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From: Johan Laenen <johan.laenen+cygwin AT gmail DOT com>
Subject: Re: Https proxy auth issue with git in cygwin 2.2.1
Date: Fri, 16 Oct 2015 12:26:14 +0000 (UTC)
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References: <CAFkLm6xW=5uUP+CRrmUontqPzqAZ+r4WdwjVAhP+XTvs53JmFQ AT mail DOT gmail DOT com> <20150921103100 DOT GF14466 AT dinwoodie DOT org> <loom DOT 20150925T090939-654 AT post DOT gmane DOT org> <20151005202249 DOT GM14466 AT dinwoodie DOT org>
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Adam Dinwoodie <adam <at> dinwoodie.org> writes:

> I think I've found the problem, and you're right -- Git has changed the
> way it makes the curl call.  The culprit is commit 5841520b in the
> upstream Git repository, which has the following commit message:
> 
> | http: always use any proxy auth method available
> |
> | We set CURLOPT_PROXYAUTH to use the most secure authentication
> | method available only when the user has set configuration variables
> | to specify a proxy.  However, libcurl also supports specifying a
> | proxy through environment variables.  In that case libcurl defaults
> | to only using the Basic proxy authentication method, because we do
> | not use CURLOPT_PROXYAUTH.
> |
> | Set CURLOPT_PROXYAUTH to always use the most secure authentication
> | method available, even when there is no git configuration telling us
> | to use a proxy. This allows the user to use environment variables to
> | configure a proxy that requires an authentication method different
> | from Basic.
> 
> I can't confirm this is the problem, though, as I don't have a test
> environment that uses NTLM.
> 
> Do you have the ability to either run a test version of Git I can
> produce that patches out this change, or (better) to build Git yourself
> without this patch to see if that is indeed the change that's causing
> the problem?
> 

Hi There,

I can into the exact same problem after upgrading to the latest cygwin version. 

So, following your advice, I took git-2.6.1.tar.gz from github, untarred,
and modified http.c:

$ diff git-2.6.1/http.c t/git-2.6.1/http.c
466,467c466,468
<     if (curl_http_proxy) {
<         curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
---
>       if (curl_http_proxy) {
>               curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
>       }
469c470
<         curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
---
>       curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
471d471
<     }

One make configure, ./configure, make and make install I can confirm that
unpatching the change undoes the problem :)

> Adam
> 
> 


Johan


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