CI / SSO Logo / login_logo.svg

UCS - Univention Corporate Server
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1

Dear Community, dear univention team,

I’m now on 4.3, but still not found a configuration parameter to set the logo, which is displayed at the SSO page. Is such a feature implemented? How to reach it?

Thanks a lot,
Best,
meg

2

Hey,

which logo is used on the login page cannot be configured at the moment. I see three ways to circumvent this:

  1. Edit the file that generates the HTML code, /usr/share/simplesamlphp/modules/univentiontheme/themes/univention/core/loginuserpass.php, and let it output a path to your own logo. Advantage: you can use any type of picture format for the logo. Disadvantage: whenever you update your system (rather: the package univention-web), your modifications will be overwritten and you have to re-apply them.
  2. Replace the file in the file system with your own logo: /usr/share/univention-web/js/dijit/themes/umc/images/login_logo.svg . Disadvantages: whenever you update your system (rather: the package univention-web), your modifications will be overwritten and you have to re-apply them, and your logo has to be in SVG format.
  3. Configure Apache to deliver another file on accesses to the URL. Advantage: rather safe wrt. system upgrades. Potential disadvantage: your own logo needs to be in SVG file in this case.

The third would be my choice. Here’s how that might look (untested):

  1. Create the file /etc/apache2/conf-available/custom-logo.conf with the following content:
    Alias /univention/js/dijit/themes/umc/images/login_logo.svg /path/to/my/custom_logo.svg
  2. Enable the configuration with: a2enconf custom-logo
  3. Reload Apache: systemctl reload apache2

Kind regads,
mosu

2 Likes
3

Why ever, this is not working :frowning:

Same on Redirect

4

Hey,

you’re right, it doesn’t work for me either (I didn’t actually test my solution before posting it).

What I did test, and what does work, is the following:

  1. Enable mod_rewrite: a2enmod rewrite
  2. Modify the custom-logo.conf file you’ve already created to contain the following content:
    RewriteRule /univention/js/dijit/themes/umc/images/login_logo.svg /path/to/my/custom_logo.svg [L]
  3. Restart Apache: systemctl restart apache2

You may have to clear your browser’s cache if the old logo is still shown afterwards.

m.

1 Like
5

Fast perfekt. Leider greift diese Einstellung nicht für den virtualhost ucs-sso (oder andere wo das logo noch verwendet wird). Ist es möglich diese Regel global auszurollen?
RewriteOptions InheritDown Scheint leider nicht zum Erfolg zu führen :confused:

6

option 4: use dpkg-divert

With dpkg-divert you can redirect login_logo.svg to another file (e.g.login_logo.svg_org) and put your logo to login_logo.svg yourself.

dpkg-divert --add --rename --divert \
 /usr/share/univention-web/js/dijit/themes/umc/images/login_logo.svg_org \
 /usr/share/univention-web/js/dijit/themes/umc/images/login_logo.svg

Have a look at the changes with vimdiff /var/lib/dpkg/diversions*.

To simulate an upgrade, you can run univention-install --reinstall univention-web-style.

1 Like
7

Hey,

This is most likely due to the existing rewrite rules the SAML virtual host uses (see /etc/apache2/sites-available/univention-proxy.conf; the rule RewriteRule ^/univention/(.*)$ %{DOCUMENT_ROOT}%{REQUEST_FILENAME} [END] is probably the culprit).

In this case using dpkg-divert as Thorsten has suggested is the better choice.

Remember that you have to do that not only on your DC Master, but on all servers that can act as a SAML provider (see host ucs-sso.$(ucr get domainname)).

Kind regards,
mosu

1 Like
8 
**dpkg-divert:** **Fehler:** Umbenennen beinhaltet Überschreiben von »/usr/share/univention-web/js/dijit/themes/umc/images/login_logo.svg« mit

anderer Datei »/var/www/24.svg«, nicht erlaubt

:frowning:

P.S. using sudo.

→ Have to rename/remove the original before :wink:

=> but even that seems not working. Still seeing the default Logo :frowning:

9

that should be a caching problem => STRG+SHIFT+R

10

Tried everything…

But funny thing, since update to errata704 it is working :wink:

So, finally SOLVED
Thanks everyone who was involved.

11

And after 711 everything is gone again :cry:

sudo dpkg-divert --list | grep logo
lokale Umleitung von /usr/share/univention-web/js/dijit/themes/umc/images/login_logo.svg zu /var/www/24.svg
12

Hallo liebe Univentioner,
seems that 24.svg will now overwritten on every package install/update with /usr/share/univention-web/js/dijit/themes/umc/images/login_logo.svg

13

Dear Community, dear Univention Team,

Is there any “cooler” solution in 4.4 or do I still have to replace the logo on every update?

14

Dear Community, dear Univention Team,

is there any smoother solution than replacing the logo after every errata update?
This is annoying :frowning:

15

I suggest to subscribe to our errata / security announcement mailinglist to get informed about UCS Errata updates. I think your requirement can now be implemented when updating to a recent UCS version. Check the UCS 4.4-1 changelog - I put links to the relevant sections below. Search for css…

https://docs.software-univention.de/release-notes-4.4-1-de.html#changelog:umc:web
https://docs.software-univention.de/release-notes-4.4-1-de.html#changelog:service:saml

1 Like
16

Whyever this is not working anymore.

17

I also need to implement this. Is there any other solution than replacing the logo under /usr/share/univention-web/js/dijit/themes/umc/images/login_logo.svg ?

Cheers

1 Like
18

I don’t know what else I have configured to make this work. But my logo is here: “/usr/share/univention-portal/icons/logos/domain.png” and it actually works since a few updates. even the update -> UCS 5 didn’t kill it.