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Webauth error starting on Sunday

Kai Lanz lanz at stanford.edu
Mon Dec 14 11:20:42 PST 2015


Further research suggests this might not be an issue with the signing authority; were the weblogin or other certs
recently upgraded to SHA-2, or the SHA256 hash? If so, what is our fix, given the errors below?

— Kai

On Dec 14, 2015, at 10:07 AM, Kai Lanz <lanz at stanford.edu> wrote:

> Starting Sunday, Dec. 13, at about 4am, we started getting errors from webauth on our department server, Pangea.
> We have the following in apache’s error_log:
> 
> [Sun Dec 13 17:00:01 2015] [error] mod_webauth: curl_easy_perform: error(35): error:0D0890A1:asn1 encoding routines:func(137):reason(161)
> [Sun Dec 13 17:00:01 2015] [error] mod_webauth: mwa_get_service_token: couldn't get new service token from webkdc
> [Sun Dec 13 17:00:01 2015] [emerg] mod_webauth: mwa_get_service_token FAILD!!
> [Sun Dec 13 17:00:01 2015] [emerg] mod_webauth: redirect_request_token: no service token, denying request
> [Sun Dec 13 17:00:01 2015] [warn] mod_webauth: failure_redirect: no URL configured
> 
> Googling for these errors turns up a post from Russ Allbery in 2013 which says these symptoms occur when the
> campus KDC admins renew their SSL cert, and the new cert uses a different signing authority from the old one.
> 
> Was there an update to the SSL certs on our KDCs over the weekend? It has broken webauth on our server; we
> rely on webauth pretty extensively, and a lot of our pages are now inaccessible. If Russ’s old post is correct, what
> is the new signing authority? How can I incorporate that into our config on Pangea to fix this? (I have a ca-bundle.crt
> file in /usr/share/ssl/certs which I could update if I knew who the new signer is.)
> 
> — Kai Lanz
> Senior System Administrator




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