Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/cryptography/hazmat/backends/openssl/utils.py: 92%

1# This file is dual licensed under the terms of the Apache License, Version 

2# 2.0, and the BSD License. See the LICENSE file in the root of this repository 

3# for complete details. 

4 

5from __future__ import annotations 

6 

7from cryptography.hazmat.primitives import hashes 

8from cryptography.hazmat.primitives.asymmetric.utils import Prehashed 

9 

10 

11def _calculate_digest_and_algorithm( 

12 data: bytes, 

13 algorithm: Prehashed | hashes.HashAlgorithm, 

14) -> tuple[bytes, hashes.HashAlgorithm]: 

15 if not isinstance(algorithm, Prehashed): 

16 hash_ctx = hashes.Hash(algorithm) 

17 hash_ctx.update(data) 

18 data = hash_ctx.finalize() 

19 else: 

20 algorithm = algorithm._algorithm 

21 

22 if len(data) != algorithm.digest_size: 

23 raise ValueError( 

24 "The provided data must be the same length as the hash " 

25 "algorithm's digest size." 

26 ) 

27 

28 return (data, algorithm)