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errors on currently configured webauth machine

Thomas Carlson tec at
Fri Dec 11 15:19:29 PST 2015

On 12/10/15 5:54 PM, Russ Allbery wrote:
> Thomas Carlson <tec at> writes:
>> [Thu Dec 10 16:28:20 2015] [error] mod_webauth: curl_easy_perform:
>> error(35): error:0D0890A1:asn1 encoding routines:ASN1_verify:unknown
>> message digest algorithm
> mod_webauth is trying to get a webkdc-service token from the WebKDC, and
> that attempt is failing because your local SSL library doesn't like the
> message digest algorithm being used by the WebKDC server certificate.
> Why, I don't know.  I suspect either your SSL implementation is too old or
> the WebKDC certificate is too old.  If the
> certificate was recently changed, that would be the first thing I'd look
> at: what message digest algorithm was it using before, and what it is it
> using now, and what OpenSSL is your mod_webauth installation using?
Thanks for the quick reply and sorry about the slow response. I'm out of 
the office traveling to visit family.

It looks like the openssl version needs to be upgraded and work is 
underway to do that.

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