AttributeError: 'Context' object has no attribute 'wrap_socket'

Question

I am trying to set up a Flask server that uses an OpenSSL context. However, since I moved the script on a different server, it keeps throwing the following error, no matter if I am using Python 2.7 or 3.4 and no matter which SSL method I chose (SSLv23 / TLSv1/...):

  File "/usr/lib/python3.4/threading.py", line 920, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.4/threading.py", line 868, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.4/dist-packages/werkzeug/serving.py", line 602, in inner
    passthrough_errors, ssl_context).serve_forever()
  File "/usr/local/lib/python3.4/dist-packages/werkzeug/serving.py", line 506, in make_server
    passthrough_errors, ssl_context)
  File "/usr/local/lib/python3.4/dist-packages/werkzeug/serving.py", line 450, in __init__
    self.socket = ssl_context.wrap_socket(self.socket,
AttributeError: 'Context' object has no attribute 'wrap_socket'

The according code below:

if __name__ == "__main__":
        context = SSL.Context(SSL.SSLv23_METHOD)
        context.use_privatekey_file('key.key')
        context.use_certificate_file('cert.crt')
        app.run(host='0.0.0.0', port=80, ssl_context=context, threaded=True, debug=True)

Thank you very much in advance! I am happy for any help

Solution

As of 0.10, Werkzeug doesn't support OpenSSL contexts anymore. This decision was made because it is easier to support ssl.SSLContext across Python versions. Your option to re-write this code is this one:

if __name__ == "__main__":
    context = ('cert.crt', 'key.key')
    app.run(host='0.0.0.0', port=80, ssl_context=context, threaded=True, debug=True)

See http://werkzeug.pocoo.org/docs/latest/serving/ for all possibilities.

Comments

[Florin Stingaciu]

It's important to note that the order of the crt and key in the context tuple maters.

[ierdna]

Getting this error: 'tuple' object has no attribute 'wrap_socket'