[ww-devel] The library browser not updating problem

Wed Aug 27 14:45:07 EDT 2014

Arnie,

We think might have a general solution, and you might be in the best
position to test it. In line 143 of WebworkClient.pm could you put

ssl_opts => { verify_hostname => 0 }

inside the ->proxy() bit.  So I think it should look like

-> proxy(($self->url).'/'.REQUEST_URI,ssl_opts => { verify_hostname => 0 }
);

The ssl_opts should get passed to LWP::UserAgent and maybe disable the
hostname verification for the web service calls.

Jason

On Wed, Aug 27, 2014 at 11:34 AM, Arnold Pizer <apizer at math.rochester.edu>
wrote:

> Thanks.  After sending the email, I realized that the problem wasn't with
> the browser but figured someone with a deeper understanding would respond.
>
> When we figure this out, it would be good if we could make a configuration
> option that  (1) disables hostname verification or (2) does something
> else to make this problem easier to solve.
>
> Arnie
>
>
> On Wed, Aug 27, 2014 at 2:19 PM, Jason Aubrey <aubreyja at gmail.com> wrote:
>
>> I'll need to track down who really needs the cert, but in this case it's
>> not the browser.  I *think* it's LWP::UserAgent via LWP::Protocol::https.
>> You can see here
>>
>>
>> http://search.cpan.org/~mschilli/LWP-Protocol-https-6.06/lib/LWP/Protocol/https.pm
>> <https://urldefense.proofpoint.com/v1/url?u=http://search.cpan.org/~mschilli/LWP-Protocol-https-6.06/lib/LWP/Protocol/https.pm&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=qcv1sUmY2mmPdAagwB7DjEHK%2FmPDlw6Qt7YtABKv6do%3D%0A&s=694e0ff4bb49d7042a44336317f7c7cc829d5d813697e43c845370e10f27db8d>
>>
>> It's description of how ssl requests can fail (which sounds like how ours
>> are failing.)  So, the deeper solution might be to fix it here by disabling
>> the check:
>>
>> If hostname verification is requested by LWP::UserAgent's ssl_opts, and
>>> neither SSL_ca_file nor SSL_ca_path is set, then SSL_ca_file is implied
>>> to be the one provided by Mozilla::CA. If the Mozilla::CA module isn't
>>> available SSL requests will fail. Either install this module, set up an
>>> alternative SSL_ca_file or disable hostname verification
>>>
>>
>> That's if I'm right about who is complaining.
>>
>> Jason
>>
>>
>>
>> On Wed, Aug 27, 2014 at 11:08 AM, Arnold Pizer <apizer at math.rochester.edu
>> > wrote:
>>
>>> Hi John et all,
>>>
>>> I'm pretty sure I'm having the same problem.  When I look at things
>>> following Matt's suggestion, I see that the last module called is instructorXMLHandler.pm
>>> and I see the error msg
>>> Errors: 500 Can't connect to 192.168.56.101:443
>>> <https://urldefense.proofpoint.com/v1/url?u=http://192.168.56.101:443&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=qcv1sUmY2mmPdAagwB7DjEHK%2FmPDlw6Qt7YtABKv6do%3D%0A&s=e09084ada64c076fd5495663842d43b8ab6e007ddf6f5804a79eb17d6621ab9a>
>>> (certificate verify failed) at /opt/webwork/webwork2/lib/WebworkClient.pm
>>> line 158. End Errors
>>>
>>> My problem is that I'm using a selfsigned certificate for testing.  So I
>>> don't think creating a self signed SSLCA certificate alone will solve the
>>> problem.  I think I should be able to get the browser to trust the
>>> certificate and if this works it will be OK as long as only instructors
>>> have this problem.  Are there any things that students do (or will do) that
>>> will bring up similar problems?  If so, the option of using self signed
>>> certificates will have to be abandoned.
>>>
>>> If anyone has gotten a browser to trust a self signed certificate or can
>>> point me to a good reference, I would appreciate the hint.  There seem to
>>> be quite a few references, but I haven't found one that works yet.  At
>>> least now I know the problem is really with the SSL certificate.
>>>
>>> Arnie
>>>
>>>
>>> On Wed, Aug 27, 2014 at 11:50 AM, John Jones <jj at asu.edu> wrote:
>>>
>>>> Can someone write a version of this explanation a la an apache for
>>>> dummies?
>>>>
>>>> Arnie, can you check to see if this fixes the problem you encountered
>>>> during mathfest?
>>>>
>>>> John
>>>>
>>>>
>>>>
>>>> On Wed, Aug 27, 2014 at 8:40 AM, Jason Aubrey <aubreyja at gmail.com>
>>>> wrote:
>>>>
>>>>> Thanks Matt - that worked!
>>>>>
>>>>> Jason
>>>>>
>>>>>
>>>>> On Tue, Aug 26, 2014 at 4:56 PM, Matt Haught <matt_haught at ncsu.edu>
>>>>> wrote:
>>>>>
>>>>>> Same problem here on our devel server but not our production. I have
>>>>>> been scratching my head with it today.  Our devel server also uses the
>>>>>> incommon certs while the production is using godaddy from before we
>>>>>> could get incommon.  So that got me thinking...  I have something for
>>>>>> you to try that appears to have worked for us.
>>>>>>
>>>>>> Add a SSLCACertificateFile apache conf line and have it use the
>>>>>> intermediate/root only cert (2nd link down in the InCommon email)
>>>>>>
>>>>>> Matt Haught
>>>>>> North Carolina State University
>>>>>>
>>>>>>
>>>>>> On Tue, Aug 26, 2014 at 5:49 PM, Jason Aubrey <aubreyja at gmail.com>
>>>>>> wrote:
>>>>>> > Well, at this point I think the error has something to do with how
>>>>>> my ssl is
>>>>>> > configured.  Here is some evidence from my apache log with LogLevel
>>>>>> info:
>>>>>> >
>>>>>> > There were a lot of errors: 500 Can't connect to
>>>>>> > webwork.math.arizona.edu:443
>>>>>> <https://urldefense.proofpoint.com/v1/url?u=http://webwork.math.arizona.edu:443&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=hIi8Y6c%2BF6urweTkKtsDeHM2YeEf66fH%2BdSLpZNJEOE%3D%0A&s=659704ee979814c39994ceb4ce07d99d6c2c6560c6cac50cdf09c2cb8a72a7bf>
>>>>>> at /opt/webwork/webwork2/lib/WebworkClient.pm
>>>>>> > line 158
>>>>>> >
>>>>>> > [Tue Aug 26 14:35:13 2014] [info] [client 127.0.0.1] SSL library
>>>>>> error 1 in
>>>>>> > handshake (server webwork.math.arizona.edu:443
>>>>>> <https://urldefense.proofpoint.com/v1/url?u=http://webwork.math.arizona.edu:443&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=hIi8Y6c%2BF6urweTkKtsDeHM2YeEf66fH%2BdSLpZNJEOE%3D%0A&s=659704ee979814c39994ceb4ce07d99d6c2c6560c6cac50cdf09c2cb8a72a7bf>
>>>>>> )
>>>>>> > [Tue Aug 26 14:35:13 2014] [info] SSL Library Error: 336151576
>>>>>> > error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca
>>>>>> > [Tue Aug 26 14:35:13 2014] [info] [client 127.0.0.1] Connection
>>>>>> closed to
>>>>>> > child 0 with abortive shutdown (server webwork.math.arizona.edu:443
>>>>>> <https://urldefense.proofpoint.com/v1/url?u=http://webwork.math.arizona.edu:443&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=hIi8Y6c%2BF6urweTkKtsDeHM2YeEf66fH%2BdSLpZNJEOE%3D%0A&s=659704ee979814c39994ceb4ce07d99d6c2c6560c6cac50cdf09c2cb8a72a7bf>
>>>>>> )
>>>>>> >
>>>>>> > So, you can see (1) that 'it' can't connect to
>>>>>> webwork.math.arizona.edu:443
>>>>>> <https://urldefense.proofpoint.com/v1/url?u=http://webwork.math.arizona.edu:443&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=hIi8Y6c%2BF6urweTkKtsDeHM2YeEf66fH%2BdSLpZNJEOE%3D%0A&s=659704ee979814c39994ceb4ce07d99d6c2c6560c6cac50cdf09c2cb8a72a7bf>
>>>>>> > and (2) the ssl handshake seems to be dying due to an unknown
>>>>>> certificate
>>>>>> > authority.  But if you looked at my server, you would see (3) that
>>>>>> my
>>>>>> > certificate authority is in fact well known:
>>>>>> >>
>>>>>> >> Issued By
>>>>>> >>
>>>>>> >> Common Name (CN) InCommon Server CA
>>>>>> >>
>>>>>> >> Organizaton (O) Internet2
>>>>>> >>
>>>>>> >> etc...
>>>>>> >
>>>>>> > Also, there is the fact that (4) my web browsers have no problem
>>>>>> connecting
>>>>>> > to the https site.
>>>>>> > So,
>>>>>> > (a) Maybe the perl module(s) running the webservice calls (LWP?)
>>>>>> don't
>>>>>> > recognize the certificate authority.
>>>>>> > (b) Maybe the way my redirect to ssl is set up is messing with the
>>>>>> web
>>>>>> > service calls. (Permanent redirect to a *:443 vhost)
>>>>>> > (c) Maybe there is some other configuration problem with my ssl set
>>>>>> up.
>>>>>> > (d) Maybe this is completely unrelated to the actual problem.
>>>>>> >
>>>>>> > Thanks for any ideas.
>>>>>> > Jason
>>>>>> >
>>>>>> _______________________________________________
>>>>>> webwork-devel mailing list
>>>>>> webwork-devel at webwork.maa.org
>>>>>> http://webwork.maa.org/mailman/listinfo/webwork-devel
>>>>>> <https://urldefense.proofpoint.com/v1/url?u=http://webwork.maa.org/mailman/listinfo/webwork-devel&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=hIi8Y6c%2BF6urweTkKtsDeHM2YeEf66fH%2BdSLpZNJEOE%3D%0A&s=f02b3d4aa31c9f5bdb0b9e2da8bbe66c3f5c55044c9d192f6f36541793737fbd>
>>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> webwork-devel mailing list
>>>>> webwork-devel at webwork.maa.org
>>>>> http://webwork.maa.org/mailman/listinfo/webwork-devel
>>>>> <https://urldefense.proofpoint.com/v1/url?u=http://webwork.maa.org/mailman/listinfo/webwork-devel&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=hIi8Y6c%2BF6urweTkKtsDeHM2YeEf66fH%2BdSLpZNJEOE%3D%0A&s=f02b3d4aa31c9f5bdb0b9e2da8bbe66c3f5c55044c9d192f6f36541793737fbd>
>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> webwork-devel mailing list
>>>> webwork-devel at webwork.maa.org
>>>>
>>>> https://urldefense.proofpoint.com/v1/url?u=http://webwork.maa.org/mailman/listinfo/webwork-devel&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=hIi8Y6c%2BF6urweTkKtsDeHM2YeEf66fH%2BdSLpZNJEOE%3D%0A&s=f02b3d4aa31c9f5bdb0b9e2da8bbe66c3f5c55044c9d192f6f36541793737fbd
>>>>
>>>>
>>>
>>>
>>> --
>>> Prof. Arnold K. Pizer
>>> Dept. of Mathematics
>>> University of Rochester
>>> Rochester, NY 14627
>>> (585) 766-8812
>>>
>>> _______________________________________________
>>> webwork-devel mailing list
>>> webwork-devel at webwork.maa.org
>>> http://webwork.maa.org/mailman/listinfo/webwork-devel
>>> <https://urldefense.proofpoint.com/v1/url?u=http://webwork.maa.org/mailman/listinfo/webwork-devel&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=qcv1sUmY2mmPdAagwB7DjEHK%2FmPDlw6Qt7YtABKv6do%3D%0A&s=9c972ecbed0fdbb30c086953ea4315f9ae5d19e9d5bba619d57c28a460e32459>
>>>
>>>
>>
>> _______________________________________________
>> webwork-devel mailing list
>> webwork-devel at webwork.maa.org
>>
>> https://urldefense.proofpoint.com/v1/url?u=http://webwork.maa.org/mailman/listinfo/webwork-devel&k=p4Ly7qpEBiYPBVenR9G2iQ%3D%3D%0A&r=g5j9%2FzBITNFXnOqzhQf%2B0b%2F2j5jSmy74eqJk2rpyoc4%3D%0A&m=qcv1sUmY2mmPdAagwB7DjEHK%2FmPDlw6Qt7YtABKv6do%3D%0A&s=9c972ecbed0fdbb30c086953ea4315f9ae5d19e9d5bba619d57c28a460e32459
>>
>>
>
>
> --
> Prof. Arnold K. Pizer
> Dept. of Mathematics
> University of Rochester
> Rochester, NY 14627
> (585) 766-8812
>
> _______________________________________________
> webwork-devel mailing list
> webwork-devel at webwork.maa.org
> http://webwork.maa.org/mailman/listinfo/webwork-devel
>
>
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