Ka-Lok Fung created HTTPCLIENT-1540:
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             Summary: Support delegated credentials (ISC_REQ_DELEGATE) via 
ClientWinAuth
                 Key: HTTPCLIENT-1540
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1540
             Project: HttpComponents HttpClient
          Issue Type: Improvement
          Components: HttpClient
    Affects Versions: 4.4 Alpha1
         Environment: Windows
            Reporter: Ka-Lok Fung


If you use this Wikipedia graphic as a reference, 
http://en.wikipedia.org/wiki/Kerberos_(protocol)#mediaviewer/File:Kerberos.svg, 
the current implementation in HttpClient 4.4alpha1 does the first (red) and 
last (green) steps but it doesn't do the middle one (middle). By adding a 
parameter, it won't skip out on the middle step (where the Windows LSA will ask 
the Windows domain controller to generate a ticket-granting-ticket for the 
requested service).

In {{WindowsNegotiateScheme.getToken()}}, the change would be to update
{{Sspi.ISC_REQ_CONNECTION}} to {{Sspi.ISC_REQ_CONNECTION | 
Sspi.ISC_REQ_DELEGATE}}.



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