AttributeError: 'DSAPublicNumbers' object has no attribute 'e'

[postmodern]

Steps to Reproduce

1. pip3 install -U nassl==1.1.3 cryptography==2.2.2 sslyze==1.4.1
2. sslyze --certinfo --regular server.spruceland.ca:30333 server.spruceland.ca:30334 server.spruceland.ca:33899

Expected Result

Exits

Actual Result

Traceback (most recent call last):
  File "/home/postmodern/.local/bin/sslyze", line 11, in 
    sys.exit(main())
  File "/home/postmodern/.local/lib/python3.6/site-packages/sslyze/__main__.py", line 121, in main
    output_hub.server_scan_completed(CompletedServerScan(server_info, plugin_result_list))
  File "/home/postmodern/.local/lib/python3.6/site-packages/sslyze/cli/output_hub.py", line 67, in server_scan_completed
    out_generator.server_scan_completed(server_scan_result)
  File "/home/postmodern/.local/lib/python3.6/site-packages/sslyze/cli/console_output.py", line 87, in server_scan_completed
    for line in plugin_result.as_text():
  File "/home/postmodern/.local/lib/python3.6/site-packages/sslyze/plugins/certificate_info_plugin.py", line 380, in as_text
    text_output.extend(self._get_basic_certificate_text())
  File "/home/postmodern/.local/lib/python3.6/site-packages/sslyze/plugins/certificate_info_plugin.py", line 697, in _get_basic_certificate_text
    text_output.append(self._format_field('Exponent:', '{0} (0x{0:x})'.format(public_key.public_numbers().e)))
AttributeError: 'DSAPublicNumbers' object has no attribute 'e'

and hangs.

Additional Info

Python: 3.6.5
nassl: 1.1.3
cryptography: 2.2.2
sslyze: 1.4.1

[jsf9k]

I confirmed that I'm seeing the same behavior.

[postmodern]

@nabla-c0d3 I'm still getting this with sslyze 1.4.3, cryptography 2.3.1, nassl 1.1.3.

$ sslyze --certinfo --xml_out=sslyze.xml mail.proptaxappeal.net:4044

Traceback (most recent call last):
  File "/home/postmodern/sslyze/bin/sslyze", line 11, in <module>
    sys.exit(main())
  File "/home/postmodern/sslyze/lib/python3.6/site-packages/sslyze/__main__.py", line 121, in main
    output_hub.server_scan_completed(CompletedServerScan(server_info, plugin_result_list))
  File "/home/postmodern/sslyze/lib/python3.6/site-packages/sslyze/cli/output_hub.py", line 67, in server_scan_completed
    out_generator.server_scan_completed(server_scan_result)
  File "/home/postmodern/sslyze/lib/python3.6/site-packages/sslyze/cli/xml_output.py", line 93, in server_scan_completed
    server_scan_node.append(plugin_result.as_xml())
  File "/home/postmodern/sslyze/lib/python3.6/site-packages/sslyze/plugins/certificate_info_plugin.py", line 596, in as_xml
    for cert_xml in self._certificate_chain_to_xml(self.certificate_chain):
  File "/home/postmodern/sslyze/lib/python3.6/site-packages/sslyze/plugins/certificate_info_plugin.py", line 566, in _certificate_chain_to_xml
    key_attrs['exponent'] = str(public_key.public_numbers().e)
AttributeError: 'DSAPublicNumbers' object has no attribute 'e'

[nabla-c0d3]

I tried just now with v2.0.0:

python -m sslyze --certinfo server.spruceland.ca:30333 server.spruceland.ca:30334 server.spruceland.ca:33899

It worked fine.