CODEWITHSUNDEEP
pythonpython-3.xpython-2.7cryptography
gradole
gradole

Reputation: 99

python's cryptography throwing AttributeError: 'int' object has no attribute 'value'

I'm trying to execute the following code:

from cryptography.fernet import Fernet
key = Fernet.generate_key()
cipher_suite = Fernet(key)
cipher_text = cipher_suite.encrypt(b"A really secret message. Not for prying eyes.")
plain_text = cipher_suite.decrypt(cipher_text)
print plain_text

Getting:

C:\Python27\python.exe E:/PycharmProjects/my_project/utils/encryption.py
Traceback (most recent call last):
  File "E:/PycharmProjects/my_project/utils/encryption.py", line 3, in <module>
    cipher_suite = Fernet(key)
  File "C:\Python27\lib\site-packages\cryptography\fernet.py", line 32, in __init__
    backend = default_backend()
  File "C:\Python27\lib\site-packages\cryptography\hazmat\backends\__init__.py", line 15, in default_backend
    from cryptography.hazmat.backends.openssl.backend import backend
  File "C:\Python27\lib\site-packages\cryptography\hazmat\backends\openssl\__init__.py", line 7, in <module>
    from cryptography.hazmat.backends.openssl.backend import backend
  File "C:\Python27\lib\site-packages\cryptography\hazmat\backends\openssl\backend.py", line 16, in <module>
    from cryptography import utils, x509
  File "C:\Python27\lib\site-packages\cryptography\x509\__init__.py", line 8, in <module>
    from cryptography.x509.base import (
  File "C:\Python27\lib\site-packages\cryptography\x509\base.py", line 16, in <module>
    from cryptography.x509.extensions import Extension, ExtensionType
  File "C:\Python27\lib\site-packages\cryptography\x509\extensions.py", line 24, in <module>
    from cryptography.x509.general_name import GeneralName, IPAddress, OtherName
  File "C:\Python27\lib\site-packages\cryptography\x509\general_name.py", line 18, in <module>
    from cryptography.x509.name import Name
  File "C:\Python27\lib\site-packages\cryptography\x509\name.py", line 28, in <module>
    _ASN1_TYPE_TO_ENUM = dict((i.value, i) for i in _ASN1Type)
  File "C:\Python27\lib\site-packages\cryptography\x509\name.py", line 28, in <genexpr>
    _ASN1_TYPE_TO_ENUM = dict((i.value, i) for i in _ASN1Type)
AttributeError: 'int' object has no attribute 'value'

Process finished with exit code 1

The file path is: my_project/utils/encryption.py

Running the same code outside the 'utils' package or in python console works fine. What could be the issue?

Upvotes: 0

Views: 1354

Answers (2)

Jonathan Gagne
Jonathan Gagne

Reputation: 4379

The cryptography code needs the Python 3 enum: https://pypi.python.org/pypi/enum34 . That is why you got that issue.

I suggest to verify if your version is right and not replaced by another module as well.

Upvotes: 2

gradole
gradole

Reputation: 99

The issue was that I had a module named enum.py along with the cryptography code (same package). cryptography tried to use it instead of enum34. Renaming the 'enum.py' to something else solved it.

Upvotes: 0

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