: bytes, b: bytes) -> bool: if not isinstance(a, bytes) or not isinstance(b, bytes): raise TypeError("a and b must be bytes.") return hmac.compare_digest(a, b)