[SOLVED] AttributeError: module 'lib' has no attribute 'Cryptography_HAS_TLSEXT_HOSTNAME'

sse450 · 12-21-2020, 09:51 AM

Following an update on my CentOS 8, "certbot renew" cannot run and throws the following error:

Code:

Traceback (most recent call last):
  File "/usr/bin/certbot", line 11, in <module>
    load_entry_point('certbot==1.10.1', 'console_scripts', 'certbot')()
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 476, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2700, in load_entry_point
    return ep.load()
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2318, in load
    return self.resolve()
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2324, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3.6/site-packages/certbot/main.py", line 2, in <module>
    from certbot._internal import main as internal_main
  File "/usr/lib/python3.6/site-packages/certbot/_internal/main.py", line 10, in <module>
    import josepy as jose
  File "/usr/lib/python3.6/site-packages/josepy/__init__.py", line 41, in <module>
    from josepy.interfaces import JSONDeSerializable
  File "/usr/lib/python3.6/site-packages/josepy/interfaces.py", line 7, in <module>
    from josepy import errors, util
  File "/usr/lib/python3.6/site-packages/josepy/util.py", line 7, in <module>
    import OpenSSL
  File "/usr/lib/python3.6/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import crypto, SSL
  File "/usr/lib/python3.6/site-packages/OpenSSL/SSL.py", line 669, in <module>
    _lib.Cryptography_HAS_TLSEXT_HOSTNAME, "SNI not available"
AttributeError: module 'lib' has no attribute 'Cryptography_HAS_TLSEXT_HOSTNAME'

I have no idea what the culprit is. Also, probably related with this issue, any dnf command gives a warning as first line:

Code:

Failed loading plugin "spacewalk": module 'lib' has no attribute 'Cryptography_HAS_TLSEXT_HOSTNAME'

I would appreciate any help.

Thank you.

pan64 · 12-21-2020, 12:15 PM

I guess you need to upgrade that lib [python] module too. And probably others.

sse450 · 12-21-2020, 12:40 PM

Quote:

Originally Posted by pan64

I guess you need to upgrade that lib [python] module too. And probably others.

Could you please elaborate? Which module should I upgrade? "dnf update" says nothing to upgrade.

Thank you for replying.

pan64 · 12-21-2020, 12:52 PM

probably: pyOpenSSL is the name of the package.
but you can look for the error message on the net and you will see some alternatives, like:
pip3 install -U cryptography

sse450 · 12-21-2020, 12:59 PM

Quote:

Originally Posted by pan64

probably: pyOpenSSL is the name of the package.
but you can look for the error message on the net and you will see some alternatives, like:
pip3 install -U cryptography

Dear pan64, that was it. All fixed.

You saved my life. I am grateful.

pan64 · 12-21-2020, 03:53 PM

good to head that.
If your problem is solved please mark the thread solved.
Also if you wish to say thanks just click on yes.