[tor-bugs] #26689 [Core Tor/Tor]: No support for an upstream proxy that uses NTLM authentication

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#26689: No support for an upstream proxy that uses NTLM authentication
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     Reporter:  irl           |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 Many corporate/enterprise environments still have proxies that use NTLM
 authentication also sometimes referred to as the NT challenge/response
 (NTCR) scheme. As far as I can tell, this is old Microsoft products that
 just refuse to die.

 The following document explains the protocol:

 https://www.innovation.ch/personal/ronald/ntlm.html

 There does appear to be a C library implementing the protocol at:

 http://cntlm.sourceforge.net/

 There is also a Python 1.x implementation at:

 http://ntlmaps.sourceforge.net/

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26689>
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