/usr/lib/python3/dist-packages/cryptography/hazmat/backends/openssl/utils.py is in python3-cryptography 2.1.4-1ubuntu1.1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | # 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 warnings
from cryptography import utils
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric.utils import Prehashed
def _calculate_digest_and_algorithm(backend, data, algorithm):
if not isinstance(algorithm, Prehashed):
hash_ctx = hashes.Hash(algorithm, backend)
hash_ctx.update(data)
data = hash_ctx.finalize()
else:
algorithm = algorithm._algorithm
if len(data) != algorithm.digest_size:
raise ValueError(
"The provided data must be the same length as the hash "
"algorithm's digest size."
)
return (data, algorithm)
def _check_not_prehashed(signature_algorithm):
if isinstance(signature_algorithm, Prehashed):
raise TypeError(
"Prehashed is only supported in the sign and verify methods. "
"It cannot be used with signer or verifier."
)
def _warn_sign_verify_deprecated():
warnings.warn(
"signer and verifier have been deprecated. Please use sign "
"and verify instead.",
utils.PersistentlyDeprecated,
stacklevel=3
)
|