Need ability to authenticate as "current user" without passing username/password

[GoogleCodeExporter]

I would like to be able to write code like this.
Note that I don't specify username and password. 
I want to make a request using NTLM authentication with the credentials of the 
user making the call. 
This should in theory be pretty easy to do (not easy for me though). I think 
there are some clues in this post
http://stackoverflow.com/questions/2916396/smtp-through-exchange-using-integrate
d-windows-authentication-ntlm-using-python

--- snip ---

import urllib2
from ntlm import HTTPNtlmAuthHandler

url = "http://ntlmprotectedserver/securedfile.html"
# create the NTLM authentication handler
# since we aren’t passing a password manager, use credentials
# of calling user
auth_NTLM = HTTPNtlmAuthHandler.HTTPNtlmAuthHandler()

# create and install the opener
opener = urllib2.build_opener(auth_NTLM)
urllib2.install_opener(opener)

# retrieve the result
response = urllib2.urlopen(url)
print(response.read())

Original issue reported on code.google.com by [email protected] on 28 Sep 2010 at 11:16