Source code for cryptography.hazmat.primitives.constant_time

# 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 absolute_import, division, print_function

import hmac


[docs]def bytes_eq(a, b):
    if not isinstance(a, bytes) or not isinstance(b, bytes):
        raise TypeError("a and b must be bytes.")

    return hmac.compare_digest(a, b)