An open discussion list for topics related to the eduGAIN interfederation service.

[Davide Vaghetti <davide.vaghetti AT garr.it>]

Hello there,

As some of you might know, lately we had an issue with a more-than 800 
kbytes inine logo. For example it might be related to metadata loading 
problems for the SHibboleth SP as reported below:


https://shibboleth.1660669.n2.nabble.com/SP-metadata-cache-keeps-growing-td7645484.html#a7645594

Alex Stuart, that is also part of the eduGAIN support team, shared with 
us some insights on the sizes of inline logos in the eduGAIN metadata.

Alex also anticipated that UKf is planning to filter inline logos bigger 
than 40/100 KB (not yet clear). So the question is, what do you guys see 
as a reasonable size for inline logos in eduGAIN?

Cheers,
Davide

-------- Forwarded Message --------
Subject: [edugain-support-team] Sizes of inline logos in eduGAIN metadata
Date: Tue, 10 Mar 2020 09:05:19 +0000
From: Alex Stuart <Alex.Stuart AT jisc.ac.uk>
Reply-To: edugain-support-team AT lists.geant.org
To: edugain-support-team AT lists.geant.org 
<edugain-support-team AT lists.geant.org>

Dear Colleagues,

At the last support team meeting, Marina asked if we knew the 
distribution of sizes of inline logos. I've therefore extracted this 
information from eduGAIN metadata using 
https://gitlab.com/alexinshandon/logo-distribution. The script outputs 
the size above a threshold, the entityID, and the registrationAuthority 
of the federation that registered the entity.

The data below is taken from the eduGAIN aggregate a couple of days ago 
(after the 800kB logo was removed).

If this kind of data is useful, I can add it to the UK federation's 
checking framework and set it to run regularly.

And just for information: Ian's writing an import filter for the UK 
federation to discard logos above a threshold. We've yet to discuss what 
the threshold is (could be 40kB, maybe 100kB). When we do that, I 
presume the modified entries will show as WARN messages in the UK 
federation metadata import logs at 
https://www.ukfederation.org.uk/fed/edugain-import-log-with-diff.txt

Regards,
Alex

# size-of-logo  entityID        registrationAuthority
161018  https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
159718  https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
145994  https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
118870  https://login.uoc.gr/idp/shibboleth     http://aai.grnet.gr/
116578  https://idp.ung.si/idp/20111102 http://aai.arnes.si
94618	https://saml1.dmjx.dk/simplesaml/saml2/idp/metadata.php 
https://www.wayf.dk
82066   https://idp.hmu.gr/idp/shibboleth       http://aai.grnet.gr/
79626   https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
78710   https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
73770   https://login.ntua.gr/idp/shibboleth    http://aai.grnet.gr/
72774   https://idp.sc-nm.si/idp/20150127       http://aai.arnes.si
63958   https://idp2.dcu.ie/idp/profile/Metadata/SAML   http://www.heanet.ie
60642 
https://proxy.safire.ac.za/birk.php/saml.uwc.ac.za/simplesaml/saml2/idp/metadata.php 
https://safire.ac.za
53602   https://idp3.umt.edu.my/idp/shibboleth  https://sifulan.my
52370 
https://proxy.safire.ac.za/birk.php/idp.wsu.ac.za/simplesaml/saml2/idp/metadata.php 
https://safire.ac.za
49510   https://sso.unisza.edu.my/idp/shibboleth        https://sifulan.my
48974   http://auth.msk.dk/adfs/services/trust  https://www.wayf.dk
46455   http://fs.ibc.dk/adfs/services/trust    https://www.wayf.dk
45970   https://idp.teithe.gr/idp/shibboleth    http://aai.grnet.gr/
43830   https://idp.uowm.gr/idp/shibboleth      http://aai.grnet.gr/
43106   https://idp.ionio.gr/idp/shibboleth     http://aai.grnet.gr/
41435   https://idp.it-tallaght.ie/idp/shibboleth       http://www.heanet.ie
41435   https://idp.dit.ie/idp/shibboleth       http://www.heanet.ie
41435   https://edugate.itb.ie/idp/shibboleth   http://www.heanet.ie


—
Alex Stuart, Technical Development Manager (Trust and Identity)
alex.stuart AT jisc.ac.uk