wsman KeyError exception with auth.contexts

[goooroooX]

Hi!

I have a code that querying some information from Windows server with pypsrp. The code works fine on all tested instances (10+) with one single exception. I have no access to that particular Windows box so troubleshooting is hardly possible.

Here is the log:

2021-02-26 15:37:32,414 ERROR    [48330] [main] Traceback (most recent call last):
  File "/opt/app-root/app/query_xxxxxx.py", line 175, in main
    exch = MainClass(server=server, port=port, username=username, password=password, ssl=ssl, auth=auth, cert_validation=cert_validation, conf=conf)
  File "base.py", line 913, in app.base.MainClass.__init__
  File "base.py", line 977, in app.base.MainClass.check_data
  File "base.py", line 1096, in app.base.MainClass.run_export
  File "/usr/local/lib/python3.6/site-packages/pypsrp/powershell.py", line 205, in __enter__
    self.open()
  File "/usr/local/lib/python3.6/site-packages/pypsrp/powershell.py", line 513, in open
    self.shell.open(options, open_content)
  File "/usr/local/lib/python3.6/site-packages/pypsrp/shell.py", line 204, in open
    option_set=options)
  File "/usr/local/lib/python3.6/site-packages/pypsrp/wsman.py", line 270, in create
    option_set, selector_set, timeout)
  File "/usr/local/lib/python3.6/site-packages/pypsrp/wsman.py", line 389, in invoke
    response = self.transport.send(xml)
  File "/usr/local/lib/python3.6/site-packages/pypsrp/wsman.py", line 734, in send
    elif self.session.auth.contexts[hostname].response_auth_header == 'kerberos':
KeyError: 'server.host.name' 

Some related details:

• the server.host.name mentioned above is the one I'm connecting to
• the code is executed from Linux box within docker image
• KRB5 is properly configured and no authentication issues here, kinit is OK

Can you please take a look on this? Any ideas where to start digging?