| # 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) | |