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From Aaron Turner <synfina...@gmail.com>
Subject Re: Cannot negotiate authentication mechanisim
Date Sat, 03 Apr 2010 16:33:26 GMT
On Sat, Apr 3, 2010 at 9:16 AM, Aaron Turner <synfinatic@gmail.com> wrote:
> On Sat, Apr 3, 2010 at 12:30 AM, Daniel Shahaf <d.s@daniel.shahaf.name> wrote:
>> Aaron Turner wrote on Fri, 2 Apr 2010 at 18:48 -0700:
>>> So this works fine for me from Linux and TortioseSVN, but from
>>> Windows/Cygwin when I try to check out my repo
>>> (svn://svn.synfin.net/tcpreplay) I get an error "svn: Cannot negotiate
>>> authentication mechanisim".  I'm using SASL auth on the backend...
>>>
>>
>> That server only offers DIGEST-MD5 authentication.  Natively, Subversion
>> only knows CRAM-MD5 (if the comments in the source are still accurate;
>> `grep MD5 subversion/{svnserve,libsvn_ra_svn}/*`).  So I guess you need an
>> svn binary compiled/configured for SASL support, or to configure the
>> server to allow CRAM-MD5.
>
> So: svn --version on the client says:
>
> * ra_svn : Module for accessing a repository using the svn network protocol.
>  - with Cyrus SASL authentication
>  - handles 'svn' scheme
>
> So I thought that meant it should support things like digest-md5.  Is
> there a way to see what auth methods it does support?
>
> The reason I forced digest-md5 auth was since cram-md5 doesn't support
> data encryption.  Probably not the end of the world though.
>

FYI, after digging some more, I found the problem... it wasn't
cram-md5 vs. digest-md5... client supports both.  The issue was the
server requiring encryption (min-encryption=128) and the client didn't
support it.  Probably would be nice if the error message was a little
more specific to this problem.

-- 
Aaron Turner
http://synfin.net/         Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
    -- Benjamin Franklin
"carpe diem quam minimum credula postero"

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